CROSS REFERENCE TO RELATED APPLICATIONS
BACKGROUND
[0002] Below liquid manways (BLMs) exist that are used as access points for tanks or containers.
For example, BLMs exist that are used in fermentation and storage tanks as access
points to empty and/or clean bottoms of the tanks. These types of BLMs provide liquid-tight
seals, and contain head pressures from vertical columns of liquid contained in the
tanks.
[0003] A typical BLM has a hinged door, swing bolts, and a seal. Because this type of BLM
has hinges pivotably fixing the door to the tank, it is difficult to manage a flow
rate of product emptying out of the tank. Moreover, the BLM has hinges pivotably fixing
the door to the tank, the interface between the BLM and the tank creates interferences
(e.g., lips, walls, bridges) across the opening of the BLM. Thus, the BLM impedes
the flow of product emptying from the tank and/or builds up (e.g., bridges) product
across the opening of the BLM, making the removal and/or cleaning of the product from
the bottom of the tank more labor intensive, time consuming, and costly. While, existing
BLMs may provide liquid tight seals for containing products in tanks, they are unable
to manage flow rates of products emptying out of the tanks, and impede the flow of
products emptying from the tanks, which make them more labor intensive, time consuming,
and costly.
[0004] Sliding gate BLMs also exist that are used as access points for tanks or containers.
However, these types of BLMs are not liquid tight and have a short useable life. For
example, sliding gate BLMs tend to leak product under pressure. Moreover, because
the sliding gate BLM's slide along seals, the sliding gate BLMs aggressively abrade
the seals, shortening the useable life of the seals.
[0005] Accordingly there remains a need in the art for a BLM that easily opens and closes
to manage a flow rate of product emptying out of a tank, does not impede the flow
rate of product emptying out the tank, and provides a liquid tight seal under pressure
of a vertical column of product contained in the tank.
SUMMARY
[0006] This summary is provided to introduce simplified concepts of a manway gate assembly
and method, which is further described below in the Detailed Description. This summary
is not intended to identify essential features of the claimed subject matter, nor
is it intended for use in determining the scope of the claimed subject matter.
[0007] In one example, a container comprising a tank for holding a product may include a
manway gate assembly coupled to the tank. The manway gate assembly may comprise a
gate slideably disposed in a first plane adjacent to a surface of the tank. The gate
may be slideably displaced in the first plane along the surface of the tank between
an open position, a closed position, and/or an intermediate position between the open
position and the closed position.
[0008] In another example, the manway gate assembly may include one or more locking members
having a longitudinal axis movably disposed in a second plane parallel to the first
plane. In one example, the one or more locking members may slide in the second plane
parallel to the first plane. In another example, the one or more locking members may
rotate in the second plane parallel to the first plane. The one or more locking members
may be displaced between a locked position and an unlocked position. The one or more
locking members may apply a locking force to the gate in a direction perpendicular
to the first and second planes to seal the gate to the surface of the tank in the
locked position.
[0009] In another example, the manway gate assembly may be coupled to a tank.
[0010] The tank may have a non-zero slope relative to a horizontal support surface (e.g.,
a sloped bottom surface) opposite a top surface, a wall fixed between the bottom and
top surfaces, and an aperture arranged in the wall of the tank. The aperture may be
arranged in the wall of the tank proximate to the lowest portion of the slope of the
bottom surface of the tank.
[0011] The aperture may comprise a sealing surface to seal with the gate of the manway gate
assembly. In one example, the gate may include one or more locking members slideably
arranged adjacent to the gate. In another example, the gate may include one or more
locking members rotatably arranged adjacent to the gate.
[0012] In another example, a manway sliding gate assembly for coupling with a container
and arranged to empty a liquid product held in the container may include a gate and
one or more locking members. The gate may selectively slide in a first linear direction
between an open position, a closed position, and/or an intermediate position between
the open position and the closed position. In one example, the one or more locking
members may be movably arranged adjacent to an outer perimeter of the gate.
[0013] Depending on the desired esthetic and mechanical properties of the manway gate assembly
and/or the tank, and a substance that the tank is intended to hold, components may
comprise metal, plastic, and/or ceramic. For example, in some embodiments, the manway
gate assembly and/or the tank may comprise steel (e.g., stainless steel), copper,
and/or aluminum.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The detailed description is set forth with reference to the accompanying figures.
In the figures, the left-most digit(s) of a reference number identifies the figure
in which the reference number first appears. The use of the same reference numbers
in different figures indicates similar or identical items.
FIG. 1 A illustrates a front view of an example manway gate assembly coupled to a
tank.
FIG. 1B illustrates a side view of the example manway gate assembly and tank shown
in FIG. 1 A.
FIG. 2 illustrates a front view, side view, and perspective view of the example manway
gate assembly shown in FIGS. 1 and 2.
FIG. 3 illustrates a detail view of a rod connection of the example manway gate assembly
shown in the front view of FIG. 2 taken at location A.
FIG. 4 illustrates a detail view of a locking member of the example manway gate assembly
shown in the front view of FIG. 2 taken at location D.
FIG. 5 illustrates a detail section view of the example manway gate assembly shown
in the front view of FIG. 2 taken along line B-B.
FIG. 6 illustrates a detail section view of the example manway gate assembly shown
in the front view of FIG. 2 taken along line C-C, and a detail view of a receiver
cooperating with a bottom edge of a gate shown in the detail section view of FIG.
6 taken at location E.
FIG. 7 is a flow diagram illustrating an example process of closing and locking a
tank via the example manway gate assembly shown in FIGS. 1 and 2.
FIG. 8 illustrates a front view, side view, and perspective view of another example
manway gate assembly.
FIG. 9 illustrates a detail view of a rod connection of the example manway gate assembly
shown in the perspective view of FIG. 8 taken at location F.
FIG. 10 illustrates a detail view of a locking member of the example manway gate assembly
shown in the front view of FIG. 8 taken at location G.
FIG. 11 illustrates a detail view of the locking member of the example manway gate
assembly shown in the side view of FIG. 8 taken at location H.
FIG. 12 illustrates a detail section view of the example manway gate assembly shown
in the front view of FIG. 8 taken along line I-I.
FIG. 13 illustrates a detail section view of the example manway gate assembly shown
in the front view of FIG. 8 taken along line J-J.
FIG. 14 is a flow diagram illustrating an example process of closing and locking a
tank via the example manway gate assembly shown in FIG. 8.
DETAILED DESCRIPTION
Overview
[0015] This disclosure is directed to manway gate assemblies for containing products in
tanks that are liquid tight under pressure of vertical columns of products in the
tanks. A manway gate assembly according to one example embodiment may include a gate
slideable between an open position, a closed position, and/or an intermediate position
between the open position and the closed position. Such an example manway gate provides
control to manage a flow rate of product emptying out of the tank, without abrading
a seal between the slideable gate and the tank. For example, a user may simply activate
an actuator connected to the gate to slideably displace the gate between the open
position, the closed position, and/or the intermediate position between the open position
and the closed position along a surface of the tank, but without the gate coming in
contact with or abrading the seal between the gate and the tank. Stated otherwise,
the gate is spaced from and avoids contact with the seal surface during the linear
displacement of the gate, thus eliminating any abrasion of the seal between the gate
and the tank. In one example, the closed position of the gate may be when a bottom
edge of the gate engages with a receiver. In another example, the closed position
of the gate may be when a bottom edge of the gate engages with one or more pads or
stops. In another example, the closed position of the gate may be when the gate is
in contact with the seal surface.
[0016] The manway gate assembly may include one or more locking members arranged adjacent
to the gate. For example, the manway gate assembly may include one or more pins or
bolts arranged adjacent to the gate. Further, the one or more pins or bolts may be
arranged adjacent to an exterior surface of the gate. As another example, the one
or more pins or bolts may be arranged adjacent to a surface of the tank. For example,
the one or more pins or bolts may be arranged adjacent to an exterior surface of the
tank. The one or more locking members may be slideably displaced between a locked
position and an un-locked position, which will in turn apply a biasing force to the
gate in a direction perpendicular to a sealing surface of the tank to seal the gate
to the sealing surface in the locked position. For example, the gate may selectively
slide in a first linear direction, between an open position, a closed position, and/or
an intermediate position between the open position and the closed position. Then,
moving the one or more pins slideably arranged adjacent to the gate may displace the
gate in a second linear direction perpendicular to the first linear direction and
may seal the gate to the sealing surface of the tank. When in the locked position
the one or more pins lock or fix the gate in the sealed position such that the gate
cannot inadvertently be opened or moved. In another example, the manway gate assembly
may include one or more locking members (e.g., pins or bolts) rotatably arranged adjacent
to the gate. Additional details regarding this particular manway gate assembly are
provided below in the discussion of FIG. 8 through FIG. 14.
[0017] In some examples, the manway gate assembly may include a frame arranged around the
gate. The frame may comprise one or more apertures arranged in the frame. In one example,
the one or more apertures may removeably receive the one or more locking members.
For example, the one or more apertures arranged in the frame may cooperate with one
or more pins to displace the gate in the second linear direction perpendicular to
the first linear direction to seal the gate to the seal surface of the tank. For example,
the one or more apertures may cooperatively receive tapered ends of the one or more
pins to apply a biasing force to the gate in the second linear direction. For example,
when the one or more pins are in the locked position (e.g., fully engaged with the
one or more apertures), the one or more tapered pins tightly press the gate door against
an elastomeric seal thus creating a liquid tight seal capable of not leaking under
pressure (e.g., up to at least about 17 psi). In another example, the one or more
apertures arranged in the frame may slideably receive the one or more locking members
to guide the gate in the first linear direction.
[0018] In some embodiments, the manway gate assembly may include a cam coupled to the gate
and connected to the one or more locking members. In one example, the cam may be connected
to one or more locking members to slideably displace the one or more locking members
between the locked position and the un-locked position. For example, the gate may
include a manual cam (e.g., camlock) that when manually rotated by a user slideably
displaces the one or more locking members between the locked position and the un-locked
position. Moreover, the gate may include an actuator coupled to the cam that when
actuated (e.g., energized) by a user, slideably displaces the one or more pins between
the locked position and the un-locked position. In another example, the cam may be
connected to one or more pins to rotate the one or more pins between the locked position
and the un-locked position. For example, the gate may include an actuator coupled
to a cam that when actuated (e.g., energized) by a user rotating the one or more pins
between the locked position and the un-locked position. Further, the gate may include
more than one cam and/or eccentric to displace the one or more locking members between
the locked position and the un-locked position.
Illustrative Manway Gate Assembly
[0019] FIG. 1A illustrates a front view of an example manway gate assembly 102 coupled to
a tank 104. In one example, the tank 104 may be a fermentation tank. For example,
the tank 104 may be a wine fermenter for holding a juice. The tank 104 may be a self-emptying
or self-cleaning tank. For example, once the fermentation process has been completed,
and the wine (juice) removed, the pomace remains in the bottom of the tank (e.g.,
tank 104). The pomace consists of grape skins, seeds, and spent yeast. This must be
removed from the tank where it will be subsequently pressed of any remaining juice
and disposed of. Typically the pomace is removed manually with rakes and shovels,
requiring considerable time and manpower. For example, cleaning a tank may take several
workers several hours. Moreover, some of the workers would have to enter the tank
and be exposed to a potential health hazard from carbon dioxide (as a by-product from
fermentation) poisoning. Self-emptying tanks are sometimes used and are faster and
less labor intensive to empty the pomace from the self-emptying tanks. The tank 104
may have a volume of about 30,000 gallons and ferment about 100 tons of grapes. However,
in other embodiments larger or smaller tanks may be used. In the illustrated example,
the tank 104 has an outside diameter 106 of about 177 inches. The tank 104 may take
less than an hour (e.g., about 45 minutes) to self-empty the pomace from tank 104,
and not require a single worker to enter the tank 104.
[0020] FIG. IB illustrates a side view of the example manway gate assembly 102 and tank
104 shown in FIG. 1. FIG. IB illustrates the tank 104 includes a bottom surface 108
opposite a top surface 110. The bottom surface 108 may have a non-zero slope 112 relative
to a horizontal support surface (e.g., surface of ground). For example, the bottom
surface 108 may have a slope to provide for the pomace having somewhat the consistency
of jam to slide out easily. In most examples, the slope of the bottom surface 108
may be at least about a 0.1 inch rise to a 12 inch run, up to at most about a 2 inch
rise to a 12 inch run. However, in some instances, slopes above or below this range
may also be used.
[0021] FIG. IB illustrates a tank having a height 114 of about 362 inches from surface of
ground 116 to a top 118 of the tank 104. The lowest portion 120 of the slope 112 of
the bottom surface 108 of the tank 104 may be arranged a distance 122 above the ground
116. For example, the lowest portion 120 of the slope 112 of the bottom surface 108
of the tank 104 may be arranged about 42 inches above the ground 116 to provide for
placing a receptacle (e.g., box, container, bin) under the manway gate assembly 102.
While the tank and manway gated assemblies are described having certain shapes, sizes,
and configurations they are simply specific illustrated embodiments and other dimensions
are possible. For example, a tank may range from about a 300 gallon tank up to about
a 42,000 gallon tank. In another example, a tank may have a height of about 50 inches
up to about 480 inches.
[0022] The manway gate assembly 102 may be coupled to the tank 104 proximate to the lowest
portion 120 of the slope 112 of the bottom surface 108 of the tank 104 configured
to provide for controlling the flow rate of product (e.g., pomace) emptying from the
tank 104 to the receptacle. FIGS. 1A and 1B illustrates a wall 124 fixed between the
bottom surface 108 and the top surface 110. An aperture may be arranged in the wall
124 of the tank 104 proximate to the lowest portion 120 of the slope 112 of the bottom
surface 108 of the tank 104. The aperture may comprise a sealing surface arranged
around a perimeter of the aperture. A neck 126 may be arranged around the aperture
and coupled to the wall 124 of the tank 104 proximate to the lowest portion 120 of
the slope 112 of the bottom surface 108 of the tank 104. The neck 126 may comprise
a sealing surface arranged distal to an outside surface of the wall 124 of the tank
104. FIGS. 1A and 1B illustrate the manway gate assembly 102 arranged around the neck
126 configured to empty the product held in the tank 104. Depending on the size of
a tank, the manway gate assembly 102 may be required to provide a liquid tight seal
against a head pressure of about 17 psi.
[0023] FIG. 2 illustrates a front view 202, side view 204, and perspective view 206 of the
example manway gate assembly 102 shown in FIGS. 1 and 2 with the tank omitted for
clarity. Front view 202 illustrates the manway gate assembly 102 comprising a gate
208 configured to selectively slide in a first linear direction 210 between an open
position, a closed position, and/or an intermediate position between the open position
and the closed position. In one example, the gate 208 may comprise a substantially
planar rectangular shaped plate. In another example, the gate 208 may comprise a curvilinear
rectangular shaped plate to match a radius of the tank. One or more locking members
212 may be slideably arranged adjacent to the gate 208. The one or more locking members
212 may be configured to slideably displace between a locked position and an un-locked
position. The one or more locking members 212 apply a biasing force to the gate in
a direction perpendicular the first linear direction 210 in the locked position. The
one or more locking members 212 may be pins, rods, bolts, bars etc.
[0024] Front view 202 illustrates a frame 214 arranged around the gate 208. Side view 204
illustrates the frame 214 comprising one or more apertures 216 arranged in the frame
214 configured to removeably receive the one or more locking members 212. Side view
204 illustrates the one or more apertures 216 may cooperate with the one or more locking
members 212 configured to displace the gate in a second linear direction 218 perpendicular
to the first linear direction 210. For example, the one or more apertures 216 may
cooperatively receive tapered ends of the one or more locking members 212 to displace
the gate 208 in the second linear direction 218 to tightly press the gate 208 against
a gasket (e.g., an elastomeric seal) thus creating a liquid tight seal.
[0025] Front view 202 illustrates an actuator 220 (e.g., a pneumatic cylinder, a hydraulic
cylinder, an electric motor with a linear gear, etc.) coupled to the frame 214 and
connected to the gate 208. The actuator 220 is configured to selectively slide the
gate 208 along a sealing surface 222 of the neck 126 between the open position, the
closed position, and/or an intermediate position between the open position and the
closed position. The neck 126 may comprise a wall 224 fixed perpendicular to the surface
of the tank 104. As discussed above with regard to FIGS. 1A and IB, the neck 126 may
be coupled to the wall 124 of the tank 104 proximate to the lowest portion 120 of
the slope 112 of the bottom surface 108 of the tank 104, and the sealing surface 222
may be arranged distal to an outside surface of the wall 124 of the tank 104. For
example the wall 224 of the neck 126 may be fixed to the wall 124 of the tank 104
proximate to the lowest portion 120 of the slope 112 of the bottom surface 108 of
the tank 104. The wall 224 of the neck 126 may have an outer edge (e.g., sealing surface
222) arranged around a perimeter of the wall 224 of the neck 126 and distal to the
surface of the tank 104. The one or more locking members 212 may apply a biasing force
to the gate 208 in the second linear direction 218 perpendicular to the sealing surface
222 to seal the gate to the sealing surface 222 of the neck 126 in the locked position.
[0026] The gate 208 may be arranged to selectively slide parallel to the sealing surface
222 of the neck 126 between the open position, the closed position, and/or an intermediate
position between the open position and the closed position. The gate 208 may be slideably
disposed in a first plane adjacent to a surface (e.g., wall 124) of the tank 104,
and the gate 208 may slideably displace in the first plane along the surface of the
tank 104 between an open position, a closed position, and/or an intermediate position
between the open position and the closed position. The gate 208 may comprise a gasket
226 coupled to the gate 208 to seal the gate 208 to the sealing surface 222 of the
neck 126 in the locked position. The gasket 226 may cover substantially the entire
rear face of the gate 208 or only a portion of the rear face of the gate 208. The
gasket 226 may comprise a plastic gasket, a rubber gasket, a paper gasket, metal gasket,
a cork gasket, etc. Depending on the material and intended use, gaskets may be elastomeric,
flexible, semi-rigid, etc.
[0027] Front view 202 illustrates a cam 228 connected to the one or more locking members
212 to slideably displace the one or more locking members 212 between the locked position
and the un-locked position. While front view 202 illustrates the cam 228 coupled to
the gate 208 and connected to the one or more locking members 212 to slideably displace
the one or more locking members between the locked position and the un-locked position,
the cam 228 may be coupled to the wall 124 of the tank 104. Further, while front view
202 illustrates a single cam 228 coupled to the gate 208, the gate 208 may include
more than one cam to slideably displace the one or more locking members between the
locked position and the un-locked position. Moreover, the gate 208 may not include
a cam coupled to the gate 208. For example, the actuator may be coupled to the one
or more locking members 212 and the gate 208 and provide for selectively sliding the
gate 208 between the open position, the closed position, and/or the intermediate position
between the open position and the closed position, and slideably displace the one
or more locking members between the locked position and the un-locked position. While
front view 202 illustrates a manually operated cam 228, the manway gate assembly 102
may comprises an actuator connected with the cam 228. For example, a linear actuator
may be coupled to the cam 228 and operate the cam 228 to slideably displace the one
or more locking members between the locked position and the un-locked position.
[0028] Front view 202 illustrates the manway gate assembly 102 may comprise one or more
guide tracks 230 configured to guide the gate 208 in the first linear direction 210.
Front view 202 illustrates the frame 214 has a height 232 of about 72 inches and the
gate 208 has a height 234 of about 32 inches. The frame 214 may have a width 236 of
about 48 inches. One or more sleeves 238 may be coupled to the gate 208 to slideably
receive the one or more locking members 212. The one or more sleeves 238 may have
an outside diameter 240 of about 1.3 inches and the one or more locking members 212
have an outside diameter 242 of about 1 inch.
[0029] FIG. 3 illustrates a detail view of a typical rod connection of the example manway
gate assembly 102 shown in the front view 202 of FIG. 2 taken at location A. FIG.
3 illustrates one or more rods 302 connected to one or more cams 304. The one or more
cams 304 may be connected to the one or more locking members 212. The one or more
cams 304 may be connected to the cam 228. Thus, when the cam 228 is displaced (e.g.,
rotated), the cam 228 displaces the one or more cams 304, and the one or more rods
302 slideably displace the one or more locking members 212.
[0030] FIG. 4 illustrates a detail view of a sleeve of the one or more sleeves 238 coupled
to the gate 208 of the example manway gate assembly 102 shown in the front view 202
of FIG. 2 taken at location D. FIG. 4 illustrates a pin of the one or more locking
members 212 slideably received by the sleeve and in the locked position. For example,
FIG. 4 illustrates the tapered pin in the locked position (e.g., fully engaged with
the one of the one or more apertures 216). The pin is shown connected to one of the
one or more push rods 302.
[0031] FIG. 5 illustrates a detail section view of the example manway gate assembly 102
shown in the front view 202 of FIG. 2 taken along line B-B. FIG. 5 illustrates the
wall 224 of the neck 126 may have an outer edge 502 arranged around a perimeter of
the wall 224 of the neck 126 and distal to the surface of the tank 104. As discussed
above, the outer edge 502 may provide for a sealing surface (e.g., sealing surface
222) configured to seal the gate 208 to the tank 104. For example, and as discussed
above with regard to FIG. 2, the gate 208 may include the gasket 226 covering substantially
the entire rear face of the gate 208 or only a portion of the rear face of the gate
208. Moreover, the tapered ends of the one or more locking members 212 may apply a
biasing force to the gate 208 in the second linear direction 218 to tightly press
(e.g., squeeze, pinch, squish, deform, etc.) the gasket 226 between the gate 208 and
the outer edge 502 of the neck 126, thus creating a liquid tight seal. While FIG.
5 illustrates the one or more locking members 212 displacing the gate 208 in the second
linear direction 218 to tightly press (e.g., squeeze, pinch, squish, deform, etc.)
the gasket 226 to create a liquid tight seal capable not leaking under pressure of
about 17 psi, the one or more locking members 212 may create a liquid tight seal capable
not leaking under pressure of more than 17 psi. For example, the manway gate assembly
102 may include more and/or larger pins configured to provide a greater compression
force to create a liquid tight seal capable not leaking under pressure of more than
about 25, 50, 75, or 100 psi.
[0032] FIG. 6 illustrates a detail section view 602 of the example manway gate assembly
102 shown in the front view of FIG. 2 taken along line C-C, and a detail view 604
of a receiver 606 cooperating with a bottom edge 608 of the gate 208 shown in the
detail section view 602 of FIG. 7 taken at location E. Detail section view 602 illustrates
a passageway 610 having a substantially uniform planar surface 612 that provides for
not impeding the flow of product emptying from the tank 104. For example, the substantially
uniform planar surface 612 of the passageway 610 doesn't build up product across an
opening of the manway gate assembly 102. The detail view 604 illustrates the bottom
edge 608 of the gate 208 securely seats in the receiver 606 and also provides for
not impeding the flow of product emptying from the tank 104.
Example Method of Using a Manway Gate Assembly
[0033] FIG. 7 illustrates an example method 700 of closing and locking a tank (e.g., tank
104) via an example manway gate assembly (e.g., manway gate assembly 102). For instance,
this process may be performed to empty and/or clean a self-emptying or self-cleaning
tank, which has a bottom surface (e.g., bottom surface 108) having a slope (e.g.,
slope 112), which provides for a more efficient removal of pomace in the bottom of
the tank. While FIG. 7 illustrates a method of using an example manway gate assembly
configured to provide a liquid tight seal for a fermentation tank, this method may
apply to using the manway gate assembly with any type of container. For example, the
manway gate assembly may be used with a mash tank, a petroleum tank, a milk tank,
a septic tank, a gas tank, etc.
[0034] Method 700 may include an operation 702, which represents selectively sliding a gate
(e.g., gate 208) in a first linear direction (e.g., first linear direction 210). For
example, a user may selectively slide the gate in the first linear direction between
an open position, a closed position, and/or an intermediate position between the open
position and the closed position. A user may selectively slide the gate in the first
linear direction between an open position, a closed position, and/or an intermediate
position between the open position and the closed position to control a flow rate
of product (e.g., pomace) emptying from the tank. The gate may be selectively moved
between the open, closed, and/or an intermediate positions via an actuator (e.g.,
actuator 220). Method 700 may proceed to operation 704, which represents selectively
sliding the gate in the first linear direction to the closed position. For example,
subsequent to emptying and/or cleaning the product from the tank, a user may selectively
close the gate to the closed position. For example, a user may selectively close the
gate such that a receiver (e.g., receiver 606) cooperatively receives a bottom edge
(e.g., bottom edge 608) of the gate.
[0035] Method 700 may be complete at operation 706, which represents slideably displacing
one or more locking members (e.g., one or more locking members 212) to a locked position,
where the one or more locking members apply a biasing force to the gate in a second
linear direction 218 perpendicular to the first linear direction.
[0036] FIG. 8 illustrates a front view 802, a side view 804, and a perspective view 806
of another example manway gate assembly 808. The front view 802, side view 804, and
perspective view 806 show the manway gate assembly 808 apart from a wall of a tank
for clarity. Front view 802 illustrates the manway gate assembly 808 comprising a
gate 810 to selectively slide in the first linear direction 210 between an open position,
a closed position, and/or an intermediate position between the open position and the
closed position. In one example, the gate 810 may comprise a substantially planar
rectangular shaped plate. In another example, the gate 810 may comprise a curvilinear
rectangular shaped plate to match a radius of the tank. The manway gate assembly 808
may include one or more locking members 812 having a longitudinal axis 814 that rotate
in the second plane parallel to the first plane. For example, the one or more locking
members 812 may be rotatably disposed adjacent to the gate 810, each of the one or
more rotatable locking members 812 configured to rotate about the longitudinal axis
814 of each of the one or more rotatable locking members 812 between the locked position
and the un-locked position. The one or more locking members 812 may apply a biasing
force to the gate 810 in a direction perpendicular to the sealing surface of the aperture
to seal the gate to the sealing surface of the neck in the locked position.
[0037] Front view 802 illustrates a frame 816 arranged around the gate 810. Side view 804
illustrates that the frame 816 comprises one or more apertures 818 arranged in the
frame 816 to slideably receive the one or more locking members 812 to guide the gate
in the first linear direction 210 along the frame 816. Side view 804 illustrates one
or more apertures 818 arranged along the frame 816, which may cooperate with the one
or more locking members 812 to displace the gate in the second linear direction 218
perpendicular to the first linear direction 210. For example, the one or more apertures
818 arranged in the frame 816 may comprise one or more bearing surfaces 820, and the
one or more locking members 812 may comprise one or more cams 822 to bear on the one
or more bearing surfaces 820 to displace the gate 810 perpendicular to the first and
second planes to seal the gate 810 to a surface of a tank. For example, the one or
more locking members may rotate the one or more cams 822 (e.g., round projection,
protrusion, bump, lobe, etc.) in a direction towards the bearing surfaces 820 such
that the one or more cams 822 bear on the bearing surfaces 820 and apply a biasing
force to the gate 810 in the second linear direction 218 to tightly press the gate
810 against the gasket 226 thus creating a liquid tight seal. Further, the one or
more locking members may rotate the one or more cams 822 in a direction towards the
bearing surfaces 820 to the locked position. Similarly, the one or more locking members
812 may rotate the one or more cams 822 in a direction away from the bearing surfaces
820 to the un-locked position. The one or more cams 822 may be coupled to the ends
of the locking members 812. For example, the one or more cams 822 may comprise a collar
or eccentric member mechanically fastened to the ends of a shaft, a pin, a bolt, a
rod, or the like. Alternatively, one or more of the cams 822 may be formed integrally
with the ends of the one or more locking members.
[0038] Front view 802 illustrates the actuator 220 coupled to the frame 816 and connected
to the gate 810. As discussed above, the actuator 220 may be configured to selectively
slide the gate 810 along a sealing surface 222 of an aperture arranged in the wall
of the tank proximate to the lowest portion of the slope of the bottom surface of
the tank. For example, the actuator 220 may be configured to selectively slide the
gate 810 along a sealing surface 222 of an aperture arranged in the wall of the tank
between the open position, the closed position, and/or the intermediate position between
the open position and the closed position. Further, the actuator 220 may be configured
to selectively slide the gate 810 along a sealing surface 222 of a neck 126. The neck
126 may comprise a wall 224 fixed perpendicular to the surface of the tank 104. As
discussed above with regard to FIGS. 1A and IB, the neck 126 may be coupled to the
wall 124 of the tank 104 proximate to the lowest portion 120 of the slope 112 of the
bottom surface 108 of the tank 104, and the sealing surface 222 may be arranged distal
to an outside surface of the wall 124 of the tank 104. For example the wall 224 of
the neck 126 may be fixed to the wall 124 of the tank 104 proximate to the lowest
portion 120 of the slope 112 of the bottom surface 108 of the tank 104. The wall 224
of the neck 126 may have an outer edge (e.g., sealing surface 222) arranged around
a perimeter of the wall 224 of the neck 126 and distal to the surface of the tank
104. The one or more locking members 812 may displace the gate 810 in the second linear
direction 218 perpendicular to the sealing surface 222 to seal the gate to the sealing
surface 222 of the neck 126 in the locked position.
[0039] The gate 810 may be arranged to selectively slide parallel to the sealing surface
222 of the neck 126 between the open position, the closed position, and/or the intermediate
position between the open position and the closed position. The gate 810 may be slideably
disposed in a first plane adjacent to a surface (e.g., wall 124) of the tank 104,
and the gate 810 may slideably displace in the first plane along the surface of the
tank 104 between an open position, a closed position, and/or an intermediate position
between the open position and the closed position. The gate 810 may comprise a gasket
226 coupled to the gate 810 to seal the gate 810 to the sealing surface 222 of the
neck 126 in the locked position. The gasket 226 may cover substantially the entire
rear face of the gate 810 or only a portion of the rear face of the gate 810. The
gasket 226 may comprise an elastomeric gasket, a paper gasket, metal gasket, a cork
gasket, etc.
[0040] Front view 802 illustrates cams 824 and 826 connected to the one or more locking
members 812 to rotatably displace the one or more locking members 812 between the
locked position and the un-locked position. While front view 802 illustrates the actuator
220 connected with the cams 824 and 826, the manway gate assembly 808 may comprise
manually operated cams. For example, one or more levers may be coupled to the cams
824 and 826 to operate the cams 824 and 826 to rotatably 812 the one or more locking
members between the locked position and the un-locked position.
[0041] Perspective view 806 illustrates the cams 824 and 826 may be linked together via
a rod 828. The rod 828 may be coupled to both the cams 824 and 826 such that cams
824 and 826 are displaced together. For example, the rod 828 may be coupled between
the cams 824 and 826 such that when the linear actuator 220 selectively displaces
the rod 828 in the first linear direction 210, the cams 824 and 826 are rotated in
unison with each other. Further, when the rod 828 is displaced in the first linear
direction 210 the cams 824 and 826 are selectively rotated about the longitudinal
axes 814 of the locking members 812. The manway gate assembly 808 may include one
or more bearing surfaces 830, and the rod 828 may bear on the bearing surfaces 830
when the rod 828 is displaced in the first linear direction 210. For example, when
the rod 828 is selectively actuated in the first linear direction 210 to displace
the gate to the closed position, the rod 828 may be slideably displaced along the
bearing surfaces 830 in the first linear direction 210. As the rod 828 bears on the
bearing surfaces 830 and slides in the first linear direction, the rod 828 selectively
rotates the cams 824 and 826 about the longitudinal axes 814 of the one or more locking
members 812. When the cams 824 and 826 are selectively rotated about the longitudinal
axes 814 of the one or more locking members 812, the one or more locking members 812
rotate between the locked position and the unlocked position. In one example, when
the cams 824 and 826 are selectively rotated about the longitudinal axes 814 of the
one or more locking members 812, the one or more locking members 812 rotate the one
or more cams 822 to bear on the one or more bearing surfaces 820 to apply a biasing
force to the gate 810 perpendicular to the first and second planes to seal the gate
810 to a surface of a tank. The bearing surfaces 830 may comprise a bolt, a pin, a
rolling pin, a smooth plate (e.g., a smooth nylon plate) arranged to cooperate with
the rod 828.
[0042] The manway gate assembly 808 may include one or more stop surfaces 832, that when
the rod 828 is selectively actuated in the first linear direction 210 to displace
the gate to the open position, the rod 828 may bear on the stop surfaces 832. For
example, when the rod 828 is selectively actuated in the first linear direction 210
to displace the gate to the open position, the rod 828 may be displaced on the bearing
surfaces 830 as the gate is displaced in the first linear direction 210 to the open
position. Stated otherwise, the stop surfaces 832 may stop the rod 828 from being
displaced relative to the gate 810 to provide for raising the gate 810 to the open
position. The stop surfaces 832 may comprise a bolt, a pin, a rolling pin, a smooth
plate (e.g., a smooth nylon plate) arranged to come in contact with the rod 828.
[0043] FIG. 9 illustrates a detail view 902 of the cam 824 of the example manway gate assembly
808 shown in the perspective view 806 of FIG. 8 taken at location F. FIG. 9 illustrates
the rod 828 connected to a lever 904. The lever 904 may be pivotably connected to
the rod 828 and the locking member 812. For example, one end of the lever 904 may
be pivotably connected to the rod 828, and the other end of the lever 904 may be pivotably
connected to a lobe 906. The lobe 906 may be irremovably or removably coupled to the
locking member 812. In one example, the lobe 906 may comprise a clamping device. Thus,
when the rod 828 is displaced via a rod 908 of the actuator 222 in the first linear
direction 210, the cam lever 904 displaces (e.g., rotates) the lobe 906, and the lobe
906 displaces (e.g., rotates) the locking member 812. Cam 826 may be similar to cam
824. For example, the rod 828 may be connected to a lever, and the lever may be pivotably
connected the locking member 812. For example, one end of the lever may be pivotably
connected to the rod 828, and the other end of the lever may be pivotably connected
to a lobe.
[0044] FIG. 10 illustrates a detail view 1002 of the locking member 812 of the example manway
gate assembly 808 shown in the front view of FIG. 8 taken at location G. FIG. 10 illustrates
a bearing of one or more bearings 1004 arranged in the frame 816. The bearings 1004
may cooperate with the one or more locking members 812 to provide for displacing (e.g.,
rotating) the one or more locking members 812 about their longitudinal axes 814 between
a locked position and an un- locked position.
[0045] FIG. 11 illustrates a detail view 1102 of the locking member 812 of the example manway
gate assembly 808 shown in the side view of FIG. 8 taken at location H. FIG. 11 illustrates
the cam 822 coupled to the locking member 812. As discussed above, the cam 822 may
bear on the one or more bearing surfaces 820 to displace the gate 810 perpendicular
to the first and second planes to seal the gate 810 to a surface of a tank. For example,
the one or more cams 822 may comprise a lobe portion 1104 (e.g. round projection,
protrusion, bump, etc.) arranged to bear on the bearing surface 820. For example,
when the lobe portion 1104 is displaced (e.g., rotated) in a direction towards the
bearing surface 820, the lobe portion 1104 may come in contact with, and bear on,
the bearing surface 820 to apply a biasing force to the gate 810 in the second linear
direction 218 to tightly press the gate 810 against a gasket (e.g., an elastomeric
seal) thus creating a liquid tight seal. For example, one or more cams 822 of the
one or more rotatable locking members 812 may bear on the one or more bearing surfaces
820 to apply a biasing force to the gate 810 in the direction 218 perpendicular to
the sealing surface of the aperture to seal the gate 810 to the sealing surface of
the aperture in the locked position. Further, the one or more cams 822 may comprise
a planar portion 1106 arranged to not bear on (e.g., be free of contact with) the
bearing surface 820. For example, when the planar portion 1106 is displaced (e.g.,
rotated) in a direction towards the bearing surface 820, the planar portion 1106 may
be arranged parallel with, and be free of contact with the bearing surface 820 to
provide for displacing the gate 810 in the first linear direction 210 between the
open position, the closed position, and/or the intermediate position between the open
position and the closed position.
[0046] FIG. 12 illustrates a detail section view 1202 of the example manway gate assembly
808 shown in the front view 802 of FIG. 8 taken along line I-I. Detail section view
1202 illustrates the manway gate assembly 808 comprising the passageway 610 having
the substantially uniform planar surface 612 that provides for not impeding the flow
of product emptying from the tank 104. The gate 810 may comprise the gasket 226 coupled
to the gate 810 to seal the gate 810 to the sealing surface 222 of the neck 126 in
the locked position.
[0047] FIG. 13 illustrates a detail section view 1302 of the example manway gate assembly
808 shown in the front view 802 of FIG. 8 taken along line J-J. Detail section view
1302 illustrates the cams 824 and 826 connected to the one or more locking members
812 to rotatably displace the one or more locking members 812 between the locked position
and the un-locked position. Detail section view 1302 illustrates the ends of the levers
904 may be pivotably connected to the rods 828, and the other ends of the levers 904
may be pivotably connected to the lobes 906.
Example Method of Using a Manway Gate Assembly
[0048] FIG. 14 illustrates an example method 1400 of closing and locking a tank (e.g., tank
104) via an example manway gate assembly (e.g., manway gate assembly 808). For instance,
this process may be performed to empty and/or clean a self-emptying or self-cleaning
tank, which has a bottom surface (e.g., bottom surface 108) having a nonzero slope
(e.g., non-zero slope 112), which provides for a more efficient removal of pomace
in the bottom of the tank. While FIG. 14 illustrates a method of using an example
manway gate assembly configured to provide a liquid tight seal for a fermentation
tank, this method may apply to using the manway gate assembly with any type of container.
For example, the manway gate assembly may be used with a mash tank, a petroleum tank,
a milk tank, a septic tank, a gas tank, etc.
[0049] Method 1400 may include an operation 1402, which represents selectively sliding a
gate (e.g., gate 810) in a first linear direction (e.g., first linear direction 210).
For example, a user may selectively slide the gate in the first linear direction between
an open position, a closed position, and/or an intermediate position between the open
position and the closed position. A user may selectively slide the gate in the first
linear direction between an open position, a closed position, and/or an intermediate
position between the open position and the closed position to control a flow rate
of product (e.g., pomace) emptying from the tank. The gate may be selectively moved
between the open, closed, and/or an intermediate positions via an actuator (e.g.,
actuator 220). Method 1400 may proceed to operation 1404, which represents selectively
sliding the gate in the first linear direction to the closed position. For example,
subsequent to emptying and/or cleaning the product from the tank, a user may selectively
close the gate to the closed position.
[0050] Method 1400 may be complete at operation 1406, which represents rotatably displacing
one or more locking members (e.g., one or more locking members 812) to a locked position,
where the one or more locking members apply a biasing force to the gate in a second
linear direction (e.g., second linear direction 218) perpendicular to the first linear
direction. For example, a user may selectively rotate the one or more locking members
to apply a biasing force to the gate perpendicular to a first plane adjacent to a
surface of the tank to tightly press the gate against a gasket (e.g., gasket 226)
thus creating a liquid tight seal.
[0051] Further, the invention comprises the following embodiments:
A first embodiment comprises a container comprising: a tank for holding a product
and a gate assembly coupled to the tank, the gate assembly comprising: a gate slideably
disposed in a first plane adjacent to a surface of the tank, the gate to slideably
displace in the first plane along the surface of the tank between an open position
and a closed position; and one or more locking members having a longitudinal axis
movably disposed in a second plane parallel to the first plane, the one or more locking
members being movable between a locked position and an un-locked position, wherein
the one or more locking members apply a biasing force to the gate in a direction perpendicular
to the first and second planes to seal the gate to the surface of the tank in the
locked position.
[0052] In a first preferable variant of the first embodiment, the gate comprises a substantially
planar rectangular shaped plate.
[0053] In a second preferable variant of the first embodiment, the one or more locking members
are rotatable in the second plane parallel to the first plane between the locked position
and the unlocked position. Preferably, the gate assembly further comprises a frame
arranged around the gate, the frame comprising one or more bearing surfaces, and the
one or more rotatable locking members comprising one or more cams to bear on the one
or more bearing surfaces to apply a biasing force to the gate perpendicular to the
first and second planes to seal the gate to the surface of the tank in the locked
position.
[0054] In a third preferable variant of the first embodiment, the one or more locking members
slide in the second plane parallel to the first plane between the locked position
and the un-locked position. Preferably, the gate assembly further comprises a frame
arranged around the gate, the frame comprising one or more apertures to removeably
receive the one or more locking members, the one or more apertures to cooperate with
the one or more locking members to apply a biasing force to the gate perpendicular
to the first and second planes to seal the gate to the surface of the tank in the
locked position.
[0055] A fourth preferable variant of the first embodiment, further comprises a scraper
blade assembly rotatably coupled to a bottom surface of the container to displace
solids deposited on the bottom surface of the container through the gate assembly
when the gate is in the open position and/or an intermediate position between the
open position and the closed position.
[0056] In a fifth preferable variant of the first embodiment, the gate is movable in the
first plane along the surface of the tank to an intermediate position between the
open position and the closed position.
[0057] In a sixth preferable variant of the first embodiment, the container comprises a
fermentation tank.
[0058] A second embodiment comprises a tank comprising: a top surface; a bottom surface
opposite the top surface, the bottom surface having a non-zero slope relative to a
horizontal support surface; a wall coupled to and between the bottom surface and the
top surface; an aperture arranged in the wall of the tank proximate to the lowest
portion of the slope of the bottom surface of the tank, the aperture comprising a
sealing surface; and a manway gate assembly arranged around the aperture through which
to empty a product held in the tank, the manway gate assembly comprising: a gate arranged
adjacent to the sealing surface of the aperture, the gate to selectively slide along
the sealing surface of the aperture between an open position and a closed position;
and one or more locking members rotatably disposed adjacent to the gate, each of the
one or more rotatable locking members to rotate about a longitudinal axis of the respective
one or more rotatable locking member between a locked position and an un-locked position,
wherein the one or more rotatable locking members apply a biasing force to the gate
in a direction perpendicular to the sealing surface of the aperture to seal the gate
to the sealing surface of the aperture in the locked position.
[0059] In a first preferable variant of the second embodiment, the manway gate assembly
further comprises a frame arranged around the gate, the frame comprising one or more
bearing surfaces, and wherein the one or more rotatable locking members include one
or more cams to bear on the one or more bearing surfaces to apply a biasing force
to the gate in the direction perpendicular to the sealing surface of the aperture
to seal the gate to the sealing surface of the aperture in the locked position.
[0060] In a second preferable variant of the second embodiment, the manway gate assembly
further comprises: a linear actuator coupled to the frame and to the gate, the linear
actuator to selectively slide the gate between the open position, the closed position,
and/or an intermediate position between the open position and the closed position.
[0061] In a third preferable variant of the second embodiment, the manway gate assembly
further comprises a linkage connected to the one or more locking members to rotate
the one or more rotatable locking members between the locked position and the un-locked
position.
[0062] A fourth preferable variant of the second embodiment, further comprises a blade rotatably
coupled to the bottom surface of the tank to displace solids deposited on the bottom
surface of the tank through the gate when the gate is in the open position or an intermediate
position between the open position and the closed position.
[0063] A third embodiment comprises a manway sliding gate assembly comprising: a gate to
selectively slide in a first linear direction between an open position and a closed
position; and one or more locking members movably arranged adjacent to the gate, the
one or more locking members being movable between a locked position and an un-locked
position, wherein in the locked position the one or more locking members apply a biasing
force to the gate in a second linear direction perpendicular to the first linear direction.
[0064] In a first preferable variant of the third embodiment, each of the one or more locking
members is rotatable about a longitudinal axis of the respective one or more locking
members between the locked position and the un-locked position.
[0065] In a second preferable variant of the third embodiment, the manway gate assembly
further comprises a frame arranged around the gate, the frame comprising one or more
bearing surfaces, and the one or more locking members comprising one or more cams
to bear on the one or more bearing surfaces to apply a biasing force to the gate in
the second linear direction perpendicular to the first linear direction. Preferably,
the manway gate assembly further comprises: a linkage connected to the one or more
locking members to rotate the one or more locking members between the locked position
and the un-locked position. Even more preferred, the manway gate assembly further
comprises: an actuator connected with the linkage connected to the one or more locking
members to rotate the one or more locking members between the locked position and
the un-locked position.
[0066] In a third preferable variant of the third embodiment, the one or more locking members
adjacent to the gate are slideable between the locked position and the un-locked position.
[0067] A fourth preferable variant of the third embodiment is a manway sliding gate assembly
of the third preferable variant of the third embodiment, wherein the manway gate assembly
further comprises a frame arranged around the gate, the frame comprising one or more
apertures to receive the one or more locking members, the one or more apertures to
cooperate with the one or more locking members to apply a biasing force to the gate
in the second linear direction perpendicular to the first linear direction.
[0068] A fifth preferable variant of the third embodiment is a manway sliding gate assembly
of the fourth preferable variant of the third embodiment, wherein the manway gate
assembly further comprises: a cam coupled to the gate and connected to the one or
more locking members to slideably displace the one or more locking members between
the locked position and the un-locked position.
[0069] A sixth preferable variant of the third embodiment is a manway sliding gate assembly
of the fifth preferable variant of the third embodiment, wherein the manway gate assembly
further comprises: an actuator connected with the cam coupled to the gate and connected
to the one or more locking members to slideably displace the one or more locking members
between the locked position and the un-locked position.
[0070] A seventh preferable variant of the third embodiment is a manway sliding gate assembly
of the sixth preferable variant of the third embodiment, wherein the manway gate assembly
further comprises: one or more sleeves coupled to the gate to slideably receive the
one or more locking members.
Conclusion
[0071] Although the invention has been described in language specific to structural features
and/or methodological acts, it is to be understood that the invention is not necessarily
limited to the specific features or acts described. Rather, the specific features
and acts are disclosed as illustrative forms of implementing the invention. For example,
while embodiments are described having certain shapes, sizes, and configurations,
these shapes, sizes, and configurations are merely illustrative.