[0001] This invention relates to a safety device for a draining filter of a washing machine.
[0002] In particular, this safety device prevents the occurrence of malfunctions and breakages
due to the introduction of metal objects into the loading drum of the washing machine.
[0003] The invention also relates to an draining filter for a washing machine configured
so as to also prevent the occurrence of malfunctions or breakages due to the introduction
of metal objects into the loading drum of the washing machine.
[0004] Normally, washing machines are equipped with a loading drum to receive the clothes
to be washed, which is connected, through one or more conduits, to a draining pump
designed to suck from the drum the draining water produced by each washing cycle.
[0005] The draining pump is commonly associated with a draining filter that performs the
specific function of protecting it from the accumulation of hair or lint and other
solid elements that could be contained in the draining water coming from the washing
machine drum.
[0006] There is also an additional pipe or conduit from the draining filter, that is, from
the draining pump, for connection to the domestic wastewater system.
[0007] Although reference is made in the description of the invention to a domestic washing
machine, the same should in no way be considered limited to domestic use only, as
it can be extended also to washing machines intended for other uses, for example for
industrial use.
[0008] Various types of draining filters for washing machines are known.
[0009] Traditional draining filters for washing machines do not allow, however, the avoidance
of possible risks of breakages and malfunctions of the washing machine caused by the
insertion of metal objects inside the washing machine itself.
[0010] In fact, during the washing machine loading operation, trousers or other garments
may, inadvertently, be inserted into the washing machine drum containing, in the relative
pockets, metal objects such as coins, hairpins, screws, nails, etc.
[0011] During washing, these metal objects could escape from the parts of the garments where
they are located and travel along the entire connection conduit provided between the
drum and the draining filter, and from the latter continue towards the draining pump
for the washing machine or towards the conduit that connects the draining filter to
the domestic wastewater system.
[0012] Traditional draining filters for washing machines are, in many cases, ineffective
in filtering, that is to say, blocking, metal objects, allowing them to continue their
travel downstream of the draining filter.
[0013] The above-mentioned metal objects, if they were to reach the draining pump, could
cause instantaneous breakage or malfunctions that could lead, subsequently, to the
breakage of the pump itself.
[0014] Otherwise, if the above-mentioned metal objects were to enter the domestic wastewater
system, they could form obstructions, particularly in the areas of this system where
corner fittings or curved elements are provided, with the consequent need to remove
the obstructions thus formed.
[0015] The aim of the invention is to overcome the above-mentioned problems of the prior
art.
[0016] Another aim of the invention is to provide a safety device for a draining filter
for a washing machine which avoids possible risks of malfunctions or breakages of
the draining pump for the washing machine due to the introduction of metal objects
in the loading drum of the latter.
[0017] Another aim of the invention is to provide a safety device for a draining filter
for a washing machine which is effective and reliable in performing the function for
which it is intended.
[0018] Another aim of the invention is to provide a safety device for a draining filter
for a washing machine which is easy to assemble and use.
[0019] Another aim of the invention is to provide a safety device for a draining filter
for a washing machine, which is particularly economical with respect to the results
practically achievable with it.
[0020] A further aim of the invention to provide a draining filter for a washing machine
which prevents the occurrence of malfunctions or breakages due to the introduction
of metal objects into the loading drum of the washing machine.
[0021] A further aim of the invention is to provide a draining filter for a washing machine
which is effective and reliable in performing the function of preventing malfunctions
or breakages due to the introduction of metal objects into the loading drum of the
washing machine.
[0022] It is, therefore, a specific object of the present invention a safety device for
a draining filter for a washing machine comprising a drum for receiving garments or
other elements to be washed and a draining pump for draining at least one washing
liquid from said drum, wherein said draining filter is mountable to said washing machine
in such a way as to be in fluid communication with said drum and said draining pump,
and wherein said safety device comprises: at least one magnetic element for attracting,
in use, at least one metal object which is in a washing liquid which is pumped by
said draining pump from said drum to said draining filter when the safety device is
connected with the draining filter and said draining filter is mounted to said washing
machine; and connecting means for connecting, in use, the safety device with the draining
filter.
[0023] Advantageously according to the present invention, said connecting means can be configured
to connect, in use, the safety device with the draining filter in a removable way.
[0024] Preferably according to the invention, said safety device comprises a first member
and a second member which are connectable with each other in a removable way by removable
connection means and which are configured in such a way as to achieve the connection
of the safety device with the draining filter by connecting said first member and
said second member with each other.
[0025] Profitably according to the invention, said first member and said second member,
when connected with each other, can jointly define a through hole for receiving, in
use, at least one part of said draining filter such that said at least one part of
said draining filter is trapped in said through hole by said first member and said
second member which are connected with each other.
[0026] Further according to the invention, said removable connection means can comprise
anchoring means and hook means which are configured to engage with said anchoring
means in a removable way.
[0027] Alternatively according to the invention, said safety device can comprise: a first
member; a second member which is connected to the first member in a rotatable way
about a rotation axis by rotatable connection means; and removable connection means
for connecting to each other, in a removable way, at least one portion of said first
member and at least one portion of said second member; wherein said first member and
said second member are configured in such a way as to achieve the connection of the
safety device with the draining filter by connecting to each other said at least one
portion of the first member and said at least one portion of the second member by
said removable connection means.
[0028] Preferably according to the invention, when said at least one portion of the first
member and said at least one portion of the second member are connected to each other
by said removable connection means, said first member and said second member jointly
define a through hole for receiving, in use, at least one part of said draining filter,
such that said at least one part of said draining filter is trapped in said through
hole by said first member and said second member.
[0029] Profitably according to the invention, said removable connection means can comprise
anchoring means and hook means which are configured to engage with said anchoring
means in a removable way.
[0030] Advantageously according to the invention, said safety device can comprise coating
means made of a thermoplastic polymeric material to entirely coat said at least one
magnetic element.
[0031] Preferably according to the invention, said coating means comprise a hollow body,
wherein a cavity is defined for accommodating said at least one magnetic element,
and a cover element for completely closing said cavity.
[0032] It is a further object of the present invention a draining filter for a washing machine
comprising a drum for receiving garments or other elements to be washed and a draining
pump for draining at least one washing liquid from said drum, wherein said draining
filter is mountable to said washing machine in such a way as to be in fluid communication
with said drum and said draining pump and comprises at least one magnetic portion
or magnetic element, which is integrally incorporated in said draining filter, to
attract, in use, at least one metal object which is in a washing liquid which is pumped
by said draining pump from said drum to said draining filter when said draining filter
is mounted to said washing machine.
[0033] Preferably according to the present invention, said at least one magnetic portion
or said magnetic element is coated by a layer of thermoplastic polymeric material.
[0034] Further according to the invention, said draining filter can comprise connection
means for the removable connection with said draining pump.
[0035] Features and advantages will be highlighted in more detail by the following description
of preferred but not exclusive embodiments illustrated, purely by way of non-limiting
example, in the accompanying drawings, in which:
- Figure 1 is a perspective view of a safety device according to a first embodiment
of the invention, for a draining filter for a washing machine, according to a non-assembled
configuration of the safety device;
- Figure 2 is a further perspective view of the safety device illustrated in Figure
1, in the same non-assembled configuration;
- Figure 3 is a perspective view of the same safety device shown in Figures 1 and 2,
but in an assembled configuration;
- Figure 4 is a further perspective view of the safety device shown in Figure 3, in
the same assembled configuration;
- Figure 5 is an exploded view of the safety device shown in Figures 1 and 2;
- Figure 6 shows a draining pump for a washing machine and a draining filter on which
the safety device shown in Figures 1-5 is about to be mounted;
- Figure 7 is identical to Figure 6, except that in Figure 7 the safety device is mounted
on the draining filter;
- Figure 8 shows the above-mentioned draining pump with, coupled, the above-mentioned
draining filter, on which is mounted - although it is not visible - the safety device
shown in Figures 1-5;
- Figure 9 is a perspective view of a safety device according to a second embodiment
of the invention, for a draining filter for a washing machine, according to an open
configuration of the safety device;
- Figure 10 is a further perspective view of the safety device illustrated in Figure
9, in the same open configuration;
- Figure 11 is a perspective view of the safety device shown in Figures 9 and 10, but
in a closed configuration;
- Figure 12 is a further perspective view of the safety device shown in Figure 11, in
the same closed configuration;
- Figure 13 shows a first draining filter according to the invention, for a washing
machine;
- Figure 14 shows a second draining filter according to the invention, for a washing
machine;
- Figure 15 shows a third draining filter according to the invention, for a washing
machine; and
- Figure 16 shows a fourth raining filter according to the invention, for a washing
machine.
[0036] With reference to the accompanying drawings, a first safety device according to the
invention is denoted in its entirety with the numeral 1, for a draining filter for
a washing machine.
[0037] In particular, the first safety device 1 comprises a capturing member 2, for capturing
metal objects located in the vicinity thereof, and an anchoring member 3 which can
be coupled in a removable fashion to the capturing member 2 to allow the connection
of the first safety device 1 to a draining filter for a washing machine.
[0038] The capturing member 2 and the anchoring member 3 can be made of any thermoplastic
polymeric material, preferably of a plastic or rubbery material that cannot be damaged
and worn by the drainage water of the washing machines, that is by the water produced
by the washing of clothes.
[0039] The capturing member 2 comprises, in turn, a hollow body 4 with a curved shape, inside
which a cavity 5 leading out through an opening 6 is formed.
[0040] The same capturing member 2 also includes a cap 7 which can be coupled in a removable
fashion to the hollow body 4 at the opening 6, in such a way as to completely cover
the latter and hermetically close the cavity 5 when the cap 7 itself is coupled to
the hollow body 4.
[0041] If necessary, a gasket or a sealing element can be further provided on the side of
the cap 7 intended to face the cavity 5 of the hollow body 4 or on the perimeter edges
of the opening 6 to prevent any possibility of liquid entering the cavity 5.
[0042] A first outer face 8 and, opposite to it, a second outer face 9 are defined in the
hollow body 4 from which project, respectively, in opposite directions, a first pair
of anchoring pins 10a, 10b and a second pair of anchoring pins 11a, 11b.
[0043] The capturing member 2 further comprises one or more magnets 12a, 12b, 12c each having
the shape of a disc and sized in such a way that they can be inserted into the cavity
5 of the hollow body 4 from the relative opening 6 and contained therein by mounting
the cap 7 on the hollow body 4.
[0044] According to variant embodiments of the invention, said one or more magnets 12a,
12b, 12c may have shapes different from the one indicated above and shown in the accompanying
drawings, such as for example a crescent shape.
[0045] The anchoring member 3 is, on the other hand, a shaped element provided with a first
pair of coupling portions 13a, 13b and a second pair of coupling portions 14a, 14b
respectively positioned at a first side 15 and a second side 16 of the anchoring member
3, wherein said first 15 and second 16 sides are mutually opposite.
[0046] In particular, the above-mentioned first pair of coupling portions 13a, 13b and second
pair of coupling portions 14a, 14b are positioned and configured in such a way as
to be able to attach, respectively, in a snap-on and removable fashion, to the first
pair of anchoring pins 10a, 10b and to the second pair of anchoring pins 11a, 11b
when the capturing member 2 and the anchoring member 3 are brought closer to each
other.
[0047] Furthermore, the capturing member 2 and the anchoring member 3 are shaped in such
a way as to form between them, when they are mutually coupled, a through hole 17 leading
to a first side of the first safety device 1, where the first outer face 8 of the
capturing member 2 and the first side 15 of the anchoring member 3 are located, and
to a second side of the same first safety device 1, where the second outer face 9
of the capturing member 2 and the second side 16 of the anchoring member 3 are present.
[0048] The function of the through hole 17 will be described in detail below.
[0049] In order to achieve the mutual separation of the capturing member 2 and the anchoring
member 3 it is sufficient, on the other hand, to apply to them opposite forces of
such intensity as to overcome the resistance produced by the coupling between the
first pair of coupling portions 13a, 13b and the first pair of anchoring pins 10a,
10b and between the second pair of coupling portions 14a, 14b and the second pair
of anchoring pins 11a, 11b.
[0050] On the other hand, Figures 6-8 show how to apply the first safety device 1 to a draining
filter 18 of a draining pump 19 for a washing machine.
[0051] The draining pump 19 comprises a hollow main body 20 in which a chamber 21 is defined
that leads out through an opening 22 and is intended to receive the draining filter
18.
[0052] In the hollow main body 20, at the opening 22, a lead nut and screw 23 is also formed
to allow removable coupling with the draining filter 18.
[0053] In the hollow main body 20 there are also a first coupling 24 and a second coupling
25, both in fluid communication with the chamber 21 and respectively intended to allow
hydraulic connection with the loading drum (not illustrated) of the washing machine
and with the domestic wastewater system (not illustrated).
[0054] The draining pump 19 also includes an operating unit 26, which in turn includes a
motor (not visible) and an impeller (not visible) driven by said motor and housed
in a relative seat (not visible) that is in fluid communication with the chamber 21.
[0055] The draining filter 18 comprises, on the other hand, a threaded end portion 27 configured
in such a way as to be able to engage with the above-mentioned lead nut and screw
23 when the draining filter 18 is inserted into the chamber 21 of the draining pump
19.
[0056] From the threaded end portion 27 extend, from the same side and in parallel directions,
a first lateral arm 28, a second lateral arm 29, arranged in a position diametrically
opposite to that of the first lateral arm 28, and a central stem 30 located in an
axial position between the above-mentioned lateral arms 28, 29.
[0057] The draining filter 18 also includes a second end portion 31 joined to the above-mentioned
side arms 28, 29 and, possibly, also to the central stem 30.
[0058] A central opening 32 formed at the central stem 30 is provided in said second end
portion 31 in order to place in fluid communication the seat in which the above-mentioned
impeller is housed with the zone of the draining filter 18 located between the threaded
end portion 27 and said second end portion 31 and therefore also with the chamber
21 of the draining pump 19.
[0059] The central opening 32 of the second end portion 31 and the central stem 30 jointly
define a passage 32' having substantially the shape of a circular crown and reduced
dimensions to prevent objects larger than the passage 32' from reaching the seat where
the above-mentioned impeller of the operating unit 26 is located when the draining
filter 18 is inserted in the chamber 21 of the draining pump 19.
[0060] The application of the first safety device 1 to the draining filter 18 must be carried
out before proceeding with the insertion of the latter into the chamber 21 of the
draining pump 19.
[0061] In particular, as shown in Figures 6 and 7, in order to apply the first safety device
1 to the draining filter 18, it is necessary to mutually couple the capturing member
2 and the anchoring member 3 by coupling the first 13a, 13b and the second 14a, 14b
pair of coupling portions, respectively, to the first 10a, 10b and to the second 11a,
11b pair of anchoring pins, in such a way that the central stem 30 of the draining
filter 18 remains trapped in the above-mentioned through hole 17 of the first safety
device 1.
[0062] When the first safety device 1 is applied to the draining filter 18 and the latter
is inserted in the chamber 21 of the draining pump 19, when the washing program of
the washing machine provides for the draining of the washing water from the relative
drum, the operating unit 26 of the draining pump 19 starts operating by pumping the
washing water from the drum of the washing machine to the domestic wastewater system.
[0063] For this reason, when the operating unit 26 is activated, the washing water will
initially travel along the connection pipe between the drum and the first coupling
24 of the draining pump 19 and then pass through the chamber 21 where the draining
filter 18 is present and then travel along the entire connection pipe provided between
the second coupling 25 of the draining pump 19 and the domestic wastewater system.
[0064] If the washing water leaving the drum contains metal objects, these, once they reach
the chamber 21 of the draining pump 19, would be captured by the capturing member
2, remaining attached to the latter due to the force of attraction produced by the
magnets 12a, 12b, 12c.
[0065] In this way, such metal objects would then be prevented from reaching the impeller
of the operating unit 26 by passing through the central opening 32 of the draining
filter 18, and from entering the domestic wastewater system by passing through the
connection pipe provided between the second coupling 25 of the draining pump 19 and
said system.
[0066] In order to clean the draining filter 18, it will simply be necessary to extract
it from the chamber 21 of the draining pump 19 and manually remove the metal objects
magnetically attracted by the first safety device 1.
[0067] With reference to Figures 9-12, the reference numeral 1' denotes in its entirety
a second safety device in accordance with the invention, which differs from the first
safety device 1 described above only in that instead of the above-mentioned coupling
portions 13b, 14b (shown in Figures 1-4) there are respectively provided, in the anchoring
member 3', a first eyelet 13b' and a second eyelet 14b' coaxial with each other and
respectively engaged with the two mutually opposite anchoring pins 10b', 11b' of the
capturing member 2' rotatably around an axis of rotation R' passing through the centres
of said two anchoring pins 10b', 11b'.
[0068] Specifically, the above-mentioned two anchoring pins 10b', 11b' occupy, respectively,
the through holes of the first eyelet 13b' and the second eyelet 14b', thus ensuring
that the capturing member 2' and the anchoring member 3' remain constantly connected
to each other.
[0069] By rotating the anchoring member 3' around the axis of rotation R' according to a
first direction C 'from the relative open position shown in Figures 9 and 10, the
same anchoring member 3' can be brought into the relative closed position shown in
Figures 11 and 12, in which the two coupling portions 13a', 14a' are respectively
engaged, that is, coupled, to the other two anchoring pins 10a', 11a'.
[0070] When the anchoring member 3' is in the above-mentioned closed position, it defines,
together with the capturing member 2', a through hole 17'.
[0071] From this closed position, it will also be possible to return the anchoring member
3' to the relative open position (see Figures 9 and 10) by applying to it a force
such as to determine the disengagement, that is, the release, of the two coupling
portions 13a', 14a' from the relative anchoring pins 10a', 11a' and then rotating
the same anchoring member 3' around the axis of rotation R' according to a second
direction A' opposite to the above-mentioned first direction C'.
[0072] In order to apply the second safety device 1' to the above-mentioned draining filter
18, it will therefore be necessary to position in advance the anchoring member 3'
in the relative open position (see Figures 9 and 10) and subsequently bring it into
the closed position (see Figures 11 and 12) so that the central stem 30 of the draining
filter 18 remains trapped in the through hole 17' between the capturing member 2'
and the anchoring member 3'.
[0073] Figures 13-16 on the other hand, show, respectively, a first 33, a second 34, a third
35 and a fourth 36 draining filter, for washing machines, according to four possible
embodiments of the invention.
[0074] In particular, the above-mentioned first 33, second 34, third 35 and fourth 36 draining
filters are equal to the draining filter 18 described above, except for incorporating
a magnetic portion, that is, a magnetic element, coated externally with a layer of
thermoplastic polymeric material to prevent the magnetic portion, that is, magnetic
element, from coming into direct contact with the washing water coming from the washing
machine drum when the draining of said water by the draining pump is arranged.
[0075] Specifically, the first draining filter 33 shown in Figure 13 includes a magnetic
portion 37, or a magnetic element, at the transition zone between the threaded end
portion 38 and the central stem 39.
[0076] On the other hand, the second draining filter 34 illustrated in Figure 14 comprises
a magnetic portion 40, or a magnetic element, in the relative central stem 41.
[0077] Otherwise, the third draining filter 35 shown in Figure 15 comprises two magnetic
portions 42, 43, or two magnetic elements, respectively located in the two side arms
44, 45.
[0078] Lastly, in the fourth draining filter 36 referred to in Figure 16, a magnetic portion
46, or a magnetic element, is provided in the second end portion 47.
[0079] If the draining filters 33, 34, 35, 36 according to the invention are used, any metal
objects present in the washing water would remain attached to the magnetic portion
or the magnetic element of the draining filter.
[0080] Clearly, it is not necessary to apply the safety devices 1, 1' described above to
the above-mentioned draining filters 33, 34, 35, 36, since these filters are already
provided with a magnetic portion or a magnetic element to attract metal objects.
[0081] As can be seen from the foregoing description, the safety devices 1, 1' and the draining
filters 33, 34, 35, 36 according to the invention prevent the metal objects present
in the loading drum from causing malfunctions or breakages in the washing machine
and damage to the wastewater system to which the washing machine itself is connected.
[0082] The above description is only given by way of a non-limiting example, so any constructional
variants fall within the protection of the invention, as described above and claimed
below.
1. Safety device (1; 1') for a draining filter (18) for a washing machine comprising
a drum for receiving garments or other elements to be washed and a draining pump (19)
for draining at least one washing liquid from said drum, wherein said draining filter
(18) is mountable to said washing machine in such a way as to be in fluid communication
with said drum and said draining pump (19), and wherein said safety device (1; 1')
comprises:
- at least one magnetic element (12a, 12b, 12c) for attracting, in use, at least one
metal object which is in a washing liquid which is pumped by said draining pump (19)
from said drum to said draining filter (18) when the safety device (1; 1') is connected
with the draining filter (18) and said draining filter (18) is mounted to said washing
machine; and
- connecting means for connecting, in use, the safety device (1; 1') with the draining
filter (18);
characterized in that said connecting means are configured to connect, in use, the safety device (1; 1')
with the draining filter (18) in a removable way.
2. Safety device (1) according to claim 1, characterized in that it comprises a first member (2) and a second member (3) which are connectable with
each other in a removable way by removable connection means (10a, 10b, 11a, 11b, 13a,
13b, 14a, 14b) and which are configured in such a way as to achieve the connection
of the safety device (1) with the draining filter (18) by connecting said first member
(2) and said second member (3) with each other.
3. Safety device (1) according to claim 2, characterized in that said first member (2) and said second member (3), when connected with each other,
jointly define a through hole (17) for receiving, in use, at least one part of said
draining filter (18) such that said at least one part of said draining filter (18)
is trapped in said through hole (17) by said first member (2) and said second member
(3) which are connected with each other.
4. Safety device (1) according to claim 2 or 3, characterized in that said removable connection means comprise anchoring means (10a, 10b, 11a, 11b) and
hook means (13a, 13b, 14a, 14b) which are configured to engage with said anchoring
means (10a, 10b, 11a, 11b) in a removable way.
5. Safety device (1') according to claim 1,
characterized in that it comprises:
- a first member (2');
- a second member (3') which is connected to the first member (2') in a rotatable
way about a rotation axis (R') by rotatable connection means (10b', 11b', 13b', 14b');
and
- removable connection means (10a', 11a', 13a', 14a') for connecting to each other,
in a removable way, at least one portion of said first member (2') and at least one
portion of said second member (3');
wherein said first member (2') and said second member (3') are configured in such
a way as to achieve the connection of the safety device (1') with the draining filter
(18) by connecting to each other said at least one portion of the first member (2')
and said at least one portion of the second member (3') by said removable connection
means (10a', 11a', 13a', 14a').
6. Safety device (1') according to claim 5, characterized in that when said at least one portion of the first member (2') and said at least one portion
of the second member (3') are connected to each other by said removable connection
means (10a', 11a', 13a', 14a'), said first member (2') and said second member (3')
jointly define a through hole (17') for receiving, in use, at least one part of said
draining filter (18), such that said at least one part of said draining filter (18)
is trapped in said through hole (17') by said first member (2') and said second member
(3').
7. Safety device (1') according to claim 5 or 6, characterized in that said removable connection means comprise anchoring means (10a', 11a') and hook means
(13a', 14a') which are configured to engage with said anchoring means (10a', 11a')
in a removable way.
8. Safety device (1; 1') according to any one of preceding claims, characterized in that it comprises coating means (4, 7) made of a thermoplastic polymeric material to entirely
coat said at least one magnetic element (12a, 12b, 12c).
9. Safety device (1; 1') according to claim 8, characterized in that said coating means comprise a hollow body (4), wherein a cavity (5) is defined for
accommodating said at least one magnetic element (12a, 12b, 12c), and a cover element
(7) for completely closing said cavity (5).
10. Draining filter (33, 34, 35, 36) for a washing machine comprising a drum for receiving
garments or other elements to be washed and a draining pump for draining at least
one washing liquid from said drum, wherein said draining filter (33, 34, 35, 36) is
mountable to said washing machine in such a way as to be in fluid communication with
said drum and said draining pump and comprises at least one magnetic portion or magnetic
element, which is integrally incorporated in said draining filter (33, 34, 35, 36),
to attract, in use, at least one metal object which is in a washing liquid which is
pumped by said draining pump from said drum to said draining filter (33, 34, 35, 36)
when said draining filter (33, 34, 35, 36) is mounted to said washing machine.
11. Draining filter (33, 34, 35, 36) according to claim 10, characterized in that said at least one magnetic portion or said magnetic element is coated by a layer
of thermoplastic polymeric material.
12. Draining filter (33, 34, 35, 36) according to claim 10 or 11, characterized in that it comprises connection means for the removable connection with said draining pump.