Technical field
[0001] The present invention relates to a spacer arranged for supporting and positioning
a construction element at a distance from a support surface. This type of solution
often is called "floating floor", where the floor is arranged on spacers positioned
on a support structure like a floor joist.
Technical background
[0002] Spacers used at floorboards or floor joists are known and so-called floating floors
are used for example when installations like ventilation, water pipes, electrical
cables and the like must be positioned below the floor, or if the supporting floor
is uneven or sloping and needs to be adjusted. Other applications may also be applicable
for spacers arranged for supporting and positioning of the construction element relative
a support surface. One aspect of this type of floor may be sound attenuation, for
example the possibility of dampening sound from steps or other noise caused by an
object hitting the floor. For this purpose, the spacers may be equipped with elastic
dampers at their lowermost end or foot, which faces the support structure. These dampers
may be of different kinds, where for example one is small enough to pass a through
a hole in the construction element (floorboard). This type has problems which are
associated with the small dimension of the damper. If the resilient material is too
hard, vibrations will propagate through it, and the damping effect will be insufficient.
If a softer material is used as resilient material, it might be too easily deformed,
since the pressure on the damper is too great, due to the small dimension. To solve
the latter problem, another type of damper which is considerably larger, is used to
reduce the pressure on the damper and to make it possible to use a softer material.
But such a damper cannot pass through the hole in the construction element, which
means that the spacer and damper must be mounted on the underside of the building
element, which can be difficult. This solution is used in
SE 525 035 C2, where a spacer comprises a support foot with a resilient material positioned under
the foot and which spacer has a first engaging means, by means of which it is attachable
in a construction element, and that a spacer screw and the support foot have corresponding
engaging means by which the spacer screw is fastened on the support foot. This solution
provides a way of easy positioning of a dampening support foot to the spacer, wherein
the spacer enables support for the construction element as well a fairly good sound
attenuation.
[0003] There is still a problem with today solutions regarding sound attenuation, since
either the sound dampening material is not large enough depending on the solution,
or that there still is a possibility that unwanted noise, from for example persons
walking on the construction element (floor), is transferred to another location, like
a lower floor or an adjacent premises, via the connection between the spacer screw
and the construction element.
Summary of the invention
[0004] One object of the present invention is to provide a spacer which solves the above-described
problems, which are solved by a spacer according to the independent claim 1.
[0005] According to an aspect a spacer for supporting and positioning a construction element,
like a floorboard, a floor joist, or the like, at a distance from a support surface
is disclosed. Relating to a using position of the spacer as a support of the construction
element on the support surface, the spacer has an axial extension in a vertical direction.
The spacer comprises a positioning means, arranged for positioning of the spacer relative
a hole in the construction element, wherein the positioning means comprises first
engagement means which are arranged to engage with a side of the hole of the construction
element. The spacer further comprises an elongate spacer screw which extends in the
vertical direction, wherein the spacer screw comprises an upper end and an opposite
lower end, and an external first thread, which extends at least a part of a distance
between the upper end and the lower end. Further, the spacer comprises a support foot
which is intended for abutment against the support surface. The support foot is arranged
at the second end of the spacer screw, preferably by that the support foot and the
spacer screw comprises mutually corresponding engagement means by means of which the
spacer screw is fixable in or on the support foot. Of course, the support foot can
be a part of the spacer screw and it may also be arranged as an end of the spacer
screw which may be arranged as to abut the support surface. The spacer further comprises
a support means, which comprises an internal second thread, which is in threaded connection
with the external first thread of the spacer screw, wherein the distance between the
construction element and the support foot is adjustable by rotation of the spacer
screw in/relative the support means. By that, the support means is positioned/may
be positioned relative the positioning means in the using position of the spacer.
Further, at least one first resilient bushing is arranged between at least one of
the construction element or the positioning means and the support means. This means
that the resilient bushing is arranged between the construction element and the support
means, or between the positioning means and the support means or between both the
construction element and the positioning means and the support means. Further this
means that the weight of the construction element as well as forces subjected to the
construction element are transferred from the construction element to the positioning
means and further via the resilient bushing to the support means, since the resilient
bushing is in contact with the support means and at least one of the construction
element or the positioning means.
[0006] Such a solution provides a sound attenuation at the "source", i.e. at the location
where the sound/noise is transferred from the construction element/the floor to the
spacer. Thereby, the "sound bridge" is broken by means of the resilient bushing, which
is positioned either directly between the construction element and the support means
of the spacer or between the positioning means and the support means of the spacer.
The positioning means is engaged with the construction element and the support means
is positioned relative the positioning means either directly or via the spacer screw,
wherein the support means takes care of forces from the construction element and transfers
them to the spacer screw after being dampened by the first resilient bushing. This
solution thereby dampens (isolates) the spacer screw from the construction element
already at the level of the construction element which eliminates sound transfer better
than existing solutions.
[0007] According to an embodiment, the positioning means and the support means are of stiffer
material than the at least one first resilient bushing. The support means and the
positioning means have the function of providing a robust enough connection between
the spacer screw and the construction element, why the must be sufficiently stiff,
while the function of the resilient bushing is to take care of (dampening) the sound
which otherwise could be transferred between the positioning means connected to the
construction element and the support means connected to the spacer screw.
[0008] According to an embodiment, the positioning means and the support means are made
of some kind of plastic material and the at least one first resilient bushing is made
of rubber. Other more or less resilient materials may also be used.
[0009] According to an embodiment, the first engagement means of the positioning means has
at least one upper first flange arranged to grip around edges of the hole of the construction
element. This solution provides a grip such as the positioning means "stays in place"
in and relative the hole in the construction element and the flange may rest on the
upper surface of the construction element or more preferred be integrated in the construction
element by a shallow or semi-shallow cut-out of the uppermost top surface around the
hole in the construction element. By that, the flange does not protrude above the
top surface of the construction element.
[0010] An alternative compared to the latter might be to skip an upper flange and instead
only introduce the positioning means into the hole of the construction element where
it is kept in place by its form or by other engagement means which engages with sides
of the hole. For example, the hole as well as the positioning means may have corresponding
shape, for example be circular, square, hexagon-shaped etc. and the positioning means
be very tight fit into the hole.
[0011] According to an embodiment, the positioning means comprises a second flange arranged
to abut an underside of the construction element, wherein the second flange extends
transverse the vertical direction (i.e. outwards in direction away from the engagement
means of the positioning means). This second flange supports the construction element,
which rest on top of the second flange and the weight of the construction element
and forces subjected the same are transferred to the second flange of the positioning
means and further to the support means via the resilient bushing. By the second flange,
a specified and larger area is available for the force to be transferred and a larger
bushing may be used, which is positive for the resilient bushing concerning choice
of material (softer and more dampening) and also concerning lifetime of the same.
[0012] According to an embodiment, the second flange of the positioning means comprises
a first side part which projects away from the construction element towards the support
foot, in the using position, and the support means further comprises a bottom part,
wherein the internal second thread of the support means extends through the bottom
part, perpendicular relative the bottom part, wherein the at least one first resilient
bushing is arranged between the bottom part of the support means and the second flange
of the positioning means. Such a solution provides a safe keeping of the resilient
bushing between the bottom part of the support means and the second flange of the
positioning means wherein the first side part of the positioning means contributes
to the "keeping" of the bushing. Further, such solution transfers the force and the
weight of the construction element via the second flange of the positioning means
and further via the resilient bushing to the bottom part of the support means. The
force is further transferred via the second internal thread arranged in the bottom
part of the support means, to the external first thread of the spacer screw and further
via the foot to the support surface.
[0013] According to an embodiment, the bottom part of the support means comprises a second
side part which projects away from the bottom part, towards the construction element,
in the using position, wherein the first side part of the positioning means comprises
first connecting means and the second side part of the support means comprises second
connecting means. The second side part of the support means is thereby connectable
to the first side part of the positioning means, by means of the first and second
connecting means. Preferably, the support means may move a distance relative the positioning
means in the vertical direction (relating to the using position of the spacer) by
that the second connecting means of the support means is movable along and above the
first connecting means of the positioning means. For example, the first and second
connecting means are mutually corresponding snap connections where one snaps relative
the other, for example as two projections, where the first connections means may be
a groove or a thinner part of the first side part of the positioning means. This enables
a possible sliding motion of the support means relative the positioning means in their
connected state wherein a certain movement is allowed due to the fact that the bushing
is resilient.
[0014] According to an embodiment, the spacer further comprising at least one second resilient
bushing arranged between the first engagement means of the positioning means and the
spacer screw for guiding of the spacer screw when the spacer screw extends into the
hole of the construction element. When the construction element is adjusted, the upper
end of the spacer screw might extend into the hole of the construction element, wherein
the second resilient bushing guides (centers) the spacer screw in the hole as well
as taking care of (dampening) eventual contact noise occurred by contact between spacer
screw and positioning means, or airborne noise which otherwise might be transferred
via a gap around the spacer screw.
[0015] According to an embodiment, the positioning means, the support means and the at least
one first resilient bushing are vulcanized to one unit. This is a simple and cost-efficient
solution where the dampening function is achieved at the level of the construction
element.
[0016] According to an embodiment, the support foot of the spacer comprises at least one
third resilient bushing, arranged at a side of the support foot which faces the support
surface and which at least one third resilient bushing is intended for abutment against
the support surface. This third resilient bushing may of course be used with all other
embodiments presented above and a solution with this third resilient bushing together
with the first resilient bushing gives a double sound attenuation and vibration isolation,
both between the construction element and the support means/the spacer screw and between
the support foot and the support surface (floor joist or the like). This is a far
better dampening spacer than prior art spacer arranged for "floating floors".
Short description of the figures
[0017] The invention will now be described, by way of example, with reference to the accompanying
figures in which:
Fig. 1a shows a principal side view of a spacer according to the invention, when mounted
in a construction element and where a support foot is to be mounted to a spacer screw
of the spacer.
Fig. 1b shows the spacer of Fig. 1a when the support foot is mounted to the spacer
screw and where the spacer is in a using position as a support for a construction
element positioned on a support surface.
Fig. 1c is a zoomed view of the upper part of Fig. 1a.
Fig. 2 shows a zoomed view of the upper part of the spacer with an alternative solution
of a connection between a support means and a positioning means of the spacer.
Fig. 3 shows a zoomed view of an upper part of an alternative spacer according to
the invention.
Description of embodiments
[0018] In the following, a detailed description of a preferred embodiment of a spacer 1
according to the invention is described with reference to the accompanying figures.
The invention is not limited to the figures.
[0019] Fig. 1 shows a principal side view of a spacer 1 according to the invention, when
mounted in a construction element 2 and where a support foot 25 is to be mounted to
a spacer screw 20 of the spacer 1. Fig. 1b shows the spacer 1 of Fig. 1a when the
support foot 25 is mounted to the spacer screw 20 and where the spacer 1 is in a using
position as a support for the construction element 2 and where the spacer 1 is positioned
on a support surface 3. Fig. 1c shows a zoomed view of the marked area A of Fig. 1b.
[0020] The spacer 1 is arranged to support and position a construction element 2 at a distance
from a support surface 3. The construction element 2 typically may be a floorboard,
a floor joist, or the like and the support surface 3 may typically be a concrete joist
or other kind of joists, which serves as a floor or floor joist in a building for
example. Relating to a using position of the spacer 1 as a support of the construction
element 2 on the support surface 3, the spacer 1 has an axial extension X which normally
is a vertical direction X. The spacer 1 comprises four important main parts, a positioning
means 10, a support means 15, a spacer screw 20 (to which a support foot 25 may be
attached) and a first resilient bushing 30.
[0021] The positioning means 10 is arranged both for positioning of the spacer 1 relative
a hole 4 in the construction element 2 and for attaching or at least keeping the position
means 10 in a mounted position in the hole 4 of the construction element 2. Thus,
the positioning means 10 comprises first engagement means 11 which are arranged to
engage with a side of the hole 4 of the construction element 2. In the embodiments
of Figs. 1a-c, Fig. 2 and Fig. 3, the positioning means 10 comprises at least an upper
first flange 12, which is arranged to grip around edges 4a of the hole 4 of the construction
element 2. Preferably, the upper first flange 12 is recessed in the construction element
2, wherein the construction element 2 comprises a recess around the hole 4. The hole
4 preferably is a circular bore hole. The recess provides an even upper surface of
the construction element 2 where the upper first flange 12 of the positioning means
10 doesn't protrude above the upper surface of the construction element 2. Of course,
this upper first flange 12 may be excluded such as only the first engagement means
11 of the positioning means 10 has contact (engages) with sides of the hole 4. For
example, the engagement means 11 may comprise a thread which is arranged to engage
with sides of the hole 4. The positioning means 10 as well as the corresponding hole
4 in the construction element 2 preferably have a circular cross-section, but other
forms like square, quadratic, hexagon, octagon, or any other form is of course possible
within the inventive concept.
[0022] The positioning means 10 further comprises a second flange 13 arranged to abut an
underside of the construction element 2, wherein the second flange 13 extends transverse
the vertical direction X, outwards in direction away from the engagement means 11
of the positioning means 10. By that, the second flange 13 supports the construction
element 2, which rest on top of the second flange 13 and the weight of the construction
element 2 and forces subjected the same are transferred to the second flange 13 of
the positioning means 10 and further to the support means 15 via the first resilient
bushing 30. The second flange 13 of the positioning means 10 further comprises a first
side part 14, which projects away from second flange 13/ the construction element
2, in direction towards the support foot 25, in the using position of the spacer 1.
The first side part 14 may be arranged as a circumferential wall, which extends all
the way around outer edge/edges of the second flange 13, such as an inverted, cup-like
space is achieved, which is open downwards. This downwardly open cup-like space is
arranged to receive the first resilient bushing 30, which will be explained further
below.
[0023] The spacer 1 further comprises the elongate spacer screw 20 which extends in the
vertical direction X and comprises an upper end 21 and an opposite lower end 22, and
an external first thread 23. The latter preferably extends along the whole length
of the spacer screw, but may of course be shorter, such as at least a part of a distance
between the upper end 21 and the lower end 22 of the spacer screw 20 comprises the
first thread 23. The spacer screw 20 may in the using position extend into the hole
4 of the construction element 2.
[0024] Further, the spacer 1 comprises the support foot 25 which is intended for abutment
against the support surface 3. The support foot 25 is arranged at the second end 22
of the spacer screw 20 and is "hat-shaped" with an upper circumferential wall 29 arranged
around an open top and extending in the vertical direction X. At the bottom of the
wall 29 a top flange 28a extends perpendicularly away from the wall 29 and the top
flange 28a comprises a circumferential side part 28b which protrudes vertically downwards
from the top flange 28a, in the vertical direction X. This forms a cup-like space
which is open downwards wherein a third resilient bushing 32 is arranged in this space.
The third resilient bushing 32 is arranged to abut the support surface 3 to dampen
vibrations and noise which otherwise are transferred to the support surface 3 from
the construction element 2.
[0025] In the preferred embodiment, the support foot 25 is arranged for snap-connection
to the spacer screw 20 by mutually corresponding engagement means 24, 26. The spacer
screw 20 comprises first engagement means 24 which are arranged as flexible tongues
which protrudes from the second end 22 of the spacer screw 20, in direction away from
first end 21. The support foot 25 comprises corresponding second engagement means
26, which is arranged as a chamfered inner edge 26 arranged at the intersection between
the top flange 28a and the circumferential wall 29 of the support foot 25. By means
of the first and second engagement means 24, 26, the support foot 25 is releasably
fixable to the spacer screw 20. Of course, the support foot 25 can be a part of the
spacer screw 20 as one unit, and it may also be arranged as a simple end of the spacer
screw 20 which may be arranged as to abut the support surface 3. The support foot
may comprise an outer thread 27, with the same function as the first outer thread
23 of the spacer screw 20.
[0026] The spacer 1 further comprises the support means 15, which comprises a bottom part
18, through which an internal second thread 16 extends, perpendicular relative the
bottom part 18, which means that the second thread extends in the vertical direction
X. The internal second thread 16 is in threaded connection with the external first
thread 23 of the spacer screw 20, in the using position of the spacer 1 as a support
to the construction element 20. By rotating the spacer screw 20 in/relative the support
means 15, the distance between the construction element 2 and the support foot 25
(and by that the distance to the support surface 3) is adjustable. The support means
15 is thereby positioned relative the positioning means 10 and relative the construction
element 2, in the using position of the spacer 1. According to the preferred embodiment,
the bottom part 18 of the support means 15 comprises a second side part 17, which
projects away from the bottom part 18, in direction towards the construction element
2, in the using position. This second side part 17 preferably is arranged as a circumferentially
wall around outer edge/edges of the bottom part 18.
[0027] The first resilient bushing 30 is as mentioned above arranged between the second
flange 13 of the positioning means 10 and the bottom part 18 of the support means
15. This means that the weight of the construction element 2 as well as forces subjected
to the construction element 2 are transferred from the construction element 2 to the
positioning means 10 and further via the resilient bushing 30 to the support means
15, since the resilient bushing 30 is in contact with the support means 15 and the
positioning means 10. The force is further transferred further from the internal flange
16 of the support means 15, to the external thread 23 of the spacer screw 20, and
to the support surface 3 via the dampening foot 25 and its third resilient bushing
32. The first resilient bushing 30 is preferably arranged with a central opening which
provides a passage for the spacer screw 20.
[0028] The first side part 14 of the positioning means 10 comprises first connecting means
14a, which preferably is arranged either as a groove in the first side part 14, which
groove may extend around the complete second side part 14, or as local recesses, or
arranged as a protruding heel 14a which extends away from the first side part 14 locally
or along the whole circumference of the first side part 14. Further, the second side
part 17 of the support means 15 comprises second connecting means 17a, which preferably
is arranged as a protrusion, protruding in direction towards the spacer screw 20 (relating
to the using position of the spacer). The second side part 17 of the support means
15 is thereby connectable to the first side part 14 of the positioning means 10, by
means of the first and second connecting means 14a, 17a, which are arranged to engage
with each other. Preferably, the support means 15 may be able to slide relative the
positioning means 10 in the vertical direction X, by that the second connecting means
17a of the support means 15 is movable along the first side part 14 and above the
first connecting means 14a of the positioning means 10. For example, the first and
second connecting means 14a, 17a are mutually corresponding snap connections where
one snaps relative the other, for example as two cooperating projections. This enables
a possible sliding motion of the support means 15 relative the positioning means 10
in their connected state, which is good since the first resilient bushing 30 flexes
when subjected to compression.
[0029] As an option, a second resilient bushing 31 may be arranged between the first engagement
means 11 of the positioning means 10 and the spacer screw 20, for guiding of the spacer
screw 20 when the spacer screw 20 extends into the hole 4 of the construction element
2. When the construction element 2 is adjusted relative the support surface 3, via
the spacer screw 20, the upper end 21 of the spacer screw 20 might extend into the
hole 4 of the construction element 2. The second resilient bushing 31 guides / centers
the spacer screw 20 in the hole 4 as well as taking care of / dampening eventual vibrations
and "contact noise" occurred by contact between spacer screw 20 and the positioning
means 10, and/or eliminates airborne noise which otherwise might be transferred via
a gap around the spacer screw 20 and the first engagement means 11 of positioning
means 10.
[0030] The material of positioning means 10 and the support means 15 are made of stiffer
material than the at least one first resilient bushing 30, preferably they are made
from some kind of plastic material and the at least one first resilient bushing 30
as well as the second and third resilient bushings 31, 32 are preferably made of rubber,
or any other resilient material. Other types of design of the resilient bushings which
provides a dampening effect may also be used, for example springs or spring-like bushings.
[0031] Fig. 2 shows a zoomed view of the upper part of the spacer 1 with an alternative
solution of the connection between the support means 15 and the positioning means
10 of the spacer 1. The only difference compared to the above-described embodiment
of Figs. 1a-c is that there is no snap-connection in this alternative solution. Instead,
there is at least one upwardly open groove arranged in the second side part 17 of
the support means 15, in which the first side part 14 of the positioning means 10
is insertable. In this way, a "closed" space for the first resilient bushing 30 is
achieved, wherein the first resilient bushing 30 is safely kept and protected inside
the space. Of course, a snap-connection is possible also in this alternative if wanted,
for example by have corresponding protrusions arranged both on at least one of the
walls of the groove in the second side part 17 of the support means 15 and on the
first side part 14 of the positioning means 10, which protrusions may engage to cause
a snap-connection. The groove may for example be a circumferentially extending groove
or two or more shorter grooves arranged in the second side part 17 of the support
means 15 and corresponding tongues or the like, arranged at the first side part 14
of the positioning means 10. Since the threaded engagement between the external thread
23 of the spacer screw 20 and the internal thread 16 of the support means 15, it is
possible to exclude the connection between the positioning means 10 and the support
means 15, but the connection provides an extra security of keeping the support means
15 in position.
[0032] Fig. 3 shows a zoomed view of an upper part of a spacer 1 according to an alternative
embodiment of the invention. According to this embodiment, the positioning means 10,
the support means 15 and the at least one first resilient bushing 30 are vulcanized
to one unit, which provides a simple and cost-efficient solution for providing a dampening
effect at the level of the construction element 2. The lower part of the spacer 1
including the support foot etc. is similar with the earlier presented embodiments.
This vulcanized unit may have an upper first flange 12, eventually a second flange
13 and preferably some slits (not visible), which makes it insertable into the hole
4 of the construction element 2. Another option might be that the engaging means 11
of the positioning means 10 comprises a thread which may engage with sides of the
hole 4.
1. Spacer (1) for supporting and positioning a construction element (2) at a distance
from a support surface (3); relating to the using position of the spacer (1) as a
support of the construction element (2) on the support surface (3), the spacer (1)
has an axial extension in a vertical direction (X), the spacer (1) comprising:
a positioning means (10) arranged for positioning of the spacer (1) relative a hole
(4) in the construction element (2), wherein the positioning means (10) comprises
first engagement means (11) which are arranged to engage with a side of the hole (4)
of the construction element (2),
an elongate spacer screw (20) extending in the vertical direction (X) with an upper
end (21) and an opposite lower end (22), wherein the spacer screw (20) comprises an
external first thread (23) extending at least a part of a distance between the upper
end (21) and the lower end (22),
a support foot (25) intended for abutment against the support surface (3), wherein
the support foot (25) is arranged at the second end (22) of the spacer screw (20),
preferably by that the support foot (25) and the spacer screw (20) comprises mutually
corresponding engagement means (24, 26) by means of which the spacer screw (20) is
fixable in or on the support foot (25),
a support means (15) which comprises an internal second thread (16) which is in threaded
connection with the external first thread (23) of the spacer screw (20), wherein the
distance between the construction element (2) and the support foot (25) being adjustable
by rotation of the spacer screw (20) in the support means (15), wherein the support
means (15) is positioned relative the positioning means (10) in the using position
of the spacer (1),
at least one first resilient bushing (30), arranged between at least one of the construction
element (2) or the positioning means (10) and the support means (15).
2. Spacer (1) according to claim 1, wherein the positioning means (10) and the support
means (15) are of stiffer material than the at least one first resilient bushing (30).
3. Spacer (1) according to claim 2, wherein the positioning means (10) and the support
means (15) are made of plastic and the at least one first resilient bushing (30) is
made of rubber.
4. Spacer (1) according to any of the preceding claims, wherein the first engagement
means (11) of the positioning means (10) has at least one upper first flange (12)
arranged to grip around edges (4a) of the hole (4) of the construction element (2).
5. Spacer (1) according to any of the preceding claims, wherein the positioning means
(10) comprises a second flange (13) arranged to abut an underside of the construction
element (2) wherein the second flange (13) extends transverse the vertical direction
(X).
6. Spacer (1) according to claim 5, wherein the second flange (13) of the positioning
means (10) comprises a first side part (14) which projects away from the construction
element (2) towards the support foot (25), in the using position, and the support
means (15) further comprises a bottom part (18), wherein the internal second thread
(16) of the support means (15) extends through the bottom part (18), perpendicular
relative the bottom part (18), wherein the at least one first resilient bushing (30)
is arranged between the bottom part (18) of the support means (15) and the second
flange (13) of the positioning means (10).
7. Spacer (1) according to claim 6, wherein the bottom part (18) of the support means
(15) comprises a second side part (17) which projects away from the bottom part (18)
towards the construction element (2), in the using position, wherein the first side
part (14) of the positioning means (10) comprises first connecting means (14a) and
the second side part (17) of the support means (15) comprises second connecting means
(17a), wherein the second side part (17) of the support means (15) is connectable
to the first side part (14) of the positioning means (10).
8. Spacer (1) according to any of the preceding claims, further comprising at least one
second resilient bushing (31) arranged between the first engagement means (11) of
the positioning means (10) and the spacer screw (20) for guiding of the spacer screw
(20) when the spacer screw (20) extends into the hole (4) of the construction element
(2).
9. Spacer (1) according to any of claims 1 - 5, wherein the positioning means (10), the
support means (15) and the at least one first resilient bushing (30) are vulcanized
to one unit.
10. Spacer (1) according to any of the preceding claims, wherein the support foot (25)
of the spacer (1) comprises at least one third resilient bushing (32), arranged at
an underside of the support foot (25) which faces the support surface (3) and which
at least one third resilient bushing (32) is intended for abutment against the support
surface (3).