U.S. patent number 3,781,060 [Application Number 05/285,585] was granted by the patent office on 1973-12-25 for safety guard for reclining chair and the like.
This patent grant is currently assigned to Kroehler Mfg. Co.. Invention is credited to Frederick R. Pentzien.
United States Patent |
3,781,060 |
Pentzien |
December 25, 1973 |
SAFETY GUARD FOR RECLINING CHAIR AND THE LIKE
Abstract
A safety guard for an exposed linkage of an extendable device
utilized in reclining chairs and the like. The safety guard has a
body member which fastens on one side of the linkage to restrict
access to the space between adjacent links of the linkage in all
positions of the linkage.
Inventors: |
Pentzien; Frederick R.
(Naperville, IL) |
Assignee: |
Kroehler Mfg. Co. (Naperville,
IL)
|
Family
ID: |
23094887 |
Appl.
No.: |
05/285,585 |
Filed: |
September 1, 1972 |
Current U.S.
Class: |
297/68;
297/85R |
Current CPC
Class: |
A47C
1/0345 (20130101) |
Current International
Class: |
A47C
1/031 (20060101); A47C 7/00 (20060101); A47C
1/038 (20060101); A47c 003/03 () |
Field of
Search: |
;297/68,85,217,219,190,463 ;5/13,51R ;248/277 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Zugel; Francis K.
Claims
I claim:
1. A safety guard for an exposed linkage of an extendable device
having at least a pair of pivotal connections between links thereof
and at least a pair of spaced apart fasteners mounted on at least
one link thereof, said safety guard comprising a substantially
planar body member having a length at least equal to the distance
between two pivotal connections of the linkage in its extended
position and a width at least equal to the width of the linkage in
its retracted postion at its widest exposed portion formed by at
least a pair of links pivotally interconnected, said member being
fastenable to one side of the linkage to a pair of fasteners of the
linkage, whereby said member is transportable with the linkage to
restrict access to the space between adjacent links of the linkage
in all positions of the linkage.
2. The safety guard of claim 1 wherein said member is pivotally
connected to a pair of fasteners of the linkage.
3. The safety guard of claim 2 wherein one of said pivotal
connections of said member to the linkage includes a slidable
connection whereby said member is substantially unaffected by a
change in the distance between the pair of pivotal connections of
the linkage interconnecting pairs of links of the linkage.
4. The safety guard of claim 3 wherein said slidable connection
comprises a portion of said member defining an elongated slot
adapted to receive an extension of a fastener member of the linkage
for sliding movement within the elongated slot defined by said
portion of said member.
5. The safety guard of claim 1 wherein said member is adapted to be
fastened to two fasteners mounted on one selected link of the
linkage adjacent the ends of the link, whereby said member is
transportable with the selected link between the contracted and
extended positions of the linkage.
Description
BACKGROUND OF THE INVENTION
This invention relates to a safety guard for the exposed linkage of
reclining chairs and the like.
Reclining chairs, folding beds and the like have been popular for
some time. Many of these devices, and particularly reclining
chairs, utilize mechanical linkages to extend one or more portions
of the device as it moves from a retracted to an extended position.
In reclining chairs particularly, linkages, such as leg rest
supporting linkages are necessarily exposed during the retraction
or extension operations. Linkages, especially of the lazy-tong
type, present a number of nips formed by interconnected links
adjacent their pivot points. These nips present a potential hazard
to both adults and children having their fingers in exposed
portions of the linkage when the chair is operated from one
position to another.
SUMMARY OF THE INVENTION
Therefore, it is one object of the present invention to provide a
safety guard for exposed linkages to prevent the insertion of
fingers into the linkage.
It is another object of the present invention to provide a compact
safety guard which is fastenable to an exposed linkage and
transportable with the linkage during its movement between
retracted and extended positions.
Still another object of this invention is the provision of a safety
guard for the exposed portion of a linkage for a reclining chair
which is extendable with the linkage to guard exposed nips thereof
in its extended position and is retractable with the linkage into
the body of the chain upon retraction of the linkage.
These and other objects and advantages of the present invention
will become apparent from the following description when the same
is considered in connection with the accompanying drawings.
In accordance with the present invention a safety guard is provided
having a substantially planar body member which is fastenable to
one side of a linkage, whereby the member is transportable with the
linkage to restrict access to the space between adjacent links of
the linkage. The substantially planar body member has a length at
least equal to the distance between two pivotal connections of the
linkage in its extended position and a width at least equal to the
width of the linkage in its retracted position at its widest
exposed portion formed by a pair of pivotally interconnected links.
Thus, the substantially planar body member has a guard surface
which covers substantially all of the exposed nips formed by
interconnected links and their pivot points, and is movable with
the linkage to restrict access to such nips in all positions of the
linkage. In this manner, the insertion of fingers into these nips
is prevented whether the linkage is in its extended or retracted
positions or in positions intermediate thereto.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a safety guard in accordance
with this invention installed on the leg rest supporting linkage of
a reclining chair, with the leg rest in retracted position and with
the outline of the reclining chair being shown by broken lines.
FIG. 2 is a similar view showing the linkage and safety guard in
its extended position.
FIG. 3 is a fragmentary view of the opposite side of the guard and
linkage as shown in FIG. 1.
FIG. 4 is a view similar to FIG. 3 showing the reverse side of the
safety guard and linkage shown in FIG. 2.
FIG. 5 is a side elevational view of a safety guard in accordance
with another embodiment of the present invention fastened to a
linkage of another design.
FIG. 6 is a fragmentary view similar to FIG. 5 showing the linkage
in an extended position as placed in a reclining chair, the outline
of the chair being shown by broken lines.
FIG. 7 is a fragmentary view similar to FIG. 5 showing the opposite
side of the guard and linkage.
FIG. 8 is a view similar to FIG. 6 showing the opposite side of the
guard and linkage.
BRIEF DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to FIGS. 1-4 of the drawings, the numeral 10 indicates
generally a safety guard in accordance with the present invention.
Guard 10 includes a substantially planar body member 11, preferably
formed of non-splintering material such as sheet metal, rigid
plastic, pressed board, and the like. While the present invention
will be described in relation to the leg rest extension linkage of
a reclining chair, it is understood that the safety guard of the
present invention is applicable to conventional extension linkages
of various types utilized in a wide variety of articles. Similarly,
while the safety guard may be employed in duplicate, for example,
one for each of the linkages on opposite sides of a reclining chair
structure, for purposes of simplification, only one of such
arrangements will be described in connection with the drawings.
FIG. 1 illustrates a reclining chair whose outline is shown by
broken line 12. Chair 12 has a leg rest formed by leg rest pads 13,
14 supported by a linkage, generally indicated as 16 which in turn
is fastened to chair 12.
More particularly, linkage 16 is pivotally connected to a fixed
rail 17 and a movable rail 18. Pads 13, 14 are mounted on hinged
supporting plates 19, 21, respectively. The portion of linkage 16
connected between rails 17 and 18 and plates 19 and 21 comprises
links 22, 23, 24, 25, 26 and 27 and pivotal connections 28, 29, 30,
31, 32, 33, 34, 35, 36, and 38. Metal plates 19 and 21 are hinged
together by a pivotal connection 40 so that plate 21 is articulated
with respect to plate 19.
Generally, linkage 16 includes two pair of each of three
substantially parallel links, 23, 25, and 27 and 22, 24 and 26,
respectively. Each of the links are pivoted at their ends as shown,
and links 22, and 23 are interconnected substantially intermediate
their ends by pivotal connection 30, while links 24 and 25 are
interconnected substantially intermediate their ends by pivotal
connection 33. As shown in FIGS. 2 and 4, in the extended position
of linkage 16, pivotal connections 31, 32, 33, 34, 35, 36, 37, 38
and 40 are normally exposed.
In accordance with the present invention, body member 11 of safety
guard 10 is fastened to the outer side of linkage 16 to restrict
access to the space between pivotally connected links adjacent the
normally exposed pivotal connections described above. As shown in
the drawings, fasteners 41 and 42 are provided on linkage 16 and
support body member 11. Fasteners 41 and 42 can be bolts, studs,
rivets and the like, but preferably are round headed rivets.
Fastener 41 is mounted on link 27 intermediate its ends. Fastener
42 is mounted on link 24 between pivotal connections 31 and 33.
Apertures are provided in body member 11 so that fasteners 41 and
42 can be inserted therethrough. Preferably the apertures are
larger than the diameter of the shanks of the fasteners, so that
the fasteners are pivotable within the apertures formed in member
11. The aperture formed in member 11 to pivotally receive the shank
of 42 comprises an elongated slot 43 adapted to slidably receive
the shank of fastener 42.
In the embodiment shown in FIGS. 1-4, linkage 16 and safety guard
10 mounted thereon are hidden within chair 12 when linkage 16 is in
its retracted position. In this condition, none of the pivotal
connections of linkage 16 is exposed to the fingers of the occupant
of the chair or other person. Upon extension of linkage 16, as when
the leg rest of the chair is extended, link 27 of the linkage
extends forwardly of the chair and is rotated from its position
shown in FIG. 3 to its position shown in FIG. 4. In such movement,
fastener 41 is pivoted within the corresponding aperture formed in
body member 11 and pulls body member 11 outwardly of the front of
chair 12 to the position shown in FIG. 4. Concurrently, fastener 42
on link 24 of linkage 16 is also extended from the position shown
in FIG. 3 to its position as shown in FIG. 4, while sliding and
slightly pivoting within slot 43 from the position shown in FIG. 1
to the position shown in FIG. 2. As shown in the latter Figure, in
the extended position of linkage 16, body member 11 restricts
access to the nips or spaces between adjacent links at their
pivotal connections heretofore described.
In another preferred embodiment of the present invention, as shown
in FIGS. 5-8, the safety guard in accordance with the present
invention is generally indicated by the numeral 50. Guard 50 in
this embodiment includes a substantially planar body member 51
formed of a material similar to the material utilized for body
member 11 in the previous embodiment. Body member 51 has portions
defining two apertures by which member 51 is fastened to the outer
side of a linkage 52 which supports a leg rest 53 of a reclining
chair whose outline is shown by broken line 54.
Linkage 52 is pivotally connected to a fixed rail 56 and a movable
rail 57. Leg rest 53 is mounted on a supporting plate 58 which is
connected to rails 56 and 57 by linkage 52 which comprises links
59, 60, 61, 62 and 62a and pivotal connections 63, 64, 65, 66, 66a,
67 and 68.
In this embodiment, body member 51 of safety guard 50 is fixedly
fastened to link 61 by means of two fasteners 69 and 70.
Preferably, a short slot 71 is provided in body member 51 to permit
initial adjustment of the body member to the fastener. However slot
71 is optional and not required.
As body member 51 is fixedly fastened to link 61, safety guard 50
is transportable therewith as linkage 52 is moved from its
retracted to its extended position, and to its intermediate
positions. In being transported with link 61, safety guard 50
restricts access of the fingers of the occupant or other person to
the nips formed by the links adjacent the pivotal connections 64,
65, 66 and 66a as guard 50 and link 61 moves from its generally
vertical position as shown in FIGS. 5 and 7 to its generally
acutely inclined position shown in FIGS. 6 and 8. It is noted that
the nip formed adjacent pivotal connection 67 lies within the body
of chair 54, although body member 51 could readily be extended to
restrict access to that area as well.
Various changes coming within the spirit of my invention may
suggest themselves to those skilled in the art; hence, I do not
wish to be limited to the specific embodiment shown and described
or uses mentioned, but intend the same to be merely exemplary, the
scope of my invention being limited only by the appended
claims.
* * * * *