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Патент USA US3041117

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June 26, 1962
P. s. FLETCHER
. 3,041,106
ADJUSTABLE CHAIRS
Original Filed Feb. 9, 1956
‘97/
39 3
99
‘94' 703 709
2 Sheets-Sheet l
5:1
70]
INVENTOR.
CZ Howneys'.
June 26, 1962
P. s. FLETCHER
3,041,106
ADJUSTABLE CHAIRS
Original Filed Feb. e, 1956
2 Sheets—Sheet 2
INVENTOR.
Z7656)’ Sz‘ewari‘ 177592167787’
3,041,100
,.
i6
Patented June 26, 1962
2
3,041,106
Peter Stewart Fletcher, Delray Beach, Fla, assignor to
ADJUSTABLE CHAmS
Anton Lorenz, Boynton Beach, Fla.
Original application Feb. 9, 1956, Ser. No. 564,473, now
Patent No. 2,958,371, dated Nov. 1, 1960. Divided
and this application Aug. 14, 1959, Ser. No. 833,861
7 Claims. (Cl. 297-89)
below the forward edge of the seat 5, and is mounted on
a lazy tong device having an arrangement of linkage
quadrilaterals which support the leg rest at one end and
is itself connected to and supported at its other end to
the forward part of the support. This lazy tong device
includes one pair of links 88 and 89 which are hinged
together by a hinge 90, one end of the link 88 being con
nected by a pin 91 to the support 1. Links 92 and 93
form another pair of links and are hinged together at 94.
This invention relates to adjustable chairs which may 10 One end of link 92 is pivotally connected by pin 95 to
the support 1, and the tree or other end of link 93 is
be adjusted from a normal sitting position into a tilted
connected by a pin ‘96- to the leg rest 8. Links 97 and
position during which a leg rest is elevated to a position
93 form still another pair of links which are hinged to
in front of the seat.
gether at ‘99. One end of the link 98 is hinged by pin
An object of the invention is to provide an improved
tilting chair in which the leg rest or leg-supporting plat 15 100 to the leg rest -8 below pin 96, and the link 97 is
hinged by pin 101 to the free end of link 89. The link
form is normally disposed below the front of the seat but
97 is extended beyond its hinge or pin 101 and the ex
is automatically elevated into leg-supporting position
tension 97E is pivotally connected by a pin 102 to the
when the chair is operated into a tilted position; which
link '93 intermediate of its ends.
will have simple, dependable and effective mechanism for
The link 93 is provided with an extension 103 which
operating the leg rest or leg-supporting platform into
is hinged at 104 to the link 08 intermediate of its ends.
and out of of its e?ective leg-supporting position; which
This provides three quadrilateral linkages arranged in
can have accelerated movement of the leg rest for small
tandem with the leg rest 8 at one end and the support 1
movement of the seat and back rest; which will employ
at the other end, so that when any one of the links is
novel and simple mechanism; and which will be relatively
durable, compact and inexpensive.
4
Other objects and advantages will be apparent from the
following description of several embodiments of the
invention and the novel features will be particularly
pointed out hereinafter in connection with the appended
claims.
In the accompanying drawings:
FIG. 1 is a side elevation of a chair constructed in
25 rocked, it will cause extension or contraction of the lazy
tong device and elevation or retraction of the leg rest 8.
The link 87, which is operated ‘by the back rest and seat
unit when the latter is tilted into its tilted position, is con
nected by a pin 105 to the link 88 between its hinge 104
Thus, the back rest when it and
30 and its pivot pin '91.
the seat are pushed rearwardly, will cause an extension
of the lazy tong device at each side of the seat, and an
elevation of the leg rest 8 to the FIG. 2 position in front
accordance with this invention, but with a side removed
of the seat 5.
by a section just inside the chair in order to illustrate the
The seat 5 is provided part way of its forward and
mechanism employed for extending the leg rest, the parts 35
rearward edges with a depending lug 106, one at each
being shown in the position occupied when the chair is
side or" the seat, and a guiding link 107 at each side of
in sitting position.
the
seat is hinged by pin 108 to the lug 106 and also is
FIG. 2 is a similar view but with the parts in the tilted
hinged by pin 109 to a lug 110 on the support 1. The link
position;
FIG. 2a is a schematic diagram illustrating the action 40 107 is normally approximately upright when the seat and
back rest are in chair-sitting positions, but when the seat
of the linkage of FIGS. 1 and 2 used to extend the leg
and back rest are tilted and moved rearwardly into the
rest;
FIG. 3 is a view similar to FIG. 1, except that still 7 tilted positions shown in FIG. 2, the link 107 will rock
clockwise on the support 1 from its approximately upright
another modi?cation of the linkage is illustrated;
FIG. 4 is a view similar to ‘FIG. 3, but with the parts 45 position shown in FIG. 1 to an inclined position shown in
FIG. 2, which, with the descent of the lower end of the
in their tilted positions; and
back rest, as shown in FIG. 2, will give a rearward tilting
FIG. 4a is a schematic diagram illustrating ~the link
of the seat 5.
age employed in FIGS. 3 and 4 to elevate the leg rest.
In the embodiment of the invention illustrated in
In the embodiment of the invention illustrated in FIGS.
1, 2 and 2a, the chair includes a support 1 having up 50 FIGS. 1 and 2, it will be noted that there is a basic tour
bar linkage, and an auxiliary four bar linkage at each
right side members 2 that are spaced apart but connected
side of the seat. This basic linkage includes the link 107
by base members 3 and 4. A seat '5 and a back rest 6
and that part of link 84 between pivot 85 and pin 83,
are disposed between the side members 2 of the support.
constituting opposite links of the basic quadrilateral. The
A leg-supporting platform or rest 8 is disposed between
the side members 2 of the support 1 below the forward 55 seat and back rest unit is another link in this basic quad
rilateral and the frame or support 1 is the opposite and
edge of the seat 5 when the chair is in its normal sitting
position, and this leg-supporting platform is mounted on
a lazy tong device. This lazy tong devise includes three
?nal link in this basic quadrilateral. This basic quadri
‘In this embodiment the leg rest 8 is normally disposed
eration for the leg rest linkage is produced than would
lateral controls the movement of the seat and back rest
unit between sitting and reclining or tilted positions. The
pairs of links at each side of the seat which are carried
by the support 1 and which in turn support the leg rest 60 auxiliary four bar linkage includes the part of link 84
below the pivot 85, and the link 88 between the pins 105
8 and extend or retract it as desired.
and 91 which form two opposite links of the auxiliary
In the embodiments of the invention illustrated in
quadrilateral, and the link 87 and the support which form
FIGS. 1, 2 and 2a, the back rest 6 and seat 5 are rigidly
the other two opposite links that complete the auxiliary
connected together to form a unit and this unit is pro
quadrilateral. The auxiliary quadrilateral controls the
vided at the bottom of the back rest 6 with a lug 82 which
operation of the linkage which actuates the leg rest,
is connected by pivot pin 83 to the upper end of a
whereas the basic quadrilateral controls the movements
lever 84- which is pivoted on a pin or rod 85 carried by
of the seat and back rest unit, with the link 84 being the
the support 1. The lower end of the lever 84 is pivotally
operative connection between the two four bar linkages or
connected by a pin 86 to one end of an actuating link 87
which operates a lazy tong device formed of 3 pair of 70 quadrilaterals. The result of these two four bar linkages
connected in this manner is that a much larger accel
links near each side of the seat.
3,0d1,106
3
4
be possible with only one four bar linkage, which is
92 and 93 form the ?rst pair, the links 88 and 89 form
the second pair, and links 97 and 93 form the third pair.
advantageous when the seat and back rest are tilted only
a small amount and yet full operation of the leg rest is
obtained. The links 88 and 92, and extension 193 may
be considered with the support or frame as still another
The extension of at least one link of a pair refers to the
extension 97E of link 97 and the extension 103 of the
link 93.
four bar linkage, with the link 87 and lower part of
In both illustrated embodiments of the invention, the
lever 84 below the pivot 85 as actuating means operatively
seat and back rest are rigidly connected together and
connecting two four bar linkages, so that when the seat
hence the movement of the seat is controlled directly by
and back rest unit is tilted out of sitting position, the basic
the movement of the seat and back rest. The seat and
four bar linkage will actuate the leg rest four bar linkage 10 back rest in FIGS. 1, 2, and 2a are supported by the
and advance and elevate the leg rest.
links 84- above the pivot 35 and by the links 1%7. These
In the embodiment of the invention shown in FIGS. 3,
two links 84 (above 85) and 1117 at each side of the
4 and 4a, the back rest 6 and seat 5 are formed as a rigid
Seat are connected at their lower ends by the frame,
unit, as in FIGS. 1 and 2 and the bottom of this unit
through pivot 85 and lug 1t), and are connected at their
below the back rest is provided with a lug 111 which is 15 upper ends by the seat 5. The frame acts as a bar
pivoted by a pin 112 to one end of an upright lever 113
connecting the lower ends of links 84 and 107 and the
that is rockably mounted on a pin 114 carried by the
seat acts as another bar that connects the upper ends of
support 1. The seat 5, at each side and approximately
the same links 84 and 107. Thus at each side of the seat
midway between its front and rear edges is hinged to a
there is a four bar linkage supporting the seat from the
link 115 which is similar to the link 1417 of FTGS. l
frame in which the seat 5 and links 84 and 1d"! are the
and 2, and which link 115 is pivoted at 116 to a lug 117
movable links. This four bar linkage actuates that part
on the support 1.
The seat 5 and back rest 6 move
of link 84 which depends below pivot 85 and which is
between the upright or sitting positions shown in FIG. 3
and the tilted positions shown in FIG. 4, in the same
connected by actuator link 87 to one of the links of the‘
128 and 129 which are hinged together by hinge 130 form
back rest movement. This gives a quicker elevation for
still another pair of links. The link 128 is hinged at 131
to the link 123 at the beginning of the extension 126,
and the link 129 is 'hinged by pin 132 to the leg rest 8.
Link 129 is also hinged at 133 to the link 113 between
the hinges 1213 and 127.
The link 118 is hinged at 134 to the support 1 which
provides another series of three pairs of links at each
side of the seat, interconnected to form three quadrilateral
the leg rest useful where the amount of tilt of the seat
and back rest is rather small. This smaller tilt of the seat
and back rest is with full advance of the leg rest useful
by those who wish to recline only a minimum amount
lazy tong device that is connected to the frame 1, such
manner as explained for FIGS. 1 and 2, and the leg 25 as the link 88 between its pivot 91 and the first pivotal
rest 8 is disposed below the front edge of the seat, as
connection of link 88 to any link of the lazy tong device.
in FIGS. 1 and 2.
The links $4, 87 and 88 and the frame form another four
The leg rest 8 is mounted on a modi?ed lazy tong
bar linkage which forms an actuating linkage for the
device which includes one pair of links 118 and 119 which
leg rest control linkage from the ?rst mentioned four bar
are connected together by a hinge 12b, and the link 119
linkage formed of the seat, links 34, 197 and the frame.
is also hinged at 121 to leg rest 8. Another pair of links
This arrangement of two interconnected sets of four bar
122 and 123 are hinged together by a hinge 124, the
linkages at each side of the seat provides control of the
link 122 being also hinged at 125 to the support 1. The
acceleration of the leg rest 'to advance and elevate it
link 123 is provided with an extension 126 which is hinged
from its stored position below the front of the seat to its
at 127 to the link 11S intermediate of its ends. Links 35 leg supporting position in dependance on the seat and
when watching television.
In FIGS. 3, 4 and 4a, the one four bar linkage includes
links 113 and 115 supporting the seat, the seat and the
frame forming the other two bars of this linkage. Its
linkages connected together in tandem, with the leg rest 45 other four bar linkage is formed of link 122 above the
8 forming one end of the lazy tong device and the sup
port forming the other end of it. Thus, when this link
age is operated, it will extend the lazy tong device at
each side of the seat and elevate the leg rest from the
inactive position shown in FIG. 3 into the leg-supporting
position shown in FIG. 4.
The actuating of this lazy tong device is obtained by
providing an extension of link 122 upwardly beyond its
pivot pin 125 by which the link 122 is hingedto the
support 1, and the upper end of this extension is con 55
nected by a pivot pin 135 to one end of a link 136, the
other end of which is connected to a pin 137 which con
nects the lug on the lower edge of the seat to the link
115. With this arrangement, when the seat and back
rest are moved rearwardly from the FIG. 3 to the FIG. 4
position, the link 115 will rock rearwardly at its upper
end and thus pull on the link 1% which is connected to
the link 122 of the lazy tong device, and thus the lazy
tong device will be operated to elevate the leg rest when
ever the seat and back rest are moved rearwardly into
pivot 125, the link 136, link 115 and frame 1. This
other four bar linkage is actuated by the fact that the link
115 is common to both of these linkages. The part of
link 122 below its pivot 125 gives the leg rest operating
linkage a large acceleration movement as in FIGS. 1,
2 and 2a.
This application is a division of my copending appli
cation, Serial Number 564,473, ?led February 9, 1956,
now Patent No. 2,958,371, granted November 1, 1960.
It will be understood that various changes in the details
and arrangements of parts which have been herein
described and illustrated in order to explain the nature
of the invention may be made by those skilled in the art
within the principle and scope of the invention as
60
expressed in the appended claims.
I claim:
1. An adjustable chair comprising a frame, a back
rest and a seat rigidly connected together to act as a unit,
a four bar linkage adjacent each side of said seat and
supporting said seat and back rest on said frame to tilt
their tilting positions. When the seat and back rest are
returned-to their forward or sitting position shown in
between sitting and tilted positions in which linkage said
FlG. 3, the lazy tong device will retract the leg rest 8.
In all of the ?gures it will be understood that there
frame and seat form two opposite sides thereof, a leg
rest disposed beneath the forward part of the seat, an
is one of these lazy tong arrangements at each side of 70 extensible linkage unit directly connecting said leg rest
to said frame and alone constituting complete support
the seat so as to provide a stable mounting for the leg
rest 8, and that suitable stops or means (not shown),
of said leg rest from said frame, and actuating means
may be employed to limit the tilting movements of the
connecting a link of another side of said four bar linkage
seat and back rest.
to said extensible linkage by which the movement of
In the example shown in FIGS. 1, 2 and 2a, the links 75 the seat into its tilted position causes operation of said
3,041,106
5
extensible linkage to advance and elevate the leg rest in
front of said seat.
2. An adjustable chair comprising a frame, a back
rest and a seat connected together to form a rigid unit,
a leg rest stored below the forward part of the seat, a
means completely supporting said leg rest from said frame
and controlling the path of movement of said leg rest in
relation to the rest of said chair so that the leg rest
moves from a stored position below the front of said
seat to a leg supporting position in front of said seat,
said control mechanism having three generally horizontal
links and three generally vertical links, one of said hori~
zontal links being said frame and thereby forming a
stationary support, another of said horizontal links being
otally connected at corresponding ends directly to said.
frame and at their other ends to said unit to support 10 said seat and thereby forming a movable body support
pair of links adjacent each side of the seat, with the links
of each pair arranged in spaced relation forwardly and
rearwardly of the seat, normally generally upright, piv
said seat and back rest for movement between sitting and
tilted positions, additional extensible linkage connecting
said leg rest to said frame and completely supporting the
leg rest from the frame independently of the seat, nor
mally below said seat when the seat is in its sitting posi
tion but operable when extended to advance and elevate
said leg rest to a position in front of said seat, and actu
ating lin'k means connecting one of said pair of links to
said extensible linkage and causing an extension of the
latter when the seat and back rest are moved into their
tilted positions.
3. The chair according to claim 2, wherein the con
nection between said extensible linkage and said frame at
each side of the seat is through two terminal links of
ing means, the third horizontal link forming an actuat
ing link and thereby forming another movable link of
said mechanism, one of said vertical links having pivotal
connections with each of said horizontal links, each of the
other two of said vertical links being pivoted at their ends
to two of the horizontal links, one of said pivots on
each of said two vertical links being on the same
horizontal link, the other of said pivots being on the
two other of said horizontal links, one of said other
two of said vertical links having an operative connection
to said additional means supporting said leg rest.
7. An adjustable chair comprising a frame, a back
rest and a seat rigidly connected together to act as a
unit, a pair of links at each side of the chair spaced
apart in a direction forwardly and rearwardly of the
25
the extensible linkage, arranged in spaced apart relation
chair, disposed generally upright, with the forward one
forwardly and rearwardly of the chair and arranged to
of each said pair of links longer than the rear one of
xtend generally upwardly and downwardly when such
that pair, the upper ends of all of said links being
inkage is retracted, and said actuating link means is
pivoted to said unit and forming its sole support, and
pivoted to one of such terminal links.
4. The chair according to claim 2, wherein said exten 30 said links below said unit being pivoted to said frame,
with the said links, unit and frame forming a four bar
sible linkage has two terminal links connected to said leg
linkage at each side of said ‘chair that supports said
rest at each side of the latter, one of the links of such
unit for movements of bodily translation between a sitting
linkage which is pivoted to one terminal link being
position Where said links are generally upright and a
extended beyond its connection to an interior link of such
rearwardly and reclining position in which said links
35
linkage, and as extended being pivoted to the other ter
are upwardly and rearwardly inclined, and said unit is
minal link which is connected to the leg rest, intermediate
bodily moved rearwardly from its sitting position, a leg
of the length of such other terminal link.
rest disposed beneath the forward part of the seat, with
5. An adjustable chair comprising a frame, a back rest
a face normally somewhat upstanding, an extensible four
and a seat connected together to form a rigid unit, a basic
bar linkage at each side of the chair connecting said
four bar linkage at each side of the seat supporting said 40 leg rest to said frame and forming the sole support for
unit from said frame and controlling the movement of
the rest on the frame independently of said unit, and
this unit between sitting and tilted positions, a leg rest,
e?ective when extended to elevate said leg rest to a
extensible linkage means at each side of the seat com
position in front of and- spaced from said seat, and
pletely supporting said leg rest from said frame and hav 45 actuating means connecting one of said pairs of links
ing three of its links and the frame forming another and
to said extensible linkage for causing an extension of
additional four bar linkage that controls the movement
said extensible linkage to elevate said leg rest when said
of the leg rest between a position beneath the forward
unit is moved into its reclining positions.
part of the seat and another position in which it is elevated
and forwardly of the seat, and means interconnecting the 50
References Cited in the ?le of this patent
two four bar linkages for causing elevation of the leg
UNITED STATES PATENTS
rest when said unit is moved into its tilted position,
6. An adjustable chair comprising a frame, a back rest
and a seat connected to form a rigid unit, a control
mechanism arranged in said chair to support said unit on
said frame and to control the movement of this unit
between sitting and tilted positions, a leg rest, said leg
rest being actuated by said control mechanism in co
ordination with said movement of said unit, additional
2,615,497
2,672,919’
2,750,988
2,760,554
2,781,825
2,914,113
2,921,624
Luckhardt __________ __ Oct.
Luckhardt ___________ __ Mar.
Luckhardt ___________ __ June
Lorenz _____________ __ Aug.
Lorenz _____________ __
eb.
Fletcher ____________ _.. Nov.
Lorenz ______________ __ Jan.
28,
23,
19,
28,
19,
24,
19,
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1956
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