U.S. patent number 3,767,190 [Application Number 05/132,456] was granted by the patent office on 1973-10-23 for pivoting chair with pivotally displaceable seat and back.
Invention is credited to William L. Biggerstaff.
United States Patent |
3,767,190 |
Biggerstaff |
October 23, 1973 |
PIVOTING CHAIR WITH PIVOTALLY DISPLACEABLE SEAT AND BACK
Abstract
A device in the form of a chair having seat and back sections
which pivot on a base in a toggle action. The seat and back
sections are pivotally interconnected at their juncture and are
pivotally connected to the base member at respective spaced pivot
positions. The seat section can shift to slidably displace its
pivot position, thereby providing freedom of toggle movement.
Further embodiments include an extendable footrest and spring
loaded arms.
Inventors: |
Biggerstaff; William L. (Los
Angeles, CA) |
Family
ID: |
22454136 |
Appl.
No.: |
05/132,456 |
Filed: |
April 8, 1971 |
Current U.S.
Class: |
482/142; 297/50;
297/318; 297/342; 482/130; 297/423.2 |
Current CPC
Class: |
A47C
1/034 (20130101); A47C 4/26 (20130101); A63B
2208/0233 (20130101); A63B 23/0211 (20130101); A63B
2210/50 (20130101) |
Current International
Class: |
A47C
1/031 (20060101); A47C 1/034 (20060101); A47C
4/00 (20060101); A47C 4/26 (20060101); A63B
23/02 (20060101); A63B 23/00 (20060101); A63b
023/02 () |
Field of
Search: |
;272/58,71,72,57R,79R,82,83R
;297/316,317,318,34,35,36,46,50,115,116,311,313,320,322,340,341,342,417,430 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pinkham; Richard C.
Assistant Examiner: Strappello; Harry G.
Claims
I claim:
1. An exercising device, comprising:
a base member;
a seat section;
a back section;
means for pivotally interconnecting said seat and back sections at
their junction;
means for pivotally connecting said seat and back sections to said
base member at respective first and second pivot positions on said
base member; and
shift means for slidably displacing at least one of said pivot
positions on said base member for freedom of swinging movement of
said seat and back sections on their pivotal interconnection and on
their pivotal connections with said base member;
said base member comprising a vertically rising member curved along
its upper extent to a horizontal direction and carrying said
slidably displaceable pivot position on said curved upper
extent.
2. The invention according to claim 1 in which said curved upper
extent is channeled and said displaceable pivot is carried by a
roller slidable within said channel.
3. The invention acccording to claim 2 in which the rear end of
said channel is formed with a detent section for said roller to
retain said seat in an extreme rearward position when said back
section is upright.
4. An exercising device, comprising:
a base member;
a seat section;
a back section;
means for pivotally interconnecting said seat and back sections at
their junction;
means for pivotally connecting said seat and back sections to said
base member at respective first and second pivot positions on said
base member; and
shift means for slidably displacing at least one of said pivot
positions on said base member for freedom of swinging movement of
said seat and back sections on their pivotal interconnection and on
their pivotal connections with said base member;
said base member comprising forward and rear pairs of oppositely
disposed legs, the legs of each said pair crossing, said rear legs
supporting said seat on their upper extent, the upper extent of
said rear legs being curved to a forward horizontal direction and
carrying said slidably displaceable pivot position.
5. An exercising device, comprising:
a base member;
a seat section;
a back section;
means for pivotally interconnecting said seat and back sections at
their junction;
means for pivotally connecting said seat and back sections to said
base member at respective first and second pivot positions on said
base member;
shift means for slidably displacing at least one of said pivot
positions on said base member for freedom of swinging movement of
said seat and back sections on their pivotal interconnection and on
their pivotal connections with said base member;
a pair of oppositely disposed arm members connected to the upper
end of said base member and extending horizontally forward
therefrom; and
means for spring loading said arm members on said base member for
movement of said arm members toward each other against the force of
said spring load.
6. An exercising device, comprising:
a base member;
a seat section;
a back section;
means for pivotally interconnecting said seat and back sections at
their junction;
means for pivotally connecting said seat and back sections to said
base member at respective spaced first and second pivot positions
on said base member for freedom of swinging movement of said seat
and back sections on their pivotal interconnection and on their
pivotal connections with said base member;
a pair of oppositely disposed arm members connected to the upper
end of said base member and extending horizontally forward
therefrom; and
means for spring loading said arm members on said base member for
movement of said arm members toward each other against the force of
said spring load.
7. The invention according to claim 6 in which said arm members are
connected to said base member at said second pivot position.
Description
FIELD OF THE INVENTION
The field of art to which the invention pertains includes the field
of amusement and exercising devices, particularly of the chair and
sofa type.
BACKGROUND AND SUMMARY OF THE INVENTION
There are available a wide variety of exercising devices which
operate on a toggle principle. Such devices generally take the form
of an open frame cot on which the user reclines. See for example
Lyon Design U.S. Pat. No. 213,889, Sellner Reissue U.S. Pat. No.
24,762, Lyon U.S. Pat. No. 3,491,998, Solloway et al. U.S. Pat. No.
2,938,572, Sellner U.S. Pat. No. 3,043,591 and Kupchinski U.S. Pat.
No. 3,378,259. See also for further background hereto U.S. Pat.
Nos. 312,763, 1,641,188, 2,240,204, 2,562,339, 2,808,827,
2,903,046, 3,096,121, 3,189,344, 3,235,304, 3,342,485 and
3,495,869.
The present invention provides an exercising device which is used
in a manner similar to that of a toggle cot, but which, in its
upright position, takes the form of a chair. This is accomplished
by providing a unique pivot point displacement mechanism which
allows the seat of the chair to be displaced forwardly as it is
being pivoted, thereby enabling the toggle action and allowing the
chair to assume a horizontally directed position.
In general terms, an exercising device is provided, comprising a
base member, a seat frame and a back frame. The back and seat
frames are pivotally interconnected at their junction and the
frames are pivotally connected to the base member at respective
spaced pivot positions. At least one of the pivot positions is
slidably displaceable on the base member so as to provide freedom
of swinging movement of the seat and back frames on their pivotal
interconnection and on the pivotal connections with the base
member. In a specific embodiment, pivotal connection with the base
member is accomplished with pivot points intermediate the length of
the seat and back frames and the seat frame can shift to slidably
displace its pivot position. The base member is formed with
vertically rising legs curved along their upper extents to a
horizontal direction. The curved upper extents of the legs are
channeled and carry rollers which slide therein, the rollers being
pivotally connected at opposite points between the length of the
seat. As a result of this construction, during use, the seat
alternately slides forwardly and rearwardly while pivoting so as to
effect the toggle action. The rear ends of the roller channels are
formed with detent sections for retaining the seat in an extreme
rearward position when the back is upright.
In further embodiments, an extendable footrest is provided in the
form of a U-shaped member the legs of which slide within tubular
members lengthwise on each side of the seat frame. In still other
embodiments, spring loaded arms are provided which can be moved
inwardly to provide exercise of the pectoral muscles.
As a result of the unique construction of the present apparatus,
and in particular, the unique combination of pivotally
interconnecting seat and back frames and slidable pivot connection
to a support base, an exercising device is obtained which can also
be used as a very comfortable chair. For the first time,
paraplegics and others who are chair-confined, including the large
number of people who sit most of the day, can obtain regular and
vigorous exercise, without leaving their chair. As a result of the
unique chair configuration, stretching and pulling exercising of
the neck, chest and abdominal muscles can readily be obtained. The
mechanism can be incorporated into a stuffed frame so that the
apparatus can be used as a chair in an office or home and, when it
is desired to obtain the benefit of stretching exercises, a simple
shift of position converts the chair into an exercising toggle cot.
Accordingly, apparatus is provided which has convenience features
not heretofore available. The mechanism by which the apparatus
operates is relatively simple and inexpensive, but provides smooth
and reliable operation.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the apparatus of the present
invention;
FIG. 2 is a schematic, side elevation view showing the apparatus in
an upright configuration in which it forms a chair;
FIG. 3 is a schematic, side elevation view of the apparatus in one
stage of use;
FIG. 4 is a schematic side elevation view of the apparatus in a
second stage of use;
FIG. 5 is a detailed view on line 5--5 of FIG. 4, in the direction
of the arrows;
FIG. 6 is a cross-sectional view on line 6--6 of FIG. 5, in the
direction of the arrows;
FIG. 7 is a cross-sectional view on line 7--7 of FIG. 3, in the
direction of the arrows;
FIG. 8 is a cross-sectional view on line 8--8 of FIG. 1, in the
direction of the arrows;
FIG. 9 is a cross-sectional view on line 9--9 of FIG. 3, in the
direction of the arrows;
FIG. 10 is a cross-sectional view on line 10--10 of FIG. 2, in the
direction of the arrows;
FIG. 11 is a cross-sectional view on line 11--11 of FIG. 4, in the
direction of the arrows; and
FIG. 12 is a perspective view of the apparatus in collapsed form
for easy carrying.
DETAILED DESCRIPTION
Referring to FIG. 1, there is illustrated a particular form of the
invention in which a toggle action exerciser is structured in the
form of a chair 10. The chair 10 includes a base section 12, a seat
frame 14 and a back frame 16. The base section 12 includes a pair
of opposing front legs 18 and 20 and a pair of opposing rear legs
22 and 24 crossed and joined intermediately therewith and spaced by
a horizontal bar 26 to define opposite sides of the chair 10. The
rear legs 22 and 24 curve concavely and then convexly from rear to
front in an S-like shape to support the seat frame 14. The front
legs 18 and 20 curve concavely from front to rear to a point
sufficiently vertically spaced from the seat frame 14 to support a
pair of arms 28 and 30 therefrom in cantilever fashion. Forward and
rear brace bars 32 and 34, respectively are secured between the
bottom portions of the opposing leg pairs 18-20 and 22-24 to give
further rigidity to the structure. A hinged set of pivot bars 36
and 38 are secured between respective front and rear legs to
prevent collapse of the legs, but allow the base section 12 to be
folded when desired. The legs 18, 20, 22 and 24 are each formed of
hollow square tubing, bent to the desired shape.
The seat section 14 includes a pair of aesthetically curved side
members 40 and 42 formed of hollow square tubing and which are
spaced and secured by a pair of transverse brace members 44 and 46.
Each brace member 44 and 46 is formed of hollow square tubing,
notched at the opposite ends thereof and welded at spaced locations
on the side members 40 and 42, as shown at 48 in a broken section
of the drawing. A seat cushion 50 is carried by the seat side
members 40 and 42 and secured thereto by loops of cloth 52
extending from the seat cushion 50.
The back frame 16 includes a pair of opposing side members 54 and
56 (the member 56 being shown in shadow), and a transverse brace
bar, shown in shadow at 58, connecting the side members 54 and 56
across their top ends. A back cushion 60 is secured to the side and
top frame members 54, 56, 58 by cloth flaps, such as 52, sewn about
the frame members 54, 56 and 58.
The rear ends of the seat section side members 40 and 42 and bottom
ends of the back section side members 54 and 56 are pivotally
interconnected and positioned so that the seat and back cushions 50
and 60 meet when the exerciser is in an upright position. The seat
frame 14 is carried on the base section 12 by the forward extent of
the rear legs 22 and 24. The forward extent of these legs is formed
with opposing slots, shown in shadow at 64, in which are disposed
rollers, shown in shadow at 66, extending intermediately from the
seat side members 40 and 42 to define a slidable pivot point for
the seat. The back frame 16 is secured by pivot pins extending
intermediately from the back section side members 54 and 56 and
pivotally connected to the terminal ends of the front legs 18 and
20 and arms 28 and 30. As a result of these pivotal
interconnections the exercising device functions as a chair when
upright and as a toggle cot when the seat and back frames are
disposed to a horizontal position, all as will be described
hereinafter in more detail. An electric cord, shown in shadow at
67, may be inserted to connect the rear brace member 46 to the
horizontal bar 26.
Referring to FIGS. 2-7 and 11, there are illustrated various
positions of the exercising chair 10 and components defining the
pivot connections for obtaining freedom of swinging movement of the
seat and back frames 14 and 16. In FIG. 2, the chair 10 is shown in
an upright position, and in that position serves as a comfortable
chair. Such a chair can be utilized as any other piece of
furniture, at a desk, in a den, or at pool side. As shown by the
dashed lines 64, and as more clearly illustrated in FIGS. 5 and 6,
the inner surface of the upper extent of each back leg 22 and 24 is
cut away to form a slot 64 which is curved following the line of
curvature of the leg 22 or 24 and which defines a channel 68. A
pivot pin 70 carries a Teflon roller 66 on one end and is welded to
a seat frame side member 40, 42 so that the roller 66 can be
slidably disposed within the channel 68. In place of a roller, one
can use a Teflon block which slides in the channel 68. The roller
66 is inserted within the channel 68 by means of a keyway 73 for
the pivot pin 70 leading into the slot 64 from the front of the leg
22 or 24. The front of the tubular legs 22 or 24 are then closed by
a cap 74. The slot 64 is formed with a hump 76 along its lower edge
toward the rear thereof so as to define a detent section 78. If a
block is used in place of the roller 66, one can incorporate
spring-loaded bullet stops within the channel to secure the chair
seat in a variety of reclining positions.
When the exerciser chair 10 is in an erect position as illustrated
in FIG. 2, the roller bearing is disposed in the detent section 78
with the pivot pin 70 behind the hump 76. The hump 76 prevents the
pivot pin 70 from moving forward under the usual forward-directed
forces occurring during a normal sitting posture, but when the seat
frame 14 is moved more forcefully to a forward direction, the pivot
pin 70 can and does ride over the hump 76 into the main portion of
the slot 64. When that occurs, the seat frame 14 can be displaced
to a forward position as illustrated in FIG. 3.
In this position, the roller 66 slides along the channel 68 until
it reaches the end of the slot 64, at which point the seat and back
frames 14 and 16 are formed in a line, somewhat beyond the stage
illustrated in FIG. 3. At that point, the seat frame 14 is moved to
its most forward position whereupon a toggle action is obtained and
the junction between the seat and back frames 14 and 16 rise to an
inverted V shape as shown in FIG. 4. The inverted V shape becomes
sharper under the movement of the user's body and is limited by the
suppleness of the user's body. During the increase of sharpness of
the inverted V disposition, the roller travels back toward the
detent section 78, but in practice does not come close to the
detent section. The exercise can be continued with the user flexing
his body down, displacing the pivot point as defined by the roller
alternately back and forth within the channel 68 causing a
succession of toggle actions to alternate V and inverted V
positions. If an elastic cord 67 is provided, its spring movement
aids in its return to an upright position.
The result is an exercise similar to that obtained by standard
toggle-cots, but there are several differences. In one difference,
it should be noted that the plane of toggle is somewhat offset from
horizontal, which allows the user to exercise while viewing a
television set, or the like. Furthermore, in this embodiment, only
the seat is displaced facilitating greater control by the user. As
a result of the slidable displacement of the pivot point, the
toggle action obtained is smooth and can be easily repeated. When
it is desired to reassume an upright position, the user may merely
move the top of his body forwardly, displacing the seat section 14
rearwardly until the roller pin 70 meets the detent hump 76.
Further movement rearwardly causes the pivot pin 70 to rise over
the hump 76 to be retained therebehind, securing the chair in an
upright position.
Referring to FIG. 7, the manner of interconnection of the seat and
back frame side members is illustrated with reference to seat and
back side members 42 and 56. The members 42 and 56 are formed with
openings aligned with a nylon washer 80 and a hollow cylindrical
spacer 82 is inserted through the openings and secured by a headed
bolt 84 and locking nut 86 so that the members 42 and 56 can freely
pivot.
Referring to FIG. 8, the interconnection between the front and rear
legs is illustrated with reference to the legs 18 and 22. The legs
18 and 22 are formed intermediately with openings aligned with a
nylon washer 88. The horizontal spacing bar 26 is formed with an
extension stud 90, threaded on its outer end and which is disposed
through the leg opening and washer 88, and is secured by a locking
nut 92.
Referring to FIG. 11, there is illustrated the pivotal connection
between the back frame 16 and the rear portion of the front legs as
shown with respect to leg 20 and back frame side member 56. The
back frame 16 is in common pivotal connection with the legs 18 and
20 and with the arms 28 and 30. Openings are formed through the
back frame side member 56, arm 30 and terminal end of the leg 20
and aligned with a Teflon washer 94 between the back frame 56 and
arm 30. The terminal end of the leg 20 is disposed within the arm
30 and a steel spring bar 96 is secured between the outer surface
of the leg 20 and inner surface of the arm 30, as will be described
hereinafter in more detail with respect to FIG. 10. Spacers 98 are
secured through the aligned openings in the back frame member 56,
Teflon washer 94, arm 30 and leg 20 by means of a headed bolt 100
and locking nut 102.
In order to facilitate use of the exercising chair 10, a footrest
104 is provided which can be extended from the front end of the
seat 14. Referring back to FIGS. 1-4, the footrest 104 is a
U-shaped member having tubular end members 106 and 108 of square
cross section and which slides within the seat frame side members
40 and 42. When the chair is in an upright position, the footrest
104 can be pushed rearwardly with the end members 106 and 108
entirely within the seat frame side members 40 and 42 so that the
footrest 104 does not extend outwardly from the seat frame 14. When
it is desired to utilize the chair as an exerciser, the footrest
104 may be extended simply by pulling outwardly thereon until a
stop has been reached, and this configuration is shown in FIGS. 3
and 4.
Referring to FIG. 9, a stop mechanism for the footrest 104 is
illustrated with respect to the end member 108. The terminal
portion of the end member 108 is formed with an opening 110 through
which extends a latch rod 112. The latch rod 112 is held by a
transverse member 114. A coil spring loads the latch rod 112 to a
position extending through the opening 110. The seat frame side
member 42 is also formed with an opening 118 which is aligned with
the footrest opening 110 when the footrest is in a fully extended
position. At that point, the coil spring 116 forces the latch bar
112 through the openings 110 and 118 stopping further outward
movement of the footrest 104. The footrest 104 can be released from
its locked position merely by pushing rearwardly thereon to rotate
the latch bar out of the opening 118. If it is desired to remove
the footrest 104 entirely, the latch bar 112 can be pushed up into
the end member 108 and held there with the finger while the
footrest 104 is nudged outwardly until the latch bar 112 passes the
seat frame opening 118.
Referring back again to FIG. 2 in conjunction with FIGS. 10 and 11,
another feature of this invention is illustrated. It is often very
desirable when engaging in the type of exercises afforded by the
toggle action of the present exercising chair to be able to also
exercise the pectoral muscles. By utilizing the present chair
construction, an exercising feature is provided which is not
otherwise available. In accordance with this embodiment, the arms
28 and 30 are spring loaded so that they may be moved inwardly
against the force of a strong spring and thereby provide exercise
of the pectoral muscles. Furthermore, the arms 28 and 30 may be
raised to an upright position so that the exercise can be
undertaken while the user assumes a reclined, back-arched posture.
In FIG. 2, the arm 30 raised to an upright position is shown in
shadow at 30' and a similar view is illustrated in FIG. 4. The
mechanism for accomplishing this action is illustrated in detail in
FIGS. 10 and 11.
Referring specifically to FIGS. 10 and 11, as previously indicated,
the leg 20 is disposed with its terminal end within the tubular
shell of the arm 30 and is pivotally secured to the back frame side
member 56 via a spacer 98 and Teflon washer 94, secured by a headed
bolt 100 and locking nut 102. The material constituting the outer
side 120 of the arm 30 is formed with an opening 122 through which
the spacer extends and is secured by the head of the bolt 100. The
material constituting the opposite inner surface 124 of the arm 30
is formed with an opening 126 which is substantially larger than
the opening 122. The rear portions of the Teflon washer 94 abut the
rear portions of the arm surface 124 adjacent the rear edge of the
opening 126; however, the opening 126 is offset with respect to the
spacer 98. As a result of this construction, the arm 30 can move
inwardly, as indicated by the arrow 128, to a position 30", the
opening 126 being wide enough to travel over the washer 94. The
rear edge of the opening 126 is also spaced sufficiently distant
from the spacer 98 to allow such movement.
As previously indicated, a steel spring bar 96 is secured within
the arm 30 so as to load the arm 30 against inward movement,
thereby providing the tension required to exercise the pectoral
muscles. The spring bar 96 is welded at its forwardmost end to the
inner surface of the inner arm side 124, as indicated at 130, and
extends from there to the spacer 98. An arched portion is cut away
from the far edge of the bar 96 so that the rear edge of the bar
abuts the spacer 98. It will be seen that as the arm 30 is moved
inwardly in the direction of the arrow 128, the rearward portions
of the spring bar 96 abut against the leg 20 and cause the bar 96
to bow.
Referring to FIG. 11, it will be seen that the top surface 130 of
the arm 30 is spaced a sufficient distance from the top edge 132 of
the leg 20 so that the arm 30 can be raised simply by rotating it
upwardly about the spacer bar 98. On the other hand, the arm 30 is
formed with a bottom surface 134 which, when the arm 30 is in a
horizontal position, abuts the leg 20 so as to prevent the arm 30
from dropping below that position.
Referring now to FIG. 12, it can be seen that by simply bending the
hinged pivot bars 36 and 38, the chair 10 can be readily folded
about its pivot joints and, with the arms 30 in an upright
position, the chair 10 can be readily moved.
As required, details of an illustrative embodiment of the invention
have been disclosed. However, it is to be understood that these
details merely exemplify the invention which may take forms
different from the specific illustrative embodiment disclosed. For
example, the mechanism can be incorporated into a non-folding
stuffed desk chair. Therefore, specific structural and functional
details are not necessarily to be interpreted as limiting, but as a
basis for the claims.
* * * * *