U.S. patent number 3,667,453 [Application Number 05/124,201] was granted by the patent office on 1972-06-06 for exercise chair.
Invention is credited to William G. Schenck, Earl T. Stark.
United States Patent |
3,667,453 |
Schenck , et al. |
June 6, 1972 |
EXERCISE CHAIR
Abstract
An exerciser is provided in the form of an armchair having a
body-carrying seat member mounted on the chair for rotary
reciprocating motion about a vertical axis relative to the chair
including its legs, back and arms. Power driving mechanism is
provided for effecting the rotary reciprocating motion of the seat
member so that a person sitting on the seat will have imparted to
his buttocks a movement which will exercise his leg muscles when
his feet are on the floor, his arm muscles when his arms or hands
are engaging the arms of the chair and his back muscles through his
arms or directly if his back is against the back of the
armchair.
Inventors: |
Schenck; William G. (Pompano
Beach, FL), Stark; Earl T. (Pompano Beach, FL) |
Family
ID: |
22413418 |
Appl.
No.: |
05/124,201 |
Filed: |
March 15, 1971 |
Current U.S.
Class: |
601/5; 601/87;
601/91; 601/26; 601/40; 601/35 |
Current CPC
Class: |
A61H
1/0292 (20130101); A61H 2203/0431 (20130101); A61H
2001/0203 (20130101) |
Current International
Class: |
A61H
1/02 (20060101); A61h 001/00 () |
Field of
Search: |
;128/24,25,33 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Trapp; L. W.
Claims
Having described our invention, we claim:
1. An exercising device comprising an armchair having a seat
portion, ground or floor-engaging means extending downwardly from
and carrying said seat portion, a back extending upwardly from said
seat portion, arm supports mounted above and at the sides of said
seat portion, a body-carrying seat member mounted on said seat
portion for movement about a vertical axis and power-driven means
for imparting reciprocal rotary movement to said seat member about
said vertical axis.
2. An exercising device according to claim 1 wherein the ground or
floor-engaging means is provided with adjustable means for varying
the distance of the seat portion above the ground or floor.
3. An exercising device according to claim 1 wherein the height of
the arms above the seat portion is adjustable.
4. An exercising device according to claim 1 wherein the height and
angle of the back relative to the seat portion is adjustable.
5. An exercising device according to claim 2 wherein the height of
the arms above the seat portion is adjustable.
6. An exercising device according to claim 1 wherein the ground or
floor-engaging means is provided with adjustable means for varying
the distance of the seat portion above the ground or floor, the
height of the arms above the seat portion is adjustable, and the
height and angle of the back relative to the seat portion is
adjustable.
7. An exercising device according to claim 1 wherein the
power-driven means comprises an electric motor, a crank pin rotated
in a circle, a drive pin carried by the body-carrying seat member
and a connecting link between the crank pin and drive pin.
8. An exercising device according to claim 7 wherein the connecting
link comprises two parts relatively slidable with respect to each
other and spring means for resisting relative sliding of one part
with respect to the other.
9. An exercising device according to claim 8 wherein the fixed seat
is provided with spaced bumpers and the movable seat member is
provided with means reciprocable between the bumpers to absorb
shocks due to change in direction of movement of the seat
member.
10. An exercising device according to claim 9 wherein the ground or
floor-engaging means is provided with adjustable means for varying
the distance of the seat portion above the ground or floor, the
height of the arms above the seat portion is adjustable, and the
height and angle of the back relative to the seat portion is
adjustable.
Description
This invention relates to an exercising device and more
particularly has reference to a device wherein a person can have
the muscles of his feet, ankles, legs, back, shoulders, arms,
wrists and hands exercised without the person positively on his own
behalf making any movements but by merely relaxing and in effect
resisting in varying degrees at his option, movements to the
various parts of his body, which are imparted thereto by a
power-driven device which imparts rotary reciprocatory movement
about a vertical axis to his buttocks.
Various exercising devices of a so-called passive body exercising
type have been developed wherein vibratory or oscillatory motion is
imparted to portions of a person's body while lying on a body
support. Another type of exercising device has been devised which
consists of a turntable on which the person desiring exercise must
stand and balance himself while motion is imparted to his feet.
Such a device tends to set the person's body in motion, and such
motion is resisted by the inertia of the person's body. This type
of device requires considerable ability of the person to balance
himself and to avoid being thrown from the turntable. Such type of
device obviously would be impractical and dangerous for use by
elderly or infirmed persons who probably have more need for the
exercise than a young person capable of balancing himself on the
turntable.
In accordance with the present invention, the exercising device is
in the form of an armchair in which the person to be exercised may
sit and relax with his feet on the floor, his arms and hands on the
arms of the armchair and if desired his back engaging the back of
said armchair. Exercising motion is transmitted to the buttocks of
the person sitting in the armchair by means of a seat having
reciprocating rotary motion about a vertical axis and to which
motion is imparted by means of a power-driven mechanism.
An object of the present invention is to provide an exercising
device which avoids the disadvantages of the prior art devices.
Another object of this invention is to provide an exercising device
wherein motion is imparted to the buttocks of a person sitting in a
chair and the various muscles of the person's ankles, legs,
shoulders, arms and hands are exercised by engagement of the
person's feet with the floor, his arms and hands on the arms of the
armchair and his back engaging the back of the chair.
Still another object of this invention is to provide a mechanism
which will impart to the buttocks of a person being exercised a
slow, rotary, reciprocatory motion through a small arc of
oscillation and at such a speed as to effectively exercise most of
the person's muscles without in any way endangering the person.
In order to more clearly understand the present invention,
reference is made to the accompanying drawings, wherein:
FIG. 1 is a perspective view of an armchair embodying the
principles of the present invention;
FIG. 1A is a fragmentary perspective view similar to that of FIG. 1
showing an embodiment having adjustable back and arm portions;
FIG. 2 is a cross-sectional view taken on line 2--2 of FIG. 1;
FIGS. 3 and 3A are similar views taken on line 3--3 of FIG. 1;
FIG. 4 is a cross-sectional view taken on line 4--4 of FIG. 2;
FIG. 5 is a cross-sectional view taken on line 5--5 of FIG. 3 with
parts of the mechanism in one position;
FIG. 5A is a view similar to that of FIG. 5 with parts of the
mechanism in a different position; and
FIG. 6 is a fragmentary sectional view of the linkage taken on line
6--6 of FIG. 5A.
Referring to the drawings, an embodiment of the invention is shown
wherein an armchair is depicted having a seat portion 1 supported
by ground or floor-engaging means in the form of legs 2. The legs 2
may be interconnected by rungs or bracing members 2a to impart
rigidity to the ground or floor-engaging means. The lower ends of
the legs are provided with feet members 3 which are carried by
threaded studs 4 which are threadedly received in interiorly
threaded recesses. By screwing the studs into or out of the
threaded recesses, the effective length of legs 2 can be
individually adjusted for raising or lowering the elevation of the
seat portion 1 or for leveling the chair.
As shown in FIG. 1, the seat portion 1 has a back 5 extending
upwardly therefrom. Back 5 can be of the conventional chair back
construction but for purposes of illustration it has been shown as
comprising two upstanding posts or members 6 with cross members 7.
Only one cross member has been shown in FIG. 1 to better illustrate
the body-carrying seat member 8, but obviously as many back cross
members as desired or necessary may be employed.
Posts 6 serve as supports for the rear ends of arms or arm supports
9. As shown, arms 9 are carried at their forward portions by posts
or upstanding members 10 of any desired shape or design. Of course
if desired arms 9 and members 10 can be integral.
Actually the chair structure so far described may be of any of the
many well-known designs and conventional chairs can be modified to
embody the features of the present invention.
According to this invention reciprocatory rotary motion is imparted
to the buttocks of a person using the exerciser. For this purpose
the body-carrying seat member is mounted on the seat portion 1 of
the chair by means of a center pivot pin or bolt 11 provided with a
head 12 and a threaded body which passes through the body-carrying
seat member 8 and the seat portion 1. A nut 12a is threaded on body
11 to retain the bolt in position. A concentric annular bearing 14
is interposed between seat member 8 and seat portion 1. Bearing 14
is of the thrust type and includes races with interposed balls.
Actually the bearing 14 is of a well-known type and is formed of
two sheet metal discs 14a and 14b which are shaped to provide ball
races 14c and 14d which receive balls 14e which are embraced by an
annular cage or retainer 14f. The center of discs 14a and 14b are
provided with registering openings through which a boss 14g passes.
This boss is provided with an upper head and the lower end is
pressed outwardly to secure the two discs 14a and 14b together.
Upper disc 14a is provided with ears on its outer periphery through
which screws 14h pass into the seat member 8. Lower disc 14b is
provided with ears through which bolts 14i pass to secure the lower
disc 14b to the seat portion 1.
Bolt 11 as previously mentioned passes through the boss 14g and the
seat portion 1 and serves as a safeguard to maintain the assembly
together.
This structure provides an assembly which fully supports the weight
of a person and yet may be driven in reciprocating rotary motion by
a low-powered electric motor 13.
As shown in FIG. 1, motor 13 is provided with a cord 15 equipped
with a plug 15a for connection to an electric plug receptacle. A
bracket 16 serves to mount the motor on the under side of seat
portion 1 of the chair. Drive shaft 17 of the motor 13 extends
upwardly through the bracket 16 and carries a drive wheel 18
provided with an upstanding crank pin 19.
The reciprocable rotatably mounted seat member 8 carries a drive
pin 20 which extends downwardly through seat 1 and is rigidly
secured in position by a boss 21 having a flange 22 which is
anchored to the under side of the seat member 8 by bolts 23 or
other attaching means. Pin 20 extends through an arcuate slot 24 in
the stationary seat portion 1 of the chair. Slot 24 is of a width
and length to permit the pin 20 to freely reciprocate therein.
Reciprocatory rotary motion is imparted to the seat member 8 by a
connecting rod or link 25 which is connected at one end to the
crank pin 19 on the wheel 18 and at its other end to the drive pin
20. Since the weight of a person sitting on seat member 8 may be
several hundred pounds there will be considerable inertia resisting
change in direction of movement of seat member 8. To offset the
undesirable effect on the mechanism the connecting rod or link 25
comprises two relatively sliding parts, 25a which is connected to
crank pin 19, and 25b which is connected to drive pin 20 of the
seat member 8. While link 25 may be constructed in various manners
by way of example part 25b is generally U-shaped in cross section
and as shown in FIGS. 5A and 6 has the free edges 26 of the flanges
27 turned under the part 25a so as to embrace part 25a. This
construction enables part 25b to freely slide relative to part
25a.
As shown in FIGS. 5, 5A and 6, part 25a is provided with a
longitudinal slot 28 through which pin 20 may freely slide and a
second longitudinal slot 29 through which a pin or post 30 carried
by part 25b may freely slide.
A pair of spaced posts 31 and 32 are carried by part 25a and extend
downwardly between the inturned edges 26 of flanges 27.
Tension springs 33 and 34 extend between post 30 and posts 31 and
32 as clearly shown. Springs 33 and 34 tend to maintain post 30
midway between posts 31 and 32 and are selected of appropriate size
and force to enable seat member 8 to be driven in reciprocatory
rotary motion with minimum shock to the drive mechanism and the
chair.
It has been found that even with the above-described construction
of the link 25, particularly with a heavy person, it is desirable
to provide a shock-absorbing mechanism for reducing the shock of
reversal of the direction of movement of seat 8. Such
shock-absorbing mechanism may be constructed as shown in FIGS. 3,
3A and 4 wherein a pin or post 35 carried by seat member 8 extends
downwardly through a second arcuate slot 36 in seat portion 1 of a
width to enable post 35 to freely reciprocate therein. At each end
of slot 36 bumpers 37 are provided which are carried by brackets 38
mounted on seat portion 1. Springs 39 resist movement of bumpers 37
when engaged by post 35 as shown in FIG. 3A.
Motor 13 is a so-called gear motor, that is a motor with a built-in
reduction gear. While any speed suitable for the purpose may be
used, it was found that when shaft 17 had a speed of 30 r.p.m. the
seat member 8 had an oscillatory motion that was very
satisfactory.
To enable the exercise chair to be used by persons of different
sizes the legs are provided with adjustable devices 3, 4 to vary
the height of seats 1 and 8 from the floor as previously described.
Other adjustments for the arms and back are provided as shown in
FIG. 1A. In this figure, back 5a has cross members 7a the lower one
of which is attached by bolts and thumb screws 41 to one side of a
piano or other suitable hinge 42, the other side of the hinge being
attached to seat 1. Hinge 42 makes it possible to adjust the angle
of the back 5a relative to seat 1. Slots 43 are provided in hinge
42 through which studs carrying thumb screws 43a extend to permit
vertical adjustment of back 5a relative to seat 1.
Arms 9a have angle brackets 44 attached to the forward under side
thereof. The vertical arms of brackets 44 are provided with slots
45 through which studs 46 carried by posts 10a extend and which are
provided with thumb screws 47 to enable the brackets to be secured
in vertically adjusted positions to the posts 10a.
The rear of arms 9a are secured to back 5a by hinges 48. One part
of each hinge 48 is fixed to back 5a and the other parts are
provided with slots (not shown) similar to slots 45 to enable the
back to be tilted to various angles and secured to the rear
portions of arms 9a by thumb screws 49.
With various adjustments shown in FIG. 1A the chair can be adjusted
to accommodate various-sized persons and enable them to enjoy the
benefits of the exercise chair.
Only the bare essentials of the exercise chair have been shown and
described but quite obviously the "chair" may be upholstered and
decorated as desired to make pleasing in appearance as well as
useful. Also seat 8, arms 9, 9a and back 5, 5a may be padded,
fitted with cushions or suitably upholstered to ensure maximum
comfort to a person using the same.
It has been found that an exercise chair constructed as herein
described enables a person sitting on a chair of appropriate size
or an adjustable chair adjusted to their size to obtain exercise of
various portions of their body. For instance, when sitting on seat
8 while the motor 13 is energized the person's buttocks has rotary
reciprocating motion imparted thereto. By pressing their feet on
the floor, the muscles of their feet, legs and buttocks will tend
to resist the rotary reciprocatory motion with consequent exercise
of the various muscles.
Upon pressing their arms on arms 9, 9a or by gripping arms 9, 9a
with their hands the muscles of their hands, arms, shoulders and
back may be exercised.
Similarly by varying the pressure of the person's back on back 5,
5a of the chair, back muscles, etc., will be exercised.
* * * * *