U.S. patent number 3,834,694 [Application Number 05/396,335] was granted by the patent office on 1974-09-10 for leg muscle exercise apparatus.
Invention is credited to Robert H. Pridgen.
United States Patent |
3,834,694 |
Pridgen |
September 10, 1974 |
LEG MUSCLE EXERCISE APPARATUS
Abstract
An apparatus for exercising the thigh, hamstring, and groin
muscles, including structure for applying a predetermined weight to
the upwardly extending leg to thereby stretch the hamstring and
thigh muscles of a person lying on his back. The weights are
attached to the person's upwardly extending ankle by use of a cord
and pulley system, and a one-way clutch enables the lifting of the
weights by use of a cord with the hands and arms, then transferring
the force of the weights to the leg to be exercised, thereby
relieving the arms of the task of applying the force to the leg. A
pair of pads are resiliently retained in laterally spaced relation
so that a person using the device may position the pads between his
knees and force them together against the resilient force to
exercise his leg and groin muscles. A lazy tong device connected to
the resilient arms has a curved plate adapted to engage the user's
abdomen to enable the user to apply greater resistance to movement
of the pads, as desired.
Inventors: |
Pridgen; Robert H. (Washington,
DC) |
Family
ID: |
23566804 |
Appl.
No.: |
05/396,335 |
Filed: |
September 11, 1973 |
Current U.S.
Class: |
482/102; 482/133;
601/34; 482/121 |
Current CPC
Class: |
A63B
21/157 (20130101); A63B 23/1209 (20130101); A63B
23/03575 (20130101); A63B 21/154 (20130101); A63B
21/4035 (20151001); A63B 23/0488 (20130101); A63B
21/4043 (20151001); A63B 21/4015 (20151001); A63B
21/06 (20130101); A63B 2208/0238 (20130101); A63B
21/023 (20130101); A63B 21/0455 (20130101); A63B
23/12 (20130101); A63B 21/0628 (20151001); A63B
21/4037 (20151001) |
Current International
Class: |
A63B
21/06 (20060101); A63B 23/04 (20060101); A63B
21/00 (20060101); A63B 21/02 (20060101); A63B
21/045 (20060101); A63B 23/035 (20060101); A63B
21/062 (20060101); A63B 23/12 (20060101); A63b
021/06 (); A63b 021/10 () |
Field of
Search: |
;272/58,90,81
;128/70,71,84R,25R |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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18,916 |
|
1895 |
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GB |
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334,255 |
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1930 |
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GB |
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Primary Examiner: Pinkham; Richard C.
Assistant Examiner: Taylor; Joseph R.
Attorney, Agent or Firm: Browne, Beveridge, DeGrandi &
Kline
Claims
I claim:
1. In a leg muscle exercising apparatus including a horizontal
platform upon which a user may lie in a supine position and an
upwardly extending stanchion at one end of said platform adapted to
support a harness assembly for applying lifting and stretching
forces to an upwardly lifted leg of the user lying on said
platform, the improvement wherein said harness assembly comprises,
pulley means rotatably mounted on said stanchion at a position
substantially above said platform, a first cord mounted on said
pulley means and having one end extending in the direction of said
platform in position to be grasped and pulled by said user, a
second cord having one end adapted to be connected to the raised
leg of said user, means connecting the other end of the second cord
to said first cord for movement therewith in a direction tending to
raise and thereby stretch the muscles of the user's leg when the
leg is attached to said second cord, manually energized moveable
force applying means, and means connecting said force applying
means to the other end of said first cord whereby manually pulling
on said one end thereof energizes said force applying means and
upon release thereof said force applying means applies a
predetermined force tending to raise the user's leg which is
attached to said second cord.
2. The leg muscle exercising apparatus as defined in claim 1
wherein said moveable force applying means comprises a plurality of
weight members superimposed on top of one another, and wherein said
means for releasably connecting said force applying means comprises
means for releasably connecting any one of the individual weights
to said first cord whereby the weights stacked thereabove are
constrained to move upwardly with the attached weights when said
one end of said first cord is pulled by said user.
3. The leg muscle exercising apparatus as defined in claim 2
wherein said stanchion is inclined upwardly and away from said
horizontal platform, and further comprises guide means for guiding
said weights along an inclined path along said stanchion.
4. The leg muscle exercising apparatus as defined in claim 1
wherein said means connecting said other end of said second cord
for movement with said first cord comprises one-way clutch means,
said pulley being operably connected with said clutch means.
5. The leg muscle exercising apparatus as defined in claim 4
wherein said one-way clutch means comprises first and second clutch
plate members mounted in opposed cooperating relation for rotation
upon a shaft mounted on said stanchion, said first clutch plate
having a groove around its outer periphery for receiving said first
cord to rotate said first plate, said second cord having its other
end connected to said second clutch plate for movement
therewith.
6. The leg muscle exercising apparatus as defined in claim 5
wherein said moveable force applying means comprises a plurality of
weight members superimposed on top of one another, and said means
for releasably connecting said force applying means comprises means
for releasably connecting any one of the individual weights to said
first cord whereby the weights stacked thereabove are constrained
to move upwardly with the attached weight.
7. The leg muscle exercising apparatus as defined in claim 6
further comprising strap means on said platform for releasably
connecting one of the user's legs thereto while the other is being
exercised.
8. A leg muscle exercising apparatus including a horizontal
platform upon which a user lies in a supine position and an
upwardly extending stanchion at one end of said platform adapted to
support a harness assembly for applying lifting and stretching
forces to an upwardly lifted leg of the user lying on said
platform, the improvement wherein said harness assembly comprises,
pulley means rotatably mounted on said stanchion at a position
substantially above said platform, a first cord extending over said
pulley means and having one end extending in the direction of said
platform in position to be grasped and pulled by said user, a
second cord having one end adapted to be connected to the raised
leg of said user, means connecting the other end of said second
cord to said first cord for movement therewith in a direction
tending to raise and thereby stretch the muscles of the user's leg
when the leg is attached to said second cord, weight means
positioned below said pulley means, and means for releasably
connecting said weight means to the other end of said first cord
whereby manually pulling on said one end thereof by the hand will
raise said weight means and upon release thereof said weight means
will apply a predetermined force tending to raise the user's leg
attached to said second cord.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to exercise apparatus, and more particularly
to an exercise device especially useful for athletes to exercise
weak or injured thigh, hamstring and groin muscles.
2. Description of the Prior Art
Numerous devices have been developed for assisting in the forced
exercise of the leg muscles, and particularly of the upper leg and
groin muscles. Such devices are frequently employed by athletes to
promote rapid recovery from injured muscles. Conventionally, these
prior art devices are intended to apply a force to the leg tending
to stretch the muscles by the forced lifting or bending of the legs
at the hip joint.
One prior art device for exercising the legs is illustrated in U.S.
Pat. No. 3,117,782. This device employs a harness consisting of a
system of cords and pulleys to enable a person to use the arm
muscles, while lying in a prone position, to stretch the leg
muscles. This is accomplished by applying force with the arms to
lift the legs and pull them toward the user's head as he lies on
his back. In this device, all of the force applied to or by the
legs must be derived from or resisted by the arms, and is very
fatiguing because of the awkward position required of the arms. In
the use of this prior art device, it is difficult, if not
impossible, to accurately estimate the amount of force applied.
This is particularly important when intentionally stretching an
injured muscle because of the risk of inflicting greater injury.
Further, neither this nor other prior art devices of which
applicant is aware has made adequate provision for exercising the
groin muscles which frequently become injured in strenuous athletic
contests such as football. Accordingly, it is a primary object of
the present invention to provide an improved leg muscle exercising
apparatus.
Another object is to provide an improved leg muscle exercising
apparatus which a person can employ without an assistant, and which
can be employed to reliably apply the desired tension or stress to
the hamstring and thigh muscles.
Another object is to provide such an apparatus which can be
employed to exercise the groin muscles while the person exercising
remains in a seated, comfortable position.
SUMMARY OF THE INVENTION
In the attainment of the foregoing and other objects, an important
feature of the present invention resides in the use of movable
weights to apply a direct load to the leg to thereby exercise the
hamstring and thigh muscles. This is accomplished by providing
means for lifting fixed weights with the arms by use of a pulley
and cord attached to the weights, then releasing the cord held in
the hand to permit the weights to apply a force, through a second
cord and harness assembly, to the leg. The device may use a one-way
clutch to shift the weight from the cord held by the athlete's hand
to the cord and harness attached to the leg, thereby assuring
relaxation of the leg muscles during the lifting of the weights.
The apparatus is used while the athlete is lying in a supine
position with the leg to be exercised raised and connected to a
harness including a cord extending over a pulley positioned above
and behind his head. The weights employed are located below the
pulleys and are attached to a cord extending over a second pulley
to a position to be grasped by the athlete's hands. The apparatus
includes a frame adapted to be positioned directly on the floor or
upon an exercise table, as desired.
The apparatus also includes a hairpin-shaped spring member having
outwardly projecting pads on the distal ends of the spring which
are adapted to be positioned between the athlete's legs, while in a
sitting position, with the pads engaging the legs in the vicinity
of the knee. While in the sitting position, the athlete moves his
legs toward and away from one another against the resistance of the
spring member, and the extent of the force or resistance of the
spring is varied by a lazy tong attachment including a bumper
member which engages the athlete's abdomen enabling him to exert
force resisting the closing movement of the pads on the spring.
BRIEF DESCRIPTION OF THE DRAWINGS
Other objects and advantages of the present invention will become
apparent from the following detailed description, taken in
conjunction with the drawings, in which:
FIG. 1 is a perspective view of the exercising apparatus according
to the present invention, with the groin muscle exercising portion
removed and with the manner of using the apparatus to exercise the
hamstring and thigh muscles being illustrated by a person shown in
phantom;
FIG. 2 is an enlarged, exploded, fragmentary view of a portion of
the apparatus shown in FIG. 1;
FIG. 3 is a further enlarged fragmentary view of the weight members
shown in FIG. 1; and
FIG. 4 is a perspective view illustrating use of the apparatus to
exercise the groin muscles.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings in detail, the exercise apparatus
according to the present invention is indicated generally by the
reference numeral 10 and includes a frame having a horizontal base
portion 12 and an upwardly inclined stanchion or head portion 14.
The frame is preferably made up of a length of steel tubing bent
and welded into the desired configuration with the generally
rectangular base portion 12 supporting a resilient pad or mattress
16 upon which a person lies while using the apparatus. A pair of
leg restraining straps 18, 20 are provided, one at each side of the
base portion 12 of the frame, adjacent the lower end thereof, for
restraining one leg, if desired or necessary, while exercising the
other leg.
As best seen in FIG. 1, the head portion 14 of the frame consists
of a pair of legs 18, 20 inclined upwardly and away from the head
of the user and joined at their apex in an arcuate section 22. A
horizontal structural angle member 24 extends between and is
rigidly welded to the legs 18, 20, near the base thereof, and a
second horizontal structural member in the form of a flat bar 26
extends between the legs 18, 20 at a point spaced substantially
above the angle 24. A pair of elongated guide rods 28, 30 are
slidably received in spaced openings in the bar 26 and angle 24,
and a plurality of weights 32, preferably in the form of
rectangular steel bars, are slidably mounted on the rods 28, 30 and
normally rest on the angle member 24.
A shaft 34 is mounted on and extends between legs 18, 20 at a
position above the bars 26 and rotatably supports a one-way clutch
assembly 36. Clutch assembly 36 comprises a pair of pulleys 38, 40
supported on the shaft 34 in close, face-to-face relation with a
plurality of spherical balls 42 mounted therebetween in tapered
arcuate grooves 44 on the face of pulley 40. Those elements are
shown in FIG. 2 in an expanded condition to more clearly illustrate
the operation of the device, it being understood that the pulleys
38, 40 are normally resiliently urged toward one another and
retained in closely spaced relation as illustrated in FIG. 1. The
structure and operation of the one-way clutch is conventional
except that the basic elements (pulleys) have a groove formed
around their outer periphery for receiving and guiding a cord
thereover.
A first cord 46 is positioned in the groove 48 of the pulley 38 and
extends downwardly therefrom through an elongated slot 50 in the
bar 26 to have its lower end attached to an elongated flat bar 52.
The bar 52 has a plurality of apertures 54 formed therein at spaced
positions along its length to receive a pin 56 which is adapted to
extend through a horizontal opening 58 in the weights 32 to thereby
releasably attach one or more of the weights to the bar 54. As seen
in FIG. 3, the weights have elongated vertical slots 60 extending
downwardly through the central portion to admit the end of the bar
52 so that, when the pin 56 is in position, pulling of the cord 46
in the direction of arrows 62 (FIG. 2) will cause the weights
attached to the bar 54 to slide upwardly along the guide pins 28,
30.
A second cord 66 is positioned within a groove 68 in the pulley 40
and has one end fixed, as at 70, to the pulley. The other end of
cord 66 is attached, by suitable connector means 72 to a pair of
cords 74, 76 adapted to be connected, through a hook 78 to a collar
80 adapted to fit around the ankle of the person using the device.
An adjustable bar 82 extends between the cords 74, 76 for
adjusting, within limits, the length of the harness assembly as
desired.
In order to use the device, a person positions himself in a supine
position on the pad 16 and positions the collar 80 over the leg to
be exercised. If desired, the other leg may be held down by the
straps 18, 20. The person then grasps the free end of the cord 46
and pulls, rotating the pulley 38 of the one-way clutch 36 to lift
the attached weight 32. The spherical balls 42 permit free rotation
of the pulley 38 relative to the pulley 40 in the direction of
arrow 62. Upon lifting the weight 32 to the desired height,
normally into contact with the bar 26, the user then releases the
cord 46 and the weight tends to rotate the pulley 38
counterclockwise. The spherical balls 42 immediately become wedged
in the tapered grooves 44 to lock the pulley 40 to the pulley 38 so
that any downward movement of the weight 32, acting through the
clutch assembly 36 and cord 66, will pull the attached leg upward,
applying a known, predetermined force to the leg stretching the
thigh and hamstring muscles. As the weight slides down the guide
rods 28, 30, thereby pulling the user's leg upward a fixed,
predetermined distance, the cord 46 will also be returned to its
original position. If desired, after the weight has fully receded,
the leg can be left in this position for a short time or,
alternatively, the arm can then be used to again lift the weight by
pulling on the cord 46. In this case, since the leg is initially in
a strained position, the pulley 40 will be rotated with the pulley
38 by the weight of the leg as applied through the cord 66. To
prevent dropping the leg too low, and to always apply the same
force and stretching action to the leg muscles, a stop member 84 on
pulley 40 is positioned to engage a rigid stop 86 on the frame 12.
Thus, when the leg is lowered to the point that the two stops are
in contact, any additional movement lifting the weight will result
only in the pulley 38 being rotated.
Referring now to FIGS. 1 and 4, it is seen that, at the foot end of
the frame 12, a socket 90 is rigidly mounted, as by a bracket 92 on
the tubular frame member 94. Socket 90 is adapted to telescopingly
receive and support the lower end of a rigid post member 96 which,
in turn, acts as a pivot and support for a groin muscle exercising
spring assembly 98.
The groin muscle exercising apparatus consists of an elongated
spring rod member 100 bent into a generally V-shaped configuration
with a single coil 102 at the apex of the V joining the two legs
104, 106, with the cord 102 being adapted to be received over the
upwardly projecting end of the post 96. The distal ends of the rods
104, 106 have mounted thereon a pair of resilient pads 108, 110
respectively adapted to engage the inside portion of the user's
thighs near the knees when the user is in a sitting position with
his legs outstretched and wide-spread. The opposed arms 104, 106
each have a bracket 112 mounted on their inwardly directed
surfaces, and a pair of bars 114 have one end mounted,
respectively, on the brackets 110. The bars 114 each have their
other end pivotally connected to a third bar 116 which, in turn, is
connected to a padded, curved bumper member 118 adapted to engage
the abdomen of the person using the device.
To exercise the groin muscles employing this apparatus, the user
positions himself either on the pad 16 or on the floor facing the
apparatus in the sitting position as illustrated in phantom in FIG.
4. With the legs spread wide apart and outstretched, the pads 108,
110 are compressed together slightly and positioned between the
thighs adjacent the knees so that the spring member 100 resiliently
urges the legs to the wide-spread position. At the same time, the
pad 118 is positioned against the abdomen and the user may grasp
the upwardly extending end of the post 96 in his hands. He then
moves his legs together against the resilient force of the spring
arms 104, 106 to exercise the groin muscles. Movement of the pads
108, 110 toward one another actuates the lazy tong-like bars 114,
116, pushing the pad 118 more firmly against the user's abdomen,
thereby increasing the resistance of the spring as the legs are
moved more closely together. If it is desired to apply greater
force tending to spread the pads 108, 110, the user can pull with
his arms on the post 96. Similarly, the force applied through the
lazy tong assembly can readily be varied, within limits, by flexing
or other movement of the abdomen. The procedure is repeated as many
times as necessary to adequately exercise the groin muscles.
It is apparent that various modifications of the above-described
apparatus could readily be made without departing from the true
nature of the invention. For example, coil springs or the like
could readily be substituted for the illustrated weights for
applying the force to the cord 66, and resilient spring means or
stop means could be employed in place of the lazy tong mechanism
for varying the force required to compress or deflect the spring
member 100. Accordingly, while I have disclosed and described a
preferred embodiment of my invention, I wish it understood that I
do not intend to be restricted solely thereto, but that I do intend
to include all embodiments thereof which would be apparent to one
skilled in the art and which come within the spirit and scope of my
invention.
* * * * *