U.S. patent number 3,917,262 [Application Number 05/438,396] was granted by the patent office on 1975-11-04 for leg exercising apparatus.
Invention is credited to Larry A. Salkeld.
United States Patent |
3,917,262 |
Salkeld |
November 4, 1975 |
Leg exercising apparatus
Abstract
An exercising apparatus of the leg-press type having foot pedals
which are pivotally suspended from a box-like frame. The foot
pedals are connected through mechanical linkage to a stack of
weights positioned for vertical movement to the side of the foot
pedals. An exerciser seated in a seat in front of the foot pedals
may exercise his legs against the foot pedals. The exerciser may
reach the weights from the seat.
Inventors: |
Salkeld; Larry A. (Monroeville,
PA) |
Family
ID: |
23740495 |
Appl.
No.: |
05/438,396 |
Filed: |
January 31, 1974 |
Current U.S.
Class: |
482/98;
482/137 |
Current CPC
Class: |
A63B
21/159 (20130101); A63B 21/0632 (20151001); A63B
23/0429 (20130101); A63B 23/03525 (20130101); A63B
21/0628 (20151001); A63B 23/0405 (20130101); A63B
2225/30 (20130101); A63B 2208/0238 (20130101) |
Current International
Class: |
A63B
21/06 (20060101); A63B 21/062 (20060101); A63B
23/04 (20060101); A63b 023/04 () |
Field of
Search: |
;272/58,81,84 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pinkham; Richard C.
Assistant Examiner: Taylor; Joseph R.
Claims
What is claimed is:
1. An exercising apparatus of the leg-press type comprising:
a. an upstanding box-like frame,
b. at least one pair of foot pedals,
c. a vertically positioned foot pedal supporting member fixed to
said foot pedals and pivotally mounted on a horizontal member
attached to said frame for pivoting about a horizontal axis,
d. a weight supporting means extending vertically through a
plurality of weights slideably mounted on said box-like frame for
vertical movement relative to said frame whereby a predetermined
number of said weights may be attached to said weight supporting
means for movement therewith,
e. linkage means pivotally mounted on said box-like frame
connecting said foot pedal supporting member and said weight
support means so that force exerted upon said foot pedals acts at a
mechanical disadvantage to raise said weight supporting means, said
linkage means consisting of a bellcrank pivotally supported by a
horizontal pivot means fixed to the top of said box-like frame, a
first rigid link pivotally secured at one end to the end of said
foot pedal supporting member and at the other end to said
bellcrank, and a second link pivotally secured at one end to the
opposite end of said bellcrank and pivotally secured at the other
end to said weight supporting means, and
f. a seat adjustably fixable to said frame in front of said foot
pedals whereby an exerciser seated in said seat may exert a force
upon said foot pedals to exercise his legs.
2. The apparatus of claim 1 wherein two pairs of foot pedals are
attached to said foot pedal supporting member so that each pair of
foot pedals provides a different mechanical disadvantage when
raising said weight supporting means.
3. The apparatus of claim 1 wherein all of the pivoting connections
are formed with self-lubricating bearings whereby said apparatus
requires no external lubrication.
4. The apparatus of claim 1 wherein said plurality of weights are
stacked one on top of the other to one side of said foot pedals so
that the exerciser, while seated in said seat, may adjust the
number of weights effectively attached to said weight supporting
member.
Description
BACKGROUND OF THE INVENTION
This invention relates to exercising apparatus for physical
development and muscular rehabilitation. The importance of physical
exercise to good health has long been recognized. The present
invention is directed to providing a compact leg exercising
apparatus which permits the user to obtain the beneficial results
of leg exercise. In my co-pending Patent Application, Ser. No.
171,525, now U.S. Pat. No. 3,820,782, filed on Aug. 13, 1971, and
entitled "Leg Exercising Apparatus," I disclose and claim an
exercising apparatus in which foot pedals move along a track to
raise a series of weights through a chain and sprocket
assembly.
While my earlier invention is useful in leg exercising development,
I have found that some maintenance problems have developed with the
chain and sprocket arrangement, notably the requirement for
lubrication of the chain and sprockets and the track along which
the foot pedals move.
The present invention utilizes a linkage between the foot pedals
and the weights. All of the pivoting points of the linkage are
formed with graphite impregnated nylon bearings so that they are
self-lubricating. The present invention provides a compact,
maintenance-free exercising apparatus.
SUMMARY
The present invention is directed to an improved exercising
apparatus wherein an exerciser seated in front of the apparatus may
bear against foot pedals that move the varying number of weights to
provide graduated exercise for the legs. The linkage connecting the
foot pedals and the weights is designed at a mechanical
disadvantage and is selflubricating and maintenance free.
With the foregoing considerations in mind, it is an object of the
present invention to provide an improved leg exercising
apparatus.
Another object of the present invention is to provide a leg
exercising apparatus which is substantially maintenance free.
These and other objects of the present invention will become
apparent as this description proceeds in conjunction with the
accompanying drawings.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front elevation of the leg exercising apparatus of the
present invention.
FIG. 2 is a side elevational section of the apparatus of FIG. 1
taken along line 2--2 of FIG. 1.
FIG. 3 is a schematic view of the linkage arrangement of the
present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to the drawings, there is shown a leg exercising
apparatus 10 having a box-like frame composed of front upright
members 12 and rear upright members 14. The upright members are
connected at top and bottom by cross members 16.
At the center of the front of the apparatus, an upright member 18
divides the front into two approximately equal sides. Extending
between center upright 18 and one front upright 12 is a horizontal
pivot 20. A foot pedal support member 22 is pivoted on horizontal
pivot 20 by a graphite impregnated nylon bearing. The foot pedal
support member 22 has two pairs of foot pedals 24 and 26 formed
integrally therewith. The foot pedals 24 are above the foot pedals
26 and, accordingly, foot pedals 24 provide a shorter lever arm
from pivot 20 and therefore require a greater force to move the
linkage as will hereinafter more fully appear.
At the top end of foot pedal support member 22, a link 28 is
pivotally connected to the support member 22 through a pivot
connection 30 formed with a graphite impregnated nylon bearing. At
the other end, link 28 is connected through pivot connection 32 to
a bellcrank 34. Again, a graphite impregnated nylon bearing is
utilized at the pivot connection 32.
Bellcrank 34 consists of an offset bellcrank arrangement having an
arm 34a which is connected to link 28. Arm 34a is rigidly fixed to
a tubular offset 34b extending across the front of the apparatus
10. Tubular offset 34b has fixed thereto a second arm 34c that is
laterally offset to the other side of center upright 18 as is best
seen in FIG. 1. The bellcrank 34 is pivotally connected to the
frame by pivot connections 36 at each end of the tubular offset
34b. These pivot connections 36 have a graphite impregnated nylon
bearing.
Arm 34c of bellcrank 34 is pivotally connected to link 40 through
pivot connection 38. Link 40 extends in a generally vertical
fashion to weight supporting means 44 to which it is connected by a
pivot connection 42. Pivot connections 38 and 42 are both formed
with graphite impregnated nylon bearings.
A plurality of weights 46 are stacked one on top of the other for
vertical movement along tracks 48. The tracks 48 are fixed to the
frame and the weights 46 slide up and down the tracks 48. The
weight supporting means 44 extends down through the stack of
weights 46 and, in conventional fashion, the weight supporting
means 44 has a plurality of holes formed therein. By properly
positioning a key pin through one of the weights and into the
weight supporting means 44, all of the weights above the pinned
weight are lifted when weight supporting means 44 is moved
upwardly. Thus, the positioning of the key pin enables the user of
the apparatus to vary the effective weight with which he is
exercising.
Extending from the front of the frame is a seat bar 50 as best seen
in FIG. 2. The seat bar 50 extends below the seat 52 which has a
telescoping tube 54 fixed to the bottom thereof. The seat 52 has an
upright support 52a which contacts the floor behind the seat. With
the telescoping tube, the distance between seat 52 and the frame of
the apparatus may be varied and then the distance may be locked by
use of key 56 which places through mating holes in the telescoping
tube 54 and the seat bar 50.
The linkage arrangement of the present invention has been designed
so that the weights 46 are lifted with a mechanical disadvantage to
the exerciser who pushes upon said pedals 24 or 26. This permits
fewer weights to provide the greater exercise which ordinarily
requires a greater number of weights. Further, by providing two
sets of foot pedals, 24 and 26, a greater variation in the amount
of weights which can be lifted is provided.
As viewed in FIG. 2, and also in the schematic representation of
FIG. 3, it may be seen that when the foot pedals 24 or 26 are
forced to the left as viewed in those figures, the foot pedal
support member 22 moves in a clockwise direction about pivot 20.
This movement causes the link 28 to be moved to the right and to
rotate arm 34a of bellcrank 34 in a counterclockwise direction
about pivot connection 36. The movement of arm 34a in the
counterclockwise direction causes the other arm 34c of bellcrank 34
to move in a counterclockwise direction thereby moving link 40
upwardly so that weight supporting means 44 is also moved
upwardly.
The unique linkage of the present invention permits the weights 46
to be within reach of an exerciser seated upon the seat 52. The
exerciser can operate the key pin for the weights in order to vary
the number of weights that will be lifted during each of his
exercising movements.
All of the pivoting connections of the present invention utilize
graphite impregnated nylon bearings so that they are maintenance
free, require no lubrication, and the entire apparatus is free of
oil dripping beneath it as so often occurs on present exercising
machines.
According to the provisions of the patent statutes, I have
explained the principle, preferred construction, and mode of
operation of my invention and have illustrated and described what I
now consider to represent its best embodiment. However, I desire to
have it understood that within the scope of the appended claims,
the invention may be practiced otherwise than as specifically
illustrated and described.
* * * * *