U.S. patent number 3,758,107 [Application Number 05/083,872] was granted by the patent office on 1973-09-11 for bicycle-type exercising apparatus with eccentric mounting.
Invention is credited to Jacobus Daniel Potgieter.
United States Patent |
3,758,107 |
Potgieter |
September 11, 1973 |
BICYCLE-TYPE EXERCISING APPARATUS WITH ECCENTRIC MOUNTING
Abstract
The invention is directed to a stationary exercising apparatus
of a cycle type whereby a person is cyclically raised and lowered
causing his weight to produce a restraint on his pedalling. The
apparatus comprises a frame on a base structure for tilting
movement in upward and forward, and also sideward directions. The
base structure has fixed handles mounted at the forward end thereof
to be grasped by a user of the apparatus. The frame has a saddle
for a user to sit on and a pair of connected pedals to be driven by
the user. Additionally, the frame is connected to the forward end
of the base structure by a universal type connection and is further
supported at its rearward end on a shaft driven by the pedals,
wherein the shaft is adjustably attached at an eccentric position
to a vertically and transversely disposed circular member which in
turn is rotatably supported on the rearward portion of the base
structure. The adjustable feature of the shaft attachment comprises
an elongated slot in the circular member radially extending from
the center thereof, wherein the shaft is adjustably mounted at any
selected position along the length of the slot. In this manner, a
user of the apparatus may experience varying degrees of being
raised and lowered when exercising with the pedals depending on
where the shaft is positioned. Arms extending from the frame and
engageably associated with the base structure control the extent of
sideward tilting of the frame.
Inventors: |
Potgieter; Jacobus Daniel
(Pretoria, Transvaal Province, ZA) |
Family
ID: |
25561506 |
Appl.
No.: |
05/083,872 |
Filed: |
October 26, 1970 |
Foreign Application Priority Data
Current U.S.
Class: |
482/63; 482/65;
482/57 |
Current CPC
Class: |
A63B
22/0605 (20130101); A63B 2022/0641 (20130101) |
Current International
Class: |
A63B
23/04 (20060101); A63b 023/04 () |
Field of
Search: |
;272/72,73,DIG.3
;280/229 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Oechsle; Anton O.
Assistant Examiner: Stouffer; R. T.
Claims
I claim:
1. An exercising apparatus comprising a base structure having a
front end and a rear end, an upright part at the front end of the
base structure mounting a handlebar in an adjustably fixable
position, a frame having a front end and a rear end tiltably
disposed on the base structure, a universal coupling connecting the
front end of the frame to the part on the front end of the base
structure for tilting moving of the frame in an upward and forward
direction and also in sideward directions relative to the base
structure, a saddle mounted on and towards the rear end of the
frame, a substantially vertically and transversely disposed
circular member supported on and located between roller elements on
the rear end of the base structure, pedals on a transverse spindle
journalled in bearings at an intermediate position of a
longitudinal part of the frame, a longitudinally arranged shaft
journalled in bearings attached to a lower rear portion of the
frame, a mechanism for driving the shaft from the transverse
spindle, a coupling on a rearwardly directed end of the shaft and
fixable to the circular member at any position between a centre
position and a maximum eccentric position; the arrangement being
such that a person, seated on the saddle for exercising purposes
and holding onto the handlebar with his hands, is required to
produce forces with his legs on the pedals for intermittently
raising and lowering of his body and the frame while the body of
the person is subjected to twisting actions by alternative tilting
of the frame in opposite sideward directions.
2. An exercising apparatus as claimed in claim 1 wherein the
adjustment of the fixing position of the shaft to the circular
member is along a radial slot provided in said member.
3. An exercising apparatus as claimed in claim 1 wherein braking
means is provided which comprises a disc fixed to the shaft and
brakeshoe means operatively engageable onto the disc and of which
the operation is controlled by control means mounted on the upright
part at the front of the base structure.
4. An exercising apparatus as claimed in claim 1 wherein a
downwardly directed arm is attached to the frame and provides a
downwardly extending portion engageable on a horizontal fixed part
of the base structure when the frame is in opposite sidewardly
tilted positions to control the extent of sideward tilting of the
frame.
Description
BACKGROUND TO THE INVENTION
Stationary cycle-type exercising apparatus are known. These known
apparatus generally have a rotatable part on which brake or other
friction loading is associated for restrainment. The body of the
person is not subjected to any particular additional movement
during the pedalling actions.
This invention relates to an improved exercising apparatus and more
particularly an exercising apparatus of a kind incorporating foot
operated pedal devices which is operated after the fashion of a
cycle.
According to the invention an exercising apparatus is provided
which includes a base structure, a frame tiltably supported on the
base structure and having saddle means, a circular member rotatably
carried by the base structure, a mechanism driven by the pedals for
driving the rotatable member, and connecting means between the
frame and the said rotatable part whereby a person on the saddle
for exercising purposes is required to produce a force with his
legs for intermittently raising of his body supported on the saddle
and frame.
With the rotatable member means may be associated whereby the
moment of inertia of the rotatable member and/or its resistance to
rotation may be varied.
The said frame is tiltable in a upward and forward direction.
Preferably said frame is also mounted for sideward tilting. When
sideward tilting takes place stop means are provided to limit the
extent of lateral tilting of the frame and associated parts. Such
stop means can be adjustable to vary the extent of maximum lateral
tilting in opposite directions.
The extent of upward and forward tilting is preferably also
adjustable whereby the effort required from the person for each
lifting action may be varied.
The apparatus preferably provides handles for engagement by the
hands of the person using the apparatus. The handles are
advantageously fixed but are nevertheless adjustable to suit people
of different body and/or arm lengths. The adjustability of the
handles may be vertically, towards and away from the saddle means,
and/or the spacing between handgrip parts thereof. The handgrip
parts may be separately adjustable relative to longitudinal and
transverse axes of the apparatus and includes means for locking.
The saddle is also upwardly and downwardly adjustable. In addition
the saddle may be adjustable in a forward and rearward
direction.
More particularly an apparatus according to the invention comprises
a base structure having a front and a rear end and an upright
handle bar mounting part at the front, a frame tiltably supported
on the base structure and having a front end connected to the front
upright part of the base structure by a universal pivot connection,
a substantially vertically disposed circular member supported on
and located between roller elements on a rear part of the base
structure, pedals on a transverse spindle which is journalled on an
intermediate portion of the longitudinal part of the frame
forwardly of an upwardly extending saddle carrying part of the
frame and adapted to drive a shaft journalled in bearing means
attached to the frame, and a coupling arrangement whereby the rear
end of the shaft is fixed to the circular member for applying
rotational movement to said member, the fixing of the shaft to the
rotational member being variable from a centre position to a
maximum eccentric position. The adjustment of the fixing position
of the shaft to the circular member is in a radial direction from
the centre towards the periphery of the member. Suitable locking
means are provided for locking the connection of the shaft to the
circular member in any position between the limits.
On the shaft an additional disc may be provided on which a brake
shoe is operative which in turn is operated by control means
mounted on the front of the apparatus.
The means for limiting the extent of tilting of the tiltable frame
in a sideward direction comprises a downwardly extending arm-like
part attached by a portion to the tiltable frame whereas a lower
portion thereof engage sides of a rigid part or spaced parts of the
base structure. The clearance between the lower portion of said
arm-like part and the base structure may be adjustable in order to
vary the extent of sideward tilting of the tiltable frame and
associated parts.
Due to the eccentrically adjustable fixing of the shaft to the
circular member, rotary motion applied to the shaft through the
pedals causes rotation of the member and simultaneously the
alternative raising, lowering and sideward displacement of the rear
end of the tiltable frame. The downward movement of the frame and
the person is gravitational. By providing a direct drive mechanism
from the spindle to the shaft the person exercising on the
apparatus may restrain such downward movement by applying downward
foot pressure on the pedals during their upward moving cycles.
The saddle is mounted on a post extending upwardly and preferably
adjustably from the saddle carrying part of the tiltable frame.
Due to the handle bars being stationary during use of the
apparatus, and the sideward tilting of the saddle, numerous upper
muscles of the user are exercised in addition to the muscles used
for pedalling and back-pedalling. The handle bars, which are
adjustable as aforesaid, are conveniently mounted on a front
upright part of the base frame to which the front end of the
tiltable frame is swivelably connected.
The invention also extends to a method of exercising on a
cycle-type apparatus which includes the steps of employing the
weight of the person exercising to produce a restraint on his
pedalling. Restraint may be provided by causing the person
exercising to be raised and lowered cyclically.
For the invention to be clearly understood and to be carried into
effect, reference will now be made to the accompanying
drawings.
In the drawings:
FIG. 1 is a pictorial view of an exercising apparatus constructed
according to the invention;
FIG. 2 is a side elevation of a preferred form of the exercising
apparatus, also constructed according to the invention;
FIG. 3 is a rear view of FIG. 2;
FIG. 4 is a sectional elevation of the encircled portion IV of FIG.
2, drawn to a larger scale;
FIG. 5 is a fragmentary view in direction V of FIG. 4 with an
encasement cover removed; and
FIG. 6 is a fragmentary sectional elevation on line VI -- VI of
FIG. 4.
The exercising apparatus comprises a base frame-like structure 10
having longitudinal members 10.1 and transverse parts 10.2, the
latter having short legs 10.3 on which the apparatus is supported
on a floor. The structure 10, which is of tubular construction,
provides on the front end an upright tubular element 10.4 having a
clamp element 12 on the upper end. In the clamp element 12 and the
tubular element 10.4 a shank portion 14 of a handle arrangement 16
is received and fixed in adjustable fashion. The handle arrangement
16 provides a handle bar 18 having handgrip parts 20 on the ends.
Said handle bar 18 is adjustably fixed by clamp means 22 on the
shank portion 14.
On the rear of the structure 10 substantially horizontally disposed
rollers 24 are freely rotatably mounted in a frame portion 26 of
the structure 10. Between the rollers 24 a wheel 28 is rotatably
and substantially vertically located.
On the base structure 10 a tubular frame 30 is supported. The front
end of the frame 30 is connected to part 10.4 of structure 10 by a
universal kind of swivel connection 32. On the rear of frame 30 a
steeply upwardly extending part 30.1 is provided having a clamp
device 34 on its upper end for clampingly holding the shank portion
36 of a mounting for a saddle 38.
On the frame 30 a gearbox 40 is fixed which locates a pair of
meshing bevel gears or the like (not shown) of known construction.
One of the bevel gears is fixed to a transverse spindle 42
journalled in the gearbox 40 and having on protruding end crank
arms 44. On each crank arm 44 a pedal 46 is provided. The meshing
bevel gear is fixed to the front end of a longitudinally arranged
shaft 48 which is journalled in the gearbox 40 and a bearing 50.
The bearing 50 is fixed to the frame 30.
In the wheel 28, more particularly in a hub of such wheel, a radial
slot 52 is provided which extends radially from the centre
position. The rear end of the shaft 48 is extended through the slot
52 and fixable in any position in the slot, that is centrally in
the wheel or at any eccentric position.
On the frame 30 a fork-like downwardly extending arm 54 is secured
of which spaced portions of the lower end embracingly engages with
clearance the longitudinal horizontal members 10.1 of the structure
10. The lateral clearance between the spaced portions of the arm 54
limits the extent of sideward tilting of the frame 30 relative to
the base structure 10".
In the form of the apparatus shown in FIGS. 2 to 6, which is
substantially similar to that shown in FIG. 1, the wheel 28 is
replaced by a disc 28.1 and the cage-like frame portion 26 by a
stationary annulus 26.1. The longitudinal horizontal members 10.1
are laterally spaced to present a gap between them, instead of
being secured against one another, for location between them of a
single limbed arm 54.1 which is suspended from the frame 30.
On the rear of frame 30 (FIGS. 2 and 4) a downwardly directed
member 56 is rigidly secured and in the lower part of which a
bearing 50.1 is housed. On the bottom end of the member 56 the arm
54.1 is suspended from a horizontal transverse pin 60 while the
free bottom end portion is located between the laterally spaced
members 10.1. At the position of the arm 54.1 the structure members
10.1 are provided with inwardly directed protrusions 62 terminating
in spaced relationship and presenting convergent faces 64. The arm
54.1 is located between said protrusions with small clearance and
is tiltable between them to a limited extent. In the sloping faces
of the convergently shaped ends 64 of the protrusions 62 rollers 66
are captively provided to facilitate the longitudinal movement of
the arm when the frame 30 moves to or from the maximum tilted
positions and when engaging on said protrusions 62.
On the gearbox 40 lugs 68 may be provided as an alternative
position of attachment of the arm 54.1. At a corresponding position
the structure members 10.1 must also be provided with additional
protrusions 62 and rollers 66 if provision is made for such
alternative position for the arm 54.1.
The annulus 26.1 presents a concave inner face. Between the annulus
and the circumference of the disc 28.1 balls 24.1 are provided, and
preferably captively located.
The rear end of shaft 48 is engaged in a radial slot 52 of the disc
28.1 and is fixed by a nut 70 which engages on a washer 72. On the
shaft 48 a shoulder 74 is provided against which the disc 28.1
become clamped.
The annulus 26.1 is mounted on a post 76 which is fixed by its
lower end onto the transverse structure parts 10.2.
Adjacent the rear end of the shaft 48 a disc 58 is fixed. On the
disc a brake shoe 78 is operative. The brake shoe 78 is mounted on
a lever 80 pivotally mounted on the member 56. The drawing of the
brake shoe onto a face of the disc is by the inner cable 82 of a
sheathed cable 84 by a hand or finger operated lever 86 mounted on
the part 10.4. On the member 56 an adjustably mounted brake shoe
78.1 is also provided.
On the fixed arm 88 of frame 30 a revolution counter 90 is mounted
preferably for recording purposes. Said revolution counter or the
like may drive a sheathed cable 92 for a recording device attached
to the part 10.4.
The locating and mounting of the wheel 28 or disc 28.1 on the
rollers 24 or balls 24.1 permits the wheel or disc to perform a
wobbeling action when rotated with the shaft coupled eccentrically
thereto.
On the annulus 26.1 a removable cover 96 is preferably
provided.
In operation a person requiring exercising on the apparatus adjusts
the saddle height and the handle bars to suit himself. The wheel 28
or disc 28.1 is set in motion by a pedalling action whereby the
person is caused to be intermittently raised or lowered. The wheel
or disc should preferably be rotated at a constant speed and this
requires the person to apply reversing downward pressures on the
pedals during the upwardly moving cycles of the pedals and during
his downward movement to restrain or retard his downward
gravitational movement. Muscles, not used for normal pedalling are
thus brought into action and are exercised. Due to the sideward
tilting of the frame the person is moved sidewardly thus bringing
further muscles into action when endeavouring to balance himself
while, when holding onto the stationary handles, his body is
subjected to twisting actions whereby more muscles are
exercised.
* * * * *