U.S. patent number 3,592,466 [Application Number 04/792,440] was granted by the patent office on 1971-07-13 for revolving step exerciser with adjustable slope.
Invention is credited to Billie D. Parsons.
United States Patent |
3,592,466 |
Parsons |
July 13, 1971 |
REVOLVING STEP EXERCISER WITH ADJUSTABLE SLOPE
Abstract
An upwardly and rearwardly sloping treadmill, having steps
thereon, mounted in a supporting structure for adjustment of the
slope of the treadmill. Fluid pressure means includes a control
valve and a pump operatively connected to the treadmill and
operated thereby to generate resistance of the treadmill against
working force applied thereto by the user.
Inventors: |
Parsons; Billie D. (Milesville,
SD) |
Family
ID: |
25156886 |
Appl.
No.: |
04/792,440 |
Filed: |
January 21, 1969 |
Current U.S.
Class: |
482/53;
482/1 |
Current CPC
Class: |
A63B
22/04 (20130101); A63B 22/0023 (20130101); A63B
21/008 (20130101) |
Current International
Class: |
A63B
22/04 (20060101); A63B 22/00 (20060101); A63B
21/008 (20060101); A63b 023/06 () |
Field of
Search: |
;272/69 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pinkham; Richard C.
Assistant Examiner: Dror; Richard
Claims
What I claim is:
1. A revolving step exerciser comprising:
a. a supporting structure including a pair of laterally spaced
generally vertical support frames, a cross brace member connecting
said support frames, and a cross shaft connected at its opposite
ends to said support frame;
b. a longitudinally sloping treadmill including,
1. a pair of laterally spaced parallel side members each disposed
adjacent a different one of said support frames,
2. a pair of lower front and upper rear parallel transverse shafts
connecting the side members, said lower front shaft being secured
to said support frames, said side members being journaled on said
lower front shaft,
3. wheel means on said transverse shafts,
4. an endless conveyor entrained over said wheel means between said
side members and including a plurality of longitudinally spaced
steps;
c. a rock shaft having opposite end portions journaled in said side
members in spaced parallel relation to said cross shaft;
d. a rock arm secured at one end to said rock shaft and projecting
radially therefrom, said rock arm having a slot therein through
which said cross shaft extends, said slot being elongated in a
direction transversely of said cross shaft;
e. adjustment means for imparting rocking movement to said rock
shaft to move said side members relative to said cross shaft and
about the axis of said lower front transverse shaft, whereby to
vary the slope angle of the treadmill relative to the supporting
structure;
f. and means for applying a load on the treadmill against movement
of said conveyor relative to said supporting structure.
2. The revolving step exerciser according to claim 1 in which said
adjustment means comprises a lever arm having one end fixed to said
rock shaft adjacent one of said side members, and a quadrant and a
releasable quadrant engaging member, one on said adjacent side
member and one on said lever arm, for releasably locking said lever
arm in desired set angular positions of the treadmill.
Description
BACKGROUND OF THE INVENTION
Exercisers, such as those operating in the manner of bicycles,
rowing machines, and the like, are well known, many of these having
means for varying resistance to the muscular efforts applied
thereagainst by the user, for the purpose of improving physical
fitness, athletic training and the like. It is recognized that
walking and hill climbing are not only highly beneficial in
strengthening leg muscles but are also valuable in improving the
physical tone of a person's body generally. Treadmills are also
well known, as being means for operating mechanical devices of
various types.
SUMMARY OF THE INVENTION
An important object of this invention is the provision of an
exerciser which operates in the manner of a treadmill, and which is
quickly and easily adapted for use by persons of various
weights.
Another object of this invention is the provision of an exerciser
which is highly effective in the strengthening of a user's leg
muscles and improving general physical fitness.
Still another object of this invention is the provision of an
exerciser which requires no outside power, other than that of the
user, for its operation.
To the above ends, I provide a revolving step exerciser comprising
a supporting structure, a step-equipped treadmill sloping upwardly
and rearwardly relative to said supporting structure, means for
adjusting the slope of the treadmill, a fluid pump operated by the
treadmill, and valve means for controlling the flow of fluid
discharged by the pump to vary the resistance of the treadmill to
user-imparted movement thereof.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view in side elevation of a revolving step exerciser
produced in accordance with this invention, some parts being broken
away;
FIG. 2 is a view in front elevation, as seen from the left to the
right with respect to FIG. 1;
FIG. 3 is a longitudinal section taken substantially on the line
3-3 of FIG. 1;
FIG. 4 is a transverse section taken on the line 4-4 of FIG. 2;
FIG. 5 is an enlarged fragmentary view in top plan of an instrument
forming portion of the exerciser;
FIG. 6 is an enlarged fragmentary view in perspective of one of the
steps of this invention;
FIG. 7 is an enlarged fragmentary section taken substantially on
the line 7-7 of FIG. 2; and
FIG. 8 is a view, partly in diagram and partly in section of a
fluid pressure system of this invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
A supporting structure comprises a pair of laterally spaced
triangular support frames 1 and 2, preferably made from rigid
metallic tubing, and each including a horizontal base portion 3,
upwardly converging front and rear leg portions 4 and 5
respectively, connected at their lower ends to the front and rear
ends of their respective base portion 3, and a side strut 6
extending angularly forwardly and upwardly from the rear end of its
respective base portion 3 and welded or otherwise rigidly secured
to its respective front leg portion 4. A rear cross brace member 7
is rigidly secured at its opposite ends to the rear end of each
base portion 3.
An upwardly and rearwardly sloping treadmill, indicated generally
at 8, comprises a pair of elongated rearwardly and upwardly sloping
platelike side members 9 and 10 disposed in laterally spaced
parallel relationship and each disposed laterally outwardly of a
respective one of the support frames 1 and 2. The treadmill further
includes a lower front transverse shaft 11 extending transversely
through the lower front end portions of the side members 9 and 10
and an upper rear transverse shaft 12 journaled in bearings 13 in
the upper rear end portions of the side members 9 and 10, a pair of
laterally spaced drive sprocket wheels 14 keyed or otherwise
rigidly mounted on the shaft 12, a pair of laterally spaced idler
sprockets 15 journaled on the shaft 11, and an endless flexible
conveyor 16 carried by the sprocket wheels 14 and 15. The conveyor
16 comprises a pair of endless link chains 17 each entrained over a
different aligned pair of sprocket wheels 14 and 15, and a
plurality of steps 18, each step 18 being in the nature of an
angular transverse member formed to provide a normally generally
horizontal tread portion 19 and a normally generally vertical riser
portion 20. The opposite ends of each tread portion 19 are provided
with pairs of rigid mounting arms 21 pivotally secured at their
outer projected ends 22 to the link chains 17, as indicated at 23,
see FIG. 7. In like manner, each riser portion 20 is provided at
its opposite ends with a pair of rigid mounting arms 24 having
their extended end portions 25 pivotally connected to the link
chains 17 at the pivotal connections 23 of an adjacent pair of
mounting arms 21. Each step 18 is reinforced by one or more gussets
26, see FIGS. 4 and 7. The link chains 17, being entrained over the
sprocket wheels 14 and 15, define upper operating flights 27 and
lower return flights 28, the steps 18 on the return flights 28
being inverted relative to those on the operating flights 27. The
treadmill 8 further includes a pair of laterally spaced handrails
29 disposed adjacent opposite ends of the steps 18 and formed to
provide legs 30 that are suitably anchored at their lower ends to
inturned flanges 31 on the side members 9 and 10. The handrails 29
are further supported by brace members 32 also rigidly secured to
the inturned flanges 31, and to the handrails 29. A cushion or
padded hood 33 is mounted on the upper rear end of the treadmill 8
by means of mounting brackets or the like 34 bolted or otherwise
rigidly secured to end wall portions 35 of the hook 33 and to
adjacent ones of the treadmill side members 9 and 10.
Means for mounting the treadmill 8 in the frame structure including
the support frames 1 and 2, comprises the lower front shaft 11, a
cross shaft 36 connected at its opposite ends to the connected
upper ends of the leg portions 4 and 5 of each support frame 1 and
2, a transverse rockshaft 37 having opposite end portions journaled
in the side members 9 and 10 and disposed in spaced parallel
relationship to the cross shaft 36, and a pair of laterally spaced
rock arms 38 each rigidly secured at its inner end to the rockshaft
37 and having a slot 39 at its outer end through which the cross
shaft 36 extends, see particularly FIG. 4. Means for imparting
rocking movements to the rockshaft 37, to vary the angular or
sloping disposition of the treadmill 8 comprises a lever 40 rigidly
secured at its inner end to the rockshaft 37 adjacent the laterally
outer surface of the side member 9 and a toothed quadrant 41
rigidly secured to said outer surface of the side member 9 for
engagement with a conventional releasable locking mechanism 42 on
the lever 40. With this arrangement, the slope of the treadmill may
be varied to suit the operator's needs. It will be noted, with
reference to FIG. 3, that the lower front end portions of the side
members 9 and 10 are provided with bearings 43 which journal the
treadmill 8 at its lower front end on the lower front shaft 11.
For the purpose of imparting a load to the conveyor 16,
fluid-pressure-operated means is provided, comprising a fluid pump
44, a fluid reservoir 45, and low-pressure inlet and high-pressure
outlet conduits 46 and 47 respectively connecting the pump 44 to
the reservoir 45, the pump and reservoir 45 being rigidly secured
to the treadmill side member 9. For the purpose of the present
example, the pump 44 is shown in FIG. 8 as being of the rotary vane
type, comprising a housing 48 defining a pump chamber 49, a rotor
50 journaled in the housing 48 eccentrically within the chamber 49,
and a plurality of circumferentially spaced radial vanes 51
radially slidably mounted in the rotor 50. The rotor 50 is mounted
on a pump drive shaft 52 disposed in spaced parallel relationship
to the upper rear treadmill shaft 12, and is connected thereto by
sprocket wheels 53 and 54 mounted on the shafts 52 and 12
respectively, and an endless link chain 55 entrained over the
sprocket wheels 53 and 54. Preferably, a relatively heavy flywheel
56 is mounted on the pump drive shaft 52 to aid in smooth running
of the apparatus.
The reservoir 45 is formed to provide a valve body portion 57
having a fluid passageway 58 therein that extends from the outlet
conduit 47 to the interior of the reservoir 45. The passageway 58
is normally closed by a valve element 59 slidably mounted in an
opening 60 in the valve body 57 and yieldingly urged toward a
valve-closed position by a coil compression spring 61 interposed
between the valve element 59 and the collar 62 of an adjustment
screw 63 that is screw threaded through a retaining or packing nut
64 screw threadedly received in the valve body portion 57, see FIG.
8. The passageway 58 is provided with a tapered portion 65 through
which fluid flows from the conduit 47 to the interior of the
reservoir 45 at a gradually increasing volume as the valve element
59 is moved against bias of the spring 61 away from its
valve-closed position shown in FIG. 8.
The inturned flange 31 of the side member 9 overlies the pump 44,
reservoir 45 and valve body portion 57, and provides an instrument
panel on which is mounted a spring-wound clock or timer, the dial
of which is indicated at 66, see particularly FIG. 5. A fluid
pressure indicator 67 is interposed in the conduit 47, and includes
an indicator dial 68 disposed adjacent the timer dial 66. The
adjustment screw 63 projects upwardly and outwardly through an
opening in the panel-forming flange 31 and is provided with a
control knob 69. Also mounted on the panel-forming portion of the
flange 31 associated with the side member 9 is a conventional
counter mechanism 70 having an actuator 71 that is adapted to be
engaged by suitable means, such as the steps 18, to indicate the
number of steps traversed by a person using the exerciser.
In use, as the operator mounts the steps 18 associated with the
operative flight 27, the weight of the user will cause the conveyor
16 to move, imparting rotation to the shaft 12 and consequent
operation of the fluid pump 44 in a direction to force fluid
through the conduit 47 toward the reservoir 45. Pressure of fluid
in the conduit 47 will be indicated on the dial 68, and will tend
to move the valve element 59 toward an open position against bias
of the coil spring 61. Should the operator's weight be insufficient
to impart downward movement to the operating flights 27 at a speed
equivalent to the operator's walking pace, the control knob 69 is
rotated in a direction to decrease bias of the spring 61 against
the valve element 59, whereby the valve element 59 will be opened
further under pressure of the fluid in the conduit 47 to permit
faster rotation of the pump rotor 50 and consequent forward and
downward movement of the operating flights 27. On the other hand,
should the user's weight cause the operating flights 27 to move
forwardly and downwardly at a speed greater than the operator's
desired walking speed, the control knob 69 is turned to effect
greater bias of the spring 61 against the valve element 59, to
increase the load on the pump 44. Thus, the exerciser is capable of
use by persons of various weights and walking speeds. By
manipulation of the lever 40, the slope or pitch of the treadmill 8
may be varied to a limited degree, to provide for different
climbing angles. Operation of the exerciser is completely dependent
on the weight and effort of the user, and requires no outside
source of power except that used by the timer 66.
* * * * *