Exercise devices – For foot or ankle
Reexamination Certificate
2001-11-14
2004-03-16
Donnelly, Jerome W. (Department: 3764)
Exercise devices
For foot or ankle
C482S080000, C482S051000, C482S052000
Reexamination Certificate
active
06705975
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a foot stepper exercise machine, and more particularly to a foot stepper that can be operated while a user is sitting.
2. Description of Related Art
The market is replete with exercise machines designed to exercise various muscle groups in a human body, and a stepper is one of the popular exercise machines.
A conventional stepper as shown in
FIG. 7
comprises a supporting frame (
50
), two treadles (
60
R,
60
L) pivotally secured on the supporting frame (
50
), two hydraulic presses (
55
) secured under the corresponding treadles, and two spinning devices (
65
a
,
65
b
) connecting between the supporting frame (
50
) and the treadles (
60
R/
60
L). The conventional stepper usually provides a form of aerobic exercises by simulating stair climbing. In such a machine, a user's body is repeatedly lifted by alternatively shifting the user's weight from one treadle to the other, each foot resting on its own treadle (
60
R/
60
L). As the weight is shifted to the treadle (
60
R/
60
L), the weight overcomes a resistive force from the hydraulic presses to move the treadle downward. In the conventional stepper, the treadles (
60
R/
60
L) are interconnected so that as one treadle (
60
R/
60
L) is pushed downward under the user's weight, the other treadle (
60
L/
60
R) is mechanically moved an equal distance in the opposite direction, i.e., upward. Repetitive stepping on and off by the user on each treadle (
60
R/
60
L) in a sinusoidal type reciprocating motion results in the aerobic exertion.
However, the conventional stepper has the following drawbacks:
1. When using the conventional stepper, the user has to stand on the treadles (
60
R,
60
L) so as to put the body's weight thereon to make the stepper work. Therefore, the conventional stepper can not be used when the user is in a sitting position.
2. The conventional stepper usually has a complex structure, especially in the spinning devices (
65
a
,
65
b
) for the treadles and other connecting devices between the spinning device (
65
a
,
65
b
) and the supporting frame (
50
) or the treadles (
60
R/
60
L). Therefore, the conventional stepper is time-wasting in assembly and has a high product cost.
The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional stepper.
SUMMARY OF THE INVENTION
The main objective of the present invention is to provide a foot stepper exercise machine that enables a user to use the foot stepper while sitting.
Another objective of the present invention is to provide a foot stepper exercise machine that has a simple structure.
REFERENCES:
patent: 4279415 (1981-07-01), Katz
patent: 4563001 (1986-01-01), Terauds
patent: 5256118 (1993-10-01), Chen
patent: 5346444 (1994-09-01), Hsieh
patent: 6024678 (2000-02-01), Solomon
Bacon & Thomas
Donnelly Jerome W.
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