Exercise devices – Involving user translation or physical simulation thereof – Stair climbing
Reexamination Certificate
2002-02-08
2003-11-25
Crow, Stephen R. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Stair climbing
C482S057000, C482S070000
Reexamination Certificate
active
06652423
ABSTRACT:
RELATED U.S. APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
The present invention relates generally to an exercise machine, and more particularly to a linking mechanism of the exercise machine.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a prior art exercise machine comprises a base
11
, a seat
13
mounted on the base
11
, a damping device
12
located in the seat
13
, an upright rod
16
mounted on the base
11
, a control panel
14
mounted on the upright rod
16
, a control knob
15
mounted on the upright rod
16
, two handles
18
pivoted with a shaft
17
, two crank arms
20
fastened to two rotary rods
19
of the damping device
12
, and two footrests
201
mounted on two linking rods
202
which are pivoted at one end with the handles
18
and at another end with the crank arms
20
. In operation, the two handles
18
are swivelled back and forth on the shaft
17
serving as a fulcrum. In the meantime, the linking rods
202
are swivelled back and forth on the crank arms
20
. Such a linking mechanism as described above is apt to cause operational imbalance of the prior art exercise machine in operation.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide an exercise machine with a linking mechanism which is designed to minimize the operational unstableness of the exercise machine.
The exercise machine of the present invention comprises a base, a damping device, an upright rod, a horizontal support rod, two handles, two footrests, two linking rods, a horizontal shaft, and two connection rods. The horizontal shaft is fastened in proximity of the bottom end of the upright rod and is provided at both longitudinal ends with the connection rod to facilitate the pivoting of the handles with the linking rods.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 5848954 (1998-12-01), Stearns et al.
patent: 5882281 (1999-03-01), Stearns et al.
patent: 6183398 (2001-02-01), Rufino et al.
patent: 6302825 (2001-10-01), Stearns et al.
patent: 6565486 (2003-05-01), Stearns et al.
Harrison & Egbert
High Spot Industrial Co., Ltd.
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