Exercise devices – Involving user translation or physical simulation thereof – Treadmill for foot travel
Reexamination Certificate
2000-07-21
2002-08-13
Crow, Stephen R. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Treadmill for foot travel
Reexamination Certificate
active
06432026
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a height-adjustable mechanism for a running frame of a treadmill, and more particularly to such a mechanism having a gearbox and an output shaft at two sides driving a supporting rod for adjusting the height of the running frame.
2. Description of the Prior Art
A treadmill, as shown in
FIG. 1
, is an excellent exercise apparatus for the user to make a jogging exercise. Simply speaking, it is operated by a main motor (not shown) driving a belt (not shown) when then drives front and rear roller units so that a running belt
12
disposed around the roller units rotates. Therefore, the user can jog on the running belt in accordance with the rotation speed of the running belt
12
.
In order to increase the exercise fun of the treadmill, most treadmills are fitted with a height-adjustable mechanism for adjusting the angle of elevation of the running frame
14
to different slopes. As for the height-adjusting mechanism produced by current manufacturers, it is either manually or electrically operated. The manual mechanism is inconvenient while the electric one is complicated in configuration, and therefore impractical.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide a height-adjustable mechanism for a running frame of a treadmill which can enhance the using and operating convenience while decreasing the maintenance of the treadmill.
REFERENCES:
patent: 5352167 (1994-10-01), Ulicny
patent: 5372559 (1994-12-01), Dalebout et al.
patent: 5378212 (1995-01-01), Pin-Kuo
patent: 6254515 (2001-07-01), Carman et al.
Wang Leao
Wu Peter
Chiu Kuo-Hsiung
Crow Stephen R.
Troxell Law Office PLLC
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