Exercise devices – Involving user translation or physical simulation thereof – Treadmill for foot travel
Reexamination Certificate
1999-08-16
2001-01-09
Richman, Glenn E. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Treadmill for foot travel
C482S051000
Reexamination Certificate
active
06171216
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an angle-adjusting device for a treadmill supporting frame, and more particularly, to a compact, low-cost and easy-to-use device.
2. Description of the Prior Art
The prior art of U.S. Pat. No. 5,607,375, as shown in
FIG. 6
, is the most well known angle-adjusting device for a treadmill supporting frame. This prior art includes an engaging member
11
fastened on the rear supporting rod
10
, a plurality of stage type engaging bevel teeth
12
at the other end of the engaging member
11
, a pivot
13
by which the pivoted plate
15
at the bottom of the frame
14
is pivoted, a supporting member
17
pivoted by a pivot
16
under the pivoted plate
15
and a spring
20
hooked between an axle pin
18
disposed at the bottom end of the supporting member
17
and an opposed axle pin
19
of the pivoted plate
15
. At this time, any engaging bevel tooth
12
of the engaging member
11
is supported by the top portion
171
at the other end of the support member
17
and kept in position. Accordingly, in adjusting the sloping angle of the frame
14
, it's only required to raise the frame
14
to allow the rear supporting rod
10
to fall down automatically due to its weight by means of the pivot
13
. At this point, the engaging bevel tooth
12
at the other end of the engaging member
11
will be shift upwards to permit the next engaging bevel tooth
12
to be supported at the top portion
171
of the supporting member
17
. Therefore, the supporting angle of the rear supporting rod
10
is changed so that the sloping angle of the frame
14
is also changed.
Though this conventional product is easy to use, its structure is complex and has too many components. Thus, the production cost is relatively high and it can't meet the economical and efficient requirement of the industry.
SUMMARY OF THE INVENTION
It is a main object of the present invention to provide an angle-adjusting device for treadmill supporting frame that is compact, low-cost, easy-to-assembly and easy-to-use.
REFERENCES:
patent: 5672140 (1997-09-01), Watterson et al.
patent: 5897460 (1999-04-01), Mcbride et al.
Wang Leao
Wu Peter
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