Exercise devices – Involving user translation or physical simulation thereof – Treadmill for foot travel
Reexamination Certificate
2000-03-21
2001-10-16
Richman, Glenn E. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Treadmill for foot travel
C482S051000
Reexamination Certificate
active
06302826
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a direct driving apparatus for an electric treadmill, and more particularly, to a apparatus which applies the brushless motor to enable a turning wheel to directly drive the roller of the running belt.
2. Description of the Prior Art
The treadmill is widely regarded as a practical indoor exercise apparatus with the best exercise effect. The electric treadmill has the speed-adjusting merit in accordance with different using requirements. The primary driving apparatus of a conventional electric treadmill, as shown in
FIG. 1 and 2
, includes a motor
12
with a reduction gear box. A belt transmission wheel or a toothed wheel
14
at the side of the roller
15
is driven by means of a belt or a drive chain
13
so that the roller
15
brings the running belt
16
in motion. The greatest disadvantage of the above-mentioned device is that the transmission of the belt or the chain
13
causes noise and vibration. Moreover, the power output axle
12
of the motor
12
rotates rapidly and its torsion is small so that the roller
15
can't be directly driven by the output axle. It's required that the speed of the output axle has to be reduced by means of the reduction gear and the gear
14
to increase the torsion for driving the roller
15
in motion. However, it can't be used as non-motorized treadmill at power failure or without power supply because the running belt
16
can't bring the roller
15
in motion. Additionally, the transmission members like belt or chain cause abrasion problem so that its life is shortened.
SUMMARY OF THE INVENTION
It is a primary object of the present invention to provide a direct driving apparatus for an electric treadmill which doesn't require a transmission belt, a belt transmission wheel or a drive chain, a toothed wheel so that low noise and vibration can be achieved.
It is another object of the present invention to provide a direct driving apparatus for an electric treadmill with low abrasion, high inertia force and long using life.
It is a further object of the present invention to provide a direct driving apparatus for an electric treadmill which can be as a motorized device when with power supply or a non-motorized device when without power supply or at power failure.
REFERENCES:
patent: 6042514 (2000-03-01), Abelbeck
Richman Glenn E.
Rosenberg , Klein & Lee
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