Exercise devices – Involving user translation or physical simulation thereof – Treadmill for foot travel
Reexamination Certificate
2000-06-16
2001-12-04
Richman, Glenn E. (Department: 3764)
Exercise devices
Involving user translation or physical simulation thereof
Treadmill for foot travel
C482S051000
Reexamination Certificate
active
06325745
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a jogging machine, and more particularly to a foldable jogging machine which is provided with a trotting platform capable of being set in an upright position to facilitate the storage of the jogging machine.
BACKGROUND OF THE INVENTION
The conventional electric jogging machine comprises a support frame and a trotting platform. The support frame is formed of a base and a support body extending upward from the base. The two opposite sides of the front end of the trotting platform are fastened pivotally with the support body. The underside of the rear end of the trotting platform is provided with two feet in contact with the floor surface. The conventional jogging machine is folded by lifting the rear end of the trotting platform, which is then turned on the two pivoting points of the front end of the trotting platform to join with the support body. The center of gravity of the conventional electric jogging machine is relatively high in view of the two pivoting points being apart from the floor surface by a considerable distance. As a result, the jogging machine in operation is apt to sway, thereby making its user uneasy and jittery. In addition, the trotting platform is manually slanted to accommodate its user to emulate an uphill jogging. The manual adjustment of the trotting platform is conceivably inconvenient to its user who is in the midst of doing the jogging exercise.
The U.S. Pat. No. 6,050,923 discloses a foldable jogging machine, which is free from the shortcomings of the conventional electric jogging machine described above and is formed of a trotting platform and a triangular support mechanism for supporting the trotting platform. This prior art jogging machine is defective in design in that its trotting platform is considerably heavy and is therefore susceptible to vacillation.
SUMMARY OF THE INVENTION
It is the primary objective of the present invention to provide a foldable jogging machine which has a relatively low center of gravity and is therefore stable while in operation.
It is another objective of the present invention to provide a foldable jogging machine which has a trotting platform capable of being slanted at any time to accommodate its user to emulate an uphill jogging.
It is still another objective of the present invention to provide a foldable jogging machine with a support device for stabilizing effectively the foldable jogging machine.
It is still another objective of the present invention to provide a foldable jogging machine with a trotting platform which can be erected with ease and speed.
In keeping with the principle of the present invention, the foregoing objectives of the present invention are attained by the foldable jogging machine comprising a base, a trotting platform, a support device, and a linear actuator. The base is rested on the floor surface and is formed of a left side having a left slotted rail, and a right side opposite to the left side and having a right slotted rail. The trotting platform is supported by the support device on the base such that the trotting platform can be folded and unfolded. The support device comprises a left support rod and a right support rod. The support device is mounted on the base such that one end of the left support rod is capable of sliding along the left slotted rail of the base, and that one end of the right support rod is capable of sliding along the right slotted rail of the base. The linear actuator is fastened with a carrying plate of the trotting platform such that the free end of an expandable rod of the linear actuator is pivoted with the support device, thereby enabling the front side of the trotting platform to be raised so as to set the trotting platform in an inclined position to accommodate the user of the jogging machine to engage in an uphill jogging.
REFERENCES:
patent: 6033347 (2000-03-01), Dalebout et al.
patent: 6050923 (2000-04-01), Yu
Browdy and Neimark
Richman Glenn E.
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