Variable resistance lifting mechanism

Details Variable resistance lifting mechanism Variable resistance lifting mechanism

1980-01-17

1982-12-28

Pinkham, Richard C.

Undertaking

272DIG4, A63B 2106

Patent

active

RE0311138

ABSTRACT:
A variable resistance lifting mechanism for increasing the resistive force during an exercise stroke includes a lever arm pivotally attached to a frame at one end and slidably mounted through a linear bearing sleeve at a position remote from the pivot point. In one embodiment, the linear bearing sleeve is connected by a clevis pin to a housing slidable in a linear manner on guide bars. A bar secured to the housing is adapted to be attached to a predetermined number of weights. The weights are also slidable in a linear manner on the guide bars. In a second embodiment, the linear bearing sleeve is pivotally connected by the clevis pin directly to the bar adapted to the attached to the predetermined number of weights. Pivoting of the lever arm by the user causes pivoting of the sleeve with the lever arm about the remote pivot point and simultaneous linear movement of the sleeve and the attached weights so that the lifting force is distributed over a length of the lever arm and the bending force is distributed over a length of the guide bars.

REFERENCES:
patent: 3612523 (1971-10-01), Glynn
patent: 3905599 (1975-09-01), Mazman

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