Method and apparatus for variable proportional weight lifting ex

Details Method and apparatus for variable proportional weight lifting ex Method and apparatus for variable proportional weight lifting ex

1989-05-18

1990-09-04

Bahr, Robert W.

Undertaking

272134, A63B 21062

Patent

active

049538551

ABSTRACT:
A split phase cam-controlled weight lifting exercise machine employs two independently selectable weight stacks connected by cable and pulley assemblies to a respective phase of the cam. Exercise arms are pivotally mounted for pivotal movement of the cams to which are connected the cables in a manner to provide for a different moment arm for one loaded weight than for the other during a part of the exercise. The weight loading is selected by a pin that fits through the weights and a guide rod mounted so as to not contact the weights and cause friction that degrades the benefits of the split cam operation. The guide rod is mounted on bearings that limit movement to the vertical direction. The weights include integral interlocks to align them vertically in a stack.

REFERENCES:
patent: 3912261 (1975-10-01), Lambert, Sr.
patent: 4538805 (1985-09-01), Parviainen
patent: 4546971 (1985-10-01), Raasoch
patent: 4809973 (1989-03-01), Johns
patent: 4834365 (1989-05-01), Jones

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