Undertaking
Patent
1990-02-15
1991-10-15
Bahr, Robert
Undertaking
272134, A63B 2106
Patent
active
050567772
ABSTRACT:
An exercise machine is disclosed, in which there is a frame, an exercise portion moveable with respect to the frame, weights raisable with respect to the frame, and a cable connecting the weights to the exercise portion. The force transmission mechanism between the weights and the exercise portion involves first and second pivot points mounted to the frame and spaced apart from each other in a plane substantially parallel to and spaced from the plane of movement of the exercise portion, and a third pivot point mounted to the exercise portion and moveable therewith. The cable is connected at one end to the frame, passing around one of the first and second pivot points, then to and passing around the third pivot point, then to and passing around the other of the first and second pivot points, thus defining a triangle with the third pivot point constituting a moveable apex, and then connecting at its other end to the weights. This arrangement produces a resistance which varies with the displacement of the exercise portion of the machine.
REFERENCES:
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patent: 4199139 (1980-04-01), Mahnke et al.
patent: 4333644 (1982-06-01), Lambert, Jr. et al.
patent: 4402504 (1983-09-01), Christian
patent: 4549733 (1985-10-01), Salyer
patent: 4616825 (1986-10-01), Anderson
patent: 4842270 (1989-06-01), Lange
Capjon Jan
Nygaardsvik Atle
Bahr Robert
Potential Training Products Co. Inc.
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