1988-12-09
1990-03-27
Bahr, Robert W.
Undertaking
A63B 2106
Patent
active
049114310
ABSTRACT:
A cam structure for use in athletic exercise and rehabilitation apparatus, in said structure the cam (1) comprising a guiding surface (3) which is eccentric relative to the center of rotation (2) of the cam and on which a force transmission member has been disposed to be carried when the cam is rotated. The cam comprises a second eccentric guiding surface (5), the starting points (4,6) of said guiding surfaces being connected with each other so that the force transmission member can be shifted from the first (3) guiding surface onto the second (5) and back.
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patent: 4621807 (1986-11-01), Stramer
patent: 4709920 (1987-12-01), Schnell
Bahr Robert W.
David International Ltd.
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