Undertaking
Patent
1991-01-23
1991-11-05
Crow, Stephen R.
Undertaking
A63B 2304
Patent
active
050626272
ABSTRACT:
A reciprocator for use with a stepper-type exercise machine has a channel as a rocker element. The channel has left and right ends which rotate about a pivot axis below the pedals. Rollers are mounted at each end of the channel. The rollers have a groove to engage with arcuate roller engagement structures attached to the underside of each pedal. The rollers are each mounted on a mount bar which spans the opening of the channel at the left and right ends. A pair of springs are positioned at each end to urge the roller away from the sides of the channel.
REFERENCES:
patent: 4600187 (1986-07-01), Scherker
patent: 4830362 (1989-05-01), Bull
patent: 4838543 (1989-06-01), Armstrong et al.
Crow Stephen R.
Proform Fitness Products, Inc.
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