Exercise devices – Involving user translation or physical simulation thereof – Stair climbing
Patent
1993-07-09
1994-03-29
Crow, Stephen R.
Exercise devices
Involving user translation or physical simulation thereof
Stair climbing
482 79, A63B 2204
Patent
active
052980022
ABSTRACT:
A stepper includes a base frame, a parallel-crank linkage, and a resistance device. The base frame has a pivot portion located at an intermediate section thereof. The parallel-crank linkage includes a pedal assembly, a reciprocating lever and two parallel cranks. The pedal assembly has two horizontal pedals, each of which having an inverted U-shaped bracket secured to a bottom surface thereof. The reciprocating lever has a middle section mounted pivotally on an upper section of the pivot portion of the base frame and two end sections mounted pivotally and respectively on the inverted U-shaped brackets of the pedal assembly. The cranks are disposed under the reciprocating lever. One of the cranks is pivotally connected to the pivot portion of the base frame at one end thereof and to one of the inverted U-shaped brackets of the pedal assembly at the other end. The other one of the cranks is pivotally connected to the pivot portion of the base frame at one end thereof and to the other one of the inverted U-shaped brackets of the pedal assembly at the other end. The resistance device is interposed between the reciprocating lever and the base frame and is adapted to provide a resistance to pivotal movement of the reciprocating lever.
REFERENCES:
patent: 3747924 (1973-07-01), Champoux
patent: 5199934 (1993-04-01), Lin
patent: 5230675 (1993-07-01), Lin
patent: 5232421 (1993-08-01), Chen et al.
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