Stairclimber with a safety speed changing device

Details Stairclimber with a safety speed changing device Stairclimber with a safety speed changing device

1990-06-12

1991-02-05

Crow, Stephen R.

Undertaking

272 69, 272DIG4, A63B 100, A63B 2202

Patent

active

049898574

ABSTRACT:
This invention relates to a stairclimber with a safety speed changing device and in particular to one including a base, a handle frame vertically mounted on the base, a support vertically mounted between a gauge board and the base, a front bracket fixed on the base and spaced apart from the support, a rear bracket mounted on the base and disposed rearwardly of the front bracket, a transmission mechanism fixedly mounted on upper side of the front bracket and provided with a pulley connected to a rotating disc of a motor via a belt and a link pivotally connected with an oscillating rod having a pair of pedals, and a speed changing mechanism having a rotating handle disposed on upper half of the support to control an upper gear which in turn drives a lower gear via a chain.

REFERENCES:
patent: 2969768 (1969-01-01), Grant
patent: 4687195 (1987-08-01), Potts
patent: 4708338 (1987-11-01), Potts
patent: 4726581 (1988-02-01), Chang

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