Wheel chairs

Details Wheel chairs Wheel chairs

1982-03-22

1984-06-19

Peters, Jr., Joseph F.

Land vehicles

Step or abutment ascending type vehicle

Relatively movable running gear portions

180 82, 280 53, 280242WC, 280DIG10, B62B 502

Patent

active

044550294

ABSTRACT:
A wheel chair has means for surmounting obstacles, comprising extensible legs 8 with wheels 10 at their feet ends, a link cable or the like mechanical connection actuable by a handle, 18 for lifting the wheelchair, the legs being extensible by pushing the handle forward to force the wheels 10 downwardly and lift the castors 5, and auxiliary rear wheels 31 being lowered for lifting the main wheels 6. Each lever 17 is mechanically connected to bell crank 28 pivoted on the rear of a base frame member. The bell crank carries, with a similar crank on the other side, the auxiliary rear wheels 31 which can be raised and lowered in response to lever 17. The wheels 31 are driven via a belt drive 33 running about the periphery of the wheels 31 and driven from the main wheels of the wheel chair by a pulley 34. A sprocket and chain drive can be used instead.

REFERENCES:
patent: Re28256 (1974-11-01), Zamotin
patent: 3869146 (1975-03-01), Bulmer
patent: 3905437 (1975-09-01), Kaiho et al.

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