Quadracycle

Details Quadracycle Quadracycle

2008-03-18

2008-03-18

Winner, Tony (Department: 3611)

Land vehicles

Wheeled

Occupant propelled type

C280S247000, C280S248000, C280S296000, C280S250100, C280S251000, C280S242100

Reexamination Certificate

active

07344146

ABSTRACT:
The improved wheelchair employs the use of two push levers attached to two forward drive gears, and two reverse drive gears, which propel the two main rear wheels of the chair through bicycle chains connecting the front drive gears to sprocket clusters mounted on the rear wheel axles. Direction control mechanisms allow the user to engage either forward or reverse drive gears, or disengage both, thereby producing forward, neutral, and reverse motion. Derailers are mounted behind each rear axle and are activated by shifter mechanisms mounted on the push levers. Disc brakes are mounted on the frame beside each wheel and activated by hand brake levers mounted on the push levers.

REFERENCES:
patent: 1058123 (1913-04-01), Whitaker
patent: 4705284 (1987-11-01), Stout
patent: 6234504 (2001-05-01), Taylor
patent: 6715780 (2004-04-01), Schaeffer et al.
patent: 7195264 (2007-03-01), Drymalski
patent: 2002/0101054 (2002-08-01), James
patent: 2002/0153691 (2002-10-01), Liao et al.
patent: 2003/0071435 (2003-04-01), Schaeffer et al.

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