Land vehicles – Wheeled – Occupant propelled type
Patent
1988-05-31
1989-09-05
Mitchell, David M.
Land vehicles
Wheeled
Occupant propelled type
280 42, 280650, 297 42, 403349, B62M 114
Patent
active
048631817
ABSTRACT:
A foldable wheelchair is provided which includes first and second side frames which each rotatably carry a drive wheel and traveling wheel. A foldable seat extends between the side frames to form a flat, rigid surface when the wheelchair is open and to collapsably pivot upwardly when the wheelchair is folded. First and second hinges are positioned beneath and behind the foldable seat, respectively, and each extends between the side frames so as to pivot about an upwardly extending axis and to move rearwardly as the wheelchair is folded. Both hinges comprise a first arm pivotably secured at one end to a respective one of the side frames and extending generally inwardly and rearwardly of the foldable seat and a second arm pivotably secured at one end to the other of the side frames and at the second end pivotably connected to the other end of the first arm so as to form a hinge therewith.
REFERENCES:
patent: 330231 (1885-11-01), Hall et al.
patent: 2632654 (1953-03-01), Cornish
patent: 3142351 (1964-07-01), Green
patent: 4343482 (1982-08-01), Wegner
patent: 4493488 (1985-01-01), Panaia et al.
patent: 4679816 (1987-07-01), Riikonen
patent: 4679849 (1987-07-01), Torgny
patent: 4682783 (1987-07-01), Kuschall
patent: 4682784 (1987-07-01), Anderson
patent: 4712830 (1987-12-01), Charbrol et al.
Publication by Homecare, Jul. 1986, pp. 38, 55-56, 59 and 82.
Publication by Canyon Products, Sep. 1986, p. 7.
Publication by Home Health Care Products, Mar. 31, 1988, p. 20.
Publication by Homecare, Apr. 1988, pp. 111-112, and 128.
Culbreth Eric
Jenkins Richard E.
Mitchell David M.
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