Land vehicles – Wheeled – Extensible
Patent
1982-10-19
1985-09-24
Mitchell, David M.
Land vehicles
Wheeled
Extensible
280 4322, 280242WC, 280289WC, B62M 114
Patent
active
045429189
ABSTRACT:
A foldable wheelchair is provided of small and compact folded size for use particularly in travelling where only limited access for wheelchairs is available, e.g. on airplanes or trains. The wheelchair has two side frames (1) connected by a foldable linkage (2) operable on lifting members (6) to which the seat panel (5) is fitted with slide rods (44) being guided through cross members (11) of the side frames. The wheelchair includes front castor wheels (8) and removable rear wheels with hand rims (15) for self-propelling, and to remove the wheels (14) there is a control mechanism operable by a handle (26) to lower rear castor wheels (13) to jack the larger wheels (14) off the ground ready for detachment by lifting a pull ring (23). The control mechanism includes a brake applied to the rear castor wheels on jacking, and the rear castor wheels are biased by springs (34) into the raised position. The wheelchair can be pushed by an attendant when the wheels (14) are removed and the overall width of the wheelchair significantly reduced. The control mechanism can be operated by the wheelchair occupant.
REFERENCES:
patent: 1322788 (1919-11-01), Hazelton
patent: 4042250 (1977-08-01), Rodaway
patent: 4098521 (1978-07-01), Ferguson et al.
patent: 4358125 (1982-11-01), Charles
patent: 4392690 (1983-07-01), Anderson
Mitchell David M.
The Spastics Scoiety
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