Land vehicles – Wheeled – Occupant propelled type
Patent
1990-11-15
1992-10-06
Marmor, Charles A.
Land vehicles
Wheeled
Occupant propelled type
2802811, 2803041, 297365, 297379, B62M 114
Patent
active
051525437
ABSTRACT:
An improved wheelchair is constructed with a base frame formed from composite material tubing. The base frame comprises a pair of unitary side frames of composite material tubing which preferably has an elliptical cross section oriented to provide increased structural strength along a primary loading axis during normal use. The side frames are interconnected by a plurality of cross braces of composite material tubing, wherein the lengths of the cross braces can be selected in accordance with a desired wheelchair frame width. A folding seatback is mounted on the side frames for releasable locking in an upright orientation, with a pair of spring-loaded lock pins being releasable by pulling a pull cord to permit seatback folding to a collapsed condition.
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Lewandowski Raymond P.
McWethy Robert T.
Reynolds Robert W.
Sims Larry A.
Boehler A. M.
Everest & Jennings, Inc
Marmor Charles A.
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