Composite frame wheelchair
November 15, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2515261 Transportation of disabled or invalided persons Polyvinyl chloride containing a filler Wheelchair frame construction Wheelchair Mobile chair with removable rear wheel assembly Collapsible wheelchair and wheelchair structure Adjustable rear wheel mounting assembly for wheelchairs Method of molding composite bicycle frames Integral rear wheel suspension for composite material bicycle frame InventorsAssigneeApplicationNo. 614164 filed on 11/15/1990US Classes:280/250.1, Wheelchair type280/281.1, Frames and running gear280/304.1, Wheelchair297/365, Engages movable rack297/378.12Held erect by a releasable latchExaminersPrimary: Marmor, Charles A.Assistant: Boehler, A. M. Attorney, Agent or FirmForeign Patent References
International ClassB62M 001/14AbstractAn 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. | |
