Static structures (e.g. – buildings) – Machine or implement
Patent
1998-05-04
2000-05-09
Friedman, Carl D.
Static structures (e.g., buildings)
Machine or implement
527351, 5271705, 5271703, 527404, 527406, E04C 330
Patent
active
060586745
ABSTRACT:
A structural member for use in a wheelchair which includes an elongate section having side members connected by at least one central member and movement accommodating channels. Preferably, the elongate section has a W-shaped cross-sectional configuration. The preferred cross-section has a generally round outline. The preferred wheelchair structural member also includes a mechanism for imparting torsional stiffness thereto. Preferably, that mechanism includes stiffening disks which have a solid, circular cross-sectional appearance, and which are formed integrally with the elongate section. Similarly, the preferred structural member may include a mechanism for imparting bending strength. Stiffening disks, as well as increased cross-sectional diameter and increased wall thickness may be used to reduce the tendency of a structural member to bend. A preferred injection molding method and the preferred use of fiber-reinforced plastic materials are also disclosed.
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Clover, Jr. William M.
Sarpe Vladimir
Friedman Carl D.
Glessner Brian E.
McCarthy Daniel
Niebuhr Frederick W.
Power Brick
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