IAN CAMPBELL CREE
Medical Practice in Rancho Santa Fe, CA
License number
Pennsylvania MD034652L
Category
Medicine
Type
Medical Physician and Surgeon
Address
Address
2
Rancho Santa Fe, CA 92067
Pennsylvania
Pennsylvania
Professional information
Foldable Ramp
US Patent:
4726516, Feb 23, 1988
Filed:
Apr 6, 1987
Appl. No.:
7/034536
Inventors:
Ian C. Cree - Rancho Santa Fe CA
International Classification:
E01B 2300
US Classification:
238 10R
Abstract:
A pair of coplanar, telescopic tracks are held in a spaced-apart and generally parallel relationship by a plurality of crossties. The crossties may also be telescopic to vary the space between the tracks according to use. At one end the tracks can be elevated by length-adjustable props or variable trusses. Each track comprises at least two segments, a first segment adapted to be slidably disposed in a channel of the second segment. The segments can be channel bars. A detent is used to temporarily hold the tracks at any of a plurality of telescoped lengths. A variable truss comprises a pair of divergent struts with a variable length member subtending the angle between the struts. This device is especially useful as a variable ramp for wheelchairs when it is made from relatively lightweight material such as aluminum.