Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Crutches
Patent
1985-06-19
1990-04-17
Hafer, Robert A.
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Crutches
135 75, A61H 302
Patent
active
049171267
ABSTRACT:
A stowable crutch is disclosed which includes a body consisting of a first and a second tube secured to each other. A third tube to which a crutch tip is attached is slidably mounted within the first tube and includes a plunger assembly to secure the third tube in any one of a plurality of fixed positions with respect to the first tube. A fourth tube, to which an underarm assembly is secured, is slidably mounted within the second tube and also includes a plunger assembly to secure the fourth tube in a number of desired positions with respect to the second tube. A hand grip is mounted to the body with a ball-and-socket joint to enable adjustment of its orientation with respect to the body.
REFERENCES:
patent: 1192290 (1916-07-01), Engstrom
patent: 2388778 (1945-11-01), Wheeler
patent: 2408604 (1946-10-01), Brickson
patent: 2528706 (1950-11-01), Osborn
patent: 2590607 (1952-03-01), Grimball
patent: 2711183 (1955-06-01), Lofstrand, Jr.
patent: 3208461 (1965-09-01), Irwin
patent: 3254659 (1966-06-01), Williams
patent: 3304946 (1967-02-01), Lutes
patent: 3947140 (1976-03-01), Thomas
patent: 4151853 (1979-05-01), Inbar
Children's Hospital
Hafer Robert A.
Sam Charles H.
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