Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Crutches
Patent
1987-06-02
1989-07-11
Hafer, Robert A.
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Crutches
A61H 302
Patent
active
048462039
ABSTRACT:
A stowable crutch is disclosed which includes two parallel integrated tubes in a single body with a first tube to which a crutch tip is mounted and a second tube to which a rest support is attached, each slidably mounted within an integrated tube. The interior of the integrated tubes are fluted or polygonal in cross section to engage a ratchet or detent mounted on the end of the first and second tubes to effectuate a selection means. The first and second tubes are engaged by an external detent mounted at either end of the body. The first and second tubes are rotated individually to a desired selection and extended to that length whereupon they engage with the external detent. The handgrip is slidably mounted to the body to provide a wide range of adjustment. The external detents provide a means to signal when the first and second tubes are not securely engaged.
REFERENCES:
patent: 869128 (1907-10-01), Autenrieth
patent: 1197375 (1916-09-01), Hoff
patent: 2528706 (1950-11-01), Osborn
patent: 2817348 (1957-12-01), Holliday, Jr.
patent: 3208461 (1965-09-01), Irwin
patent: 3254659 (1966-06-01), Williams
patent: 3947140 (1976-03-01), Thomas
Hafer Robert A.
Luconex, Inc.
Sam Charles H.
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