Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Combined and convertible
Patent
1995-03-07
1996-01-09
Mai, Lanna
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Combined and convertible
135 78, A45B 300
Patent
active
054820715
ABSTRACT:
A crutch includes a tube having a handle fixed on top. The handle includes a knife engaged in the tube. An extension is slidably engaged in the tube and includes an upper end adjustable relative to the tube and secured to the tube by a projection. A tool head includes a stud for engaging with the extension. The tool head may be a tip member, an axhammer or a shovel. A coupler is secured to the extension, and a quick coupler may further be engaged with the tool head so as to secure the tool head to the coupler.
REFERENCES:
patent: 422753 (1890-03-01), Evans, Jr.
patent: 521342 (1894-06-01), Gaskill
patent: 636074 (1899-10-01), Skoog
patent: 1509157 (1924-09-01), Leano
patent: 3710807 (1973-01-01), Ferry
patent: 5139040 (1992-08-01), Kelly
Klein David I.
Mai Lanna
Rosenberg Morton J.
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