Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Tips
Patent
1982-06-18
1984-03-06
Hafer, Robert A.
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Tips
135 70, A45B 904, A61H 302
Patent
active
044348088
ABSTRACT:
An anti-skid device according to the teachings of the present invention is shown utilized with a cane, crutch, or the like and includes a gripping member having a plurality, preferably three, non-skid pins which are vertically adjustable therein. The gripping member is preferably vertically movable by and rotatable about a vertical pin which is parallel to and spaced from the crutch. For moving the gripping member from a biased, raised, non-engaged position to a lowered, engaged position, a pivot member is provided pivotally mounted to the crutch at a point intermediate its first and second ends. The first end of the pivot member engages with and pushes the vertical pin upon which the gripping member is mounted. An actuating handle located adjacent the handhold of the crutch is pivotally interrelated to the second end of the pivot member by a cable attached therebetween. A lever arm pivotally mounted to the crutch is attached to the cable intermediate the handle and the pivot member for increasing the cable travel distance by leverage principles.
REFERENCES:
patent: 970497 (1910-09-01), Harding
patent: 1284991 (1918-11-01), Beecroft
patent: 1304978 (1919-05-01), Herrold
patent: 1518382 (1924-12-01), Beecroft
patent: 2371246 (1945-03-01), McGrory et al.
patent: 3512541 (1970-05-01), Goggins
patent: 3646949 (1972-03-01), Streeter
patent: 3881504 (1975-05-01), Pfaff
Hafer Robert A.
Kramer Arnold W.
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