Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Telescopic
Patent
1984-05-18
1986-04-15
Hafer, Robert A.
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Telescopic
403330, A61H 302, F16B 2100
Patent
active
045820791
ABSTRACT:
A telescoping rod mechanism having a latch mechanism the tension of which is continuously adjustable over a preset range and which, in one embodiment, is adjustable while the device is in use.
REFERENCES:
patent: 1703741 (1929-02-01), Lingg
patent: 2383786 (1945-08-01), Gish
patent: 2960095 (1960-11-01), Smith, Jr.
patent: 4355917 (1982-10-01), Bunger
Hafer Robert A.
Kramer Arnold W.
Schappert Leonard D.
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