Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing
Patent
1979-06-07
1981-05-05
Bell, J. Karl
Tent, canopy, umbrella, or cane
Umbrella
Self-opening and closing
52 80, A45F 116
Patent
active
042652596
ABSTRACT:
A tent is provided wherein the poles are a series of stressed, arcuate rods which surround a convex polyhedra such as a hemispherical structure. The arcuate rods are approximately in the configuration of segments of circles and they cross at a plurality of points and fit in sockets at each point of crossing and the crossing point is fastened to the membrane forming the tent.
REFERENCES:
patent: 2976876 (1961-03-01), Lonnqvist
patent: 3233617 (1966-02-01), Stern
patent: 3269398 (1966-08-01), Holbitz
patent: 3480023 (1969-11-01), McConnell et al.
patent: 3625235 (1971-12-01), Gorgichuk
patent: 4068404 (1978-01-01), Sheldon
patent: 4077417 (1978-03-01), Beavers
patent: 4099533 (1978-07-01), Gillis
Bell J. Karl
Slick Robert G.
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