Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing
Patent
1984-02-07
1985-08-13
Johnson, Richard J.
Tent, canopy, umbrella, or cane
Umbrella
Self-opening and closing
135 24, A45B 2516
Patent
active
045343748
ABSTRACT:
An umbrella automatically openable and closable by a single push-button operation. The umbrella comprises an outer tubular shaft having a lower ring fixed on the upper end thereof; an intermediate tubular shaft slidably inserted in the outer tubular shaft and having an intermediate ring on the upper end thereof; an upper inner shaft slidably inserted in the upper end of the intermediate tubular shaft and having an upper ring fixed on the upper end thereof; a lower inner shaft slidably inserted in the lower end of the intermediate tubular shaft and having on the lower end thereof a grip, operably mounted thereinside a first spring pawl attached with a push button on the lower end thereof and a second spring pawl; a first spring means fitted over the intermediate tubular shaft in between the intermediate ring and the lower ring; and a second spring means mounted inside the intermediate tubular shaft in between the upper inner shaft and the lower inner shaft.
REFERENCES:
patent: 3003508 (1961-10-01), Bremshey
patent: 3658077 (1972-04-01), Sato
patent: 3672382 (1972-06-01), Sato
patent: 3756258 (1973-09-01), Yoshihara
patent: 3856030 (1974-12-01), Sato
patent: 4421133 (1983-12-01), Huang
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