Garden or sun umbrellas

Details Garden or sun umbrellas Garden or sun umbrellas

1987-11-03

1989-02-28

Scherbel, David A.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

135 20M, A45B 2514

Patent

active

048076554

ABSTRACT:
According to the invention a garden or sun umbrella is provided with spring means for automatically opening the umbrella. In a preferred embodiment the spring is a gas spring mounted inside the central post of the umbrella and is operatively connected to a collar slidably mounted on the post and which in turn is connected via struts to the arm of the umbrella, by means of a flexible cord connected at its opposite ends to the collar and reeved around pulley blocks at opposite ends of the gas spring. After manually initiating the opening of the umbrella by pivoting the arms, in the collapsed position, away from the post, the opening action is completed automatically by the action of the spring. Closing of the umbrella is effected by downward pressure on the arms of the umbrella against the action of the spring.

REFERENCES:
patent: 1070894 (1913-08-01), Hopkins
patent: 2721569 (1955-10-01), Militano
patent: 3150671 (1964-09-01), Frey
patent: 3732881 (1973-05-01), Hirai
patent: 4011881 (1977-03-01), Becher
patent: 4192543 (1980-03-01), Crawford
patent: 4252137 (1981-02-01), Cohen
patent: 4319600 (1982-03-01), Roche
patent: 4424824 (1984-01-01), Becher
patent: 4543971 (1985-10-01), Sirota
patent: 4747422 (1988-05-01), Chung

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