Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing
Patent
1997-06-05
1998-06-02
Mai, Lanna
Tent, canopy, umbrella, or cane
Umbrella
Self-opening and closing
135 203, 135 22, A45B 2514
Patent
active
057586772
ABSTRACT:
The present invention relates to an improved umbrella including a spring received in a shaft of the umbrella and a controlling piece mounted on the shaft for engaging with a runner in closing state. By use of a slidable piece provided within the shaft and a connecting wire, it is capable of being automatic opened. Because of the spring is received in the shaft and prevented from being rusted or damaged, the invented structure of the umbrella is useful and has improvements.
REFERENCES:
patent: 4807655 (1989-02-01), Robertson
patent: 4941494 (1990-07-01), Wu
patent: 4989625 (1991-02-01), Wu
patent: 5174319 (1992-12-01), Chou et al.
patent: 5178174 (1993-01-01), Wu
patent: 5390686 (1995-02-01), Lin et al.
patent: 5505222 (1996-04-01), Lin et al.
patent: 5617889 (1997-04-01), Wu
patent: 5626160 (1997-05-01), Ko
patent: 5645094 (1997-07-01), Wu
Klein David I.
Lee Jun Y.
Mai Lanna
Rosenberg Morton J.
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