Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing
Patent
1997-08-26
1998-08-11
Mai, Lanna
Tent, canopy, umbrella, or cane
Umbrella
Self-opening and closing
135 22, 135 28, A45B 2514
Patent
active
057913595
ABSTRACT:
An automatic umbrella includes: a central shaft (1) having a lower tube (11), a middle tube (13) and an upper tube (14) telescopically engageable with one another, an umbrella rib assembly (2) pivotally secured to the central shaft (1) and having an umbrella cloth (C) secured on the rib assembly (2), an opening spring (3) retained in the central shaft (1) for automatically opening the umbrella, a drag means (4) provided in the central shaft (1) through a lower runner (24) of the rib assembly (2) for pulling the lower runner (24) upwardly for extending the rib assembly (2) when opening the umbrella, and a control means (5) for controlling the automatic opening of the umbrella, wherein the tubes of the central shaft (1) are each made of light weight materials for lightening the weight of the umbrella and each tube having a cross section of concave hexagonal sides for reinforcing the strength of the tubes of the central shaft for a reliable umbrella opening operation.
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patent: 5720311 (1998-02-01), Lin et al.
Chang Jung-Jen
Lin Chung-Kuang
Fu Tai Umbrella Works Ltd.
Mai Lanna
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