Lightening multiple-fold automatic umbrella

Details Lightening multiple-fold automatic umbrella Lightening multiple-fold automatic umbrella

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.

REFERENCES:
patent: 4823821 (1989-04-01), Day
patent: 4825888 (1989-05-01), Su
patent: 5232004 (1993-08-01), Wu
patent: 5309932 (1994-05-01), Chou et al.
patent: 5390686 (1995-02-01), Lin et al.
patent: 5441065 (1995-08-01), Lin et al.
patent: 5492140 (1996-02-01), Lin et al.
patent: 5626161 (1997-05-01), Lin et al.
patent: 5645094 (1997-07-01), Wu
patent: 5720311 (1998-02-01), Lin et al.

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