Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing
Reexamination Certificate
1999-03-31
2001-01-23
Canfield, Robert (Department: 3635)
Tent, canopy, umbrella, or cane
Umbrella
Self-opening and closing
C135S022000, C135S023000, C135S025100
Reexamination Certificate
active
06176246
ABSTRACT:
BACKGROUND OF THE INVENTION
U.S. Pat. No. 5,626,161 issued to the same inventors of this application disclosed an automatic umbrella having triple folds for folding the umbrella ribs and the tubes of the central shaft. While the U.S. patent application of Ser. No. 09/071,439 filed on May 1, 1998 by the same inventors of this application disclosed an automatic umbrella with quadruple folds. Both the two prior arts as above-mentioned disclosed an anti-false operation safety means
57
having an elongated cylinder (
571
) which is operatively lowered by the tubes of the central shaft (
1
) after closing the umbrella to lower the latch (
54
) integrally formed on the cylinder (
571
) to prevent a false depression of the push button (
51
) against the latch (
54
) of the closing controller (
53
) when opening the umbrella.
Since the elongate cylinder (
571
) of the anti-false operation safety means (
57
) should be provided in a lower portion of the grip (
12
) and the lower tube (
11
) of the central shaft (
1
), it will require an appreciable length of the grip and the shaft, thereby influencing a total length of the umbrella when folded and limiting the miniaturization of the multiple-fold automatic umbrella.
The present inventor has found the drawbacks of the conventional automatic umbrella and invented the present automatic umbrella with simplified structure and also with shortened length.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a multiple-fold automatic umbrella including: a central shaft consisting of plural tubes telescopically engageable with one another; a rib assembly including at least a top rib pivotally secured to an upper notch of the central shaft, a stretcher rib pivotally secured between the top rib and a lower runner slidably held on the central shaft, and other ribs pivotally connected with one another and pivotally secured to the top rib and the stretcher rib; an opening spring resiliently retained in the central shaft for opening the umbrella; a plurality of closing springs for closing the umbrella; and a control device including a drawer shaped push button slidably held in a grip of the central shaft having an upper latch integrally formed on the push button operatively disengaging the lower runner for opening the umbrella, and a lower latch for closing the umbrella when opened and perpendicularly secured thereunder with a safety spring member resiliently held in a front chamber formed in a front portion of the grip, not in a bottom portion of the grip, in order for shortening the length of the grip for miniaturizing the multiple-fold automatic umbrella.
REFERENCES:
patent: 5868151 (1999-02-01), Kuo
patent: 5992433 (1999-02-01), Chung-Kuang et al.
patent: 6016822 (2000-01-01), Lin et al.
Chang Jung-Jen
Lin Chung-Kuang
Canfield Robert
Dougherty & Troxell
Fu Tai Umbrella Works Ltd.
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