Winch-actuated umbrella

Details Winch-actuated umbrella Winch-actuated umbrella

2007-03-29

2008-08-05

Yip, Winnie (Department: 3636)

Tent, canopy, umbrella, or cane

Umbrella

Mechanically operated

C135S016000, C135S098000, C135S020100, C248S514000

Reexamination Certificate

active

07406976

ABSTRACT:
A winch for opening and closing an umbrella includes a winch drum mounted within an elongate support tube of the umbrella, to rotate about a longitudinal axis thereof. A threaded shaft is coaxial and rotationally fast with the drum. A line is fixed at one end to the drum and at other end to a sleeve, to which struts are pivotally connected, each strut being associated with a canopy-supporting rib. A travelling nut is engaged with the threaded shaft and blocked for rotation relative to the tube. A guide is fixed to the nut for guiding the line onto the drum, and a motor is also enclosed in the support tube and drivingly connected to the winch drum.

REFERENCES:
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patent: 3311119 (1967-03-01), Pearlstine
patent: 3870062 (1975-03-01), Medlin
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patent: 6364562 (2002-04-01), Tung
patent: 6543464 (2003-04-01), Grady, II
patent: 6575182 (2003-06-01), Tung
patent: 6622741 (2003-09-01), Lai
patent: 6722381 (2004-04-01), Lai
patent: 6761180 (2004-07-01), Lai
patent: 6871659 (2005-03-01), Tung
patent: 6953043 (2005-10-01), Yu
patent: 7188633 (2007-03-01), Zerillo
patent: 2006/0151019 (2006-07-01), Lo
patent: WO 2006032162 (2006-03-01), None
U.S. Appl. No. 11/493,543, filed Jul. 27, 2006, Ping Chiu Chan.

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