Pulling cord winding apparatus for window shades

Details Pulling cord winding apparatus for window shades Pulling cord winding apparatus for window shades

2008-01-22

2008-01-22

Johnson, Blair M. (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

Reexamination Certificate

active

11049739

ABSTRACT:
A pulling cord winding apparatus for window shades is installed on a bottom rail of a window shade includes a upper cap and a lower seat, two elastic take-up reels, two elastic coils held in the elastic take-up reels having two ends latched thereon, an elastic reed bridged a post located on one side of the center housing compartment and each of two brake elements; and a push rod located between two brake elements to form a forced contact. The push rod is depressible forwards and retractable rearwards to retract and press the brake elements to allow a coarse surface formed on an outer side of the brake elements to be spaced from or compressed on the two elastic take-up reels to form a braking or rotating condition and allow the two elastic coils to be retracted or extended to extend or retract the window shade to a selected location.

REFERENCES:
patent: 794937 (1905-07-01), Hopkins
patent: 6024154 (2000-02-01), Wang et al.
patent: 6575223 (2003-06-01), Chung et al.
patent: 6823925 (2004-11-01), Militello et al.
patent: 2005/0205219 (2005-09-01), Hsu

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