Winding device for a window blind

Details Winding device for a window blind Winding device for a window blind

2006-08-29

2006-08-29

Purol, David (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

Reexamination Certificate

active

07096918

ABSTRACT:
A winding device includes a headrail, a winding drum, a pull cord, a carriage member, and a guide member. The winding drum is mounted on the headrail, is operable so as to rotate relative to the headrail, and has threaded and smooth drum portions. The pull cord extends through the headrail and is secured to the smooth drum portion. The carriage member threadedly engages the threaded drum portion, and is movable along the threaded drum portion when the winding drum is rotated so as to wind the pull cord on the smooth drum portion. The guide member is coupled to the carriage member so as to be co-movable therewith, and guides the pull cord such that winding turns of the pull cord on the smooth drum portion are formed adjacent to one another without overlapping.

REFERENCES:
patent: 2250106 (1941-07-01), Lorentzen
patent: 2765030 (1956-10-01), Bechtler
patent: 3141497 (1964-07-01), Griesser
patent: 5103888 (1992-04-01), Nakamura
patent: 5328113 (1994-07-01), de Chevron Villette et al.
patent: 5645118 (1997-07-01), Lagarde
patent: 5908062 (1999-06-01), Fun
patent: 6655441 (2003-12-01), Wen et al.
patent: 6659156 (2003-12-01), Wen et al.
patent: 6662850 (2003-12-01), Chung et al.
patent: 6918424 (2005-07-01), Lin

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