Venetian blind with a cord-winding device

Details Venetian blind with a cord-winding device Venetian blind with a cord-winding device

2007-10-16

2007-10-16

Cuomo, Peter M. (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

C160S17300V

Reexamination Certificate

active

10983714

ABSTRACT:
A venetian blind includes a covering unit, and a cord-winding device. The covering unit includes a plurality of slats and two lifting cords. The cord-winding device includes a casing fixed on the headrail, a plurality of spring-surrounding members disposed rotatably within the casing, a plurality of co-rotatable gears sleeved respectively and fixedly on the spring-surrounding members, and a spiral spring disposed within one of the spring-surrounding members. The spiral spring is disposed within one of the spring-surrounding members, and has two ends fastened respectively to the casing and the one of the spring-surrounding members. Each of the lifting cords has two ends connected respectively to the bottom rail and a corresponding one of the spring-surrounding members. The spiral spring imparts a spring force to substantially balance the total weight of the bottom rail and the covering unit so as to maintain the bottom rail at any position.

REFERENCES:
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patent: 7104492 (2006-09-01), Massell et al.
patent: 2002/0011315 (2002-01-01), Ciuca et al.
patent: 2004/0154758 (2004-08-01), Cheng et al.
patent: 2004/0188038 (2004-09-01), Nien

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