Raising and lowering mechanism for blinds

Details Raising and lowering mechanism for blinds Raising and lowering mechanism for blinds

2003-12-15

2008-12-16

Johnson, Blair M. (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

C242S613100

Reexamination Certificate

active

07464742

ABSTRACT:
A cord spool for winding a lift cord for lifting or lowering a window covering wherein the cord spool includes an elongated general cylindrical body with a large diameter end and a small diameter end and a circumferential outer surface of a given length extending therebetween. The circumferential outer surface having a plurality of generally parallely extending longitudinal ribs. The cord spool can be provided as part of a lifting and lowering mechanism for a blind further including a rotatable drive shaft and at least one lift cord. A support is provided for rotatably supporting the cord spool and the support may be attached to a head rail by means of a separate cord guiding grommet in the head rail. It may also include means for supporting a drive mechanism. The cord spool can be constructed from two halves and may also include an end plug, which can be snap-indexed between relative angular positions to adjust the cord length.

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