Lifting mechanism for window shades

Details Lifting mechanism for window shades Lifting mechanism for window shades

2007-05-22

2007-05-22

Johnson, Blair M. (Department: 3634)

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

C160S084040

Reexamination Certificate

active

11048707

ABSTRACT:
Provided is a lifting mechanism for a shade including a plurality of continuous slats and two lift cords. The mechanism comprises a winding assembly, and a hoisting assembly fixedly attached to an inner surface of a lowest slat, the hoisting assembly comprising an elongated, hollow member of rectangular section including a bottom rectangular opening and two holes on its upper surface proximate both ends of the opening, and a channel fitted in the hollow member, the channel including a plurality of rollers across two raised walls thereof. The winding assembly is fixedly attached to an outer surface of the lowest slat. Either lift cord has one end terminated at a left (or right) portion of a topmost slat and the other end terminated at the winding assembly by passing left (or right) portions of the slats.

REFERENCES:
patent: 4932711 (1990-06-01), Goebel
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: 2002/0157796 (2002-10-01), Judkins
patent: 2003/0111191 (2003-06-01), Ciuca et al.

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