Operating device for a venetian blind to control raising and low

Details Operating device for a venetian blind to control raising and low Operating device for a venetian blind to control raising and low

1997-11-18

1999-05-18

Stodola, Daniel P.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

1601761R, 1601782R, E06B9/30

Patent

active

059041986

ABSTRACT:
A mechanism for combining, into a single structure, the functions of raising, lowering and tilting the slats of a Venetian blind. The mechanism is attached to a slat actuating shaft and comprises a hollow positioning tube coupled to the shaft so that axial rotation of tube rotates the shaft and tilts the slats to a desired angle. Slat pull ropes extend into the hollow portion of the tube. The hollow portion of the tube also contains a releasable clamping unit and a stationary roller which is rotatably coupled to the tube. The releasable clamping unit comprises a movable roller and a biasing spring which forces the movable roller toward the stationary roller so that the pull ropes are clamped between the rollers when the slats are raised or lowered to a desired position. An elongated sleeve is mounted on and slidable with respect to the tube. The sleeve is coupled to the releasable clamping unit so that when the sleeve is moved downward along the tube, the movable roller moves away from the stationary roller to release the pull ropes.

REFERENCES:
patent: 3952789 (1976-04-01), Marotto
patent: 4352386 (1982-10-01), Butler et al.
patent: 5465775 (1995-11-01), Biba et al.
patent: 5472035 (1995-12-01), Biba et al.
patent: 5472036 (1995-12-01), Judkins
patent: 5553649 (1996-09-01), Chisaka et al.
patent: 5553653 (1996-09-01), Rozon
patent: 5671793 (1997-09-01), Lee
patent: 5709258 (1998-01-01), Coccoluto
patent: 5749405 (1998-05-01), Huang

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