Window blind activator

Details Window blind activator Window blind activator

1991-11-01

1993-02-09

Purol, David M.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

160 841, E06B 930

Patent

active

051846608

ABSTRACT:
A device for raising and lowering window blind fabrics. The device has a hollow take-up tube disposed around and threadably engaged to a stationary guide. A cord is connected at its one end to the take-up tube and at its other end to the blind fabric. The take-up tube is rotated to wind or unwind the cord. A drive core rotatably disposed within a bi-directional friction brake, the drive core connected to the take-up tube, the bi-directional friction brake being fixed to the headrail. When the cord is wound around the take-up tube, the blind fabric is raised. When the cord is unwound, the blind fabric is lowered.

REFERENCES:
patent: 2738005 (1956-03-01), Nisenson
patent: 3141497 (1964-07-01), Griesser
patent: 3439726 (1969-04-01), Lageson
patent: 4793396 (1988-12-01), Anderson et al.
patent: 4919186 (1990-04-01), Uecker et al.
patent: 5070927 (1991-12-01), Chen

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