Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Patent
1993-08-16
1995-05-09
Purol, David M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
E06B 938
Patent
active
054131626
ABSTRACT:
A control unit for use on a vertical blind assembly of the type designed to movably support individual vertically oriented vanes from a horizontally oriented track structure; the control unit being structured and disposed to controllably rotate a pinion rod extending along a length of the track structure for driving engagement with, and synchronized angular adjustment of the vanes. The control unit includes a control housing and is adapted to rotatably support the pinion rod within the track structure. The drive gear assembly within the control housing is drivingly connected to one end of the pinion rod and includes a sprocket gear movably driven by a pull chain selectively in either of two opposite directions. The drive gear assembly is structured to achieve a reduction in rotation between the sprocket gear and pinion rod, thereby providing for increased controlled adjustment of the angular orientation of the vanes. The drive gear assembly is further structured to prevent forced rotation of the pinion rod in response to a rotational force applied to the pinion rod externally of the drive gear assembly, thereby preventing inadvertent displacement of the vanes from an adjusted angular orientation.
REFERENCES:
patent: 3789905 (1974-02-01), Saito
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patent: 4834163 (1989-05-01), Dickstein
patent: 4836345 (1989-06-01), Anderson
patent: 4848435 (1989-07-01), Helver
patent: 4936370 (1990-06-01), Uecker et al.
patent: 5054535 (1991-10-01), Rozon
Downey Robert M.
Micro Molds Corp.
Purol David M.
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