Clutch control for roller shades

Details Clutch control for roller shades Clutch control for roller shades

1994-05-12

1996-01-09

Purol, David M.

Flexible or portable closure, partition, or panel

Roll type

With brake or stop

160321, 192 8C, E06B 956

Patent

active

054821053

ABSTRACT:
A spring clutch mechanism for the operation of roller shades and other rollable items. This clutch mechanism is designed to release for raising the shade so as to minimize effort. Whereas prior art clutch mechanisms for roller shades are intended not to slip, or to slip only to save themselves, in this case, lowering of the shade is accomplished by overriding the clutch, causing it to slip. The clutch can be adapted easily to accommodate know shade weights. The inventive design provides superior operating characteristics and, because the clutch can be built with as few as two parts, much lower cost.

REFERENCES:
patent: 3135369 (1964-06-01), Nisenson et al.
patent: 4372432 (1983-02-01), Waine et al.
patent: 4424851 (1984-01-01), Kohayakawa
patent: 4433765 (1984-02-01), Rude et al.
patent: 4729418 (1988-03-01), Rude
patent: 4751953 (1988-06-01), Appel et al.
patent: 4779662 (1988-10-01), Wilk
patent: 4865109 (1989-09-01), Sherman
patent: 5009259 (1991-04-01), Miloslaus
patent: 5029629 (1991-07-01), Cheng-Pei
patent: 5351743 (1994-10-01), Jackson
patent: 5361822 (1994-11-01), Nijs
patent: 5375643 (1994-12-01), Rude

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