Operating mechanism for a blind or shielding device

Details Operating mechanism for a blind or shielding device Operating mechanism for a blind or shielding device

1991-07-18

1995-02-21

Scherbel, David A.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

1601761, 1601781, 160900, 192 8921, E06B 936

Patent

active

053907213

ABSTRACT:
An operating mechanism for a blind or shielding device having angularly adjustable and retractable slats 12, said mechanism comprising a first driven element 27 for pivotally adjusting the angular orientation of the slats and a second driven element 30 for transversely moving the slats towards and away from the retracted position, a common actuating member 22 for driving said first and second driven elements, a coupling device 24 directly coupling said first driven element to said common actuating member, a final engagement and lost motion mechanism 28, 30 for releasibly engaging said common actuating member to said second driven element and allowing entraining of said second driven element after a predetermined number of revolutions of said actuating member neither of two different rotational senses, the final engagement associated with said lost motion mechanism in each rotational sense inducing a reactive force in an axial direction, said reactive force assisting in declutching of said coupling device.

REFERENCES:
patent: 443769 (1890-12-01), Hurford
patent: 1119572 (1914-12-01), Butler
patent: 1193008 (1916-08-01), Fuller
patent: 3455364 (1969-07-01), Fukuoka
patent: 3789905 (1974-02-01), Saito
patent: 4047554 (1977-09-01), Bullat
patent: 4224973 (1980-09-01), Hugin
patent: 4552195 (1985-11-01), Durig et al.
patent: 4557159 (1985-12-01), Gross

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