Flexible or portable closure – partition – or panel – Roll type – With rotating means
Patent
1983-01-17
1985-06-18
Caun, Peter M.
Flexible or portable closure, partition, or panel
Roll type
With rotating means
E06B 9208
Patent
active
045236208
ABSTRACT:
A combination window shade and clutch assembly is provided to prevent over-tensioning of the spring motor of the window shade. The clutch assembly includes spool means connected to one end of the spring motor and cup means, both movable along the window shade shaft. The spool means and cup means are provided with clutch means in the form of mating, tapered locking surfaces adapted to engage one another. The cup means engages retaining means formed in the rotatable housing of the window shade so that rotation of the housing is transmitted to the spool means through the cup means while their locking surfaces are in engagement. The clutch means interconnecting the cup means and spool means is operable to maintain engagement therebetween to permit tensioning of the spring motor a predetermined number of turns of the cup means and spool means together with window shade housing in one direction, and then is operable to disengage the cup means from the spool means to prevent additional tensioning of the spring motor without restricting further rotation of the housing in such one direction.
REFERENCES:
patent: 350656 (1886-10-01), Brooks
patent: 823452 (1906-06-01), Vickery
patent: 873438 (1907-12-01), John, Jr.
patent: 982444 (1911-01-01), Smith
patent: 1052689 (1913-02-01), Pitman
patent: 1283386 (1918-10-01), Wenzelmann
patent: 1502197 (1924-07-01), Hill
patent: 2350286 (1944-05-01), Michelman
patent: 4427050 (1984-01-01), Toppen
patent: 4429729 (1984-02-01), Winslow
Caun Peter M.
Clopay Corporation
Lieberman Cherney S.
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