Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Patent
1979-02-21
1981-05-19
Caun, Peter M.
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
160168R, E06B 926
Patent
active
042678757
ABSTRACT:
A clutch mechanism (9a, 9b) for a vertical venetian blind is disclosed in which a first clutch part (9a) is mounted for sliding relationship on, but non-rotatable with respect to, a rotatable drive shaft (8). A second clutch part (9b) has a cylinderical portion (9e) surrounding the hub (9f) of the first clutch part (9a). The second clutch part (9b) is mounted for rotation about and slidably movable along the axis of drive shaft (8). Toothed gear faces (10a, 10b) on clutch parts (9a, 9b) are engageable upon rotation of the drive shaft (8) to rotate a hook (14) carrying a slat (1b) to rotate the slat. The walls (2a, 2b) of the housing (2) are resilient to permit axial engagement and disengagement of the gear faces (10a, 10b). When the slat (1b) has reached the limit of its travel, a worm (11) on part (9b) engages a stop (15or 16), preventing further rotation of part (9e). Continued torque applied to part (9a) forces parts (9a and 9b) apart against the resilient pressure applied thereto by the walls (2a, 2b) of housing (2). After the excess torque is released, the walls (2a, 2b) resiliently re-engage gear faces (10a, 10b) by moving parts (9a, 9b) toward each other.
REFERENCES:
patent: 3028910 (1962-04-01), Bopp et al.
patent: 3455364 (1969-07-01), Fukuka
patent: 3463219 (1969-08-01), Osterholz
patent: 3860056 (1975-01-01), Bruneau
patent: 3996988 (1976-12-01), de Wit
patent: 4122885 (1978-10-01), Marotto
Caun Peter M.
Hunter Douglas International N.V.
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