The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1981
Filed:
Feb. 21, 1979
Marinus F Koks, Rotterdam, NL;
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.