Worm drive for setting the angular position of vertical...

Details Worm drive for setting the angular position of vertical... Worm drive for setting the angular position of vertical...

E - Fixed Constructions

06

B

160/1

E06B 9/36 (2006.01)

Patent

CA 1316096

ABSTRACT OF THE DISCLOSURE A worm drive is disclosed for adjusting the angular position of vertical lamella blinds, the worm drive comprises a vertical shaft, arranged inside a lamella carrier housing, which shaft carries a pinion torsionally connected thereto, and has one end joined to a lamella of the blind. A worm gear, driven by a drive shaft, engages with the pinion. The worm drive of the invention is characterized by a worm gear having an axial center opening and held by a snap-on sleeve on a hub disposed in the lamella carrier. The worm gear is provided with a series of indentations that engage with cams arranged on the outside circumference of the snap-on sleeve so as to form a friction clutch that allows over rotation of the drive shaft without damaging the components of the worm drive. The construction of the worm drive of the invention significantly simplifies assembly, and reduces the structural depth of the lamella carrier housing.

605720

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