Control unit for lift system for coverings for architectural...

Details Control unit for lift system for coverings for architectural... Control unit for lift system for coverings for architectural...

Category

E - Fixed Constructions

Subcategory

06

Subsubcategory

B

IPC codes

E06B 9/322 (2006.01) A47H 5/00 (2006.01)

Type

Patent

Patent number

CA 2643625

Description

A control unit for controlling a lift system in a covering for an architectural opening includes a drive assembly and a brake assembly. The drive assembly includes a spool about which a pull cord can be wrapped or unwrapped and a spring for biasing the spool in a direction to wrap the pull cord thereabout. A drive gear is operatively associated with the spool so that upon a pulling of the pull cord and unwrapping of the cord from the spool, the drive gear is shifted axially into engagement with a driven gear in the brake assembly. The driven gear under such circumstances rotates a driven shaft, which in turn rotates a lift shaft in the covering to raise the covering from an extended position to a retracted position.

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