Power wheel for tri-fold doors

Details Power wheel for tri-fold doors Power wheel for tri-fold doors

E - Fixed Constructions

06

B

26/187, 160/6

E06B 3/48 (2006.01) E05D 15/26 (2006.01)

Patent

CA 1133380

ROTATIONAL DRIVE ASSEMBLY FOR FOLDING DOORS Abstract of the Disclosure A rotational drive assembly including a cooperating pinion mounted on the shaft act to guide, move and lock the door and housing therefor. The rotational drive assem- bly housing has a cavity into which one or more enlarged lever ends are inserted and secured before assembly of the housing to the shaft. The levers may be stored parallel to the shaft to conserve valuable space when not in use but can be moved transverse to the shaft to increase the mech- anical advantage applied through the housing to the shaft during use. A spring biased pawl controlled by a cam surface on the housing normally prevents rotation of the pinion and, therefore, normally locks the door assemblies in the storage position. Manual rotation of the shaft axially cams the housing and creates rotation of the pawl to permit rotation of the pinion and movement of the door assembly mounted thereon out of the storage position.

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