Automatic door opener with magnetic clutch

Details Automatic door opener with magnetic clutch Automatic door opener with magnetic clutch

2008-09-02

2008-09-02

Redman, Jerry (Department: 3634)

Movable or removable closures

With operator for movably mounted closure

Operating lever or link and closure swing about parallel axes

C192S01800B, C192S090000

Reexamination Certificate

active

11269061

ABSTRACT:
An automatic door opener (10) for opening or closing a door (28) includes a motor (14) driving a drive shaft (50) and an opener arm (18) connected to the door (28) and being responsive to rotation of the drive shaft (50) for moving the door (28) to an open or closed position. A clutch (46) operable to disengage the drive shaft (50) from the opener arm (18) is provided in the event of the door (28) engaging an obstacle, electric power being unavailable, or the door being fully open or fully closed. The door opener (10) may also include a brake (48) for selectively preventing movement of the door (28). Various embodiments of the invention are provided, including an electromagnet (80) and an electromagnetic brake (114).

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English Language Abstract for JP2001090431 of Nabco Ltd., for “Open-Close Driving Device For Swing Door”, Publication Date: Mar. 3, 2001.

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