Automatic locking mechanism for a revolving shutter

Details Automatic locking mechanism for a revolving shutter Automatic locking mechanism for a revolving shutter

1981-06-30

1984-07-10

Moore, Richard E.

Closure fasteners

Bolts

Hooked end

160133, E05C 304

Patent

active

044589298

ABSTRACT:
The subject of the invention is an automatic locking mechanism for a revolving shutter to protect the latter against unauthorized pulling up from the outside, using a locking device which is moved into the locking position after the revolving-shutter casing has been lowered. The device has a lateral axle bearing, with a round bearing element (11) for a belt pulley (2) and a fixed square bearing pin (8) connected thereto and the end of which is designed as a round cylinder. The belt pulley (2) has an annular web (2a) and the roller insertion cap (1) has an annular web (1a), the side webs (1a/2a) having different diameters and interlocking coaxially. A pivotable locking lever (6) engages positively through coinciding gaps. In the lowered state of the revolving-shutter casing, the lever (6) engages with the fixed bearing pin (8) and clamps belt pulley and roller insertion cap against unauthorized turning, so that the revolving-shutter roller connected to the roller insertion cap is also locked.

REFERENCES:
patent: 3102580 (1963-09-01), Greegor

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