Automatic door closer and process for assembly of same

Details Automatic door closer and process for assembly of same Automatic door closer and process for assembly of same

1996-10-23

1998-11-10

Mah, Chuck

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Checks and closers

Liquid

16 71, E05F 310

Patent

active

058325611

ABSTRACT:
An automatic door closer has a piston assembly dividing a housing into two pressure medium chambers. The piston assembly is moveable by a cam roller in camming engagement with a cam that rotates during an opening or closing movement of a door. The piston assembly includes two parts, a coupling part and an outer part. The coupling part provides for connection to the cam roller and the outer part seals one pressure medium chamber from the other pressure medium chamber. The coupling part and the outer part are connected firmly together by a connecting element.

REFERENCES:
patent: 1978736 (1934-10-01), Bommer
patent: 3724023 (1973-04-01), Tillmann
patent: 4785493 (1988-11-01), Tillmann et al.
patent: 5291630 (1994-03-01), Brown

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