Automatic door closer

Details Automatic door closer Automatic door closer

1980-06-09

1982-09-21

Reynolds, W. Carter

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

Checks and closers

Liquid

16 58, E05F 310

Patent

active

043499392

ABSTRACT:
An automatic door closer in which a piston operatively connected to the door to be moved in axial direction during turning of the door in either direction from a closed to an open position divides the fluid filled housing of the door closer into two pressure compartments which are connected by two channels in which adjustable throttles are arranged to dampen the movement of the door or to be completely closed to prevent passage of fluid through the channels to hold the door in any open position.

REFERENCES:
patent: 3137888 (1964-06-01), Blom
patent: 3246362 (1966-04-01), Jackson
patent: 3584331 (1971-06-01), D'Hooge
patent: 4064589 (1977-12-01), Bejarano et al.

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