Door closer and holder

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Liquid

Patent

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Details

16 62, 16 52, E05F 322

Patent

active

047930233

ABSTRACT:
A door closer and holder comprises a cylinder shell having a piston sealingly reciprocable therein. A spring biases the piston toward one end of the shell, and the piston is connected through the ususal apparatus to the door. At the one end the operating rod of a shuttle valve extends into the shell and is engaged by the piston as it approaches the end. The shuttle valve selectively directs the return fluid flow through sweep- and latch-control valves. The assembly also includes a solenoid-operated "bullet" which closes off the return flow to hold the door open. The angle of the openness at which the door is held may be selected by setting a cam on the holder drive pinion which engages a switch to activate the solenoid.

REFERENCES:
patent: 4050114 (1977-09-01), Zunkel
patent: 4267619 (1981-05-01), Suska
patent: 4349939 (1982-09-01), Tillman
patent: 4378612 (1983-04-01), Beers
patent: 4414703 (1983-11-01), Schnarr et al.

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