Releasable hold-open device for a door closer

Details Releasable hold-open device for a door closer Releasable hold-open device for a door closer

1983-07-18

1985-03-26

Silverberg, Fred A.

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

Thermally released check or closer

16 49, 16320, 16DIG9, 16DIG10, 16DIG14, 16DIG17, E05F 1520

Patent

active

045064075

ABSTRACT:
A releasable hold-open device for a spring-impelled, regulated door closer has a door motion follower adapted to be releasably held in a door-open position. An actuator is arranged to retain or release the follower under control of a permanent magnet that can be overcome by an electromagnet.

REFERENCES:
patent: 1852609 (1932-04-01), Griffin
patent: 3415562 (1968-12-01), Petersen
patent: 3729770 (1973-05-01), Lasier
patent: 3771823 (1973-11-01), Schnarr
patent: 3964125 (1976-06-01), Tansley
patent: 4040143 (1977-08-01), Lasier et al.
patent: 4185356 (1980-01-01), Kuiralainen et al.

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