Door hold open device

Details Door hold open device Door hold open device

1989-10-04

1991-12-17

Gall, Lloyd A.

Closure fasteners

Bolts

Multiple

49 31, 49379, 292 92, 292201, 292278, E05B 6510

Patent

active

050729730

ABSTRACT:
A door hold open device for use with fire doors connected to a door closer unit. The hold open device has a latching means that automatically unlatches if the power supply drops below a predetermined threshold or a person attempts to disconnect the power supply. The device includes an electrical actuating means for unlatching the held open door. The actuating means allows a door to be latched open without constant current being supplied to the actuating means, so battery power is possible. The invention may be used with any door closer unit, does not require special wiring, and may include a self-contained power supply and an integral smoke detector.

REFERENCES:
patent: 3771823 (1973-11-01), Schnarr
patent: 3873892 (1975-03-01), Dettling et al.
patent: 4040143 (1977-08-01), Lasier et al.
patent: 4135377 (1979-01-01), Kleefeldt et al.
patent: 4148092 (1979-04-01), Martin
patent: 4499462 (1985-02-01), Stoesser et al.
patent: 4506407 (1985-03-01), Downey
patent: 4764838 (1988-08-01), MacFarlane
patent: 4803482 (1989-02-01), Verslycken

Affiliated with

Also associated with

Rating

Door hold open device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Door hold open device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door hold open device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-832383