Door closer for the non-fire side of a fire-door safety installa

Details Door closer for the non-fire side of a fire-door safety installa Door closer for the non-fire side of a fire-door safety installa

1996-07-25

1998-01-20

Mah, Chuck

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

Closers

Spring and gear

16 485, 16 52, E05F 108, E05F 1520

Patent

active

057090092

ABSTRACT:
A door control device for use on a non-fire side of a fire-door mounted in a door frame in a fire-door safety installation has a door closer assembly filled with a hydraulic damping fluid and attached to a non-fire side of the fire-door by at least one fastener; a door control arm pivotally connected to the door frame at a first end and to the door closer assembly at a second end; and the hydraulic damping fluid is one of a group of fire resistant hydraulic fluids.

REFERENCES:
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patent: 3875612 (1975-04-01), Poitras
patent: 3934306 (1976-01-01), Farris
patent: 4148111 (1979-04-01), Lieberman
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patent: 4179092 (1979-12-01), Miyazawa
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patent: 4267619 (1981-05-01), Suska
patent: 4360443 (1982-11-01), Durr, Jr.
patent: 4831687 (1989-05-01), Lin et al.
patent: 4967444 (1990-11-01), Korling et al.
patent: 5187835 (1993-02-01), Lee
Hydraulics & Pneumatics, vol. 31, No.5, 1978, XP002015118 Protheroe: "Fire Resistant Hydraulic Fluids: New Capabilities Expand Applications".

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