Pneumatic door closer

Details Pneumatic door closer Pneumatic door closer

1989-07-24

1990-05-01

Seidel, Richard K.

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

Checks and closers

Pneumatic

16 85, 16DIG17, 188300, 92 15, F16F 932, E05F 300

Patent

active

049206095

ABSTRACT:
A door closer is set forth having a housing, a plunger rod in the housing with a plunger at the inner end of the rod, and a main spring around the rod between the plunger and a housing end for urging the rod into the housing. An actuator carried at the housing end with an opening for the rod and mounted for transverse sliding motion relative to the rod, with a spring for urging the actuator into a latch space in the rod is utilized. With the door closer connected to a door, the actuator slides into the latch space when the door has been opened, to hold the door open. A further opening movement raises the actuator out of the latch space and a sleeve maintains the actuator raised, permitting closing of the door.

REFERENCES:
patent: 3105264 (1963-10-01), Truhon
patent: 3578783 (1971-05-01), Loustalet
patent: 4048695 (1977-09-01), Juilfs et al.
patent: 4155433 (1979-05-01), Porter
patent: 4178655 (1979-12-01), Little
patent: 4807855 (1989-02-01), Schuitema
patent: 4815163 (1989-03-01), Simmons

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