Door closer with a compressible braking sleeve

Details Door closer with a compressible braking sleeve Door closer with a compressible braking sleeve

1982-02-12

1984-12-11

Silverberg, Fred Andrew

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

Checks and closers

Pneumatic

16 86R, 16337, 92 10, 92 85R, 92 85B, E05F 316

Patent

active

044869177

ABSTRACT:
A door closer includes a spring-loaded piston forming part of a conventional pneumatic dashpot, which retards the speed of a door during closing, and an elastomeric sleeve which is longitudinally compressed during opening of the door to retard the speed of the door during opening and to apply substantial resistance to further opening movement as the door approaches its fully open position. Closing speed of the door is also initially retarded by the compressed sleeve.

REFERENCES:
patent: 2650386 (1953-09-01), Edwards
patent: 2897534 (1959-08-01), Pickerell
patent: 2940552 (1960-06-01), Freyler
patent: 3408683 (1968-11-01), Zahn
patent: 4357731 (1982-11-01), Strauss

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