Pneumatic hinge

Details Pneumatic hinge Pneumatic hinge

1992-07-23

1993-12-14

Larson, Lowell A.

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

Checks and closers

Pneumatic

E05F 320

Patent

active

052690431

ABSTRACT:
The invention is a pneumatic hinge which makes use of the air pressure action and counter balance to produce a spring-free hinge structuring to improve the ability to interrupt an opening or closing door at one's disposal of the traditional spring hinge, to eliminate its disadvantage as well as to produce more practical value.

REFERENCES:
patent: 1253882 (1918-01-01), Pilson
patent: 1282419 (1918-10-01), Hawkins

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