Air damper

Details Air damper Air damper

1995-09-28

1997-12-16

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Including seal or guide

18832222, 277 29, 277165, F16F 936

Patent

active

056974779

ABSTRACT:
An air damper includes: a piston adapted to reciprocate in a cylinder; an annular recessed portion formed along an outer periphery of the piston; a sealing member fitted in the recessed portion in a slidable manner, adapted to slidingly contact an inner peripheral surface of the cylinder, and forming air chambers on both sides of the piston, respectively, together with the piston; a communicating device allowing the air chambers formed on both sides of the piston to communicate with each other or not to communicate with each other depending on a stopping position of the sealing member; and a reduced-diameter portion formed by reducing a diameter of the cylinder on one end side thereof so as to gradually increase a frictional force between an inner periphery of the reduced-diameter portion and the sealing member.

REFERENCES:
patent: 4307875 (1981-12-01), Schnitzius et al.
patent: 4819770 (1989-04-01), Hahn
patent: 4877115 (1989-10-01), Bauer et al.
patent: 5325943 (1994-07-01), Ralph
patent: 5409087 (1995-04-01), Angermann et al.

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