Vibration damper

Details Vibration damper Vibration damper

1996-09-10

1998-03-24

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Including seal or guide

18832215, 277160, F16F 936

Patent

active

057302634

ABSTRACT:
A vibration damper includes a pressure tube in which a piston on a piston rod which can move axially is guided by means of a piston rod guide which closes the pressure tube. The piston divides the pressure tube which is filled with damping medium into two working chambers. A piston ring which covers a peripheral area of the piston has an essentially U-shaped cross section with retaining surfaces, whereby the retaining surfaces are supported on the upper and lower side of the piston. On at least one side of the piston, at least a portion of the piston on which the retaining surfaces of the piston ring are engaged has a profiled surface. The profiled surface is configured such that the distance between one side of the piston and a hypothetical reference plane which runs parallel to the piston side is alternately less than and greater than a specified size of fit.

REFERENCES:
patent: 1484578 (1924-02-01), Small
patent: 2579699 (1951-12-01), Phillips
patent: 2719767 (1955-10-01), Ernest
patent: 3184245 (1965-05-01), Woolcott

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