Patent · US Expired

Vibration damper

US5730263A · kind A · utility

10Cited by

4References

20Claims

0Family size

Assignee

Fichtel & Sachs · DE

Inventors

Manfred Grundei · Niederwerrn, DE
Gunther Braun · Wuppertal, DE
Otto Samonil · Niederwerrn, DE
Sabine Lack · Schweinfurt, DE

Key dates

Filing date	Sep 10, 1996
Grant date	Mar 24, 1998
Priority date	—
Expiry date	Sep 10, 2016

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05C2225/04
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.