The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 2004
Filed:
Aug. 02, 2002
Adolf Adrian, Ennepetal, DE;
Andreas Nevoigt, Hagen, DE;
ThyssenKrupp Bilstein GmbH, Ennepetal, DE;
Abstract
A seal for hydraulically sealing a piston rod that travels axially into and out of a housing, preferably in a hydraulic dashpot. The seal comprises a preferably resilient-plastic sealing component ( ). The sealing component is provided with one or more sharp ridges ( , & ) that rest against the piston rod, is tensioned across an elastomeric component ( ), and is radially and axially secured along with the latter in a seal holder ( ). The sealing component has an axial cylindrical wall ( ) and a radial annular flange ( ). The wall rests snug against the piston rod. The elastomeric component is annular and is provided with an inner surface ( ) that tapers in toward the center of the housing and that the wall rests against. The outer surface of the elastomeric component is accommodated subject to radial tension in a setback ( ) in the seal holder. The object is a seal that will satisfactorily prevent the escape of fluid at low temperatures, whereby the sealing component will be subjected to minimal force at high temperatures. The radial tension accordingly varies along the axial height ( ) of the elastomeric component.