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:
Aug. 15, 1995
Filed:
Sep. 09, 1993
Robert Pradel, Rothlein-Heidenfeld, DE;
Stefan Schiffler, Schonungen-Forst, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
A double tube vibration damper comprises a pressure tube and a container tube. Two working chambers are defined by the piston within the pressure tube. A compensation space is provided between the pressure tube and the container tube. The pressure tube extends axially between a bottom wall of the container tube and a piston rod guide secured to the container tube. A spring is in series with the pressure tube between the bottom wall and the piston rod guide. This spring compensates for different length variations of the pressure tube and the container tube. This spring is always under compressional stress throughout the operational range of temperature.