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:
Dec. 15, 1998
Filed:
Apr. 26, 1996
Bruno Deigner, Schweinfurt, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
A vibration damper for a motor vehicle is taught, which vibration damper has a cylinder tube in which a piston rod which is centered by a piston rod guide can move axially. A container tube encloses the cylinder tube, and the container tube is made of a material which has a significantly higher coefficient of thermal expansion than the material of the cylinder tube. Aluminum is an example if the container tube material. A compensation device compensates for the length difference between the cylinder tube and the container tube at temperatures below and above the temperature at which the vibration damper is manufactured. The container tube is characterized by the fact that preferably at least two expansion beads are formed in the wall of the container tube. The expansion beads compensate for thermal changes in length of the container tube and hold the cylinder tube under a bias with respect to the container tube over the entire range of operating temperatures.