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:
Feb. 10, 2009
Filed:
Jul. 01, 2005
Hans-gerd Brunneke, Georgsmarienhuette, DE;
Christian Loesche, Stemwede, DE;
Hans-Gerd Brunneke, Georgsmarienhuette, DE;
Christian Loesche, Stemwede, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A pneumatic spring-vibration damper unit is provided for absorbing shocks on wheels and chassis parts of motor vehicles. A variable air chamber is delimited by a rolling bellows which is disposed between a first subassembly that is fixed to the vehicle body and is provided with a vibration damper system and a second subassembly that is fixed to the vehicle chassis and is movable therewith. A piston rod connects the first subassembly located at the vehicle body end and the second subassembly located at the chassis end and whose free end located at the vehicle body end is accommodated inside a cylinder tube of the vibration damper system so as to be longitudinally movable by means of a piston. The piston rod () is guided within the cylinder tube () of the vibration damper system () so as to be longitudinally movable with the aid of a drag bearing arrangement (). This allows the longitudinal axis of the piston rod to be angularly deflected relative to the central longitudinal axis () of the cylinder tube () while a joining element () which is fastened to the piston rod () and the piston () by a respective ball-and-socket joint unit () is positioned between the piston rod () and the piston ().