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:
Jul. 22, 2003
Filed:
Dec. 21, 2001
Volker Gedenk, Hemmingen, DE;
Contitech Luftfedersysteme GmbH, Hannover, DE;
Abstract
A hydraulic spring includes hydraulic volumes ( ). The hydraulic volumes ( ) are, on the one hand, closed off by a spring element ( ) which is vulcanized into an outer ring ( ). On the other hand, the volumes ( ) are delimited by a compensating membrane ( ). The volume ( ) is subdivided by a partition wall ( ) into two chambers ( ), namely, a work chamber ( ), which is next to the spring element ( ), and a compensating chamber ( ), which is next to the compensating membrane ( ). The partition wall ( ) has at least one connecting channel ( ) and the chambers ( ) alternately change in volume and are filled completely with a hydraulic liquid. The partition wall ( ) is configured to be flat in order to achieve a damping element requiring only a low structural elevation. The partition wall plane is orientated transversely to the spring axis. At least one level connecting channel ( ) extends within the flat partition wall ( ). One end of the connecting channel opens into the work chamber ( ) and the other end of the connecting channel opens into the compensating chamber ( ). The at least one connecting channel ( ) is preferably configured to have a spiral shape. Several connecting channels ( ) can be arranged offset relative to each other in the partition wall ( ) and these channels are configured to have a spiral shape.