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:
Mar. 12, 2002
Filed:
Apr. 24, 2000
Christoph Behmenburg, Lauenau, DE;
Uwe Folchert, Lauenau, DE;
Heinz Job, Neustadt, DE;
Helge Westerkamp, Hannover, DE;
Continental Aktiengesellschaft, Hannover, DE;
Abstract
The invention relates to a level control arrangement for vehicles having air springs ( ) to ( ) and a pneumatically controllable directional valve ( ). A residual pressure holding function and an overpressure function are integrated into the directional valve ( ). The directional valve ( ) is controlled by the air pressure in the air springs ( ) to ( ). The air pressure can be applied via a control line ( ) to a control input ( ) of the directional valve ( ). The air from the air springs ( ) to ( ) is released with the aid of the venting line ( ). The venting line ( ) is guided separately from the control line ( ) through the directional valve ( ). In this way, a large air flow can be conducted through the venting line ( ) without the static air pressure in the control space ( ) of the directional valve ( ) being reduced. The venting line is blocked by a stepped piston ( ) of the directional valve when no air is to be released from the air springs.