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:
Oct. 05, 2004
Filed:
Feb. 13, 2003
Alois Hoffmann, Saarbrucken, DE;
Hydac Fluidtechnik GmbH, Sulzbach/Saar, DE;
Abstract
The invention relates to a valve that comprises at least one pump connection ( ), one tank connection ( ) and one consumer connection ( ), and a valve piston ( ) that is displaced within the valve box ( ). Said valve piston separates the pump connection ( ) from the tank connection ( ) in at least one blocked position and interacts with an energy accumulator ( ). A fluid stream that flows between the consumer connection ( ) and the tank connection ( ) is controlled by means of a control device ( ). The control device ( ) is configured as a fluid stream control that is integrated in the valve piston ( ) and that allows, contrary to known valves which use a diaphragm construction, reduction, by a constant value, of the volume flow to the consumer in a load-independent manner, thereby allowing for a proportional load-independent control.