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:
Jun. 22, 2010
Filed:
Apr. 07, 2004
Markus Bill, St. Wendel, DE;
Peter Bruck, Althornbach, DE;
Alois Hoffmann, Saarbrucken, DE;
Hydac Fluidtechnik GmbH, Sulzbach/Saar, DE;
Abstract
A valve, in particular, a proportional seat valve or gate valve, includes a valve housing () and at least three fluid connections () extending through the valve housing. A main piston () extends in the valve housing (). A pilot piston () for executing a pilot control () may be controlled by a current-carrying magnetic device (). During an open pilot control (), fluid from one () of the connectors (), controlled by the main piston (), reaches the connector (), controlled by the pilot piston (), by a cross-sectional narrowing () in the main piston (). The pilot control () and, as a result of the corresponding pressure drop, the main piston () achieves a control position, controlling both fluid connections () with regard to fluid amount.