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:
Apr. 14, 2015
Filed:
Jan. 15, 2011
Peter Bruck, Althornbach, DE;
Markus Bill, Heusweiler, DE;
Frank Schulz, Blieskastel-Bierbach, DE;
Hydac Fluidtechnik GmbH, Sulzbach/Saar, DE;
Abstract
A valve device includes a housing () and a valve piston () axially displaceable in a piston bore () of housing (). First and second load connections (A, B) can alternately be connected to a pressure connection (P) and to tank connections (T, T) by moving the piston from an idle position by first and second solenoids (). First and second pilot control chambers () pressurize first and second piston back sides () of the valve piston (). The pressure in the pilot control chambers () is controlled by first and second pilot control pistons () movable by the solenoids (). The pilot control chambers () are connected via a connection () to the pressure connection (P). The pilot control pistons () open or close connections () between the pilot control chambers () and the tank connections (T, T).