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:
Aug. 25, 2015
Filed:
Jan. 15, 2011
Frank Schulz, Blieskastel-Bierbach, DE;
Peter Bruck, Althornbach, DE;
Markus Bill, Heusweiler, DE;
HYDAC FLUIDTECHNIK GMBH, Sulzbach/Saar, DE;
Abstract
A valve device includes a valve housing () and a valve piston () axially displaceably in a housing bore (). By valve piston movement, load connections (A, B) can alternately be connected to a pressure connection (P) and to a tank connection (T, T) by solenoid magnets (). Pilot control chambers () pressurize piston back sides (). The control chambers () are connectable via fluid-conducting connections () to the pressure connection (P). Pilot control pistons () release or close fluid-conducting connections () between control chambers () and the tank connection (T, T). One pilot control piston () includes a ring channel () controlling a fluid-conducting connection () between a pilot control chamber () and a tank connection (T, T).