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. 17, 2021
Filed:
Mar. 16, 2017
Primetals Technologies Austria Gmbh, Linz, AT;
Gudrun Mikota, Gallneukirchen, AT;
Josef Mikota, Gallneukirchen, AT;
Abstract
A hydraulic valve () includes an actuation device () for a control piston (). The valve () is simple, robust, and insensitive to dirt. The is an actuation device () has a flexurally rigid metal plate (), with an outer region fixed to the housing () in a stationary manner. A piezoelectric actuator () can bend a central region of the metal plate (); and a pressure chamber () is filled with a pressurized liquid during operation. The pressure chamber () is delimited by the housing (), the metal plate (), and the control piston (). The metal plate () seals the pressure chamber (), and the pressure chamber () acts on the control piston (). A surface area AP of the metal plate () over the pressure chamber () is larger than the cross-sectional area Aof the control piston ().