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. 05, 2012
Filed:
Aug. 06, 2010
Atsushi Matsumoto, Osaka, JP;
Kaoru Hirata, Osaka, JP;
Ryousuke Dohi, Osaka, JP;
Nobukazu Ikeda, Osaka, JP;
Kouji Nishino, Osaka, JP;
Atsushi Matsumoto, Osaka, JP;
Kaoru Hirata, Osaka, JP;
Ryousuke Dohi, Osaka, JP;
Nobukazu Ikeda, Osaka, JP;
Kouji Nishino, Osaka, JP;
Fujilin Incorporated, Osaka, JP;
Abstract
A control valve has a body that forms a valve chamber and a valve seat, a metal diaphragm installed inside the valve chamber and making contact with and departing from the valve seat, an actuator box fixed to the side of the body, a piezoelectric element installed inside the actuator box to thrust the metal diaphragm through mediation of a metal diaphragm presser by elongating downward when voltage is applied, a conical spring mechanism that absorbs elongation of the piezoelectric element at the time when the metal diaphragm makes contact with the valve seat and a prescribed thrust is applied to the valve seat and the like, and a preload mechanism that applies upward compressive force to the piezoelectric element all the time wherein the compressive force applied to the piezoelectric element is externally adjustable.