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:
Nov. 29, 2016
Filed:
Apr. 01, 2013
Fujikin Incorporated, Osaka, JP;
Ryousuke Dohi, Osaka, JP;
Kouji Nishino, Osaka, JP;
Yohei Sawada, Osaka, JP;
Nobukazu Ikeda, Osaka, JP;
FUJIKIN INCORPORATED, Osaka, JP;
Abstract
In a variable orifice type pressure-controlled flow controller that includes a pressure control unit and a variable orifice unit, computes a flow rate of a fluid distributed through an orifice of the variable orifice unit as Q=KP(Pis an orifice upstream side pressure and K is a constant), and switches a flow control range and performs flow control in the flow control range by changing a set flow rate signal Qs for a flow rate arithmetic and control unit of the pressure control unit and an orifice opening degree setting signal Qz for an orifice opening degree arithmetic and control unit of the variable orifice unit, the variable orifice unit includes the orifice opening degree arithmetic and control unit.