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. 22, 2004
Filed:
Nov. 12, 2002
Kabushiki Kaisha Fujikin, Osaka, JP;
Abstract
A flow controller ( ), comprising a valve body ( ) having flow paths forming an inlet and an outlet of fluid, a diaphragm ( ) held fixedly between the valve body and a bonnet ( ), and an operating mechanism ( ) moving the diaphragm vertically, wherein the valve body flow paths communicate with each other through a projection-free communication path ( ), the a diaphragm is formed so that, when lowering, it comes into close contact with the communication path so that it closes the flow path and, when rising, the center part thereof is recessed so that an area near the outer peripheral part is raised, and a curved surface ( ), to which the outer upper surface ( ) of the raised part is closely fitted, is formed on a bonnet on the inner lower surface of a diaphragm holding part ( ).