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:
Jul. 28, 2020
Filed:
May. 18, 2017
Ckd Corporation, Komaki-shi, Aichi, JP;
Tatsuhito Aoyama, Kasugai, JP;
CKD CORPORATION, Komaki-shi, JP;
Abstract
A fluid control valve for controlling high-temperature fluid includes: a valve body including a valve chamber communicating with first and second flow passages, and a valve seat provided in the valve chamber; a metal diaphragm that contacts with and separates from the valve seat; a stem that moves the metal diaphragm up and down; and an actuator that drives the stem. The first flow passage includes a first orifice having a diameter set to 50% or less of a diameter of the second flow passage. Alternatively, the second flow passage includes a second orifice having a diameter set to 50% or less of the diameter of the second flow passage. The diameter of the second flow passage is calculated by converting a cylindrical flow passage area defined between the valve seat and the metal diaphragm when separated from the valve seat into a diameter of a circular flow passage.