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:
May. 05, 2026
Filed:
Mar. 27, 2023
Applicant:
Horiba Stec, Co., Ltd., Kyoto, JP;
Inventor:
Kazuya Shakudo, Kyoto, JP;
Assignee:
HORIBA STEC, Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 1/54 (2006.01); F16K 1/34 (2006.01); F16K 1/36 (2006.01); F16K 1/38 (2006.01); F16K 1/42 (2006.01); F16K 25/00 (2006.01); F16K 31/00 (2006.01); F16K 37/00 (2006.01);
U.S. Cl.
CPC ...
F16K 1/42 (2013.01); F16K 1/34 (2013.01); F16K 1/36 (2013.01); F16K 1/38 (2013.01); F16K 1/54 (2013.01); F16K 25/005 (2013.01); F16K 31/007 (2013.01); F16K 37/005 (2013.01);
Abstract
The present invention improves the sealability of a fluid control valve, and includes a valve seat having a flat valve seat surface and a valve plug having a flat sitting surface sitting on the valve seat surface. A first surface that is one of the valve seat surface and the sitting surface has a surface hardness higher than a surface hardness of a second surface that is the other one of the valve seat surface and the sitting surface.