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. 01, 2025
Filed:
Sep. 20, 2022
Applicant:
Kosmek Ltd., Kobe, JP;
Inventor:
Akira Arisato, Kobe, JP;
Assignee:
KOSMEK LTD., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 15/18 (2006.01);
U.S. Cl.
CPC ...
F16K 15/1826 (2021.08);
Abstract
Provided is a check valve device having a structure with which pressurized fluid is less likely to leak from a flowpath blocked by a valve. A flowpath is formed in a block, and a main valve and a sub-valve are provided in series along the flowpath. A primary-side chamber, an intermediate chamber, and a secondary-side chamber, which form a section of the flowpath, are formed in that order from the one end of the flowpath to the other end thereof. The main valve and the sub-valve are opened by a pilot valve.