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:
Dec. 16, 2025
Filed:
Jan. 04, 2024
Ihi Corporation, Tokyo, JP;
Seiei Masuda, Tokyo, JP;
IHI Corporation, Tokyo, JP;
Abstract
A spool valve includes: a sleeve extending in an axial direction thereof, including inlet and outlet ports for working fluid; a spool housed in the sleeve; a biasing device that presses a base end of the spool toward a tip end of the spool; and a pressure detecting port opening toward the tip end. The spool includes: first and second land sections; a groove section located between the first land section and the second land section, having a width in the axial direction to connect between the inlet port and outlet port; a recess portion formed on an outer peripheral surface of the second land section; and a connection passage for the working fluid formed in the second land section, connecting between the groove section and the recess portion. A path hole is formed in the sleeve facing the recess portion of the spool.