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. 02, 2025
Filed:
Jul. 06, 2021
Applicant:
Nabtesco Corporation, Tokyo, JP;
Inventor:
Tsutomu Yasui, Tokyo, JP;
Assignee:
NABTESCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K 37/00 (2006.01); F16K 31/06 (2006.01); G01D 5/243 (2006.01);
U.S. Cl.
CPC ...
F16K 37/0041 (2013.01); F16K 31/06 (2013.01); G01D 5/243 (2013.01);
Abstract
A position estimation apparatus includes: a supplying unit that supplies a high-frequency signal Sh to a solenoid for driving a spool of an electromagnetic valve; an acquisition unit that acquires electrical information Je related to the solenoid supplied with the high-frequency signal Sh, and an estimation unit that estimates a position of the spool based on a result of comparison between the electrical information Je acquired by the acquisition unit and the high-frequency signal Sh supplied from the supplying unit.