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:
Oct. 21, 2025
Filed:
May. 16, 2023
Kobe Steel, Ltd., Kobe, JP;
Tomomitsu Nakai, Takasago, JP;
Akinori Maegawa, Takasago, JP;
KOBE STEEL, LTD., Kobe, JP;
Abstract
A piston axial force information detection unit () detects piston axial force information pertaining to an axial force applied to a piston body (). A friction information storage unit () stores friction information pertaining to a frictional force between a piston seal () and a pressure vessel () when the piston body () moves relative to the pressure vessel (). A drive control unit () controls a drive device () on the basis of the piston axial force information and the friction information. In a holding stroke for controlling the pressure inside the pressure vessel () so as to be constantly held, the drive control unit () controls the drive device () so that the piston body () reciprocates with respect to the pressure vessel ().