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:
Sep. 30, 2025
Filed:
Sep. 01, 2022
Applicant:
Caterpillar Sarl, Geneva, CH;
Inventors:
Hideki Nakajima, Akashi, JP;
Toshikazu Koga, Akashi, JP;
Assignee:
Caterpillar SARL, Geneva, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 13/042 (2006.01); E02F 9/22 (2006.01); F15B 11/16 (2006.01);
U.S. Cl.
CPC ...
F15B 13/0426 (2013.01); E02F 9/2235 (2013.01); E02F 9/226 (2013.01); E02F 9/2285 (2013.01); E02F 9/2296 (2013.01); F15B 11/16 (2013.01); F15B 2211/30525 (2013.01); F15B 2211/329 (2013.01); F15B 2211/355 (2013.01); F15B 2211/625 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/665 (2013.01); F15B 2211/6653 (2013.01); F15B 2211/71 (2013.01);
Abstract
To provide a pilot pressure control device capable of securing a pilot pressure with an inexpensive configuration. There is equipped with a controller configured, when a pump pressure drops to a predetermined pressure or below resulting from the drive of a fluid pressure actuator, to control so as to throttle an opening of a spool that is the cause of the drop in the pump pressure. The pump pressure can be maintained with an inexpensive configuration without increasing the size of an accumulator for pressure accumulation, and the pilot pressure can be secured by the pilot circuit from this pump pressure.