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. 28, 2021
Filed:
Aug. 01, 2019
Kawasaki Jukogyo Kabushiki Kaisha, Kobe, JP;
Caterpillar Sarl, Geneva, CH;
Seiji Aoki, Kobe, JP;
Yoshiyuki Tode, Kakogawa, JP;
Masahiro Ohira, Kobe, JP;
Hideki Nakajima, Akashi, JP;
KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe, JP;
CATERPILLAR SARL, Geneva, CH;
Abstract
A hydraulic circuit of a construction machine includes: a first pump line that connects a delivery port of a pump to a pump port of a first direction-switching valve; a second pump line that is branched off from the first pump line and is connected to a pump port of a second direction-switching valve; and a priority valve provided on the second pump line. The priority valve is configured to: fully open the second pump line when a pressure difference between a delivery pressure of the pump and a load pressure of a first actuator is greater than a setting value; and decrease an opening degree of the second pump line in accordance with decrease in the pressure difference when the pressure difference is less than the setting value.