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:
Jan. 13, 2026
Filed:
Aug. 09, 2022
Kawasaki Jukogyo Kabushiki Kaisha, Kobe, JP;
KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe, JP;
Abstract
A hydraulic drive device drives at least first to third hydraulic devices by supplying a working fluid to the hydraulic devices. The hydraulic drive device includes at least first and second pumps respectively connected to the first and second hydraulic devices, a merge passage that is connected to the pumps and in which streams of the working fluid discharged from the pumps join together, a flow rate control valve that is connected to the merge passage and the third hydraulic device and controls the flow rate of the working fluid flowing from the merge passage to the third hydraulic device by adjusting an opening degree thereof according to a control signal, and a pressure compensation valve that is provided on a third hydraulic device side relative to a merge point at which the streams join together and maintains a pressure difference of the control valve at a predetermined pressure.