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:
Jun. 09, 2026
Filed:
Apr. 04, 2023
Kawasaki Jukogyo Kabushiki Kaisha, Kobe, JP;
Hideyasu Muraoka, Kobe, JP;
Nobuyuki Kinoshita, Kobe, JP;
Yoji Yudate, Kobe, JP;
Yoshihiko Hata, Kobe, JP;
Yuki Kuwabara, Kobe, JP;
Yuichi Miyagi, Kobe, JP;
KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe, JP;
Abstract
This hydraulic drive device supplies and drains a working fluid to and from a hydraulic cylinder and includes: a plurality of hydraulic pump motors including suction ports and discharge ports; a plurality of electric motors respectively connected to the plurality of hydraulic pump motors; and a directional control valve that is connected to a meter-out passage and connects the hydraulic cylinder to the meter-out passage to drain the working fluid from the hydraulic cylinder to the meter-out passage. The suction ports of the plurality of hydraulic pump motors are connected in parallel with the meter-out passage.