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. 19, 2021
Filed:
Aug. 09, 2017
Kobe Steel, Ltd., Kobe, JP;
Naoki Sugano, Kobe, JP;
Satoshi Maekawa, Kobe, JP;
Kobe Steel, Ltd., Kobe, JP;
Abstract
Provided are an energy regeneration device which can regenerate energy of a working fluid discharged from an actuator while controlling a flow rate of the working fluid, and a work machine including the foregoing device. The regeneration device () includes a boom cylinder (), an inertial fluid container (), an oil tank (), an accumulator (), a low-pressure-side opening/closing device (), and a high-pressure-side opening/closing device (). A calculation unit () calculates a duty ratio for opening/closing the low-pressure-side opening/closing device () and the high-pressure-side opening/closing device () in accordance with a desired flow rate of a working fluid discharged from the boom cylinder (). A regeneration control unit () selects alternately the low-pressure-side opening/closing device () and the high-pressure-side opening/closing device () as a destination with which the inertial fluid container () communicates in accordance with the calculated duty ratio, and supplies a discharged working fluid to an accumulator ().