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:
Jul. 19, 2016
Filed:
Feb. 02, 2015
Hitachi Construction Machinery Co., Ltd., Bunkyo-ku, Tokyo, JP;
Seiji Hijikata, Tsukuba, JP;
Kouji Ishikawa, Kasumigaura, JP;
Takatoshi Ooki, Kasumigaura, JP;
Shinya Imura, Toride, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
Provided is a construction machine comprising an energy recovery device for recovering hydraulic fluid energy from a hydraulic actuator and being capable of achieving excellent operability even when the power of the prime mover is changed. The construction machine comprises an engine, a hydraulic pump, a plurality of hydraulic actuators-, a plurality of control valves-, a plurality of operating devices-, an energy recovery device, an operation mode selector switch, an engine revolution speed dial, a pressure sensor, and a controllerwhich controls the flow rate of hydraulic fluid recovered by the energy recovery device based on input signals from the operation mode selector switch, the engine revolution speed dial and the pressure sensor.