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:
Nov. 10, 2015
Filed:
May. 09, 2012
Naoki Sugano, Kobe, JP;
Satoshi Maekawa, Kobe, JP;
Katsuki Yamagata, Akashi, JP;
Takaharu Michida, Akashi, JP;
Hiroo Kondo, Akashi, JP;
Naoya Kitazumi, Akashi, JP;
Naoto Hori, Akashi, JP;
Naoki Sugano, Kobe, JP;
Satoshi Maekawa, Kobe, JP;
Katsuki Yamagata, Akashi, JP;
Takaharu Michida, Akashi, JP;
Hiroo Kondo, Akashi, JP;
Naoya Kitazumi, Akashi, JP;
Naoto Hori, Akashi, JP;
KABUSHIKI KAISHA KOBE SEIKO SHO, Kobe-shi, JP;
KOBELCO CRANES CO., LTD., Tokyo, JP;
Abstract
Provided is an apparatus provided in a working machine to lower a load, comprising a hydraulic pump, a hydraulic actuator, a manipulation device having a manipulation member, a meter-in flow control device, a meter-out flow control device, a back pressure valve, a regeneration fluid passage branched from the meter-out fluid passage at a position upstream of the back pressure valve and merged with the meter-in fluid passage, and a check valve. The meter-in flow control device controls a meter-in flow rate in a region of the meter-in fluid passage upstream of a merging point with the regeneration fluid passage. The meter-out flow control device controls a meter-out flow rate in a region of the meter-out fluid passage upstream of a branching point of the regeneration fluid passage so as to make the meter-out flow rate be greater than the meter-in flow rate.