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. 16, 2015
Filed:
Nov. 06, 2012
Kobelco Construction Machinery Co., Ltd., Hiroshima-shi, JP;
Yoshimi Saotome, Hiroshima, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima-shi, JP;
Abstract
Provided is a construction machine including a first circuit with a boom cylinder, a second circuit with an arm cylinder and a third circuit with a slewing motor, first to third pumps discharging respective first to third pump fluids, a first flow combining valve having a first combining position for the third and first pump fluids and a first combination limiting position, a second flow combining valve having a second combining position for the third and second pump fluids and a first combination and a second combination limiting position, and a flow combination switching control section which switches the flow combining valves to their respective combination limiting positions during an arm attracting operation and switches the combining valves to their respective combination limiting positions during a single slewing operation or during a boom raising operation with no arm operation.