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:
Oct. 17, 2017
Filed:
Feb. 27, 2014
Kobe Steel, Ltd., Kobe-shi, JP;
Kobelco Construction Machinery Co., Ltd., Hiroshima-shi, JP;
Naoki Sugano, Kobe, JP;
Takao Nanjo, Kobe, JP;
Shota Oguma, Kobe, JP;
Satoshi Maekawa, Hiroshima, JP;
Koji Ueda, Hiroshima, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima-shi, JP;
Abstract
Provided is a hydraulic shovel capable of moving a boom, an arm, and a bucket at respective adequate speeds even during complex operations thereof, without a significant pressure loss. This hydraulic shovel includes: a first pump () connected to a boom actuator () and a bucket actuator (); a second pump () connected to an arm actuator () and the boom actuator (); a third pump () connect to the arm actuator (); a boom control valve () interposed between the first pump () and the boom actuator (); an arm control valve () interposed between the second pump () and the arm actuator (); a bucket control valve () interposed between the first pump () and the bucket actuator (); a boom merging valve () for speed increase interposed between the second pump () and the boom actuator (); and an arm merging valve () for speed increase interposed between the third pump () and the arm actuator ().