Hydraulic shovel

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9790659
APP PUB NO 20160024749A1
SERIAL NO

14775256

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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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 (31) connected to a boom actuator (24) and a bucket actuator (28); a second pump (32) connected to an arm actuator (26) and the boom actuator (24); a third pump (33) connect to the arm actuator (26); a boom control valve (54) interposed between the first pump (31) and the boom actuator (24); an arm control valve (56) interposed between the second pump (32) and the arm actuator (26); a bucket control valve (58) interposed between the first pump (31) and the bucket actuator (28); a boom merging valve (55) for speed increase interposed between the second pump (32) and the boom actuator (24); and an arm merging valve (57) for speed increase interposed between the third pump (33) and the arm actuator (26).

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First Claim

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Patent Owner(s)

  • KOBELCO CONSTRUCTION MACHINERY CO., LTD.;KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.);KOBE STEEL, LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Maekawa, Satoshi Hiroshima, JP 46 347
Nanjo, Takao Kobe, JP 10 96
Oguma, Shota Kobe, JP 4 15
Sugano, Naoki Kobe, JP 34 261
Ueda, Koji Hiroshima, JP 174 1361

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