Hydraulic drive system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9695842
SERIAL NO

14374446

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Importance

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Abstract

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A hydraulic cylinder causes a work implement to be lowered due to the exhaust of hydraulic fluid from a first chamber and the supply of hydraulic fluid to a second chamber. A hydraulic fluid flowpath has a first flowpath and a second flowpath. The first flowpath connects a first pump port and the first chamber. The second flowpath connects a second pump port and the second chamber. The hydraulic fluid flowpath configures a closed circuit between a hydraulic pump and the hydraulic cylinder. A bleed-off flowpath branches off from the first flowpath. A portion of hydraulic fluid exhausted from the first chamber when lowering the work implement flows into the bleed-off flowpath.

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Patent Owner(s)

  • KOMATSU LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Akiyama, Teruo Kokubunji, JP 43 565
Iida, Noboru Chigasaki, JP 53 720
Saito, Koji Fujisawa, JP 241 2092
Watanabe, Takayuki Hiratsuka, JP 312 3265

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