Construction machine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10633825
APP PUB NO 20190338494A1
SERIAL NO

16074132

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The construction machine includes: a work implement driven by a first hydraulic actuator and a second hydraulic actuator; a first directional control valve controlling a flow rate and a direction of a hydraulic fluid supplied to the first hydraulic actuator; a first speed-up directional control valve provided in a second pump line and controlling a flow rate and a direction of a hydraulic fluid supplied to the first hydraulic actuator; a second directional control valve controlling a flow rate and a direction of a hydraulic fluid supplied to the second hydraulic actuator; an excavation load sensor that detects an excavation load imposed on the work implement; and a first speed-up control section that drives the first speed-up directional control valve, and the first speed-up control section is configured to control a driving amount of the first speed-up directional control valve in response to the excavation load.

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First Claim

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Patent Owner(s)

  • HITACHI CONSTRUCTION MACHINERY CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Moriki, Hidekazu Tokyo, JP 62 256
Sakamoto, Hiroshi Tsuchiura, JP 350 4715
Tanaka, Hiroaki Tsuchiura, JP 501 5230
Tsuruga, Yasutaka Tsuchiura, JP 65 276

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