Work machine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12049744
APP PUB NO 20240068203A1
SERIAL NO

18272121

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A work machine includes a hydraulic pump that is driven by an engine and delivers a pressurized fluid, a hydraulic actuator that is operated by the pressurized fluid delivered by the hydraulic pump, a hydraulic accumulator device that accumulates the pressurized fluid discharged from the hydraulic actuator, a differential pressure control valve that is disposed between the hydraulic actuator and the hydraulic accumulator device and generates a differential pressure across the differential pressure control valve between a pressure of the hydraulic actuator and a pressure of the hydraulic accumulator device, a pressure sensor that senses the pressure of the hydraulic accumulator device, and a controller that controls the differential pressure control valve on the basis of a sensing result of the pressure sensor. The controller controls the differential pressure control valve in such a manner that the differential pressure across the differential pressure control valve reduces according to a rise in the pressure of the hydraulic accumulator device sensed by the pressure sensor.

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Patent Owner(s)

Patent OwnerAddress
HITACHI CONSTRUCTION MACHINERY CO LTDTOKYO 110-0015

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hijikata, Seiji Tsukuba, JP 44 184
Hoshino, Masatoshi Tsuchiura, JP 77 1221
Tsuruga, Yasutaka Ryugasaki, JP 68 327
Yagisawa, Ryou Tsuchiura, JP 5 0

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