Construction machine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 12043983
APP PUB NO 20230105014A1
SERIAL NO

17908040

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An object of the present invention is to provide a construction machine that can use the return oil from a hydraulic actuator effectively. For this purpose, a controller computes a flow rate of the return oil from a first hydraulic actuator on the basis of an operation signal from a first operation device, computes a flow rate of oil to be supplied to a second hydraulic actuator on the basis of an operation signal from a second operation device, sets smaller one of the flow rate of the return oil and the flow rate of the oil to be supplied, as a regeneration flow rate that is a flow rate of oil to be regenerated in the second hydraulic actuator, sets a flow rate obtained by subtracting the regeneration flow rate from the flow rate of the return oil, as a recovery flow rate that is a flow rate of oil to be recovered to a pressure accumulating device, adjusts an opening degree of a first control valve 2 such that a flow rate of oil supplied from the first hydraulic actuator to the pressure accumulating device coincides with the recovery flow rate, and adjusts an opening degree of a second control valve such that a flow rate of oil supplied from the first hydraulic actuator to the second hydraulic actuator coincides with the regeneration flow rate.

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First Claim

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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
Hiraku, Kenji Kasumigaura, JP 60 526
Hoshino, Masatoshi Tsuchiura, JP 77 1221
Tsuruga, Yasutaka Ryugasaki, JP 68 327

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