Hydraulic drive system of construction machine

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11274417
APP PUB NO 20200277755A1
SERIAL NO

16647840

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Importance

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Abstract

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A hydraulic drive system of a construction machine includes: a boom control valve connected to a boom cylinder by a boom raising supply line and a boom lowering supply line; a pump that sucks hydraulic oil through a suction line, and delivers the hydraulic oil through a delivery line; a regenerative valve that brings the boom raising supply line and the suction line into communication with each other through a regenerative line when a boom lowering operation is performed; and a controller that controls an accumulator switching valve. The controller: switches the accumulator switching valve to a pressure accumulation position when a pressure accumulation condition is satisfied; switches the accumulator switching valve to a pressure release position when a pressure release condition is satisfied; and switches the accumulator switching valve to a neutral position when neither the pressure accumulation condition nor the pressure release condition is satisfied.

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Patent Owner(s)

Patent OwnerAddress
KAWASAKI JUKOGYO KABUSHIKI KAISHA1-1 HIGASHIKAWASAKI-CHO 3-CHOME CHUO-KU KOBE-SHI HYOGO 6508670 ?6508670

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kato, Takehisa Kobe, JP 35 810
Kondo, Akihiro Kobe, JP 196 720
Yudate, Yoji Kobe, JP 11 68

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