Hydraulic pump

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12152580
APP PUB NO 20230332594A1
SERIAL NO

18028853

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A hydraulic pump includes: a valve plate including a suction port and a delivery port; a valve cover to which the valve plate is mounted; and a cylinder block that slides on the valve plate. The valve cover includes a suction passage and a delivery passage. The valve cover includes: a first chamber that communicates with the delivery passage through a communication passage and functions as a Helmholtz resonator; and a second chamber that communicates with the delivery passage, or with the first chamber, through an introduction passage including a restrictor. In the valve cover and the valve plate, a supply passage extends from the second chamber to a bottom dead center-side sealing surface of the valve plate, the bottom dead center-side sealing surface being a surface located between the suction port and the delivery port. The supply passage includes a restrictor.

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First Claim

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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)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirano, Yasunori Kobe, JP 1 0
Hyodo, Yuya Kobe, JP 1 0
Makino, Yuta Kobe, JP 7 7
Miura, Hidetoshi Kobe, JP 24 201
Yoshida, Takeshi Kobe, JP 294 2318

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