Valve plate, cylinder block, and hydraulic pump/motor

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12188459
APP PUB NO 20230304481A1
SERIAL NO

18018655

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A valve plate of a hydraulic pump/motor, includes a high pressure-side port and a low pressure-side port, a first oil groove provided to be endless in an outer peripheral part of the high and low pressure-side ports, and a plurality of second oil grooves. Further, a plurality of pad oil grooves communicating with the first oil groove and opened toward the end face of the cylinder block is provided in an outer peripheral portion of the high pressure-side port, at least in a portion being on a downstream side of the relative rotation, in a pad region contacting the end face of the cylinder block, and the plurality of pad oil grooves is provided such that a proportion of an opening area to the end face of the cylinder block is larger on the downstream side than on an upstream side of the relative rotation.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
KOMATSU LTDTOKYO

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ikeda, Mitsutaka Tokyo, JP 9 194
Motoshima, Hiroaki Tokyo, JP 9 9

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