External gear pump

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11732711
APP PUB NO 20210355939A1
SERIAL NO

17443856

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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In an external gear pump, a first bushing of a rotational shaft of a first gear has a second surface facing to a first surface of a pump body. A recess for supplying high-pressure lubricating oil between an inner circumferential surface of the first bushing and an outer circumferential surface of the rotational shaft is opened on the inner circumferential surface within a low pressure range associating with an inlet chamber of fluid. A bushing-side supply passage for supplying the high-pressure lubricating oil to the recess is formed within the first bushing. A bushing-side inlet port of the bushing-side supply passage is opened on the second surface within a high pressure range associating with an outlet chamber of the fluid. A body-side supply passage for supplying the high-pressure lubricating oil to a body-side supply port opened on the first surface is formed within the pump body.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
IHI CORPORATIONTOKYO 135-8710

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sato, Takashi Tokyo, JP 973 9680
Seki, Naoki Tokyo, JP 34 335
Shimamura, Akihiro Tokyo, JP 4 6
Takamiya, Kenji Tokyo, JP 5 3
Tanida, Masahiro Tokyo, JP 10 109

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