Internal gear pump and internal gear motor

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12234823
APP PUB NO 20240280098A1
SERIAL NO

18569804

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An internal gear pump includes: an internal gear rotatably fitted in a body; an external gear inscribed in and meshed with the internal gear; a filler piece that partitions a liquid feeding space formed between the internal gear and the external gear into a high pressure region and a low pressure region; and a sealing member that covers both end surfaces of both the gears in a rotation axis direction and seals the liquid feeding space, in which a communication groove for communicating an enclosed space surrounded by the filler piece and a tooth groove of at least one of the gears with the high pressure region is formed, and the communication groove is formed such that a cross-sectional area communicating with the enclosed space continuously increases and an increase rate thereof acceleratively increases as a rotation phase of both the gears advances.

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Patent Owner(s)

  • SHIMADZU CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kokabu, Takuya Kyoto, JP 3 0
Osamura, Koichi Kyoto, JP 1 0

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