Liquid feed pump and liquid chromatograph

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9689384
SERIAL NO

14349945

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A recess into which a protrusion of a plunger seal is to be fitted is provided at a part of a pump head where a plunger is to be inserted into a pump chamber. The plunger seal seals the pump chamber by an outer circumferential surface of the protrusion coming into close contact with an inner circumferential surface of the recess and a surface of a flange on the side of the protrusion coming into close contact with a circumferential edge surface of the recess of the pump head due to the protrusion being fitted into the recess and being pressed by a backup ring toward the pump chamber. The inner circumferential surface of the recess of the pump head and the circumferential edge surface of the recess are covered by a film of an acid-resistant material.

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Patent Owner(s)

  • SHIMADZU CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imamura, Shinya Kyoto, JP 107 565
Maeda, Yoshiaki Kyoto, JP 52 400

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