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US Patent 10434532 Three piece pump

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Patent attributes

Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Zhenchun Shi0

Andrew Jones0

Heiner Ophardt0

Date of Patent

October 8, 2019

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Patent Application Number

154586300

Date Filed

March 14, 2017

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Patent Citations Received

US Patent 11471905 All plastic airless pump dispenser

US Patent D991785 Lotion pump actuator

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US Patent 11389814 All plastic hand pump with a piston having an integrated check valve

US Patent D1009628 Hand pump

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Patent Primary Examiner

Charles Cheyney

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Patent abstract

The present invention provides an improved pump assembly incorporating a liquid pump and an air pump and which pump includes a flexible annular diaphragm member coaxially about a piston-forming element forming a component with the liquid pump.

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