Screw pump

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7232297
APP PUB NO 20040258550A1
SERIAL NO

10839992

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A pump including at least three rotors each being provided with a generally helical screw thread, the rotors being mounted for rotation in a housing such that the screw threads of the rotors mesh and rotation of one rotor causes rotation of the other rotor, wherein the pitch of the threads is less than 1.6 times the outer diameter of the rotors or where one of the rotors has a larger outer diameter than the other rotors the outer diameter of the larger diameter rotor.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
BUHLER MOTOR GMBH90459 NÜRNBERG

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beaven, Robert William Bristol, GB 6 20
Werson, Michael John Eastleigh, GB 11 49

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