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US 2005/0089417 A1Published application
Positive displacement pump
AssigneeThar Technologies, Inc.
InventorsLalit Chordia, John Davis
Life of this patent
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Abstract
The present invention provides a novel method of actuation for valve-less positive displacement reciprocating pumps. It also allows for variation of pumping volume by altering the speed of the motor, typically by adjusting the voltage. Use of the valve-less piston allows for compact design and it simplifies the construction, thereby ensuring reliable service.
Claims8
A positive displacement piston pump in which said piston moves axially while rotating on the same axis as a motor shaft.
Dependencies are inferred from the claim text.