US PATENT SUBCLASS 417 / 423.1
.~.~ Rotary motor and rotary nonexpansible chamber pump

Current as of: June, 1999
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417 /   HD   PUMPS

321  DF  MOTOR DRIVEN {32}
410.1  DF  .~ Electric or magnetic motor {10}
423.1.~.~ Rotary motor and rotary nonexpansible chamber pump {13}
423.2  DF  .~.~.~> Vacuum cleaner
423.3  DF  .~.~.~> Submersible type
423.4  DF  .~.~.~> Turbomolecular pump
423.5  DF  .~.~.~> Plural units
423.6  DF  .~.~.~> Having nonflexible means to transmit power between motor shaft and pump shaft
423.7  DF  .~.~.~> With specific motor details
423.8  DF  .~.~.~> Having additional means to remove heat from pump or motor
423.9  DF  .~.~.~> Having means to prevent debris from entering pump
423.15  DF  .~.~.~> Having means to mount pump and motor in working position
423.11  DF  .~.~.~> Having means to prevent fluid leaking between pump and motor
423.12  DF  .~.~.~> Having bearing {1}
423.14  DF  .~.~.~> With specific housing details
424.1  DF  .~.~.~> Supported for rotation on vertical axis {1}

DEFINITION

Classification: 417/423.1

Apparatus under subclasses 410.1+ in which the working members of both the pump and the motor perform their work by means of a unidirectional rotary motion; the pump working member acting to pump fluid by a centrifugal, centripetal or screw effect, i.e., not by positive displacement of the fluid by an expansible chamber effect.