US PATENT SUBCLASS 417 / 423.9
.~.~.~ Having means to prevent debris from entering 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  DF  .~.~ Rotary motor and rotary nonexpansible chamber pump {13}
423.9.~.~.~ Having means to prevent debris from entering pump

DEFINITION

Classification: 417/423.9

(under subclass 423.1) Apparatus wherein means are provided to block the entrance of foreign matter to the pump chamber or means to separate foreign material from the pumped fluid.