US PATENT SUBCLASS 417 / 544
.~.~.~ Manually operated pump

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
540  DF  .~ Having pulsation dampening fluid receiving space {3}
543  DF  .~.~ Direct contact with confined compressible fluid {1}
544.~.~.~ Manually operated pump

DEFINITION

Classification: 417/544

(under subclass 543) Apparatus in which the space having confined compressible fluid is associated with a pump of the type which is manually operated, e.g., by a handle or treadle.