US PATENT SUBCLASS 417 / 449
.~.~ Removable unit having piston normally fixed in conduit

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
448  DF  .~ Pump mounted in vertical tubular flow conduit removable as unit by driving rod manipulation {2}
449.~.~ Removable unit having piston normally fixed in conduit

DEFINITION

Classification: 417/449

(under subclass 448) Apparatus in which the pump is provided with a piston which is fixed with respect to the pipe or tube and is stationary during operation of the pump, but is so mounted as to be removed with the pump unit.