US PATENT SUBCLASS 417 / 538
.~.~ Inlet and discharge distributors at adjacent end of aligned chambers

Current as of: June, 1999
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417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
521  DF  .~ Plural pumping chambers {7}
538.~.~ Inlet and discharge distributors at adjacent end of aligned chambers

DEFINITION

Classification: 417/538

(under subclass 521) Apparatus in which said pumping chambers are coaxial with each other with one end of one chamber secured to the end of a second chamber, and in which the valve means for controlling the inlet and discharge of said chambers is positioned adjacent the secured ends of said pumping chambers.