US PATENT SUBCLASS 417 / 463
.~.~.~ Having second cylinder unitary with piston of first

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


417 /   HD   PUMPS

437  DF  EXPANSIBLE CHAMBER TYPE {40}
460  DF  .~ Moving cylinder {7}
462  DF  .~.~ Unidirectionally rotating cylinder {1}
463.~.~.~ Having second cylinder unitary with piston of first

DEFINITION

Classification: 417/463

(under subclass 462) Apparatus in which the relatively reciprocating piston has a second pumping chamber formed integral therewith, said second pumping chamber being provided with a relatively reciprocating piston.