US PATENT SUBCLASS 417 / 220
.~.~.~ Rotary expansible chamber pump

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

212  DF  CONDITION RESPONSIVE CONTROL OF DRIVE TRANSMISSION OR PUMP DISPLACEMENT {7}
218  DF  .~ Adjustable cam or linkage {3}
219  DF  .~.~ Radially adjustable stator {1}
220.~.~.~ Rotary expansible chamber pump

DEFINITION

Classification: 417/220

(under subclass 219) Apparatus in which the pump is a rotary pump of the expansible chamber type.

SEE OR SEARCH CLASS

418, Rotary Expansible Chamber Devices,

24+, for rotary expansible chamber motors or pumps in which the capacity is varied by a movable member (e.g., stator, etc.), the member being moved by the direct application of

working fluid thereto, there being no condition responsive valving controlling the application or release of fluid to or from the member.