US PATENT SUBCLASS 417 / 410.4
.~.~.~ Interengaging rotary pumping members

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

321  DF  MOTOR DRIVEN {32}
410.1  DF  .~ Electric or magnetic motor {10}
410.3  DF  .~.~ Rotary expansible chamber pump {2}
410.4.~.~.~ Interengaging rotary pumping members

DEFINITION

Classification: 417/410.4

Interengaging rotary pumping members:

(under subclass 410.3) Apparatus wherein a plurality of pumping members rotating about fixed axes have surface portions disposed to maintain a line contact therebetween against which pressure fluid reacts to thereby form a boundary of the enclosed space.

(1) Note. Interengaging rotary members include gears, helical screws, gerotors, etc.