US PATENT SUBCLASS 417 / 24
.~.~.~ Speed sensor comprises auxiliary pump or electric generator

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

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
18  DF  .~ Single motor control element responsive to means sensing diverse conditions {4}
22  DF  .~.~ One condition is speed of pump {2}
24.~.~.~ Speed sensor comprises auxiliary pump or electric generator

DEFINITION

Classification: 417/24

(under subclass 22) Subject matter in which the means sensing the rate of speed at which the pump is driven comprises either a secondary pump or an electric generator which is mechanically driven by the pump drive motor for producing a fluid or electric signal, respectively, indicative of the rate of speed at which the pump is driven.