US PATENT SUBCLASS 388 / 929
.~ Fluid/granular material flow rate, pressure, or level

Current as of: June, 1999
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388 /   HD   ELECTRICITY: MOTOR CONTROL SYSTEMS

923  DF  SPECIFIC FEEDBACK CONDITION OR DEVICE {6}
929.~ Fluid/granular material flow rate, pressure, or level

DEFINITION

Classification: 388/929

Fluid/granular material flow rate, pressure, or level:

Art collection of systems in which the running speed of a motor is controlled in accordance with a feedback signal which is proportional to the flow rate, the pressure, or the level of a fluid or granular (i.e., particulate) material.