US PATENT SUBCLASS 318 / 482
.~ Level of fluid or granular material

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

445  DF  AUTOMATIC AND/OR WITH TIME-DELAY MEANS (E.G., AUTOMATIC STARTING AND/OR STOPPING) {20}
482.~ Level of fluid or granular material

DEFINITION

Classification: 318/482

(under subclass 445) Subject matter in which the sensing means is responsive to the level of (1) a fluid material or medium (i.e., a gaseous or a liquid material or medium) or (2) a granular (i.e., particulate or discrete particles) material or medium (e.g., sand, grain, shot, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

481, and the subclasses specified in the notes thereto, for motor systems having automatic control of the motor in response to the pressure in a fluid or granular material or medium.

SEE OR SEARCH CLASS

417, Pumps,

36, for a float controlled motor driving a pump.