US PATENT SUBCLASS 406 / 19
.~.~ Responsive to presence or absence or quantity of load

Current as of: June, 1999
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406 /   HD   CONVEYORS: FLUID CURRENT

10  DF  WITH MEANS TO CONTROL CONVEYING FLUID OR MOVEMENT OF LOAD IN RESPONSE TO SENSED CONDITION {3}
12  DF  .~ Control of conveying fluid {4}
19.~.~ Responsive to presence or absence or quantity of load {4}
20  DF  .~.~.~> With stepped reset for each load article introduced at intake
21  DF  .~.~.~> With load detector at outlet to terminate fluid current
22  DF  .~.~.~> With timer to terminate current
23  DF  .~.~.~> Level or weight of load in receptacle {1}

DEFINITION

Classification: 406/19

Responsive to presence or absence or quantity of load:

(under subclass 12) Subject matter wherein the controller which regulates the flow or pressure of the conveying fluid is regulated by a sensor which detects either the amount of

the load or whether or not the load is at a particular location.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14+, for devices wherein the presence or absence of the load is determined by a pressure sensor.