US PATENT SUBCLASS 141 / 25
.~.~ Expansible chamber of fluid pressure applying or controlling means

Current as of: June, 1999
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141 /   HD   FLUENT MATERIAL HANDLING, WITH RECEIVER OR RECEIVER COACTING MEANS

18  DF  FILLING OR REFILLING OF DISPENSERS {5}
21  DF  .~ By operation of means causing or controlling dispensing {2}
25.~.~ Expansible chamber of fluid pressure applying or controlling means {3}
26  DF  .~.~.~> Dispenser carried expansible chamber pump
27  DF  .~.~.~> Container with follower
28  DF  .~.~.~> Container mounted jet pump

DEFINITION

Classification: 141/25

(under subclass 21) Devices in which the means causing or controlling dispensing comprises a volumetric change affecting means or comprises some nonsolid means for exerting a force upon the materials to be dispensed.