222 / | HD | DISPENSING |
251 | DF | WITH DISCHARGE ASSISTANT (E.G., IMPELLER, PUMP, CONVEYER, MOVABLE TRAP CHAMBER, ETC.) {30} |
336 | DF | .~ With biasing means for discharge assistant and/or its casing {3} |
340 | .~.~ For reciprocating piston on follower-type impeller {1} | |
341 | DF | .~.~.~> Biasing means within material chamber or passage |