US PATENT SUBCLASS 141 / 258
.~.~ Axially reciprocating discharge assistant

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

250  DF  WITH MEANS TO MOVE SUPPLY MEANS AND/OR RECEIVER TO, FROM OR DURING FLOW RELATION {14}
251  DF  .~ Relatively receding discharge assistant and receiver engaging means {6}
258.~.~ Axially reciprocating discharge assistant {4}
259  DF  .~.~.~> Rotatable reciprocating discharge assistant
260  DF  .~.~.~> Reciprocating filling tube type discharge assistant
261  DF  .~.~.~> With synchronized intermittent supply (e.g., check valve)
262  DF  .~.~.~> With receding receiver support

DEFINITION

Classification: 141/258

(under subclass 251) Apparatus having means for assisting the movement of contents material from a source to a receiver by an action which partakes of a recurring back and forth linear motion.

SEE OR SEARCH THIS CLASS, SUBCLASS:

71+, for compacting strokes of a member which may pass through the supply flow path, but not at a time when material is or could be present therein.