US PATENT SUBCLASS 72 / 259
.~ By plural impellers operating into one extrusion chamber

Current as of: June, 1999
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72 /   HD   METAL DEFORMING

253.1  DF  BY EXTRUDING THROUGH ORIFICE {15}
259.~ By plural impellers operating into one extrusion chamber

DEFINITION

Classification: 72/259

By plural impellers operating into one extrusion chamber:

(under subclass 253.1) Method or means in which the squeezing means comprises a plurality of distinct force applying instrumentalities, (e.g., plungers) working cooperatively into a common work confining chamber for extrusion of material therefrom.