US PATENT SUBCLASS 164 / 317
.~.~.~.~.~ Piston contains injection conduit

Current as of: June, 1999
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164 /   HD   METAL FOUNDING

271  DF  MEANS TO SHAPE METALLIC MATERIAL {12}
284  DF  .~ Pressure shaping means {5}
303  DF  .~.~ Injection type {4}
312  DF  .~.~.~ Piston-cylinder charger {3}
316  DF  .~.~.~.~ Hot chamber type {2}
317.~.~.~.~.~ Piston contains injection conduit

DEFINITION

Classification: 164/317

(under subclass 316) Apparatus wherein the pressure piston has an opening through which to convey pressurized metal

towards the mold.