US PATENT SUBCLASS 164 / 313
.~.~.~.~ Opposed piston injector

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}
313.~.~.~.~ Opposed piston injector

DEFINITION

Classification: 164/313

(under subclass 312) Apparatus which include at least two pistons which have opposed pressure faces which act to inject the casting material.