US PATENT SUBCLASS 123 / 184.59
.~.~ Interconnection between passages


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123 /   HD   INTERNAL-COMBUSTION ENGINES

184.21  DF  INTAKE MANIFOLD {8}
184.53  DF  .~ Manifold tuning, balancing or pressure regulating means {6}
184.59.~.~ Interconnection between passages


DEFINITION

Classification: 123/184.59

Interconnection between passages:

(under subclass 184.53) Intake manifold wherein the inlet passages communicate with one another allowing working fluid to pass there between.