US PATENT SUBCLASS 123 / 184.53
.~ Manifold tuning, balancing or pressure regulating means

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

184.21  DF  INTAKE MANIFOLD {8}
184.53.~ Manifold tuning, balancing or pressure regulating means {6}
184.54  DF  .~.~> With back flow prevention valve
184.55  DF  .~.~> Adjustable length passage
184.56  DF  .~.~> Adjustable cross section passage
184.57  DF  .~.~> Resonator chamber
184.58  DF  .~.~> Return loop to inlet
184.59  DF  .~.~> Interconnection between passages

DEFINITION

Classification: 123/184.53

Manifold tuning, balancing, or pressure regulating means:

(under subclass 184.21) Intake manifold including means to: (a) select the resonant frequency of the chamber for desired flow of the working fluid; (b) optimally vary the passage to one cylinder with respect to another; (c) control the pressure of the working fluid therein.