US PATENT SUBCLASS 123 / 657
COMBUSTION CHAMBER

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

657COMBUSTION CHAMBER {11}
658  DF  .~> L- or T-shaped
659  DF  .~> Having groove to aid combustion
660  DF  .~> An acoustic cavity used to attenuate detonation shock waves (e.g., Bodine)
661  DF  .~> Having squish area
662  DF  .~> Multiple annular combustion chambers
663  DF  .~> Annular combustion chamber
664  DF  .~> Combustion chamber shape is a figure of revolution {2}
667  DF  .~> Asymmetric combustion chamber
668  DF  .~> Having coating or liner {1}
670  DF  .~> Having catalytic cambustion aid
671  DF  .~> Cylinder head shape conforms to piston shape

DEFINITION

Classification: 123/657

COMBUSTION CHAMBER:

(under the class definition) Subject matter wherein significance is attributed to the form, construction, or other feature of the volume enclosed by the engine cylinder head, piston bore, and the top of the piston when ignition of the combustible mixture takes place or when the piston is at top dead center.

(1) Note. Includes relation of engine parts such as intake, exhaust, or igniting device to the combustion chamber.

SEE OR SEARCH THIS CLASS, SUBCLASS:

48, for a combustion chamber with means to vary the volume thereof.

SEE OR SEARCH CLASS

60, Power Plants,

39.6+, for external combustion engines including a combustion chamber separated from the working cylinder by a transfer valve or equivalent means, communication between the combustion chamber and working cylinder being established subsequent to ignition with the combustion chamber.