US PATENT SUBCLASS 123 / 659
.~ Having groove to aid combustion

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

657  DF  COMBUSTION CHAMBER {11}
659.~ Having groove to aid combustion

DEFINITION

Classification: 123/659

Having groove to aid combustion:

(under subclass 657) Subject matter in which at least one groove is provided on part or all of the surface of the combustion chamber.

(1) Note. The groove may be provided on the top, or the crown, or the piston.