US PATENT SUBCLASS 123 / 266
.~ Precombustion chamber assembly inserted in spark plug hole

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

253  DF  PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES {22}
266.~ Precombustion chamber assembly inserted in spark plug hole {1}
267  DF  .~.~> Separate fuel or combustible mixture added to precombustion chamber

DEFINITION

Classification: 123/266

Precombustion chamber assembly inserted in spark plug hole:

(under subclass 253) Subject matter in which the prechamber is attached to the engine by insertion into the hole provided for the spark plug.

(1) Note. This type of prechamber is usually used as a retrofit device on an engine not normally having a prechamber. The displaced spark plug is usually screwed into a hole provided for in the prechamber assembly.

(2) Note. Prechamber usually screws in.

SEE OR SEARCH THIS CLASS, SUBCLASS:

273, for other prechamber mounting means.