US PATENT SUBCLASS 123 / 281
.~ Precombustion chamber shape is a figure of revolution

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

253  DF  PRECOMBUSTION AND MAIN COMBUSTION CHAMBERS IN SERIES {22}
281.~ Precombustion chamber shape is a figure of revolution {3}
282  DF  .~.~> Figure of revolution is multishaped to form a precombustion chamber
283  DF  .~.~> Cylindrical
284  DF  .~.~> Spherical

DEFINITION

Classification: 123/281

Precombustion chamber shape is a figure of revolution:

(under subclass 253) Subject matter wherein the three-dimensional shape of the precombustion chamber can be formed by rotating a single planar shape, formed from a combination of straight or curved lines, through 360 deg. about an axis.

(1) Note. Connecting throats are not considered as part of the figure of revolution.

(2) Note. An example would be to rotate a semicircle about a straight line connecting its free ends (diameter) thus forming a sphere.