US PATENT SUBCLASS 123 / 41.75
.~.~ Reentrant head

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

41.01  DF  COOLING {27}
41.72  DF  .~ With jacketed head and/or cylinder {8}
41.75.~.~ Reentrant head

DEFINITION

Classification: 123/41.75

(under subclass 41.72) Subject matter in which the cooling head is formed with an internal concave portion with which the jacket is coextensive.

(1) Note. This concave portion usually constitutes the combustion space.