US PATENT SUBCLASS 123 / 188.15
.~.~ Shepherd type

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

188.1  DF  VALVE {10}
188.4  DF  .~ Reciprocating valve {3}
188.15.~.~ Shepherd type

DEFINITION

Classification: 123/188.15

Shepherd type:

(under subclass 188.4) Apparatus having two valve heads one on top of the other with concentric valve stems.