US PATENT SUBCLASS 123 / 190.13
.~.~.~ With lubrication means


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

188.1  DF  VALVE {10}
190.1  DF  .~ Rotary {7}
190.12  DF  .~.~ Sleeve {1}
190.13.~.~.~ With lubrication means


DEFINITION

Classification: 123/190.13

With lubrication means:

(under subclass 190.12) Apparatus having a means to reduce the friction of the valve.