US PATENT SUBCLASS 123 / 90.66
.~.~ Attenuated

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

90.1  DF  POPPET VALVE OPERATING MECHANISM {19}
90.65  DF  .~ Spring {2}
90.66.~.~ Attenuated

DEFINITION

Classification: 123/90.66

(under subclass 90.65) Device wherein means is provided to dampen or otherwise regulate the rate at which the spring element imparts to the valve the potential energy that it received through the operation of the valve mechanism.