US PATENT SUBCLASS 123 / 90.53
.~.~.~ Self-operating

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

90.1  DF  POPPET VALVE OPERATING MECHANISM {19}
90.48  DF  .~ Tappet {4}
90.52  DF  .~.~ Lash adjustment {1}
90.53.~.~.~ Self-operating {2}
90.54  DF  .~.~.~.~> Screw
90.55  DF  .~.~.~.~> Hydraulic {4}

DEFINITION

Classification: 123/90.53

(under subclass 90.52) Device wherein the adjusting means of the tappet element functions on its own initiative in response to the presence of an incorrect amount of clearance (lash) in the operating mechanism.