US PATENT SUBCLASS 123 / 321
.~.~ Valve timing altering means (e.g., axially sliding cam shaft)

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

319  DF  ENGINE SPEED REGULATOR {16}
320  DF  .~ Responsive to deceleration mode (e.g., engine acting as a brake) {7}
321.~.~ Valve timing altering means (e.g., axially sliding cam shaft) {1}
322  DF  .~.~.~> Electrical means adapted to alter valve timing

DEFINITION

Classification: 123/321

Valve timing altering means (e.g., axially sliding cam shift):

(under subclass 320) Subject matter in which a device is provided to alter the instant at which opening or closing of an engine valve begins, to cause the engine to act as a brake.