US PATENT SUBCLASS 303 / 117.1
.~.~ Spool valve

Current as of: June, 1999
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303 /   HD   FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS

121  DF  SPEED-CONTROLLED {44}
113.1  DF  .~ Having a valve system responsive to a wheel lock signal {12}
117.1.~.~ Spool valve

DEFINITION

Classification: 303/117.1

Spool valve:

(under subclass 113.1) Apparatus wherein the fluid pressure regulator is a sliding rod with a series of fixed pistons that open or close fluid paths.