US PATENT SUBCLASS 137 / 596.13
.~.~.~ Controlled by supply or exhaust valve

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

561 R  DF  SYSTEMS {32}
596  DF  .~ Supply and exhaust {4}
596.12  DF  .~.~ With bypass {1}
596.13.~.~.~ Controlled by supply or exhaust valve

DEFINITION

Classification: 137/596.13

(under subclass 596.12) Device wherein the supply and exhaust valve controls the fluid flow to or through the by-pass valve.