US PATENT SUBCLASS 137 / 630.15
.~.~.~.~ Actuator moves both valves

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

561 R  DF  SYSTEMS {32}
628  DF  .~ Sequentially progressive opening or closing of plural valves {4}
629  DF  .~.~ Pressure equalizing or auxiliary shunt flow {1}
630  DF  .~.~.~ One valve seats against other valve (e.g., concentric valves) {5}
630.15.~.~.~.~ Actuator moves both valves

DEFINITION

Classification: 137/630.15

(under subclass 630) Systems in which a continuous motion of the actuator causes the actuator to engage and open one valve and then to engage and open a second valve.