US PATENT SUBCLASS 137 / 630.14
.~.~.~.~ First valve moves second valve

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
630.14.~.~.~.~ First valve moves second valve

DEFINITION

Classification: 137/630.14

(under subclass 630) Systems in which a structure rigidly connected to a first opened valve head engages structure rigidly connected to a second valve head so that continued motion of the first valve operator subsequently causes the second valve head to be positively opened.