US PATENT SUBCLASS 137 / 543.15
.~.~.~.~.~ Head slides on guide-rod concentric with spring

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

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
511  DF  .~ Direct response valves (i.e., check valve type) {14}
528  DF  .~.~ Reciprocating valves {5}
535  DF  .~.~.~ Spring biased {5}
540  DF  .~.~.~.~ Spring coaxial with valve {9}
543.15.~.~.~.~.~ Head slides on guide-rod concentric with spring

DEFINITION

Classification: 137/543.15

(under subclass 540) Valves wherein the head slides on a guide-rod which is concentric with the spring.