US PATENT SUBCLASS 137 / 493.9
.~.~ Axes of ports co-axial

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

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
493  DF  .~ Bi-directional flow valves {4}
493.9.~.~ Axes of ports co-axial

DEFINITION

Classification: 137/493.9

(under subclass 493) Apparatus wherein the axis of one valve port is co-axial with that of the second valve port.

SEE OR SEARCH THIS CLASS, SUBCLASS:

493.1, for coaxial ports where one valve assembly is carried by the head of another.