US PATENT SUBCLASS 137 / 465
.~.~.~ With mechanical stop against reopening

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

455  DF  LINE CONDITION CHANGE RESPONSIVE VALVES {11}
456  DF  .~ Safety cut-off requiring reset {7}
464  DF  .~.~ Fluid counter-biased or unseated valve {2}
465.~.~.~ With mechanical stop against reopening

DEFINITION

Classification: 137/465

(under subclass 464) Apparatus including a mechanical means which prevents the valve from reopening after seating or

closing in the event the fluid pressure is reestablished.

(1) Note. In the valves classified herein the resetting operation must include the removal of the mechanical means from the stop position.

(2) Note. Magnetic detent is included herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

522+, for direct response valves with external means for opposing the bias.

SEE OR SEARCH CLASS 251, Valves and Valve Actuation,

89+, for means for blocking or disabling an actuator for a valve which is not condition responsive.