US PATENT SUBCLASS 422 / 113
.~.~ Pressure-relief valve (e.g., pop-off valve) or check valve

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

105  DF  CONTROL ELEMENT RESPONSIVE TO A SENSED OPERATING CONDITION {6}
112  DF  .~ Control element is fluid pressure sensitive {1}
113.~.~ Pressure-relief valve (e.g., pop-off valve) or check valve

DEFINITION

Classification: 422/113

Pressure-relief valve (e.g., pop-off valve) or check valve:

(under subclass 112) Apparatus wherein the fluid pressure sensitive control element is a pressure-relief valve; i.e.,

pop-off valve, or check valve.