US PATENT SUBCLASS 218 / 86
.~.~ Low pressure cut-off valve means

Current as of: June, 1999
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218 /   HD   HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES

1  DF  ARC PREVENTING OR EXTINGUISHING DEVICES {14}
43  DF  .~ Air-current blowout {18}
86.~.~ Low pressure cut-off valve means

DEFINITION

Classification: 218/86

Low pressure cut-off valve means:

(under subclass 43) Subject matter comprising a valve which shuts off according to the detection of pressure either below or above a few pounds in excess of the atmospheric pressure.