US PATENT SUBCLASS 218 / 52
.~.~.~ Exhaust port

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}
51  DF  .~.~ With gas flow means {1}
52.~.~.~ Exhaust port

DEFINITION

Classification: 218/52

Exhaust port:

(under subclass 51) Subject matter wherein the confined channel has an orifice to direct the gas onto the arc to extinguish the arc.