US PATENT SUBCLASS 218 / 54
.~.~.~ With throat region

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}
53  DF  .~.~ With nozzle {1}
54.~.~.~ With throat region

DEFINITION

Classification: 218/54

With throat region:

(under subclass 53) Subject matter wherein the nozzle has a narrow constricted passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

64, for puffer piston circuit interrupter.

73, for sealed chamber interrupter.