US PATENT SUBCLASS 218 / 64
.~.~.~.~ 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}
57  DF  .~.~ Puffer piston {6}
63  DF  .~.~.~ With nozzle {1}
64.~.~.~.~ With throat region

DEFINITION

Classification: 218/64

With throat region:

(under subclass 63) Subject matter wherein the nozzle has a narrow passage.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54, for air-current blowout interrupter.

73, for sealed chamber interrupter.