US PATENT SUBCLASS 218 / 116
.~.~.~ Puffer-piston

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}
89  DF  .~ Interposed non-conductor {3}
91  DF  .~.~ Liquid {14}
116.~.~.~ Puffer-piston

DEFINITION

Classification: 218/116

Puffer-piston:

(under subclass 91) Subject matter including a movable contact, at least one other contact, a relatively movable piston, and cylinder whereby the movement of the contact to the open position causes the relative movement of the piston and cylinder to create a high pressure region which forces the flow of liquid through the separating contacts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

57, for air-current blowout circuit interrupter.