US PATENT SUBCLASS 310 / 88
.~.~.~.~ Dirt, moisture or explosion proof

Current as of: June, 1999
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310 /   HD   ELECTRICAL GENERATOR OR MOTOR STRUCTURE

10  DF  DYNAMOELECTRIC {5}
40 R  DF  .~ Rotary {28}
66  DF  .~.~ With other elements {7}
85  DF  .~.~.~ Mechanical shields or protectors {4}
88.~.~.~.~ Dirt, moisture or explosion proof

DEFINITION

Classification: 310/88

(under subclass 85) Subject matter having means to render the device dirt, moisture or explosion proof.

(1) Note. A dynamoelectric device may be rendered explosion proof by filling all voids within the device in such manner that the passages are not sufficiently large to support a flame or explosion, because of the lose of energy from the flame or explosion by radiation to the surrounding mass of solid material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

87, for this subject matter when submersible.