US PATENT SUBCLASS 335 / 292
.~.~.~.~ Hermetically sealed or moisture-proofed

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

209  DF  MAGNETS AND ELECTROMAGNETS {10}
285  DF  .~ Work or object holding type {4}
289  DF  .~.~ Electromagnet type (e.g., electromagnetic chuck) {2}
291  DF  .~.~.~ Lifting or attracting type (e.g., for lifting pigiron or pulling hairpins) {3}
292.~.~.~.~ Hermetically sealed or moisture-proofed

DEFINITION

Classification: 335/292

(under subclass 291) Subject matter wherein the lifting or pulling type electromagnet is hermetically sealed to keep moisture, dust or other foreign particles from the magnet elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151+, for vacuum or hermetically sealed type switches.

162, for plural switches with unitary housing.

202, for switches with housing or support means.

260, for hermetically sealed electromagnet with plunger type armature.

278, for electromagnet with sealed casing or enclosure. 294, for lifting or holding electromagnet with outer casing or housing.

SEE OR SEARCH CLASS

174, Electricity: Conductors and Insulators,

17+, for boxes and housings with fluid or vacuum and subclasses 50.5+ for hermetic sealed envelope type boxes and housings for electrical devices.

336, Inductor Devices,

90+, for inductor with outer casing or housing.