US PATENT SUBCLASS 175 / 359
.~.~.~.~ With bearing or seal details

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

327  DF  BIT OR BIT ELEMENT {21}
331  DF  .~ Rolling cutter bit or rolling cutter bit element {26}
355  DF  .~.~ Circumferentially displaced cutter axes {3}
358  DF  .~.~.~ Mutually contacting cutter supports {1}
359.~.~.~.~ With bearing or seal details

DEFINITION

Classification: 175/359

(under subclass 358) Apparatus provided with a specific bearing or seal structure.

(1) Note. Since nearly all rolling cutter elements employ some form of bearing, nominally recited bearing structures as defined in (1) Note to subclass 371, have been excluded and the patent has been classified on the basis of the remaining features.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371+, for bearings and seals in other combinations with cutter structure and see the notes thereunder.

SEE OR SEARCH CLASS

277, Seal for a Joint or Juncture, for a generic sealing means or process,

358+, for a relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.) or subclasses 500+ or a dynamic circumferential contact seal for other than a piston.