US PATENT SUBCLASS 175 / 331
.~ Rolling cutter bit or rolling cutter bit element

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

327  DF  BIT OR BIT ELEMENT {21}
331.~ Rolling cutter bit or rolling cutter bit element {26}
332  DF  .~.~> Core forming-type bit {1}
334  DF  .~.~> Bit with leading cutter forming smaller diameter initial bore {1}
336  DF  .~.~> Rolling cutter bit with fixed cutter
337  DF  .~.~> With drilling fluid supply to bearing
338  DF  .~.~> With rotary or endless carrier
339  DF  .~.~> With drilling fluid conduit details {1}
341  DF  .~.~> Plural rolling cutters with intermeshing teeth
342  DF  .~.~> Adjustable cutter element
343  DF  .~.~> Wobbling cutter
344  DF  .~.~> Noncutting portion forwardly of rolling cutter (e.g., reamer) {1}
348  DF  .~.~> Longitudinal axis cutter {1}
350  DF  .~.~> Laterally offset cutter axis {2}
354  DF  .~.~> Axle rotatable with cutter
355  DF  .~.~> Circumferentially displaced cutter axes {3}
360  DF  .~.~> Cross axle with stub axle
361  DF  .~.~> Cross axle {3}
365  DF  .~.~> Outwardly directed stub axle
366  DF  .~.~> Separable support for stub axle
367  DF  .~.~> Detachable stub axle, bushing or bearing {1}
369  DF  .~.~> Stub axle cutter securing means {1}
371  DF  .~.~> With bearing or seal details {1}
373  DF  .~.~> Disk cutter
374  DF  .~.~> Specific or diverse material {1}
376  DF  .~.~> Nonsymmetrical bit (e.g., nontracking)
377  DF  .~.~> Spiral rib or tooth row
378  DF  .~.~> Irregular tooth cutter row

DEFINITION

Classification: 175/331

(under subclass 327) Apparatus comprising a rotary bit in which a cutter element or carrier for a fixed cutter is rotatably mounted thereon so that the cutter element or carrier may roll or tend to roll on a surface of the bore as the bit is rotated.

(1) Note. Patents have been classified in this and indented

subclasses which claim a portion of a bit which is specifically described as a roller cutter bit even though the roller cutter element is not claimed.

(2) Note. An endless flexible member mounted to roll about journals on the bit head in response to rotation of said head is considered a rolling cutter and is classified in this and indented subclasses.

(3) Note. The term "readily detachable" as employed in the notes to this and indented subclasses refers to constructions which may be disassembled by employing only conventional hand tools. Patents which claim that the various parts or subassemblies may be separated by a cutting torch and new components welded together, have not been treated as involving readily detachable components although some of these patents refer to such welded parts as being detachable.

SEE OR SEARCH CLASS

15, Brushing, Scrubbing, and General Cleaning, 104.13, for pipe cleaners having similar rollers.

172, Earth Working,

518+, for rolling, rotating or orbitally moving earthworking tools.

299, Mining or In Situ Disintegration of Hard Material,

86, for a cutter head for mining or disintegrating hard material having a rolling cutter.