US PATENT SUBCLASS 175 / 327
BIT OR BIT ELEMENT

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

327BIT OR BIT ELEMENT {21}
331  DF  .~> Rolling cutter bit or rolling cutter bit element {26}
379  DF  .~> Cutting edge self-renewable during operation
380  DF  .~> Unsupported abrading particle type (e.g., shot)
381  DF  .~> Cutting edges relatively longitudinally movable during operation
382  DF  .~> Adjustable cutter element {2}
385  DF  .~> Bit with leading portion (e.g., pilot) forming smaller diameter initial bore {6}
393  DF  .~> With fluid conduit lining or element (e.g., slush tube)
394  DF  .~> With helical-conveying portion {1}
396  DF  .~> Axially parallel side wall with transverse cuttings retaining portion
397  DF  .~> Forked rotary nontracking
398  DF  .~> Nonsymmetrical bit {2}
401  DF  .~> Cutting edges facing in opposite axial directions
402  DF  .~> Casing shoe type
403  DF  .~> Core forming type {3}
406  DF  .~> Noncutting portion forwardly of cutting portion (e.g., reamer) {1}
408  DF  .~> With bit guide or bore wall compacting device
412  DF  .~> Plural separable cutter elements {1}
414  DF  .~> Impact or percussion type {5}
421  DF  .~> Symmetrical forked rotary type (e.g., fishtail)
328  DF  .~> Magnetized or with magnet
425  DF  .~> Specific or diverse material {3}

DEFINITION

Classification: 175/327

(under the class definition) Apparatus comprising (1) a tool having a cutter element or cutting edge which is disclosed as specifically adapted to mechanically contact and selectively cut, disintegrate or dislocate portions of masonry, stone, rock or earth formations to form or enlarge a hole or bore therein or (2) subcombinations of such a tool not otherwise classified.

(1) Note. Cutter element is defined as any portion of a bit that comprises a cutting edge and a body portion that is specifically formed to be movably or immovably engaged or connected to a supporting structure (i.e., bit head) which supporting structure by itself has no disintegrating function but serves as an intermediate member for connecting the cutter element to a drive shaft.

(2) Note. Cutting edge is defined as that portion of the cutter element or bit that initially contacts and cuts, disintegrates or dislocates the earth formation, said edge may be composed of a surface which is usually sharpened or chisel shaped; however, any projection or surface the sole purpose of which is to cut disintegrate or dislocate the formation which it contacts is included under the term cutting edge.

SEE OR SEARCH CLASS

30, Cutlery, appropriate subclasses for cutlery of general utility.

37, Excavating, appropriate subclasses, particularly 446+, for digging edge of scoops.

51, Abrasive Tool Making Process, Material, or Composition, for an abrasive tool making process, material, or composition in general.

52, Static Structures (e.g., Buildings),

155+, for a piercing or expanding earth anchor.

76, Metal Tools and Implements, Making,

102, and 108.1+ for blanks and processes for making drills.

111, Planting,

99, for dibbles for planting.

125, Stone Working,

36+, for stone working tools including drills adapted to bore a hole in stone not in situ.

144, Woodworking, for a woodworking machine including cutting edges.

172, Earth Working, 681+, and the search there noted for earth working tools.

241, Solid Material Comminution or Disintegration, appropriate subclasses, and particularly

291+, for apparatus for breaking up solid material.

299, Mining or In Situ Disintegration of Hard Material,

79.1, for a cutter head or tooth for mining or disintegrating hard material in situ.

407, Cutters, for Shaping, for a metal working cutter.

408, Cutting by Use of Rotating Axially Moving Tool,

186+, and 199+ for a tool of that class type.

433, Dentistry,

165, for dental tool bits.

451, Abrading, for an abrading tool of general utility, and particularly 490+, for a tool support for a flexible-member abrading tool, subclasses 526+ for a flexible-member abrading tool, per se, and subclasses 540+ for a rigid abrading tool.

606, Surgery,

80+, for bone drills and subclasses 167+, for cutting, puncturing or piercing tools in general.