US PATENT SUBCLASS 83 / 178
BY TOOL INSIDE HOLLOW WORK

Current as of: June, 1999
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83 /   HD   CUTTING

178BY TOOL INSIDE HOLLOW WORK {9}
179  DF  .~> Work pre-packed with internal tool(s)
180  DF  .~> With expanding mandrel
181  DF  .~> Interrelated tool feed means and means to actuate work immobilizer {1}
183  DF  .~> Synchronized tool and work feeding means
184  DF  .~> With means to position tool(s) for cutting
185  DF  .~> One tool (either internal or external) having compound motion {1}
187  DF  .~> One tool having unidirectional rotary motion
188  DF  .~> One tool having only rectilinear motion(s) {3}
195  DF  .~> With manually actuated means to position or facilitate positioning of work

DEFINITION

Classification: 83/178

(under the class definition) Means in which a tool is disposed within a generally tubular portion of a workpiece and, either alone or in cooperation with another tool, operates on the internal surface of the piece.

(1) Note. The "generally tubular portion" comprises a wall which presents, in transverse cross-section, a substantially closed perimeter.

(2) Note. The internal tool must be in position within the hollow work at initiation of cutting.

(3) Note. Patents disclosing a tool oscillating about a fixed center during the cutting stroke and its retraction therefrom will be found in this subclass. Patents disclosing other tool motions will be found in subclasses indented hereunder.

SEE OR SEARCH THIS CLASS, SUBCLASS:

196+, for cutting work (which may be hollow) by the misalignment of aligned apertures.

315+, and 597+, for an oscillating tool which does not cut from within a hollow workpiece. SEE OR SEARCH CLASS

82, Turning,

82, for a turning device of the severing or cutoff type wherein the tool, or tools, lies within the work.

166, Wells,

55+, for apparatus for cutting a well conduit in situ and subclasses 297+ for processes of cutting a well conduit in

situ.

175, Boring or Penetrating the Earth,

2+, for subject matter relating to a device for firing a bullet or exploding a shaped charge within an inaccessible bore to penetrate the earth formation or perforate or cut a casing or other wall member in the bore.