US PATENT SUBCLASS 29 / 254
.~.~ Having percussion or explosive operator

Current as of: June, 1999
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29 /   HD   METAL WORKING

700  DF  MEANS TO ASSEMBLE OR DISASSEMBLE {55}
244  DF  .~ Puller or pusher means, contained force multiplying operator {11}
254.~.~ Having percussion or explosive operator {1}
255  DF  .~.~.~> Tube, sleeve, or ferrule inserting or removing

DEFINITION

Classification: 29/254

Having percussion or explosive operator:

(under subclass 244) Apparatus which are operated by percussion, including the explosion of a contained medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

252, for apparatus operated by sustained fluid pressure as distinguished from an explosion.

275, for an impact receiving tool not having contained impacting element.

427, for a process of separating parts (e.g., a broken drill stem from a drilled hole) utilizing percussion or explosion.

SEE OR SEARCH CLASS

60, Power Plants,

632+, for a one shot explosion actuated expansible chamber type motor. 81, Tools,

463+, and see the notes thereto for other impact operated apparatus.

173, Tool Driving or Impacting,

90+, for a tool impacting device, per se, of general utility.

175, Boring or Penetrating the Earth,

2+, for subject matter relating to a device for penetrating

the earth by means of a bullet or shaped charge which is fired in an inaccessible hole and including such a device for forming a perforation in a casing or other wall member in the hole.