US PATENT SUBCLASS 166 / 55.8
.~.~.~ Tool moved radially by fluid pressure

Current as of: June, 1999
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166 /   HD   WELLS

55  DF  MEANS FOR PERFORATING, WEAKENING, BENDING OR SEPARATING PIPE AT AN UNPREPARED POINT {3}
55.6  DF  .~ Cutter rotates circumferentially of pipe {1}
55.7  DF  .~.~ Internal {1}
55.8.~.~.~ Tool moved radially by fluid pressure

DEFINITION

Classification: 166/55.8

(under subclass 55.7) Devices in which a gaseous or liquid medium under pressure is used to apply a radial force to the tool.

SEE OR SEARCH CLASS

175, Boring or Penetrating the Earth,

267+, and the search there noted, for laterally shiftable earth cutting elements or other elements movable by fluid pressure.