US PATENT SUBCLASS 405 / 180
.~.~ Including trench forming plow with pipe or cable guide

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

154  DF  PIPE OR CABLE LAYING, RETRIEVING, OR UNDERWATER MANIPULATION {6}
174  DF  .~ By means advancing along terrain and guiding pipe or cable into subterranean position {6}
180.~.~ Including trench forming plow with pipe or cable guide {3}
181  DF  .~.~.~> With depth adjustment
182  DF  .~.~.~> With plow vibrating or oscillating means
183  DF  .~.~.~> Guide integral with or rigidly fixed to plow

DEFINITION

Classification: 405/180

Including trench forming plow with pipe or cable guide:

(under subclass 174) Method or apparatus wherein the means for placing the string or conduit below the surface includes a plowlike digging tool for forming a trench for receiving said string or conduit, and means integral with or attached to said tool for restricting lateral movement of the string or conduit as the same travels from a supply to its final position below the surface.

SEE OR SEARCH THIS CLASS, SUBCLASS:

164+, for underwater apparatus for entrenching a line of pipe or cable and including a plow with a pipe or cable guide.

SEE OR SEARCH CLASS

37, Excavating,

366+, for a ditching plow.

172, Earth Working, for earthworking plows.