US PATENT SUBCLASS 405 / 161
.~.~.~ Entrenching or burying apparatus guided by pre-positioned pipe or cable

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}
158  DF  .~ Submerging, raising, or manipulating line of pipe or cable in or from marine environment {7}
159  DF  .~.~ Entrenched or buried {3}
161.~.~.~ Entrenching or burying apparatus guided by pre-positioned pipe or cable {2}
162  DF  .~.~.~.~> With apparatus buoyancy control
163  DF  .~.~.~.~> With bottom fluidizing means

DEFINITION

Classification: 405/161

Entrenching or burying apparatus guided by pre-positioned pipe or cable:

(under subclass 159) Method or apparatus wherein the string or conduit is initially positioned on and along the bottom of the body of water, and is subsequently positioned beneath the bottom by a device having means to engage the string or conduit and guide the device along the same.