US PATENT SUBCLASS 405 / 163
.~.~.~.~ With bottom fluidizing means

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  DF  .~.~.~ Entrenching or burying apparatus guided by pre-positioned pipe or cable {2}
163.~.~.~.~ With bottom fluidizing means

DEFINITION

Classification: 405/163

With bottom fluidizing means:

(under subclass 161) Method or apparatus wherein an initially relatively firm bottom material supporting the pre-positioned string or conduit is caused to assume a flowable state, thereby permitting the string or conduit to settle into a position beneath the bottom.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13, for a box caisson or cofferdam employing fluidizing or jetting means to sink the same.

226, for subject matter relating to securing a marine structure to the bed by jetting.

248, for pile installation using fluid jets.

SEE OR SEARCH CLASS

37, Excavating, 323, and 342+ for dredging by jetting.