US PATENT SUBCLASS 405 / 162
.~.~.~.~ With apparatus buoyancy control

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}
162.~.~.~.~ With apparatus buoyancy control

DEFINITION

Classification: 405/162

With apparatus buoyancy control:

(under subclass 161) Method or apparatus in which the device guided along the string or conduit includes variable ballast means whereby the attitude or the distance below the water surface of the device is controlled while the device is positioning the string or conduit beneath the bottom.

(1) Note. A burying or entrenching device having the ballast means the sole purpose of which is to sink the device down to its working position and raise the same therefrom is excluded.

SEE OR SEARCH THIS CLASS, SUBCLASS:

205+, for marine structures which are sunk or have their attitude controlled by ballasting means.

SEE OR SEARCH CLASS

114, Ships,

319+, for submarines with ballasting means.