Patent ID: 9273446
Filing Date: 2016-03-01
CPC Classification: E02F

Claim Text:
1. An underwater trenching apparatus comprising: at least one trenching tool; a lifting attachment point configured for attachment of a lifting means for lowering the trenching apparatus to, or raising the trenching apparatus from, its location of operation; at least two steerable endless track units for transmitting tractive effort to move the underwater trenching apparatus in use; and a main body portion to which the lifting attachment portion is attached and to which the endless track units are mounted; for each steerable endless track unit: wherein each steerable endless track unit is independently steerable, and wherein each endless track unit is attached to a first end of a respective leg, the second end of leg being attached to the main body portion, the track units being rotatable with respect to the respective legs about a nominally horizontal axis and the respective second ends of the legs are attached to the main body portion and are rotatable with respect to the main body portion about a nominally horizontal axis extending substantially perpendicular to the direction of travel of the apparatus.