Patent
1975-04-23
1976-04-27
Shapiro, Jacob
61 726, 37 83, 37189, E02F 502, B63B 3504
Patent
active
039525325
ABSTRACT:
A sled supports a hydraulic motor drive digging wheel in the bottom of a body of water with a cable guide conduit feeding cable into the trench behind the wheel; hydraulic cylinders adjust the depth of the trench with all means being controlled from a support barge or the like providing hydraulic power and control fluid.
REFERENCES:
patent: 737021 (1903-08-01), Roberts
patent: 3412490 (1968-11-01), Reising
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