Buoyant self-propelled underwater trenching apparatus

Details Buoyant self-propelled underwater trenching apparatus Buoyant self-propelled underwater trenching apparatus

1971-08-27

1978-05-09

Shapiro, Jacob

37 60, E02F 502

Patent

active

040879810

ABSTRACT:
An underwater self-propelled buoyant trenching apparatus for burying a pipeline or cable on the bottom of a body of water. Water jets on a frame cut the trench, and a venturi operated eductor means sucks up and discharges the cuttings. The apparatus is motivated by a drive roller that is resiliently urged against the pipeline. Forward guide rollers sense the pipeline direction and act to torque the apparatus onto the centerline of the pipeline. The arrangement of the jet nozzle minimize the rearward thrust. Buoyant outrigger tanks adjust the attitude of the apparatus over the pipeline. The hose bundle is buoyant due to the oversize air hose.

REFERENCES:
patent: 2044088 (1936-06-01), Lord
patent: 3429132 (1969-02-01), Martin
patent: 3504504 (1970-04-01), Elliott
patent: 3590589 (1971-07-01), Smulders

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