Underwater trenching machine for burying pipeline and the like

Details Underwater trenching machine for burying pipeline and the like Underwater trenching machine for burying pipeline and the like

1970-09-27

1981-07-28

Chowder, Clifford D.

Excavating

Peat excavators

405160, 405163, 104118, 105141, 105215R, F16L 100, E02F 502

Patent

active

042802890

ABSTRACT:
An underwater trenching machine comprising a carriage and a pair each of fore and aft pivotal frames, each of which carries a drive roller means for intimately contacting the pipeline, said front and rear frames being adapted to mutually exclusively pivot outwardly upon command so that the frame carrying the roller means resting at that time on the pipeline takes over the drive function performed by the roller means on both pair of frame means theretofore, and further including improved jet legs each divided into multiple sections for enabling differential water velocity while minimizing water pressure loss through the length thereof, all while the machine is maintained at a predetermined buoyance and attitude.

REFERENCES:
patent: 3004392 (1961-10-01), Symmank
patent: 3333432 (1967-08-01), Hale et al.
patent: 3717003 (1973-02-01), Bates, Jr. et al.
patent: 3732701 (1973-05-01), Lynch
patent: 3877237 (1975-04-01), Normon
patent: 3978679 (1976-09-01), Lecomte
patent: 4112695 (1978-09-01), Chang et al.
patent: 4127950 (1978-12-01), Tillinghast et al.

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