Suction dredger

Details Suction dredger Suction dredger

1976-02-23

1979-11-27

Crowder, Clifford D.

Excavating

Peat excavators

37 72, 91 24, 91390, 254172, E02F 388

Patent

active

041753429

ABSTRACT:
A suction dredger, comprising a vessel and a suspension conveying conduit provided with a pump and having a nozzle suspended by means of at least one cable of a lifting device on the vessel, is improved for preventing breaking of the cable or damage of other dredger parts. To this aim the lifting device comprises a cable length variator having a piston movable in a cylinder, a pick-up system for picking up the travel of the piston, a fluid conduit communicating with the cylinder for supplying and discharging fluid and control circuitry for controlling the supply and discharge of the fluid so in dependence on the travel picked up by the pick-up system, that the piston is pushed backwards into a prescribed stretch.

REFERENCES:
patent: 3208728 (1965-09-01), Parks
patent: 3309065 (1967-03-01), Prud'homme et al.
patent: 3388070 (1968-06-01), Born et al.
patent: 3512281 (1970-05-01), Hadjidakis
patent: 3574999 (1971-04-01), Nectoux
patent: 3653635 (1972-04-01), Bates, Jr. et al.
patent: 3681862 (1972-08-01), De Koning et al.
patent: 3718316 (1973-02-01), Larralde et al.
patent: 3734564 (1973-05-01), McKay et al.
patent: 3739503 (1973-06-01), Barker et al.

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