Dredging apparatus having a diver-operated hand-held dredge head

Details Dredging apparatus having a diver-operated hand-held dredge head Dredging apparatus having a diver-operated hand-held dredge head

1988-06-20

1989-08-08

Reese, Randolph A.

Excavating

Peat excavators

37 58, 210170, 210237, 210241, E02F 388

Patent

active

048540587

ABSTRACT:
Dredging apparatus including a diver-operator controlled and hand-held dredge head which permits the diver to move about freely in the water bed being dredged, and provides for continuously dredging the mixture of water and solids from a first body of water and pumping the mixture to a second solids collecting body of water. Submersible, hydraulic dredge pumps are used in the bodies of water. The conveying water is continuously reused in a quasi-closed system by being returned to the immediate vicinity of the nozzle or alternatively being returned through a sleeve concentrically mounted around the nozzle. The returned water discharges downwardly to counterbalance the weight of the operator-held dredge. The second, solids collecting area may take the form of a truck body into which the solid material is dumped and the dredge water passes through into a filter tank from which it is pumped and returned to the dredge area for reuse in transporting additional solids. An improved diver-operated, hand-held dredge which includes a water return means that discharges downwardly in the area of the dredge nozzle so as to counterbalance the weight of the diver-operated hand-held dredge head.

REFERENCES:
patent: 1611478 (1926-12-01), Massey
patent: 3631997 (1972-01-01), De Konig
patent: 3964184 (1976-06-01), Mathieu
patent: 3975842 (1976-08-01), Andreae
patent: 4053181 (1977-10-01), Saito
patent: 4079003 (1978-03-01), Manchak
patent: 4352251 (1982-10-01), Sloan
patent: 4409746 (1983-10-01), Beck
patent: 4801376 (1989-01-01), Kulitz
patent: 4807373 (1989-02-01), Sloan et al.

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