Drive mechanism for sand, etc., dredging apparatus

Details Drive mechanism for sand, etc., dredging apparatus Drive mechanism for sand, etc., dredging apparatus

1980-05-30

1982-02-23

Crowder, Clifford D.

Excavating

Peat excavators

277 3, E02F 388

Patent

active

043163360

ABSTRACT:
A dredging apparatus for extracting sand, gravel and the like from the bed of a body of water features an improved drive mechanism having an enclosed drive shaft between an above-water carrier to an under-water excavator or the like, the enclosed drive being substantially water-tight and pressurized to at least partly balance the interior of the enclosure means and the bearing and seal contained therein against the under-water pressure exerted externally of the enclosure. More specifically, the enclosure is supplied with fluid from a power source that includes a hydraulic drive means.

REFERENCES:
patent: 484763 (1892-10-01), Bowers
patent: 1861349 (1932-05-01), Lockett
patent: 2908534 (1959-10-01), Rietsch
patent: 2990894 (1961-07-01), Mitchell et al.
patent: 3088744 (1963-05-01), Ezekiel et al.
patent: 3631834 (1972-01-01), Gardner et al.

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