Excavating – Peat excavators
Patent
1976-06-28
1979-01-23
Crowder, Clifford D.
Excavating
Peat excavators
299 87, E02F 388
Patent
active
041353188
ABSTRACT:
A generally conical cutting head for an underwater dredger includes a plurality of helical cutting arms 1 having teeth 4 mounted thereon. The arms are fixed at one end to a hub 2 and at the other end to a base ring 3. The tooth spacing between the respective cutting arms is arranged in a multi-staggered configuration whereby each tooth removes a symmetrical piece of soil and is not subjected to loads parallel to the local section of the contour line 5'.
REFERENCES:
patent: 369976 (1887-09-01), Angell
patent: 887506 (1908-05-01), Newcomb
patent: 1316349 (1919-09-01), Calder
patent: 2340216 (1944-01-01), Gill
patent: 2705128 (1955-03-01), McClennan
patent: 3316988 (1967-05-01), Petersen
patent: 3841707 (1974-10-01), Kniff et al.
patent: 3865202 (1975-02-01), Takahashi et al.
Crowder Clifford D.
Hollandsche Aanneming Maatschappij B.V.
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