Excavating – Beneath a body of water – With means to scour or scrape
Patent
1998-12-09
2000-07-11
Shackelford, H.
Excavating
Beneath a body of water
With means to scour or scrape
37352, 37403, 37410, 37189, E02F 328, E02F 378
Patent
active
060854464
ABSTRACT:
An excavating device has conical milling tools each having a longitudinal center axis. At least one motor is provided for rotatingly driving the milling tools about their longitudinal center axis. The milling tools each have a mantle surface. The mantle surfaces are positioned at one circumferential point adjacent to one another at a minimum spacing defining a working play between the milling tools such that the mantle surfaces form a continuous working plane. The longitudinal center axis of the milling tools are positioned angularly to one another and to a vertical axis extending between the milling tools. Each longitudinal center axis is positioned at an angle of between 50.degree. and 70.degree. to the vertical axis. Each one of the longitudinal center axes is positioned at an angle of less than 90.degree. relative to the advancing direction of the excavating device.
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patent: 3000620 (1961-09-01), Densmore
patent: 3148917 (1964-09-01), Thompson
patent: 3341254 (1967-09-01), Arndt
patent: 3477762 (1969-11-01), Frenyo et al.
patent: 4100688 (1978-07-01), Grist
patent: 5592761 (1997-01-01), Ward
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