Boring or penetrating the earth – Ice boring
Patent
1997-01-03
1999-02-23
Neuder, William
Boring or penetrating the earth
Ice boring
299 24, F25C 504
Patent
active
058734198
ABSTRACT:
An ice cutting instrument for beveling the ice around the bottom of a hole cut in the ice on a lake, which is driven by a motorized power unit. A vertical power shaft supports a cutting blade which can be adjusted between a position near the shaft to an angled position by a control rod extending along the shaft. The shaft carries one or more spacing devices to center it in the hole. The instrument is inserted in the hole, the blade is extended, and the power unit is then energized to rotate the instrument, which is then pulled upwardly to cut the enlarged opening.
REFERENCES:
patent: 3299970 (1967-01-01), Anderson
patent: 3336989 (1967-08-01), Henderson
patent: 3397750 (1968-08-01), Wicklund
patent: 3749184 (1973-07-01), Andeen
patent: 3797588 (1974-03-01), Gonsson et al.
patent: 5190113 (1993-03-01), Hawrylak
Berry Donald Dean
Billberg Thomas Lee
Lund Charles August
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