Boring or penetrating the earth – Ice boring
Patent
1988-04-18
1989-04-11
Dang, Hoang C.
Boring or penetrating the earth
Ice boring
175 53, 175265, 175285, 175286, 175321, 175323, 175384, 175386, F25C 504, E21B 1032, E21B 1707
Patent
active
048197440
ABSTRACT:
An ice auger includes a pair of ice boring blades fixedly attached to the bottom of a straight inner auger drive bar. A brace and bit arrangement at the top of the drive bar is for rotating the drive bar and either forcing it down toward the ice to bore a cylindrical hole of predetermined diameter through the ice or to force it up away from the ice after the hole has been bored to ream out a portion of that hole to form an inverted funnel shape opening. A tubular outer sleeve surrounds the drive bar and is movable between an upper boring condition and a lower reaming condition with respect to the drive bar. Two slotted longitudinally extending ice reaming blades are pivotally mounted at their top portions to the ream control sleeve. A reaming blade camming support bar attached to a bottom portion of the drive bar carries camming pins slidable in the reaming blade slots. These reaming blades move between position inside the predetermined diameter and partially outside of it with movement of the sleeve along the drive bar.
REFERENCES:
patent: 774051 (1904-11-01), Driskill
patent: 1406348 (1922-02-01), Corrigan
patent: 1561523 (1925-11-01), Riedle
patent: 1710998 (1929-04-01), Rudkin
patent: 1970063 (1934-08-01), Steinman
patent: 2301478 (1942-11-01), Tibbals, Jr. et al.
patent: 2401250 (1946-05-01), Kandle
patent: 3299970 (1967-01-01), Anderson
patent: 3336989 (1967-08-01), Henderson
patent: 3397750 (1968-08-01), Wicklund
patent: 3731751 (1973-05-01), Rusco
patent: 3749184 (1973-07-01), Andeen
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