Boring or penetrating the earth – Ice boring
Patent
1987-07-01
1996-01-16
Walsh, Donald P.
Boring or penetrating the earth
Ice boring
299 3, F25C 504
Patent
active
054840279
ABSTRACT:
A device for producing a small (approx. 1" diameter) penetration through quickly. The device is a penetrator having a conical shape. The penetrator includes a ceramic cone having spiral grooves that house a high resistance wire. The wire supplies heat upon being energized. A high thermal dielectric and a metallic shroud are placed over the cone and wire to provide uniform heating to the surrounding area and to prevent short-circuiting of the device.
REFERENCES:
patent: 3390729 (1968-07-01), Aamot
patent: 3680645 (1972-08-01), Horbach
patent: 4651834 (1987-03-01), Eninger
Greenlaw Robert T.
Kornblith Jeffrey S.
Lall Prithvi C.
McGowan Michael J.
Oglo Michael F.
The United States of America as represented by the Secretary of
Walsh Donald P.
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