Tool for boring an enlarged portion within the interior of a hol

Details Tool for boring an enlarged portion within the interior of a hol Tool for boring an enlarged portion within the interior of a hol

1983-10-25

1985-07-30

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Adjustable cutter element

175262, E21B 1032

Patent

active

045315965

ABSTRACT:
An improved boring tool comprising a longitudinal groove in its shaft and a two-armed tool within the groove is provided for boring an enlargement within a hole. The two-armed tool has a rear actuating arm and a forward cutting arm and is tiltably supported in the groove for tilting between an ineffective position, in which its actuating arm extends out of the groove for cooperating with the edge of the outer end of the hole, and effective positions in which the cutting arm reaches out of the groove for cutting the enlargement into the wall of the hole when the edge of the open end of the hole forces the actuating arm into the groove.

REFERENCES:
patent: 402394 (1889-04-01), Brown
patent: 833240 (1906-10-01), Potter
patent: 1832129 (1931-11-01), Knaur
patent: 4169510 (1979-10-01), Meigs

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