Drill having means for locating cutting bit in a bit holder

Details Drill having means for locating cutting bit in a bit holder Drill having means for locating cutting bit in a bit holder

1985-06-26

1987-01-06

Leppink, James A.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175418, E21B 1058, E21B 1062

Patent

active

046339590

ABSTRACT:
A mining drill having a generally cylindrical, hollow bit holder and a cutting bit attached to the holder. The holder has a diametrically located web and two side wall surfaces projecting from opposite longitudinal sides of the web. A pair of cutting bit locating inclined surfaces are located on the web, each one of the inclined surfaces slanting toward a different one of the two wall surfaces. The cutting bit is sized and configures to be received in the space between the wall surfaces and has a flat bottom surface which rests on the web. The cutting bit is formed with two beveled notches, each notch receiving a different one of the inclined surfaces located on the web for locating the cutting bit in a predetermined relationship to the two side wall surfaces. The cutting bit is attached to the bit holder by solder between the cutting bit and side wall surfaces of the bit holder.

REFERENCES:
patent: 993972 (1911-05-01), English
patent: 2902260 (1959-09-01), Tilden
patent: 3049033 (1962-08-01), Benjamin et al.
patent: 3807515 (1974-04-01), Evans
patent: 4257307 (1981-03-01), Regensburger
patent: 4356873 (1982-11-01), Dziak
patent: 4433739 (1984-02-01), Sarin
patent: 4492278 (1985-01-01), Leighton

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