Tool bit for impact ripping of a mine face

Details Tool bit for impact ripping of a mine face Tool bit for impact ripping of a mine face

1986-12-23

1988-11-08

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Miscellaneous

175414, 175405, 294 55, E21B 1036

Patent

active

047831235

ABSTRACT:
A percussive tool, and a tool bit for the percussive tool for cutting the face of a deposit to be extracted. The tool bit is a circularly cylindrical columnar structure driven axially by the percussive tool. It is laterally unsupported and unobstructed for a substantial reference length. It has a circular cutting edge whose outer diameter increases as it extends axially away from its cutting end. Its ratio of wall thickness to outer diameter, and reference length to wall diameter, are such as to resist permanent lateral deformation and euler-type columnar collapse. When mounted, the bit is rotatable around its own central axis.

REFERENCES:
patent: 1174433 (1916-03-01), Mowlds
patent: 1636604 (1927-07-01), Hansen
patent: 2549088 (1951-04-01), Hettelsater
patent: 2565528 (1951-08-01), Sloane

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