Rotary mining tool and keeper arrangement therefor

Claim 2

In a mining tool; a tool body having a longitudinal axis and symmetrical about said axis, said tool having a working region on said axis at the forward end tapering into a point and a shank on said axis at the rearward end, said shank being circular in cross section, rearwardly facing shoulder means formed on said shank in the region thereof between the forward end of said shank and a point about midway of the length of the shank for supporting the tool body during working operations, a resilient rubber-like ring on said shank near the rear end thereof, and a metal ring on said shank at the rear side of said rubber-like ring, each of said rings when mounted in said shank protruding radially outwardly from said shank.

Claim 3

A mining tool according to claim 1 in which the working region of said tool body comprises a tapered forward end on said body which terminates in a point located on said longitudinal axis.

Claim 4

A mining tool according to claim 2 in which said point is formed by an element of hard wear resistant material embedded in the tapered forward end of said body.

Claim 5

A mining tool according to claim 1 in which said shoulder is in about the middle of the length of said shank.

Claim 6

A mining tool according to claim 4 in which said shoulder tapers outwardly in the forward dirEction.

Claim 7

A mining tool according to claim 1 in which said shank is formed with a groove near the rear end and said rubber-like ring is seated in the forward end of said groove and said metal ring is a snap ring seated in the rear end of said groove.

Claim 8

A mining tool according to claim 6 which includes a support block having a front face and a rear face and a bore extending through the block and also through said front and rear faces, said bore being adapted to receive said shank from the forward end of the bore, said block having a forwardly facing shoulder engaging the rearwardly facing shoulder on said shank, the rearward end of said shank protruding from the rearward end of said bore and said groove being disposed immediately rearwardly of the rear face of said block when the shoulder on said shank engages the shoulder on the block, the forwardly facing side of said rubber-like ring being adjacent the rear face of said block and said snap ring being adjacent the rearwardly facing side of said rubber-like ring.

Claim 9

A mining tool according to claim 7 in which said front and rear faces of said block in at least the region thereof adjacent to and surrounding said bore are perpendicular to the axis of said face, said tool body having an annular flange thereon with a radially disposed rearwardly facing side which is disposed in adjacent relation to said region of said forward face when said shank is in said bore and the shoulder on said shank is in engagement with the shoulder on said block.

Claim 10

A mining tool according to claim 7 in which said rear face of said block in at least the region thereof adjacent to and surrounding said bore is perpendicular to the axis of said bore.

Claim 11

A mining tool according to claim 9 in which said resilient rubber-like ring is lightly compressed between the rear face of said block and said snap ring.

Claim 12

A mining tool according to claim 1 in which said metal ring is a washer-like member having teeth distributed about the inside thereof for resilient gripping engagement with said shank.