Rotary stone-cutting head

Details Rotary stone-cutting head Rotary stone-cutting head

1982-06-18

1984-07-24

Purser, Ernest R.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Tooth mounted on helical head portion or head with helical...

37142R, 175413, 299 90, E21C 3518

Patent

active

044615132

ABSTRACT:
A rotary stone-cutting head has a body generally centered on and adapted to be rotated in a predetermined direction about an axis. An array of cutter supports on the body directed at least partially in the direction carry respective cutter teeth each having relative to the axis an outer cutting edge and relative to the direction a generally angularly forwardly directed face adjacent the edge and formed with an array of holding recesses. The teeth are at least at the edges of hardened metal. The teeth are removably secured to the respective supports and respective hardened-metal breaking pins have shanks fitted to the recesses and points directed angularly forwardly in the direction. At least some of the points lie angularly ahead in the direction of the respective cutting edge. These points having a crushing effect that greatly augments the effectiveness of the cutting edges.

REFERENCES:
patent: 2861908 (1958-11-01), Mickelson et al.
patent: 3235018 (1966-02-01), Troeppl
patent: 3693734 (1972-09-01), Richmond
patent: 3737199 (1973-06-01), Stephenson
patent: 3834764 (1974-09-01), Krekeler
patent: 4320925 (1982-03-01), Bowes

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