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US 4,902,073 AGranted
Cutter pick for mining using hydraulic stream
OwnerPeter N. Tomlinson, Klaus Tankinventors
Life of this patent
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Abstract
A cutter pick for a mining machine has a lug carrying a cutting tip of hard, abrasion resistant material at its forward end. A passage extends through the lug with provision at its rearward end for connection to a source of high pressure liquid and with a nozzle at its leading end venting through the cutting tip. The intention is that high pressure liquid issueing from the nozzle will degrade the rock before it is attacked by the cutting tip.
Claims6
A cutter pick for a mining machine, the cutter pick comprising:
- (a) a lug;
- (b) a cutting insert at a forward end of the lug, the cutting insert including a forward layer of hard, abrasion resistant material presenting a planar cutting face carried by a carbide backing, said carbide backing secured to a carbide body which is secured to the lug;
- and (c) a passage extending forwardly through the lug from the rearward end of the lug, through the carbide backing and through the forward layer so as to vent through the cutting face, the passage at its rearward end being connectable to a source of high pressure liquid and with its forward end, at a location inside the carbide backing, undergoing a reduction in cross-section so that, in use, a high pressure jet of liquid issues through the cutting face to impinge on and degrade a rock face ahead of the cutting insert.
Dependencies are inferred from the claim text.