Water spray unit for mining

Details Water spray unit for mining Water spray unit for mining

1990-02-05

1991-04-16

Britts, Ramon S.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Cleansing fluid passage

175424, 239600, E21C 3522

Patent

active

050076841

ABSTRACT:
A water spray unit is provided, to be located in a receiving bore provided in a pick box. The unit comprises an elongate nozzle portion and a fastener for the nozzle portion. The nozzle portion has an internal water receiving chamber and a water inlet orifice communicates with the chamber. At one end of the nozzle portion, a water discharge orifice communicates with the chamber. An external screw thread is provided on the fastener and drive surfaces on the fastener serve to screw or unscrew the fastener. One end of the nozzle portion is distal from said fastener and terminates in a nose having a frustoconical sealing surface, adapted, in use, to be forced by the fastener, into tight, water sealing engagement with a complementary frustoconical seat of the receiving bore. The invention also includes a pick box provided with such a water spray and a rotary cutting head provided with such a pick box.

REFERENCES:
patent: 3101906 (1963-08-01), Webber
patent: 3876253 (1975-04-01), Parker
patent: 4333687 (1982-06-01), Barnstorf
patent: 4668018 (1987-05-01), Demoulin et al.

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