Mineral cutting device
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United States of America Patent
Stats
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Mar 24, 1987
Grant Date -
N/A
app pub date -
May 2, 1985
filing date -
May 4, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mineral cutting device comprises a plurality of replaceable picks (10, 10A-10G) and associated water conveying lances (20, 20A-20G), each lance being of flexible, tubular synthetic plastics material having a hollow, water-conveying interior and being contained, at least partially, within a bore (13, 13A, 13B) in the pick (10, 10A-10G) when the pick (10, 10A-10G) has been mounted on the device (1, 1A, 1B), to line the bore and prevent water pressure within the lance being effective on the pick, with a terminal end of each lance provided with a metallic nozzle secured in water sealing manner thereto and providing a water discharge orifice (23). The invention further includes a lance (20, 20A-20G) for use with the mineral cutting device defined above, and also a shank bore (13B) formed at least partially in a side (27) of the pick shank (12, 12A-12D), which, in use, is the compressive stress side, and/or with an inner bore end (15) intersected by a slot (42) provided in at least a portion of the shank (12D).
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