Mineral cutter tip and pick

Cutlery – Cutting tools – Hatchet – ax – or adze

Patent

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Details

299 79, E21B 1000

Patent

active

053198557

ABSTRACT:
A tip (1A, 1B, 1C, or 1D) of hard material has in at least one external surface, a wear line or marker (12) in the form of a rib (13, 16 or 17), or a groove (15) capable of being felt by a thumb or finger of a miner, so that a visual inspection for wear is unnecessary. The invention also includes a pick (5) provided with such a tip.

REFERENCES:
patent: 1081131 (1913-12-01), Moore
patent: 1927818 (1933-09-01), Brodersen
patent: 2828117 (1958-03-01), Bruestle et al.
patent: 4674802 (1987-06-01), McKenna et al.
patent: 4725098 (1988-02-01), Beach

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