CPC E21C 35/19 (2013.01) [E21C 35/18 (2013.01); E21C 35/1835 (2020.05); E21C 35/1837 (2020.05)] | 19 Claims |
1. A mineral bit having a body with a cutting tip attachment face for releasably retaining a cutting tip, the cutting tip attachment face being a concave surface and extending across the entire attachment face spanning from one side surface to the other side surface of the body for engaging a convex rear surface of the cutting tip, wherein the cutting tip attachment face is configured to be opposite a cutting face of the cutting tip.
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12. A mineral bit comprising a body having a head portion and a shank, and a cutting tip secured to the head portion, the cutting tip having a base surface free of projections and a convex rear surface each opposing the head portion, wherein the base surface is adjacent the convex rear surface, and wherein the head portion includes a cutting tip attachment face for releasably retaining the cutting tip, the attachment face being a concave surface for mounting-the convex rear surface of the cutting tip.
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