US 12,070,807 B2
One-piece cutting head for a drill bit
Juri Schatz, Limburg (DE); Alexander Stangl, Furstenzell (DE); Florian Probst, Aidenbach (DE); and Christoph Gastinger, Hutthurm (DE)
Assigned to BLACK & DECKER INC., New Britain, CT (US)
Filed by BLACK & DECKER INC., New Britain, CT (US)
Filed on Mar. 11, 2022, as Appl. No. 17/692,428.
Claims priority of application No. 21163504 (EP), filed on Mar. 18, 2021.
Prior Publication US 2022/0297204 A1, Sep. 22, 2022
Int. Cl. E21B 10/42 (2006.01); B23B 51/02 (2006.01); B28D 1/14 (2006.01); E21B 10/43 (2006.01); E21B 10/54 (2006.01)
CPC B23B 51/02 (2013.01) [B28D 1/146 (2013.01); E21B 10/42 (2013.01); E21B 10/43 (2013.01); E21B 10/54 (2013.01); B23B 2226/75 (2013.01); B23B 2251/14 (2013.01); B23B 2251/204 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A one-piece cutting head for a drill bit, comprising:
first and second main cutting edges extending from a central portion of the cutting head to first and second radial extremities of the cutting head, the first main cutting edge being disposed between a first main rake surface and a first main relief surface, and the second main cutting edge being disposed between a second main rake surface and a second main relief surface, wherein each main rake surface includes one or more rake facets and each main relief surface includes one or more relief facets, and wherein the first main rake surface and the second main relief surface define a first primary transverse edge therebetween and the second main rake surface and the first main relief surface define a second primary transverse edge therebetween, each primary transverse edge extending away from the main cutting edges in a transverse direction from the main cutting edges,
first and second side cutters that are transverse to the main cutting edges, the first and second side cutters propagating from the first and second primary transverse edges and extending to third and fourth radial extremities of the cutting head that are different from the first and second radial extremities, and wherein each side cutter includes a side cutting edge between a side cutting rake facet and a side cutting relief facet; and
first and second pockets defined in the first and second main relief surfaces, the first and second pockets each having a longitudinal span in a direction transverse to the first and second main cutting edges and a horizontal span in a direction parallel to the first and second main cutting edges, each horizontal span having a horizontal length that is less than a length of each main cutting edge.