US 12,114,869 B2
Calcar grinder
Karin Franziska Blaser, Koniz BE (CH); and Konrad Schaller, Grenchen SO (CH)
Assigned to Smith & Nephew Orthopaedics AG, Zug (CH)
Appl. No. 17/428,333
Filed by Smith & Nephew Orthopaedics AG, Zug (CH)
PCT Filed Feb. 5, 2020, PCT No. PCT/EP2020/052885
§ 371(c)(1), (2) Date Aug. 4, 2021,
PCT Pub. No. WO2020/161196, PCT Pub. Date Aug. 13, 2020.
Claims priority of application No. 1901589 (GB), filed on Feb. 5, 2019.
Prior Publication US 2022/0104835 A1, Apr. 7, 2022
Int. Cl. A61B 17/16 (2006.01); A61B 17/56 (2006.01); A61F 2/46 (2006.01)
CPC A61B 17/1659 (2013.01) [A61B 17/1615 (2013.01); A61B 2017/564 (2013.01); A61F 2/4607 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An apparatus for removing bone or tissue at a target location, comprising:
a shaft member having a drive end securable to a rotating drive unit; and
a cutting head member at a remaining end of the shaft member distal to the drive end;
wherein:
the cutting head member includes a cylindrical cutting head body having a cutting surface including a plurality of circumferentially extending radial recessed regions and a plurality of circumferential crests disposed between adjacent revolutions of the plurality of circumferential recessed regions, the cutting head body including a first head member end surface and a second head end surface spaced apart from the first head member end surface via a cylindrical edge region of the cutting head body, the second head end surface including the cutting surface;
the plurality of circumferential crests include a plurality of teeth thereon;
each circumferential recessed region is disposed at a distinct distance from a center of the second head member end surface; and
a central region of the cutting surface is recessed around a position coinciding with a primary longitudinal axis of the shaft member.