Patents Assigned to Bestner Inc.
  • Patent number: 8834077
    Abstract: A method of fabricating a micro drill, which includes a drill part for machining a hole and a shank part fixed to a motor, the drill part and the shank part being made of different materials. The method includes the steps of forming a drill part-forming powder compact having a recess in one end thereof, and forming a shank part-forming powder compact having a protrusion, the protrusion intended to be fitted into the recess of the drill part-forming powder compact, forming an assembly of the drill part-forming powder compact and the shank part-forming powder compact, with the protrusion fitted into the recess, and simultaneously sintering the assembly of the drill part-forming powder compact and the shank part-forming powder compact.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: September 16, 2014
    Assignee: Bestner Inc.
    Inventors: Tae Sik Yoon, Soon Jin Cho, Seung Hyun Cho, Jae Joon Lee