Patents Assigned to Alfa Manufacturing Industries, Inc.
  • Multi-stepped power drill bit having handle chuck adaptor
    Patent number: 5466100
    Abstract: A power drill bit having a stepped construction, referred to as a cone drill, and a quick change capability provided by a shank having a non-circular cross-section and a circumferential groove for quick connect-disconnect in a power tool or drill. The preferred embodiment includes a hexagonal shank which is at least one-half of the axial length of the drill bit in order to provide a better engagement to the power chuck.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: November 14, 1995
    Assignee: Alfa Manufacturing Industries, Inc.
    Inventor: Diljit S. Ahluwalia