Patent ID: 6045301
Filing Date: 2000-04-04
Classification: B23B,Y10T

Abstract:
A drill having a longitudinal axis, said drill comprising:a blade;said blade comprising a first portion and a second portion;said first portion of said blade comprising a drill tip;said drill tip being disposed adjacent to an end of said blade;said drill tip being configured and disposed to drill a hole in a material to be drilled having a solid surface;said drill tip being substantially cone-shaped;said drill tip having a base portion and a tip portion;said base portion being substantially wider than said tip portion;said base portion being disposed on an end of said drill tip immediately adjacent said second portion of said blade;said tip portion being disposed on an end of said drill tip opposite said base portion;said tip portion comprising a drill point disposed along the longitudinal axis of said drill;said second portion of said blade comprising at least one chip flute;said at least one chip flute being configured and disposed to remove chips generated by said drill tip;said at least one chip flute being configured and disposed about the longitudinal axis of said drill;at least one channel being configured to permit passage of a fluid through said drill;said at least one channel being configured and disposed to extend within said drill in a substantially longitudinal direction;said blade comprising at least one orifice to discharge a fluid supplied by said at least one channel;said at least one orifice being connected to said at least one channel;said at least one orifice being configured and disposed at said at least one chip flute;said drill is a twist drill;said at least one orifice being disposed solely on said second portion of said blade and not on said drill tip;said at least one orifice being disposed adjacent to said drill tip;said blade has a substantially cylindrical shape;said substantially cylindrical shape of said blade has a diameter;said second portion of said blade comprises a segment;said at least one orifice is disposed on said segment of said second portion of said blade;said segment of said second portion of said blade is configured and disposed to extend from said drill tip for a length of about twice the diameter of said blade in a substantially longitudinal direction;a shank;said shank is disposed substantially adjacent to said second portion of said blade;said at least one chip flute is configured and disposed to spiral about the longitudinal axis of said drill;said drill tip comprises at least one edge;said at least one edge is configured and disposed to extend from said drill point toward said second portion of said blade;said first portion of said blade comprises at least one flank surface;said at least one flank surface is disposed adjacent to said at least one edge;said at least one flank surface is configured and disposed to extend from said drill point towards said second portion of said blade;said at least one edge is at least one first edge;said second portion of said blade comprises at least one second edge;said at least one second edge is configured and disposed to spiral about the longitudinal axis from said at least one first edge adjacent to said at least one chip flute;said second portion of said blade comprises at least one surface;said at least one surface is configured and disposed to extend in a spiral from said at least one flank surface adjacent to said at least one chip flute;said at least one surface comprises a land;said at least one second edge is disposed on said land;said second portion of said blade comprises at least one connecting channel;said at least one connecting channel is configured and disposed to connect said at least one orifice to said at least one fluid channel;said at least one connecting channel is formed by a boring;said at least one orifice comprises a plurality of orifices;said at least one connecting channel comprises a plurality of connecting channels;each of said plurality of connecting channels is connected to a corresponding one of said plurality of orifices;each of said plurality of connecting channels and each of said plurality of orifices are configured to have a smaller diameter upon said plurality of connecting channels and said plurality of orifices being disposed a greater distance from said drill tip;each of said plurality of connecting channels has a central axis; andthe central axis of each of said plurality of connecting channels is disposed to form an angle of about 75 to 90 degrees with the longitudinal axis of said drill.