Patent ID: 6116825
Filing Date: 2000-09-12
Classification: B23B,Y10T

Abstract:
A drill having a longitudinal axis, said drill comprising:a shank portion;a cutter portion;said cutter portion being disposed to extend from said shank portion;said cutter portion comprising a drill tip to drill a hole in a material to be drilled;said drill tip being disposed opposite to said shank portion;at least one channel;said at least one channel being configured and disposed to extend at least along said cutter portion in a substantially longitudinal direction;said at least one channel being configured to permit flow of lubricant through said drill;at least one reservoir being configured to receive and contain lubricant;said at least one reservoir being disposed within said drill;said at least one reservoir being operatively connected hydraulically to said at least one channel to permit lubricant in said at least one reservoir to enter said at least one channel;said cutter portion 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 disposed to spiral from said drill tip to said shank portion about the longitudinal axis;said cutter portion comprising at least one opening;said at least one opening being disposed adjacent to said drill tip;said at least one channel being operatively connected to said at least one opening to permit discharge of lubricant from said cutter portion;said shank portion comprising an end;said end of said shank portion being disposed opposite said cutter portion;said at least one reservoir comprising an arrangement to permit refilling of said at least one reservoir with lubricant;said lubricant contained in said at least one reservoir being substantially pressurized;said drill comprising a dispenser;said dispenser being configured and disposed to exert a force on said lubricant in said at least one reservoir; andsaid dispenser comprising one of a) and b):a) an expandable gas cushion; andsaid expandable gas cushion being configured and disposed to apply a pressure to said lubricant contained in said at least one reservoir; andb) a piston;a spring; andsaid piston and said spring together being configured and disposed to apply a pressure to said lubricant contained in said at least one reservoir.