Patent ID: 6009933
Filing Date: 2000-01-04
Classification: A61M,B24B

Abstract:
A method for forming a needle having a multi-beveled point, said needle having a cannula with a lumen and a central axis therethrough, said multi-beveled point provided at one end of the cannula, comprising the following steps:positioning said cannula at a first planar angle measured between said central axis and a reference plane;forming a primary bevel at said first planar angle, said primary bevel positioned at a first rotational angle respective of the central axis;rotating said cannula in a first direction about said central axis to a second rotational angle respective of the first rotational angle of said primary bevel;forming a first middle bevel at said second rotational angle;rotating said cannula about said central axis, in a second direction opposite to said first direction, to a third rotational angle respective of said first rotational angle, said third rotational angle substantially equal to said second rotational angle;forming a second middle bevel at said third rotational angle;positioning said cannula at a second planar angle measured between said central axis and said reference plane;rotating said cannula in said first direction about said central axis to a fourth rotational angle respective of the first rotational angle of said primary bevel;forming a first tip bevel at said fourth rotational angle;rotating said cannula about said central axis in said second direction to a fifth rotational angle respective of the first rotational angle of said primary bevel, said fifth rotational angle substantially equal to said fourth rotational angle; andforming a second tip bevel at said fifth rotational angle.