Patent ID: 6638289
Filing Date: 2003-10-28
Classification: A61B

Abstract:
A cutting accessory for use with a powered surgical tool, said cutting accessory including:an elongated inner tube having a proximal end and a distal end opposite the proximal end; an inner hub attached to the proximal end of said inner tube; a cutting member at least partially integral with the distal end of said inner tube; an outer hub disposed over said inner tube and located forward of said inner hub, said outer hub shaped to be releasably held to a powered surgical tool, said outer hub being formed have an axially extending through bore, wherein said inner tube extends through the through bore, and a lateral bore that opens into the through bore; an outer tube assembly, wherein said inner tube is at least partially disposed in said outer tube assembly, said outer tube assembly having: a first section that has a proximal end that is seated in the through bore of said outer hub and that extends forward from said outer hub and that extends over a proximal portion of said inner tube, the first section having first inner and outer diameters and being formed with an opening that is in registration with the end of the outer hub lateral bore that opens into the through bore; and a second section that is attached to and extends forward of said first section, the second section extending over a distal portion of said inner tube and having second inner and outer diameters, the second inner diameter being less than the first inner diameter, and the second outer diameter being less than the first outer diameter wherein said inner tube and said outer tube assembly are dimensioned so that said outer tube assembly first and second sections are spaced away from said inner tube; and a bearing sleeve fitted to said inner tube so as to extend from a position proximal to the opening in the first section of said outer tube assembly towards said inner hub so that at least a portion of said inner tube over which said outer tube first section extends is not covered by said bearing sleeve, said bearing sleeve providing an interface between said inner tube and the first section of said outer tube assembly.