Patent ID: 9232957
Filing Date: 2016-01-12
CPC Classification: A61B

Claim Text:
1. An apparatus for abrading tissue, comprising: an outer assembly having an outer tube, the outer tube being made of two pieces formed of materials with different hardnesses and being provided with a distal end, a proximal end, and a fixed bend therebetween, wherein the distal end of the outer tube is provided with a counterbore monolithically formed into an inner lumen of the outer tube; an inner assembly rotatably positioned within the outer tube, wherein an inner tube of the inner assembly is removable from the outer tube of the outer assembly, the inner tube having a proximal end and a distal end; and an abrading element located at a most distal end of the inner tube, wherein the distal end of the inner tube has affixed thereto a flexible coil portion proximal to the abrading element, the flexible coil portion terminating in a shoulder at its most distal end, the shoulder being machined onto the inner tube and having a width greater than a width of the inner lumen of the distal end of the outer tube, and wherein the shoulder of the inner tube rests on the counterbore of the outer tube when the inner assembly is inserted into the outer tube to center the abrading element and prevent wobble and extrusion of the abrading element out of the outer tube during rotation, and without permitting the flexible coil portion to stretch.