Patent ID: 8454640

Claim:
A cutting blade assembly usable with a handle as a powered surgical apparatus, the handle having an interior surface that defines at least one channel and a motor that rotates the interior surface, the cutting blade assembly comprising: an outer tube defining a cutting window; an outer hub secured to the outer tube; an inner tube extending within the outer tube, the inner tube defining a cutting surface; an inner hub secured adjacent to a proximal end of the inner tube, the inner hub being removable from the handle, the inner hub defining an exterior and at least two drive splines extending longitudinally along the exterior, one of the at least two drive splines communicating with the at least one channel of the handle to enable rotation of the inner hub and the inner tube; and a spring, wherein: each of the at least two drive splines extends in a radial direction so as to form a raised portion on the exterior of the inner hub; a width of each drive spline in a circumferential direction of the inner hub is less than a width of a gap between adjacent drive splines in the circumferential direction; the at least two drive splines extend distally along the exterior of the inner hub from a location adjacent to a proximal end of the inner hub to substantially a midpoint of the inner hub but extends less than a full length of the inner hub, the inner hub defining an annular hub at a distal end of the inner hub; and the inner hub defines at least one spring retention projection spaced from the annular hub so as to define at least one spring retention channel therebetween, one end of the spring being retained within the at least one spring retention channel and an opposite end of the spring abutting a distal end of the one of the at least two drive splines.