Patent ID: 7344546

Claim:
An assembly to remove matter from a cavity in a body, comprising: multiple blades capable of removing the matter using differential cutting techniques, each blade having a facing surface presented in front of an opposing blade facing surface and each blade positioned to form an acute blade angle of attack of between about 30 degrees and about 90 degrees; at least two ports to remove the matter, each port being positioned between the facing surfaces of two opposing blades; a conduit in communication with the ports to direct the removed matter away from the site of the matter; and a distal ring in contact with the blades at the distal end of the blades and a proximal ring having a proximal ring face in contact with the blades at the proximal end of the blades, the proximal ring being larger than the distal ring, and the ports being defined by the proximal ring face and the opposing blade's facing surfaces.