Patent ID: 7666200

Claim:
An endoscopic surgical assembly comprising an elongated inner member and an elongated outer member, each of said elongated members comprising a concentric, closed-ended tube provided with a coordinating hub disposed at its proximal end, a laterally facing aperture disposed at its distal end, and a central lumen extending along its length and defining inner and outer surfaces, said inner member sized so as to be slidably received within the lumen of said outer member such that said when said inner and outer hubs are connected, the distal outer surface of the inner member contacts the distal inner surface of the outer member to form a bearing surface and the respective laterally facing apertures of said inner and outer members, each of which is provided with at least one longitudinal cutting surface, cooperate to resect tissue in contact therewith, said assembly further comprising a means for automatically transmitting relative back and forth axial movement between said inner and outer members when said inner member and outer member are relatively rotated in an oscillatory fashion, in one direction for a first predetermined number of revolutions then in an opposite direction for a second predetermined number of revolutions.