Patent ID: 8702738

Claim:
A tissue removal device, comprising: a handpiece having a proximal section and a distal section, wherein a motor having a motor longitudinal axis is disposed in the proximal section, the distal handpiece section having a distal handpiece section longitudinal axis, wherein the proximal section and the motor longitudinal axis are angled with respect to the distal section longitudinal axis; an outer cannula having an outer cannula lumen, a proximal end, a distal end, and an outer cannula opening adjacent the distal end, wherein the opening adjacent the distal end defines a cutting edge for severing tissue; an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen, the inner cannula having an inner cannula longitudinal axis, an inner cannula lumen, a proximal end, an open distal end, and a cutting edge at the distal end, wherein when the motor rotates, the inner cannula reciprocates within the outer cannula lumen; a tissue collector in fluid communication with the inner cannula lumen; a cam disposed in the distal handpiece section, wherein the motor is operatively connected to the cam such that when the motor rotates, the cam rotates about a cam axis, and the inner cannula reciprocates within the outer cannula lumen, the cam defining a cam groove, the cam groove angled with respect to the cam axis; and a cam transfer spacing the inner cannula laterally from the distal housing longitudinal axis, wherein the cam transfer extends between a first end that engages the cam and a second end that engages the inner cannula, such that when the cam rotates, the cam transfer follows the cam groove such that the cam transfer reciprocates in a direction that is substantially parallel to the inner cannula longitudinal axis.