Patent ID: 8657841

Claim:
A tissue removal device, comprising: a handpiece housing a motor and a cam along a first longitudinal axis, wherein the motor is operatively connected to the cam such that when the motor rotates, the cam rotates; an outer cannula having an outer cannula lumen, an outer cannula proximal end, an outer cannula distal end, and an outer cannula opening adjacent the outer cannula distal end, wherein the opening defines a cutting edge for severing tissue, wherein the outer cannula is arranged along a second longitudinal axis that is axially offset from the first longitudinal axis; an inner cannula disposed in the outer cannula lumen and reciprocable within the outer cannula lumen along the second longitudinal axis, the inner cannula having an inner cannula lumen, an inner proximal end, an open inner distal end, a cutting edge at the inner distal end, a living hinge, a cutting section, and a body section, with the hinge being located between the cutting section and the body section, wherein the cutting section is pivotable when the inner cannula reciprocates within the outer lumen, wherein the inner cannula and the outer cannula are configured to define an annular space between the inner cannula and the outer cannula; a ball bearing engaging both the cam transfer and a groove in the cam; and an inner cannula stop position control system comprising an inner cannula position sensor and a motor control unit.