Patent ID: 8052616

Claim:
A biopsy device, wherein the biopsy device comprises: (a) a cannula having a closed tip, the cannula defining an axis; (b) a cutter translatable relative to the cannula, along the axis defined by the cutter; (c) a probe body, wherein the cannula extends distally relative to the body; and (d) a cutter actuation assembly, wherein the cutter actuation assembly is operable to translate the cutter distally relative to the cannula along the axis defined by the cutter, wherein the cutter actuation assembly comprises: (i) a sleeve unitarily secured to the cutter, wherein the sleeve comprises: (A) a first portion having external threading, wherein the first portion extends along a first longitudinal region of the sleeve, and (B) a second portion having external flats, wherein the second portion extends along a second longitudinal region of the sleeve, and (ii) a nut member associated with the probe body, wherein the nut member has internal threading configured to engage the external threading of the sleeve, such that the cutter moves longitudinally upon rotation of the sleeve relative to the nut.