Patent ID: 8192369

Claim:
A biopsy device for the percutaneous removal of a specimen from a tissue mass, the biopsy device comprising: a housing defining an interior having an operational axis; a cannula carriage provided in the housing for reciprocal movement between an armed position and a fired position within the interior and having a cannula strike laterally offset from the operational axis in a first lateral direction; a stylet carriage provided in the housing for reciprocal movement between an armed position and a fired position within the interior and having a stylet strike laterally offset from the operational axis in a second lateral direction opposite the first lateral direction and proximal of the cannula strike when the cannula carriage and the stylet carriage are in the fired position; and a cocking element slidably mounted to the housing for movement between a first position and a second position to define an arming stroke, and having a catch integrally formed with a resilient shaft extending along the operational axis; wherein the catch, when the stylet and cannula carriages are in the fired positions, is configured to engage the cannula strike, upon a first arming stroke, to deflect the resilient shaft from the operational axis in the first lateral direction such that the catch clears the stylet strike and moves the cannula carriage to the armed position.