Patent ID: 8167819

Claim:
A biopsy needle assembly for engagement with carriages in a biopsy gun, comprising: a hollow outer needle having a proximal end and a distal end and defining a lumen therethrough, said outer needle defining an axis along the length of the needle; an inner needle disposed within said lumen, said inner needle having a proximal end and a distal end and defining a cavity adjacent said distal end for receiving a tissue sample; a first hub attached to said proximal end of said inner needle along said axis; a second hub attached to said proximal end of said outer needle along said axis; one of said first and second hubs including: a lower surface configured to engage a carriage of the biopsy gun; an upper surface offset above said lower surface; a first elongated track defined on said upper surface laterally offset relative to said axis, said first elongated track defining a first channel parallel to said axis and a stop surface at one end of said track; and a projection spaced apart from said stop surface to define a space therebetween, said space having a length; and an elongated pin having a first end, a second end and an arm projecting from said second end, said arm having a cross sectional dimension slightly less than said length, said pin disposed within and configured to slide within said first channel of said one of said first and second hubs, and said first end of said pin connected to the other of said first and second hubs to move therewith, said one of said first and second hubs and said pin being slidable relative to each other between a position in which said arm is positioned in said space and a position in which said arm is outside said space.