Patent ID: 7309317

Claim:
A biopsy instrument for use in a biopsy gun, comprising: a hollow outer needle having a proximal end and a distal end and defining a lumen therethrough; an inner needle slidably 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; said inner and outer needles slideable relative to one another between a first position wherein said distal end of said inner needle is retracted within said lumen so that said outer needle covers said cavity and a second position wherein said distal end of said inner needle is extended away from said outer needle to expose said cavity; a first hub attached to said proximal end of said inner needle; a second hub attached to said proximal end of said outer needle, said second hub having a track, a stop member projecting from a surface of said second hub adjacent said track, and a head projecting from said surface and spaced apart from said stop member 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 first end fixedly attached to said first hub and said pin slidingly engaged to said second hub within said track, said second hub slideable along said pin between a location near said first end and said second end where said arm is positioned in said space.