Patent ID: 8845548
Filing Date: 2014-09-30
Classification: A61B

Abstract:
1. A biopsy device, comprising: (a) a body; (b) a needle extending distally from the body; (c) a cutter configured for translation relative to the needle; (d) a first rotating member disposed within the body; (e) a second rotating member disposed within the body; and (f) a drive assembly disposed within the body and operable to simultaneously rotate the first and second rotating members; wherein the first and second rotating members each comprise a gear, wherein one gear of the first or second rotating member is larger than another gear of the first or second rotating member, wherein the differently sized gears are configured to cause the first and second rotating members to rotate at different rotational speeds when the first and second rotating members receive a single rotational input; wherein the first rotating member and the second rotating member are rotatable about a common axis; wherein the difference in rotational speeds of the first and second rotating members with both first and second members rotating is configured to provide translation of the cutter relative to the needle.