Patent ID: 7171839
Filing Date: 2007-02-06
Classification: A61B,B21D

Abstract:
1. A method of progressive die stamping manufacturing a biopsy forceps jaw comprising: (a) Cutting a sheet of metal into a strip; (b) Punching a series of guide holes into said strip of metal; (c) Defining in said strip of metal a shape larger than a pattern of said biopsy forceps jaw, said shape having a proximal end and a distal end whereby said shape is attached to said strip of metal; (d) Drawing said distal end of said shape into at least a part of a concave shaped cup portion of said biopsy jaws; (e) Cutting said pattern of said biopsy forceps jaw around said concave shaped cup portion to expose a cutting edge and exposed edges; (f) Folding and shaping said pattern to form a biopsy forceps jaw cup and at least one arm positioned relative to said biopsy forceps jaw cup; (g) Punching at least one pivot hole into said arm; (h) Coining said cutting edge to provide a hardened, sharp, cutting edge prior to folding and shaping said pattern; (i) Coining said pattern to chamfer said exposed edges prior to folding and shaping said pattern; (j) Punching at least one actuating hole at said distal end of said shape prior to drawing said concave shaped cup portion; (k) Calibrating said biopsy forceps jaw whereby said cutting edge is on a plane perpendicular to a plane of said arm; and (l) Cutting said biopsy forceps jaw cup off of said strip of metal in such a manner that any burr created during the cut off protrudes inward.