JOHN D OBRIEN
Broker in Winchester, MA
License number
Massachusetts 64615
Issued Date
May 1, 1985
Expiration Date
Sep 20, 1999
Type
Salesperson
Address
Address
Winchester, MA 01890
Professional information
Making Closed End Tubes For Surgical Instruments
US Patent:
6742236, Jun 1, 2004
Filed:
Sep 20, 1999
Appl. No.:
09/399596
Inventors:
Ernest A. Dion - Danvers MA
Ronald A. Mayville - Newton MA
Joop F. Hoekstra - Medfield MA
John L. OBrien - Winchester MA
Ronald A. Mayville - Newton MA
Joop F. Hoekstra - Medfield MA
John L. OBrien - Winchester MA
Assignee:
Smith Nephew, Inc. - Memphis TN
International Classification:
B23P 1100
US Classification:
29434, 29558, 606171, 7237013
Abstract:
Techniques are described for making one-piece tubes for surgical instruments in which an inner tube that carries a cutting implement is disposed for movement within an outer tube having a cutting window that exposes the cutting implement to tissue. Swaging is performed to close an end of a tubular member that is to serve as either the inner tube or the outer tube. Other processing steps are also performed. For example, a selected amount of a protrusion formed by the swaging is cut away, the tube material is fused together at a seam formed by the swaging, and the closed distal end of the tubular member is formed into a selected shape. For example, the selected shape is rounded so that the distal end defines convex (e. g. , substantially hemispherical) interior and exterior distal surfaces. This renders the tube suitable for use in full-radius surgical instruments.