Tubular metal prosthesis and method of making it

• US 9,445,924 B2
• Filed: 07/10/2007
• Issued: 09/20/2016
• Est. Priority Date: 07/10/2006
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Wolf, Jaqueline
• Primary Examiner(s): Sevilla, Christian
• Assistant Examiner(s): Mathew, Seema
• Application Number:
  US12/373,116
• Publication Number:
  US 20100070018A1
• Time in Patent Office: 3,360 Days
• Field of Search: 623/1.11, 623/1.36, 623/1.15, 623/1.34
• US Class Current: 1/1
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91591 Locking connectors, e.g. using male-female connections
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2250/0096 Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: B23K 2103/08 Non-ferrous metals or alloys
• CPC Class Codes: B23K 2103/18 Dissimilar materials
• CPC Class Codes: B23K 2103/26 Alloys of Nickel and Cobalt and Chromium
• CPC Class Codes: B23K 31/02 relating to soldering or welding dip or wave soldering in the manufacture of printed circuits H05K3/34
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

For welding a polished component of one metal to a polished prosthesis of another metal, ramp surfaces are used, to compensate for loss of precise dimensions of the two components at the surfaces that face each other at the weld interface, during the respective polishing procedures for the two metals.

Claims

1. A tubular metal stent, comprising:

a stent body formed from a first material, including;

a first stent ring including struts connected by nodes positioned at a first end of the stent body,

a plurality of shanks extending axially away from nodes on the first stent ring along a longitudinal axis of the stent body,

each of the plurality of shanks having a head portion extending therefrom,

each head portion including first and second polished ramp surfaces converging and meeting at a point axially away from the stent body; and

a plurality of radiopaque markers formed from a second material different from the first material, each of the markers including an end recess having complementary polished third and fourth ramp surfaces that abut the polished first and second ramp surfaces when the head portion is inserted into the end recess, wherein the end recess of each of the radiopaque markers includes axially aligned edges parallel to the longitudinal axis of the stent body adjacent the polished third and fourth ramp surfaces.

2. The stent according to claim 1, further comprising a second stent ring including struts connected by nodes positioned at a second end of the stent body opposite the first end of the stent body.

3. The stent according to claim 2, further comprising a plurality of shanks extending axially away from nodes on the second stent ring along a longitudinal axis of the stent body, each of the plurality of shanks having a head portion extending therefrom.

4. The stent according to claim 3, wherein each head portion includes first and second polished ramp surfaces converging and meeting at a point axially away from the stent body.

5. The stent according to claim 1, wherein each of the radiopaque markers further comprises a cylindrical throughbore at an end of the recess.

6. The stent according to claim 1, wherein the head portion polished first and second ramp surfaces and end recess complementary polished third and fourth ramp surfaces have an arcuate shape.