Apparatus for creating formed elements used to make wound stents

• US 9,676,022 B2
• Filed: 12/16/2015
• Issued: 06/13/2017
• Est. Priority Date: 04/03/2012
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Ensign, Lance, Griswold, Erik
• Primary Examiner(s): Sullivan, Debra
• Application Number:
  US14/971,622
• Publication Number:
  US 20160114376A1
• Time in Patent Office: 545 Days
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: B21F 1/04 Undulating
• CPC Class Codes: B21F 45/008 of medical instruments, e.g. stents, corneal rings medical science A61

Abstract

A method for forming a wave form for a stent includes moving a first forming portion of a first forming member across an axis along which a formable material is provided in a first direction substantially perpendicular to the axis to engage and deform the formable material while engaging the formable material with a first forming portion of the second forming member. The method includes moving the first forming portion of the first forming member and the first forming portion of the second forming member across the axis in a second direction that is substantially opposite the first direction to draw and form the formable material over the first forming portion of the second forming member, disengaging the first forming member from the formable material, and rotating the first forming member to position a second forming portion of the first forming member to face the formable material.

Claims

1. A forming apparatus configured to form a wave form for a stent out of a formable material, the wave form comprising a plurality of substantially straight portions and a plurality of curved portions, the apparatus comprising:

a feeder constructed and arranged to receive a supply of the formable material and to provide the formable material along an axis;

a first forming member configured to be movable along two orthogonal axes and rotatable in a plane defined by the two orthogonal axes, the first forming member comprising a first forming portion and a second forming portion having a size different from the first forming portion, each of the first forming portion and the second forming portion configured to engage and deform the formable material;

a second forming member positioned on an opposite side of the axis relative to the first forming member, the second forming member configured to be movable along the two orthogonal axes and comprising a first forming portion configured to engage and deform the formable material; and

a controller in communication with the feeder, the first forming member, and the second forming member, the controller being configured to control movement of the first and second forming members to form the wave form.

2. The forming apparatus according to claim 1, further comprising a first actuator in communication with the controller and configured to move the first forming member, and a second actuator in communication with the controller and configured to move the second forming member.

3. The forming apparatus according to claim 2, further comprising a first motor configured to rotate the first forming member to locate the first forming portion or the second forming portion of the first forming member in a position facing the axis.

4. The forming apparatus according to claim 3, wherein the second forming member is configured to be rotatable, the second forming member further comprising a second forming portion configured to engage and deform the formable material.

5. The forming apparatus according to claim 4, further comprising a second motor configured to rotate the second forming member to locate the first forming portion or the second forming portion of the second forming member in a position facing the axis.

6. The forming apparatus according to claim 1, wherein the formable material is a wire.

7. The forming apparatus according to claim 1, wherein the formable material is a strip of material.