CA2503190A1 - Mandrel and method for making stents - Google Patents

Mandrel and method for making stents Download PDF

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Publication number
CA2503190A1
CA2503190A1 CA002503190A CA2503190A CA2503190A1 CA 2503190 A1 CA2503190 A1 CA 2503190A1 CA 002503190 A CA002503190 A CA 002503190A CA 2503190 A CA2503190 A CA 2503190A CA 2503190 A1 CA2503190 A1 CA 2503190A1
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CA
Canada
Prior art keywords
weld
long side
points
sheet
mandrel
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Granted
Application number
CA002503190A
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French (fr)
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CA2503190C (en
Inventor
Gregory Pinchasik
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Medinol Ltd
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Individual
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/10Spot welding; Stitch welding
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20Bonding
    • B23K26/21Bonding by welding
    • B23K26/22Spot welding
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91508Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other the meander having a difference in amplitude along the band
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91525Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • A61F2002/91541Adjacent bands are arranged out of phase
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/9155Adjacent bands being connected to each other
    • A61F2002/91558Adjacent bands being connected to each other connected peak to peak
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0058Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017Angular shapes
    • A61F2230/0023Angular shapes triangular
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028Shapes in the form of latin or greek characters
    • A61F2230/0034D-shaped

Abstract

A patterned sheet (13) having two long sides is wrapped around a mandrel (89 ). The mandrel is provided with at least one flat surface. The long sides of th e sheet are secured adjacent to the flat surface of the mandrel and points alo ng the long sides of the sheet are connected by laser welding or other connecti ng means. The laser beam (28) is directed substantially perpendicular to the welding plane of the points to be welded, even if the weld points do not all lie on a single line parallel to the mandrel's longitudinal axis.

Claims (27)

1. A mandrel for forming a stent, comprising:
a member having a first end, a second end and an external surface, the external surface provided with at least one substantially flat surface extending between the first end and the second end.
2. A mandrel for forming a stent, comprising:
a member having a first end and a second end and an external surface, the external surface provided with a plurality of substantially flat surfaces, each of the flat surfaces extending between the first end and the second end.
3. The mandrel of claims 1 or 2, wherein the mandrel is provided with three substantially flat surfaces.
4. A mandrel for forming a stent comprising:
a longitudinal member having a first end and second end, the longitudinal member having a substantially triangular cross-sectional shape, wherein each of the three sides defining the substantially triangular shape is a substantially flat surface that extends between the first end and the second end of the mandrel.
5. Apparatus comprising:
a) a mandrel having an axis, and having a substantially flat surface;
b) means to wrap a flat sheet provided with a stent pattern and having two opposed sides around the mandrel with the two opposed sides disposed on the flat surface; and c) means for joining directed substantially perpendicular to the substantially flat surface.
6. The apparatus of claim 5, wherein the means for joining is a welding apparatus.
7. The apparatus of claim 6, wherein the welding apparatus is a laser-welding apparatus.
8. The apparatus of claim 5, wherein the means for joining is a gluing apparatus.
9. apparatus for fabricating a stent, comprising:
a) a platform adapted to receive a sheet of material to be formed into the stent, the sheet having a longitudinal axis, a first major surface, a second major surface, a first long side, and a second long side, the first long side provided with a plurality of weld points and the second long side provided with a plurality of corresponding weld points; the weld, points disposed so that when the sheet is formed'into a substantially tubular shape, the weld points on the first long side are adjacent to the corresponding weld points on the second long side to form a plurality of weld point pairs and the weld point pairs are not disposed along a single common weld line parallel to the longitudinal axis of the stent;
b) a mandrel having an external surface and a first end and a second end defining a longitudinal axis, the mandrel sized to have an external perimeter about the longitudinal axis substantially equal to or less than the internal perimeter of the stent to be fabricated, the external surface provided with at least one substantially flat surface extending between the first end and the second end;
c) means for deforming the sheet against the external surface of the mandrel so that the sheet is deformed into a substantially tubular shape;
d) means for aligning and securing the weld points an the first long side and the corresponding weld points on the second long side to form the plurality of weld point pairs so that the weld points comprising each weld point pair can the joined; and e) means for joining the weld points on the first long side to the corresponding weld points on the second long side, the means for deforming and the means for aligning and securing adapted to secure the aligned weld points comprising the weld point pairs adjacent to the substantially flat surface of the mandrel so that the aligned weld points lie in a plane that is substantially perpendicular to the application of the means for joining.
10. The apparatus of claim 9, wherein the means for joining is a welding apparatus.
11. The apparatus of claim 10, wherein the welding apparatus is a laser-welding apparatus.
12. The apparatus of claim 9, wherein the means for joining is a gluing apparatus.
13. Apparatus for fabricating a stent, comprising:
a) a platform adapted to receive a sheet of material to be formed into the stent, the sheet having a longitudinal axis, a first major surface a second major surface, a first long side, and a second long side; the first long side provided with a plurality of weld points and the second long side provided with a plurality of corresponding weld points; the weld points disposed so that when the sheet is formed into a substantially tubular shape, the weld points on the first long side are adjacent to the corresponding weld points on the second long side to form a plurality of weld point pairs disposed on a plurality of weld lines;
b) a mandrel having an external surface and a first end and a second end defining a longitudinal axis the mandrel seed to have an external peri meter about the longitudinal axis substantially equal to or less than the internal perimeter of the stent to be fabricated, the external surface provided with at least one substantially flat surface extending between the first end and the second end;
c) means for deforming the sheet against the external surface of the mandrel so that the sheet is deformed into a substantially tubular shape;
d) means for aligning and securing the weld points on the first long side and the corresponding weld points on the second long side to form a plurality of weld point pairs so that the corresponding weld points comprising the weld point pairs can be joined; and e) means for joining the weld points on the first long side to the corresponding second weld points on the second long side, the means for deforming and the means for aligning and securing adapted to secure the aligned weld points adjacent to the substantially flat surface of the mandrel so that each of the aligned weld points comprising each of the weld point pairs disposed on each of the plurality of weld lines lies in a plane that is substantially perpendicular to the application of the means for joining.
14. The apparatus of claim 13, wherein the means for joining is a welding apparatus.
15. The apparatus of claim 14, wherein the welding apparatus is a laser-welding apparatus.
16. The apparatus of claim 13, wherein the means for joining is a gluing apparatus.
17. Apparatus for fabricating a stent, comprising:
a) a platform adapted to receive a sheet of material to be formed into the stent, the sheet of material having a longitudinal axis, a first major surface, a second major surface, a first long side, and a second long side, the first and second long sides substantially parallel to the longitudinal axis of the sheet; the first long side provided with. a plurality of first weld line weld points and a plurality of second weld line weld points and the second long side provided with a plurality of first weld line weld points and a plurality of second weld line weld points;
the weld points disposed so that when the sheet is formed into a substantially tubular shape the first weld line weld points on the first long side are adjacent to the corresponding first weld line weld points on the second long side to form a plurality of first weld line weld point pairs disposed on a first weld line having a longitudinal axis substantially parallel to the longitudinal axis of the sheet;
the weld points disposed so that when the stent is formed into a substantially tubular shape the second weld line weld points on the first long side are adjacent to the corresponding second weld line weld points on the second long side to form a plurality of second weld line weld point pairs disposed on a second weld line having a longitudinal axis that is substantially parallel to the longitudinal axis of sheet;
b) a mandrel having an. external surface and a first end and a second end defining a longitudinal axis, the external surface provided with at least one substantially flat surface extending between the first end and the second end;
c) means for deforming the sheet against the external surface of the mandrel so that the sheet is deformed into a substantially tubular shape, the means for deforming adapted so that the first long side and the second long side remain substantially parallel to each other when the sheet is deformed into the tubular shape;
d) means for aligning and securing the first weld lines weld points on the first long side to the corresponding first weld line weld points on the second long side and for aligning and securing the second weld line weld points on the first long side to the corresponding second weld line weld points on the second long side so that the weld points.
comprising each weld point pair can be connected;
and e) means for joining the aligned first weld line weld points of the first weld line and the aligned second weld line weld points of the second weld line, the means for deforming and the means for aligning and securing adapted to secure the aligned first weld points and the aligned second weld points adjacent to the substantially flat surface of the mandrel so than the aligned weld points of each weld point pair disposed on the first and second weld lines lie in a plane that is substantially perpendicular to the application of the means for joining.
18. The apparatus of claim 17, wherein the means for joining is a welding apparatus.
19. The apparatus of claim 18, wherein the welding apparatus is a laser-welding apparatus.
20. The apparatus of claim 17, wherein the means for joining is a gluing apparatus.
21. A method comprising:
a) wrapping a sheet provided with a stent pattern and having two opposed sides about a mandrel having an axis, and having a flat surface, so as to cause the two opposing sides to meet adjacent to the flat surface; and b) utilizing a means for joining to join the two opposing sides at least at two points lying on lines on the surface parallel to the axis, but laterally displaced from each other on the flat surface, directing the means for joining substantially perpendicular to the flat surface.
22. A method comprising:
a) wrapping a sheet provided with a stent pattern and having two opposed sides cut a mandrel having an axis, and having a flat surface, so as to cause the two opposing sides to meet adjacent to the flat surface; and b) utilizing a means for joining to join the two opposing sides at least at two points that do not lie on a single line parallel to the mandrel's longitudinal axis, directing the means for joining substantially perpendicular to the flat surface.
23. The method according to claims 21 or 22, wherein the joining step comprises welding.
24. The method according to claim 23, wherein the welding step is laser welding.
25. The method of claims 21 or 22, wherein the joining step comprises gluing.
26. The method according to claim 21, comprising joining a plurality of points located on each of said lines laterally displaced from each other.
27. A method of making a stent, comprising the steps of, a) utilizing a sheet of material to be formed into the stent, the sheet having a longitudinal axis, a first major surface, a second major surface, a first long side, and a second long side, the first long side provided with a plurality of weld points and the second long side provided with a plurality of corresponding weld points; the weld points disposed so that when the sheet is formed into a substantially tubular shape, the weld points on the first long side are adjacent to the corresponding weld points on the second long side to fore a plurality of weld point pairs and the weld point pairs are not aligned along a common weld line parallel to the longitudinal axis of the sheet;
b) deforming the sheet against the external surface of a mandrel so that the sheet is deformed into a substantially tubular shape; the mandrel having an external surface and a first end and a second end defining a longitudinal axis, the mandrel sized to hay a an external perimeter about the longitudinal axis substantially equal to or less than the internal perimeter of the stent to be fabricated, the external surface provided with at least one substantially flat surface extending between the first end and the second end;
e) aligning and securing adjacent the substantially flat surface of the mandrel each of the weld points so that the weld points lie in substantially the same plane that is substantially parallel to the substantially flat surface of the mandrel, and so that the weld points on the first long side are adjacent to the corresponding weld points on the second long side to form a plurality of weld point pairs that are not disposed only along a single common weld line; and d) joining the corresponding weld points comprising each weld point pair utilizing a means for joining, the means for joining directed substantially perpendicular to the plane in which the weld points lie.

23. The method or claim 27, wherein the joining step comprises welding.

29. The method of claim 28, wherein the welding step is laser welding.

30. The method of clam 27, wherein the joining step comprises gluing.

31. A method of making a stent, comprising the steps of a) utilizing a sheet of material to be carried into the stent, the sheet having a longitudinal axis, a first major surface, a second major surface, a first long side and a second long side, the first long side provided with a plurality of weld points and the second long side provided with a plurality of corresponding weld points; the weld points disposed so that when the stent is formed into a substantially tubular shape, the weld points on the first long side are adjacent to the corresponding weld points on the second long side to form a plurality of weld point pairs disposed on a plurality of weld lines;
b) deforming the sheet against the external surface of a mandrel so that the sheet is deformed into a substantially tubular shape; the mandrel having an external surface and a first end and a second end defining a longitudinal axis, the mandrel, sized to have an external perimeter about the longitudinal axis substantially equal to.or less than the internal perimeter of the stent to be fabricated, the external surface provided with at least one substantially flat surface extending between the first end and the second end;
c) aligning and securing adjacent to the substantially flat surface of the mandrel each of the plurality of weld points to form a plurality of weld point pairs disposed along each of the plurality of weld lines so that the weld points disposed on each of the plurality of weld lines lies in substantially the same plane that is substantially parallel to the substantially flat surface of the mandrel, and so that the weld points on the first long side are adjacent to the cor responding weld points on the second long side to form a plurality of weld point pairs disposed on a plurality of weld lines; and d) joining the corresponding weld points comprising each weld point pair disposed on the plurality of weld lines utilizing a means for joining, the means for joining directed substantially perpendicular to the plane in which the weld points lie.

32. The method of claim 31, wherein the joining step comprises welding.

33. The method of claim 32, wherein the welding step is laser welding.

34. The method of claim 31, wherein the joining step comprises gluing.

35. p method of making a stent, comprising the steps of:
a) utilizing a sheet of material to be formed into the stent, the sheet having a longitudinal axis, a first major surface, a second major surface, a first long side, and a second long side, the first and second long sides substantially parallel to the longitudinal axis of the sheet;
the first long side provided with a plurality of first weld line weld points and a plurality of second weld line weld points and the second long side provided with a plurality of first weld line weld points and a plurality of second weld line weld points; the weld points disposed so that when the sheet is formed into a substantially tubular shape, the first weld line weld points on the first long side are adjacent to the corresponding first weld line weld points on the second long side to form a plurality of first weld line weld point pairs disposed on a first weld line haying a longitudinal axis substantially parallel to the longitudinal axis of the sheet;
the weld points disposed so that when the stent is formed into a substantially tubular shape the second weld line weld points on the first long side are adjacent to the corresponding second weld line weld points on the second long side to form a plurality of second weld line weld point pairs disposed on a second weld line having a longitudinal axis that is substantially parallel to the longitudinal axis or the sheet;
b) deforming the sheet against the external surface of a mandrel so that the sheet is deformed into a substantially tubular shape; the mandrel having an external surface and a first end and a second end defining a longitudinal axis, the mandrel sized to have an external perimeter about the longitudinal axis substantially equal to or less than the intern al perimeter of the stent to be fabricated, the external surface provided with at least one substantially flat surface extending between the first end and the second end;
c) aligning and securing adjacent to the substantially flat surface of the mandrel the first and second weld points so that so that the first weld line weld points on the first long side are adjacent to the corresponding first weld line weld points on the second long side to form a plurality of first weld line weld point pairs disposed on first weld line having a longitudinal axis substantially parallel to the longitudinal axis of the sheet; and so that the second weld line weld points on the first long side are adjacent to the corresponding second weld line weld points on the second long side to form a plurality of second weld line weld point pairs disposed on a second weld line having a longitudinal axis that is substantially parallel to the longitudinal axis of the sheet; and so that the first and second weld points comprising the weld point pairs disposed on the first and second weld lines lie in substantially the same plane that is substantially parallel to the substantially flat surface of the mandrel; and d) joining the first weld points comprising each of the first weld point pairs disposed on the first weld line and connecting the second weld points comprising each of the second weld point pairs disposed on the second weld line utilizing a means for joining, the means for joining directed substantially perpendicular to the plane in which the first and second weld points lie.

36. The method of claim 35, wherein the joining step comprises welding.

37. The method of claim 36, wherein the welding step is laser welding.

38. The method of claim 35, wherein the joining step comprises gluing.

39. The apparatus of any of claims 1, 2, 3, 4, 5, 9, 13, or 17, wherein the substantially flat surface of the mandrel is provided with at least one void.

40. The apparatus of any of claims 1, 2, 3, 4, 5, 9, 13, or 17, wherein the substantially flat surface of the mandrel is provided with at least one groove having a longitudinal axis.

41. The apparatus of claim 40, wherein the longitudinal axis of the groove is substantially parallel to the longitudinal axis of the mandrel.

42. The apparatus of clams 9, 13, or 17, wherein the means for deforming and the means for aligning and securing are further adapted to provide a substantially v-shaped notch between the weld points when the weld points are aligned and secured adjacent to the substantially flat surface of the mandrel.

43. The apparatus of claims 9, 13, or 17, wherein the first and second long sides of the flat sheet are substantially parallel to the longitudinal axis of the sheet.

44. The apparatus of claim 43, wherein the means for deforming is adapted so that the first long side and the second long side remain substantially parallel to each other when the sheet is deformed into the tubular shape.

45. The method of claims 22, 31, or 35, further comprising the step of providing a substantially v-shaped notch between the weld paints prior to carrying out step d).

46. The method of claim 45, wherein the v-shaped notch is provided during step c).

47. The method of claims 21, 22, 27, 31, or 35, further comprising the step of providing the sheet with first and second long sides that are substantially parallel to the longitudinal axis of the sheet.

48. The method of claim 47, further comprising the step of aligning the first long side and the second long side so that the first long side and the second long side remain substantially parallel to each other when the sheet is deformed into the tubular shape.

49. The apparatus of claims 5, 9, 13, or 17, wherein the sheet is comprised of a material selected from the group consisting of metals and plastics.

50. The apparatus of claim 49, wherein the metal is selected from the group consisting of stainless steel and nickel-titanium alloys.

51. The method of claims 21, 22, 27, 31, or 35, wherein the sheet is comprised of a material selected from the group consisting of metals and plastics.

52. The method of claim 51, wherein the metal is selected from the group consisting or stainless steel, and nickel-titanium alloys.

53. The apparatus of claim 5, wherein the means for joining is supported for movements in directions parallel to and orthogonal to the axis of the mandrel to permit joining at points which are laterally displaced from each other on the substantially flat surface.

54. A method comprising:
a) wrapping a sheet provided with a stent pattern and having two opposed sides about a mandrel having an axis, and having a flat surface, so as to cause the two opposing sides to meet adjacent to the flat surface; and b) utilizing laser welding to join the two opposing sides at least at two points lying on lines on the surface parallel to the axis, but laterally displaced from each other on the flat surface, directing the laser beam substantially perpendicular to the flat surface.

55 . A method comprising:
a) wrapping a sheet provided with a scent pattern and having two opposed sides about a mandrel having an axis, and having a flat surface, so as to cause the two opposing sides to meet adjacent to the flat surface; and b) utilizing laser welding to join the two opposing sides at least at two points that do not lie on a single line parallel to the mandrel's longitudinal axis, directing the laser beam substantially perpendicular to the flat surface.

56. The apparatus of claims 6, 10, 14, or 18, wherein the welding apparatus is selected from the group consisting of spot welders and arc welders.

57. The method of claims 23, 28, 32, or 36, wherein the welding step is carried out using a welding method selected from the group consisting of spot welding and arc welding.

58. The mandrel according to any of claims 1-4 substantially as described hereinabove.

59. The mandrel according to any of claims 1-4 substantially as illustrated in any of the drawings.

60. The apparatus according to any of claims 5-20,39-44,49,50,53,56 substantially as described hereinabove.

61. The apparatus according to any of claims 5-20,39-44,49,50,53,56 substantially as illustrated in any of the drawings.

62. The method according to any of claims 21-38,45-48,51,52,54,55,57 substantially as described hereinabove.

63. The method according to any of claims 21-38,45-48,51,52,54,55,57 substantially as illustrated in any or the drawings.
CA2503190A 2002-10-25 2003-10-23 Mandrel and method for making stents Expired - Lifetime CA2503190C (en)

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US10/280,729 US6821293B2 (en) 2002-10-25 2002-10-25 Mandrel and method for making stents
US10/280,729 2002-10-25
PCT/IL2003/000877 WO2004037479A1 (en) 2002-10-25 2003-10-23 Mandrel and method for making stents

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EP (2) EP1560676B1 (en)
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US20040079737A1 (en) 2004-04-29
EP1886644A2 (en) 2008-02-13
EP1560676A1 (en) 2005-08-10
WO2004037479A1 (en) 2004-05-06
AU2003274666A1 (en) 2004-05-13
JP4373921B2 (en) 2009-11-25
EP1886644A3 (en) 2009-06-03
DE60326628D1 (en) 2009-04-23
JP2006503636A (en) 2006-02-02
AU2003274666B2 (en) 2008-10-23
US6821293B2 (en) 2004-11-23
EP1560676B1 (en) 2009-03-11
AU2003274666C1 (en) 2009-04-02
EP1886644B1 (en) 2011-12-07
EP1560676A4 (en) 2006-11-02

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