|Número de publicación||US3835912 A|
|Tipo de publicación||Concesión|
|Fecha de publicación||17 Sep 1974|
|Fecha de presentación||25 Jun 1973|
|Fecha de prioridad||25 Jun 1973|
|Número de publicación||US 3835912 A, US 3835912A, US-A-3835912, US3835912 A, US3835912A|
|Inventores||P Kristensen, W Simon|
|Cesionario original||S K S Ltd|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (4), Citada por (60), Clasificaciones (19)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
if warm KR 3,835,913 United States Patent 1 [111 3,835,912 Kristensen et a1. Sept. 17, 1974  METHOD OF JOINING A FILAMENT TO A 3,443,451 5/1969 Zieber, Jr. 29/4744 x M TAL OD 3,534,740 10/1970 Thompson r 128/339 3,611,551 10/1971 Shave er al. 163/5 X  Inventors: Paul A. Kristensen, St. James;
William F. Simon, Duluth, both of Primary ExaminerRichard J. Herbst 73 Assignee: S.K.S. Limited, Barbados, British Assistant E-wminervictor D1 Palma W I di Attorney, Agent, or Firm-Thomas G. Devme  Filed: June 25, 1973  Appl. N0.: 373,399
 ABSTRACT  US. Cl 163/5, 29/471.7, 29/474.4,
123/339 219 121 LM A metal tube is butted against a metal rod. The rod 51 Int. Cl 321g 3/18 and tube are welded together using a laser energy  Field of Search 29/47l.1, 471.7, 474.4; SOUTCB- A filament is inserted into the tube and 219/121 1 3/1 5; 12 339 cured therein. The rod may then be sharpened to serve as a needle.
 References Cited UNITED STATES PATENTS 12 Claims, 4 Drawing Figures 2,743,505 5/1956 Hill 29/474.4 X
PAIENIEB sm mu FROM LASER METHOD OF JOINING A FILAMENT TO A METAL ROD BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to attaching a filament to a small, metal rod. Specifically, it deals with the problem of securing a filament to a needle without having to pass the filament through an eye in the needle.
2. Description of the Prior Art Prior to this invention, needles of this type, commonly referred to in the trade as swage or suture needles to differentiate them from the eyed type, consisted of two main classes generally known in the trade as the channel type and the drill end or seamless type.
The channel type has a groove struck at the extremity of the needle, the end opposite the point. Raised triangular protrusions or corrugations extend across the bottom of the groove and after the filament has been inserted into the groove, the side walls of the groove are crimped or swaged around the filament, thereby effecting a gripping action on the filament by the corrugations. In the channel type, it is difficult to form a cylindrical shape at the channel in the end section to a smooth tight closure because of metal flow characteristics and shape of the groove. If this channel type needle is to be used as a surgical needle, then metal flaking or burrs caused by metal flow may leave a residue in the living tissue through which the surgical needle passes. Furthermore, packing fluids'could be carried over to the tissue to cause irritation, and sharp edges along the channel clip-off walls as well as the corrugation could fracture the filament (suture)during the closing of the channel or in the use of the needle. Also, such a needle requires cold working to attach the filament. The channel end must be annealed after heat treatment of the needle to allow the metal to flow without cracking severely, resulting in a weak wall and therefore poor gripping force, a non-uniform heat treatment or a soft end which could bend excessively during use.
The drill end type is an improvement over the channel type in that the tapped hole, having radial protrusions, located at the extremity of the needle at the end opposite the point, is crimped orswaged around the filament resulting in a stronger one piece, seamless wall and a better gripping action. However, this type of needle requires minimum size drilling and tapping to relatively close tolerance diameters.
Another type needle has a hole drilled at the end opposite the pointed end and then has the filament inserted, together with a' bonding agent to cement the filament in place. This type does not require the minimum tolerances of the type having radial protrusions and it does not cause metal flaking resulting from the crimping action. Both of these drill end types have the disadvantage of requiring the needle to be drilled.
Applicants invention solves the above problem by using commercially available stainless steel hypodermic stock for welding to a stainless steel rod, using a laser as the means of weldingThe hypodermic stock can either be crimped against the filament which has been inserted, or a bonding agent can be used to secure the filament within the hypodermic stock. The disadvantageous step of drilling a bore .into the needleis eliminated.
BRIEF SUMMARY OF THE INVENTION A filament is connected to a small, metal rod through a process wherein a section of metal tube is attached to a metal rod of a diameter approximating that of the tube, the welding being accomplished using a laser. The filament is subsequently secured within the tube either by crimping or by cementing the filament to the inside wall. The rod may be sharpened and configured as desired. Use of the finished article is ideally suited for medical purposes. That is, if the rod is stainless steel, the tube is stainless steel hypodermic needle stock, and the filament is suture material, the combination is excellent to serve as a surgical needle and suture. Fish hook assemblies and common sewing needle assemblies are other applications which are obvious but certainly not limiting to the many possibilities to which this invention lends itself. The welding step, using the laser, enables fast and efficient welding without having to move the joint to be welded.
It is therefore an object of this invention to provide an improved method for securing a filament to a metal rod.
It is another object of this invention to provide a method of securing a metal tube to a metal rod and then affixing a filament to the metal tube.
It is also an object of this invention to provide an improved means of welding a metal tube to a metal rod.
These and other objects will be made evident in the detailed description that follows.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates the metal tube and metal rod in place with the filament inserted into the tube.
FIG. 2 illustrates one embodiment of welding a metal tube to a metal rod using a laser.
FIG. 3 illustrates another embodiment of welding a metal rod to a metal tube using a laser.
,FIG. 4 illustrates a sharpened and shaped metal rod with a filament attached.
DETAILED DESCRIPTION OF THE INVENTION Referring first to FIG. 1, metal rod 13 is shown butted up against metal tube 11 forming a junction 16 therebetween. An area 16 surrounding the junction 15 is shown upon which light energy from a laser may be applied. The tube 11 has an inside bore 12 into which filament 14 is inserted. Filament 14 may be secured by crimping or by being cemented in place.
FIG. 4 shows rod 13 having been curved and having been sharpened to a point 17. FIG. 4 illustrates a typical surgical needle having a filament (suture) 14 attached thereto. The needle could, of course, be straight or shaped as desired for the particular application.
MODE OF OPERATION FIG. 2 diagrammatically illustrates one method of using a laser to weld metal rod 13 to metal tube 11. A laser beam 52 from a laser (not shown) is directed to a beam splitter 51. Beam splitters are well known and simply reflect some of the incoming light and permit some of the incoming light to pass through. Light beams 54 and are reflected while light beam 53 passes through beam splitter 51. Light beams 54 and 55 are reflected by mirrors 57 and 56, respectively. Light beam 54 is split into beams 61 and 62 by beam splitter 60, light beam 62 impinging on surrounding area 16. Light beam 55 is reflected from mirror 67 to also impinge on surrounding area 16. Light beam 61 is reflected by mirror 63 and again by mirror 65 to impinge on surrounding area 16. Light beam 53, passing through beam splitter 51 also impinges on area 16. Thus, area 16 is subjected to a number of light beams of high energy originating from a laser. By using different configurations of beam splitters and mirrors, the surrounding area 16 could obviously be attacked by more or less light beams at varied angles.
FIG. 3 diagrammatically illustrates another embodiment of the method of welding metal tube 11 to metal rod 13. Laser beam 52 from a laser (not shown) enters lens 81 and is broadened into light beam 82 having a diameter of 2r. Light beam 82 is directed to conical mirror 83 which forms light disc 84 having a thickness r. Light disc 84 is reflected from the inside surface of conical mirror 85 forming hollow cylinder 86 having a wall 87 of thickness r. Hollow beam 86 is reflected by the inside surface of conical mirror 88 forming light disc 89 having a thickness r. Junction between metal tube 11 and metal rod 13 is illustrated within thickness r so that the light energy of light disc 89 is applied to surrounding area 16. The light energy is thereby applied uniformly around junction 15.
FIG. 4 is a resultant structure from the steps of butting tube 11 against rod 13, welding tube 11 to rod 13 by applying light energy from a laser, inserting filament 14 into tube 11 and securing filament 14 within tube 11. In the preferred embodiment, the tube is of hypodermic stock, is stainless steel and may vary in diameter from approximately 0.01 inches to 0.05 inches. The metal rod is stainless steel and may also vary from 0.01 inches to 0.05 inches. When the resultant structure is intended for medical purposes, the filament 14 is suture material. Those having skill in this art appreciate that the dimensions and materials are illustrative only and are not limiting to the scope and intent of this invention.
1. The method of joining a filament to a metal rod via a metal tube, using a laser energy source, comprising the steps of:
a. butting the tube against the rod;
b. welding the'tube to the rod by applying light from the laser energy source to an area surrounding the junction between the tube and the rod;
0. inserting the filament into the tube; and
d. securing the filament within the tube.
2. The method of claim 1 wherein the step of welding further comprises:
i. providing a beam of laser light from the laser energy source;
ii. splitting the beam of laser light into a plurality of light beams; and
iii. directing each of the plurality of light beams to a predetermined point on the area surrounding the junction between the tube and the rod.
3. The method of claim 2 wherein the step of splitting.
the beam of laser light further comprises applying the beam to a beam splitter, and the step of directing the plurality of light beams further comprises reflecting at least some of the plurality of light beams from reflective surfaces to predetermined points on the surrounding area.
4. The method of claim 3 wherein the step of securing the filament further comprises cementing the filament within the tube.
5. The method of claim 3 wherein the step of securing the filament further comprises crimping the tube against the filament.
6. The method of claim 1 wherein the step of welding further comprises:
i. providing a beam of laser light from the laser energy source;
ii. converting the beam of laser light into a disc of light; and
iii. positioning the disc of light to form a ring of light converging on the junction of the tube and the rod.
7. The method of claim 6 wherein the step of converting the beam of light further comprises broadening the beam of laser light to a beam of light having a diameter of Zr, and applying the broadened beam to a conical reflective surface to provide the disc of light having a thickness of r.
8. The method of claim 7 wherein the step of positioning the disc of light further comprises translating the disc into a hollow beam having a wall thickness of r by reflecting the disc from a first inside, conical reflective surface, and re-translating the hollow beam into a disc of light converging on the junction, having a thickness of r, by reflecting the hollow beam from a second, inside, reflective conical surface.
9. The method of claim 6 wherein the step of securing the filament further comprises cementing the filament within the tube.
10. The method of claim 6 wherein the step of securing the filament further comprises crimping the tube against the filament.
11. The method of claim 8 wherein the step of securing the filament further comprises cementing the filament within the tube.
12. The method of claim 8 wherein the step of securing the filament further comprises crimping the tube
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US2743505 *||14 Abr 1951||1 May 1956||Int Standard Electric Corp||Joints for coaxial cable|
|US3443451 *||18 Ago 1966||13 May 1969||Teleflex Inc||Motion transmitting core element and method for making same|
|US3534740 *||17 Ago 1967||20 Oct 1970||Ethicon Inc||Spandex suture needle combination|
|US3611551 *||25 Ago 1969||12 Oct 1971||Deknatel Inc||Method for attaching suture and needle|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US4069080 *||11 Jun 1976||17 Ene 1978||W. R. Grace & Co.||Method and apparatus of bonding superposed sheets of polymeric material in a linear weld|
|US4201618 *||21 Jul 1978||6 May 1980||The United States Of America As Represented By The Secretary Of The Navy||Apparatus for curing adhesively joined fiber optic elements|
|US4224096 *||25 Mar 1976||23 Sep 1980||W. R. Grace & Co.||Laser sealing of thermoplastic material|
|US4700043 *||9 Dic 1986||13 Oct 1987||Matsutani Seisakusho Co., Ltd.||Method of forming bore in eyeless operating needle|
|US4832025 *||30 Jul 1987||23 May 1989||American Cyanamid Company||Thermoplastic surgical suture with a melt fused length|
|US4922904 *||8 Jun 1989||8 May 1990||Keisei Medical Industrial Company Limited||Apparatus for connecting thread to surgical needle|
|US4935029 *||17 Jun 1988||19 Jun 1990||Matsutani Seisakusho Co., Ltd.||Surgical needle|
|US4976727 *||13 Dic 1989||11 Dic 1990||Matsutani Seisakusho Co., Ltd.||Surgical needle|
|US5001323 *||8 Dic 1989||19 Mar 1991||Matsutani Seisakusho Co., Ltd.||Method and apparatus for manufacturing surgical needle|
|US5041128 *||4 Jun 1990||20 Ago 1991||United States Sirgical Corporation||Combined surgical needle-suture device possessing an integrated suture cut-off feature|
|US5051107 *||4 Jun 1990||24 Sep 1991||United States Surgical Corporation||Surgical needle-suture attachment for controlled suture release|
|US5059212 *||4 Jun 1990||22 Oct 1991||United States Surgical Corporation||Surgical needle-suture attachment for controlled separation of the needle from the suture|
|US5067959 *||4 Jun 1990||26 Nov 1991||United States Surgical Corporation||Surgical needle-suture attachement for controlled suture release|
|US5083008 *||31 Ago 1990||21 Ene 1992||Hazet-Werk Hermann Zerver Gmbh & Co. Kg||Method for the manufacture of die-forged or die-stamped workpieces|
|US5084063 *||4 Jun 1990||28 Ene 1992||United States Surgical Corporation||Surgical needle-suture attachment|
|US5089010 *||4 Jun 1990||18 Feb 1992||United States Surgical Corporation||Surgical needle-suture attachment possessing weakened suture segment for controlled suture release|
|US5089011 *||21 Jun 1990||18 Feb 1992||United States Surgical Corporation||Combined surgical needle-suture device possessing an integrated suture cut-off feature|
|US5089012 *||6 Sep 1990||18 Feb 1992||Ethicon, Inc.||Surgical suture, in particular for sternotomy closure|
|US5102418 *||27 Feb 1991||7 Abr 1992||United States Surgical Corporation||Method for attaching a surgical needle to a suture|
|US5116358 *||23 Jul 1990||26 May 1992||United States Surgical Corporation||Combined surgical needle-suture device possessing a controlled suture separation feature|
|US5123911 *||12 Nov 1991||23 Jun 1992||United States Surgical Corporation||Method for attaching a surgical needle to a suture|
|US5133738 *||21 Ago 1990||28 Jul 1992||United States Surgical Corporation||Combined surgical needle-spiroid braided suture device|
|US5139514 *||7 Oct 1991||18 Ago 1992||United States Surgical Corporation||Combined needle-suture device|
|US5156615 *||18 Nov 1991||20 Oct 1992||United States Surgical Corporation||Surgical needle-suture attachment for controlled suture release|
|US5226912 *||21 Ago 1990||13 Jul 1993||United States Surgical Corporation||Combined surgical needle-braided suture device|
|US5259845 *||3 Abr 1991||9 Nov 1993||United States Surgical Corporation||Surgical needle-suture attachment with a lubricated suture tip for controlled suture release|
|US5280674 *||12 Nov 1991||25 Ene 1994||United States Surgical Corporation||Apparatus for attaching a surgical needle to a suture|
|US5306288 *||29 Abr 1991||26 Abr 1994||United States Surgical Corporation||Combined surgical needle-suture device|
|US5403345 *||12 Oct 1993||4 Abr 1995||United States Surgical Corporation||Needle suture attachment|
|US5726422 *||10 May 1996||10 Mar 1998||Ethicon, Inc.||Apparatus with moving clamp for making surgical sutures, and method for using same|
|US5792181 *||10 May 1996||11 Ago 1998||Ethicon, Inc.||Surgical suture having a thermally formed tip, and apparatus and method for making same|
|US5813303 *||10 May 1996||29 Sep 1998||Ethicon, Inc.||Apparatus for cutting a surgical suture at two locations|
|US5855156 *||10 May 1996||5 Ene 1999||Ethicon, Inc.||Apparatus for cutting a surgical suture tip|
|US5891166 *||30 Oct 1996||6 Abr 1999||Ethicon, Inc.||Surgical suture having an ultrasonically formed tip, and apparatus and method for making same|
|US5975876 *||10 May 1996||2 Nov 1999||Ethicon, Inc.||Combined apparatus for heating and cutting a surgical suture tip|
|US6001121 *||14 Abr 1998||14 Dic 1999||Ethicon, Inc.||Surgical suture having a thermally formed tip, and apparatus and method for making same|
|US6035751 *||28 Abr 1998||14 Mar 2000||Ethicon, Inc.||Method for cutting a surgical suture at two locations|
|US6035916 *||26 Mar 1999||14 Mar 2000||Ethicon, Inc.||Surgical suture having an ultrasonically formed tip, and apparatus method for making same|
|US6126676 *||4 May 1999||3 Oct 2000||Ethicon, Inc.||Surgical tipping apparatus|
|US6306157||30 May 2000||23 Oct 2001||Ethicon, Inc.||Surgical tipping apparatus|
|US6730111||14 Ago 2001||4 May 2004||Semyon Shchervinsky||Surgical tipping apparatus|
|US7557325||5 Ago 2004||7 Jul 2009||Lasag Ag||Method for manufacturing a medical needle|
|US7862572||20 Sep 2005||4 Ene 2011||Endoevolution, Llc||Apparatus and method for minimally invasive suturing|
|US7976555||12 Jul 2011||Endoevolution, Llc||Apparatus and method for minimally invasive suturing|
|US7993354||9 Ago 2011||Endoevolution, Llc||Devices and methods for minimally invasive suturing|
|US8066737||29 Nov 2011||Endoevolution, Llc||Needle for suturing instrument|
|US8123764||20 Nov 2009||28 Feb 2012||Endoevolution, Llc||Apparatus and method for minimally invasive suturing|
|US8469973||17 Jul 2008||25 Jun 2013||Endoevolution, Llc||Apparatus and method for sternotomy closure|
|US8623048||3 Ago 2011||7 Ene 2014||Endoevolution, Llc||Suturing instrument|
|US8778102||16 Jun 2008||15 Jul 2014||Ethicon, Inc.||Post laser drilling stress relief of surgical needles made of refractory alloys|
|US8821519||30 Ene 2012||2 Sep 2014||Endoevolution, Llc||Apparatus and method for minimally invasive suturing|
|US20050049639 *||5 Ago 2004||3 Mar 2005||Adrian Fiechter||Method for manufacturing a medical needle|
|US20050216038 *||4 May 2005||29 Sep 2005||Suturtek Incorporated||Apparatus for surgical suturing with thread management|
|US20060069396 *||20 Sep 2005||30 Mar 2006||Suturtek Incorporated||Apparatus and method for minimally invasive suturing|
|US20080255590 *||1 Nov 2007||16 Oct 2008||Meade John C||Apparatus and method for minimally invasive suturing|
|US20090024145 *||17 Jul 2008||22 Ene 2009||Meade John C||Apparatus and method for sternotomy closure|
|US20100152751 *||20 Nov 2009||17 Jun 2010||Endoevolution, Llc||Apparatus and method for minimally invasive suturing|
|US20110315334 *||28 Sep 2009||29 Dic 2011||Katoh Kazuaki||Hole opening device and hole opening method for eyeless needle|
|US20140166225 *||2 Ago 2012||19 Jun 2014||Kabushiki Kaisha Iken Kougyo||Manufacturing method of an eyeless suture needle|
|EP1504829A1 *||5 Ago 2003||9 Feb 2005||Lasag Ag||Process of manufacturing a medical needle|
|Clasificación de EE.UU.||163/5, 606/226, 228/187, 228/903, 228/131, 219/121.64, 219/121.77|
|Clasificación internacional||B21G1/10, A61B17/06, B23K26/067|
|Clasificación cooperativa||B23K26/0621, Y10S228/903, B23K26/067, B21G1/10, A61B17/06004|
|Clasificación europea||B23K26/067, B21G1/10, A61B17/06A, B23K26/06A6|