|Publication number||USRE42329 E1|
|Application number||US 11/639,356|
|Publication date||May 10, 2011|
|Filing date||Dec 14, 2006|
|Priority date||Jul 24, 2002|
|Also published as||US6830632, USRE44343|
|Publication number||11639356, 639356, US RE42329 E1, US RE42329E1, US-E1-RE42329, USRE42329 E1, USRE42329E1|
|Inventors||Charles E. Fuerstenau, Alan Belohlav|
|Original Assignee||Lucas-Milhaupt, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (97), Non-Patent Citations (14), Referenced by (1), Classifications (18), Legal Events (7) |
|External Links: USPTO, USPTO Assignment, Espacenet|
Flux cored preforms for brazing
US RE42329 E1
A wire preform suitable for use in brazing components to one another. The preform is made from a length of wire having a core of flux material, and a longitudinal seam or gap that extends over the length of the wire. The seam is formed so that when heated, the flux material flows from the core and out of the seam. The length of wire is in the form of a loop having a certain circumference so that when the preform is heated, the flux material disperses uniformly from the circumference of the preform for evenly treating the surface of a component on which the preform is placed. The length of wire may include a silver alloy.
1. A wire preform suitable for use in brazingjoining components to one another, comprising:
a length of wire having a core of a flux material, and a longitudinal seam or gap extending over the length of the wire wherein the seam is formed so that when heated, the flux material flows from the core and out of the seam of the wire; and
the length of wire is in thea form of a loop having a certain circumference so that when the preform is heated, flux material is dispersed uniformly from the circumference of the preformtherefrom for evenly treating a component surface on which the preform is disposed .
2. A wire preform according to claim 1, wherein the length of wire is formed from an elongate metal sheet, and the seam of the wire is defined by an inner edge portion of the sheet and a confronting outer edge portion of the sheet.
3. A wire preform according to claim 2, wherein the inner edge portion of the metal sheet is angled to be embedded in the flux material.
4. A wire preform according to claim 1, wherein the seam on the length of wire is on thean inner circumference of thea ring preform.
5. A wire preform according to claim 1, wherein the length of wire is preformed in a helical in formshape.
6. A wire preform according to claim 5, wherein the seam is on thea circumference of the preform.
7. A wire preform according to claim 1, wherein the wire has a diameter of between about 0.031 inch and about 0.125 inch.
8. A wire preform according to claim 1, wherein the length of wire comprises a silver alloy.
9. The wire of claim 1
, wherein the wire includes:
a rolled metal alloy sheet that defines an encasing perimeter that extends around the flux material of the core;
an inner angled edge portion of the sheet is embedded in the flux material and emerges from the core and the sheet to extend around the flux material; and
an outer edge portion of the sheet confronts the sheet proximate a location where the inner angled edge portion of the sheet emerges from the core, thereby forming a seam.
10. A wire according to claim 1, wherein the length of wire is in the form of a loop having a certain circumference to aid in dispersion of flux material from an inner circumference of the loop during brazing.
11. The wire of claim 10, wherein a laser aids with wire and flux formation.
12. The wire of claim 1, wherein the wire may be at least one of: an oval, a square, a multi-form helical loop; a braze ring; a helical shape having a circular cross-section; and a wire having a diameter between about 0.031 and about 0.125 inches.
13. The wire of claim 1, wherein when the wire reaches a brazing temperature between approximately 500 and approximately 1100 degrees F., flux is dispersed from the seam uniformly along a circumference of the wire.
14. The wire of claim 1
the length of wire is formed from a metal alloy sheet is formed into a U-shaped channel by a die;
the U-shaped channel is then passed through a trough by pulling the metal alloy sheet in a direction away from a dispensing apparatus;
wherein the flux material is a powdered flux material conveyed from a dispenser to fill the U-shaped channel;
the filled channel is passed out of the trough and through a die where the filled channel begins to close;
the metal alloy then passes through a die where the channel is closed and a butt seam is formed with opposing side edge portions of the channel;
a path for the flux material is created in a center of the core to aid in release of the flux material from the core;
the metal alloy then passes through another die where the metal alloy is formed to its final size diameter, while maintaining the path.
15. The wire of claim 14, wherein the wire is then packaged in spools.
16. The wire of claim 1, wherein the metal alloy sheet is an alloy of at least one of the following: aluminum-silicone; zinc-aluminum; copper zinc; silver-copper-zinc; silver-copper-zinc-tin; silver-copper-zinc-tin-nickel; silver-copper-zinc-nickel; silver-copper-tin; silver-copper-zinc-manganese-nickel; silver-copper-zinc-cadmium; and silver-copper-zinc-cadmium.
17. The wire of claim 14, wherein the metal alloy sheet is a narrow elongate strip coiled onto a spool to facilitate feeding of the metal alloy during a manufacturing process.
18. The wire of claim 1, wherein the wire is formed into a brazing wire having a size and a cross section of a desired shape and adopting a configuration that is complementary to various angles and sizes of surfaces to be brazed.
19. A brazing wire suitable for use in joining components to one another by brazing, comprising: a length of wire having a core of a flux material, and a longitudinal seam extending over the length of the wire wherein the seam is formed so that when the wire is heated, the flux material flows from the core and out of the seam of the wire and is dispersed uniformly therefrom for evenly treating components to be joined.
20. A wire suitable for use in joining components to one another by brazing, comprising:
a length of wire having a core of a flux material surrounded by a metal sheet, and a longitudinal seam extending along the length of the wire;
an inner angled edge portion of the sheet embedded in the flux material; and
an outer edge portion of the sheet confronting the inner angled portion of the sheet proximate a location where the inner angled edge portion of the sheet emerges from the core;
wherein the length of wire is in a form so that the seam is at an inner surface to aid in dispersion of flux material from the inner surface during heating;
wherein when the wire is heated, the flux material becomes molten and flows from the core and out of the seam of the wire;
wherein the molten flux material treats components in preparation for brazing.
FIELD OF THE INVENTION
Notice: More than one reissue application has been filed for the reissue of U.S. Pat. No. 6,830,632. The reissue applications are application Ser. Nos. 11/639,356 (the present application) and 12/834,506, which is a divisional application of U.S. application Ser. No. 11/639,356.
The present invention is directed to wire preforms for use in brazing.
DISCUSSION OF THE KNOWN ART
The brazing process typically involves joining ferrous and non-ferrous metal components together by positioning a brazing composition (such as an aluminum or silver-bearing metal alloy) and a flux adjacent to or between surfaces of the components to be joined, also known as the faying surfaces. To form the joint, the metal alloy and flux and the faying surfaces are heated to a temperature typically above the melting temperature of the alloy but below the melting temperature of the components to be joined. The alloy then melts, flows into the faying surfaces by capillary action and forms a seal that bonds the faying surfaces to one another.
A flux composition is often applied to the faying surfaces prior to brazing. In one application, a flux can be selected so that, when applied, it does one or more of the following: (1) removes oxides ordinarily present on the faying surfaces; (2) promotes the flow of the molten brazing alloy when heated to a temperature above its melting point; and (3) inhibits further oxide formation on the faying surfaces.
Flux cored wire ring preforms for brazing are known to have been made using an aluminum/silicon metal alloy. When heated, the alloy tends to men quickly enough to allow the core flux material to disperse fairly evenly and to enable satisfactory joints to be made. A known supplier of flux cored aluminum rin preforms is Omni Technologies Corporation.
Initial attempts to make silver alloy flux cored braze ring preforms using the same design principles as the aluminum preforms met with little initial success, however. Specifically, when the silver preforms were heated, the flux would not disperse evenly about the rings but, rather, would exit only from opposite ends of the silver wire forming the preforms before melting of the wire itself. As a result the braze joints were poor.
Accordingly, there is a need for a flux cored braze ring preform that, during heating, will disperse its core flux material evenly about the ring and onto a surface to be treated for brazing. In particular there is a need for such preforms made of silver alloys.
SUMMARY OF THE INVENTION
The present invention is directed to a flux cored brazing preform. A metal alloy is provided as an elongated thin sheet that is rolled around its long axis so as to encase a flux material. The rolled metal alloy sheet thus forms a flux cored wire having a longitudinal seam through which the flux material, when in a molten state, can exit.
The flux cored wire is then shaped into a braze ring preform which when heated allows the encased flux material to flow uniformly from the seam about the circumference of the preform, and to disperse evenly for treating a surface to be brazed.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawing:
FIG. 1 is a flow chart depicting a method of producing lengths of seamed brazing wire for shaping into brazing preforms according to the invention;
FIG. 2 is a cross sectional view of the brazing wire produced according to FIG. 1; and
FIGS. 3 to 5 show brazing preforms according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
In general, seamed flux cored brazing wires can be produced in accordance with procedures disclosed in French Patent Application no. 78 12546, published Nov. 25, 1977, and the seam area of the rolled sheet of metal may be modified as described herein. Other seamed flux cored brazing or welding wires are disclosed in, for example, U.S. Pat. No. 3,935,414 (Jan. 27, 1976); U.S. Pat. No. 1,629,748 (May 24, 19271); U.S. Pat. No. 4,379,811 (Apr. 12, 1983); U.S. Pat. No. 2,958,941 (Nov. 8, 1960); U.S. Pat. No. 4,396,822 (Aug. 2, 1983); U.S. Pat. No. 3,642,998 (Nov. 24, 1970); and Japanese Patent No. 63-303694 (Dec. 1, 1988).
As represented in FIG. 1, a narrow elongate strip of a metal alloy which may have been coiled onto a spool to facilitate the feeding thereof during the manufacturing process is formed into a U-shape channel by a first die. The U-shaped channel is passed through a trough by pulling the strip in a direction away from the spool or other dispensing apparatus. A powdered flux material is conveyed from a dispenser so as to drop from the dispenser into a trough which contains the U-shaped channel and to overfill the trough. A vibrating apparatus is typically employed to vibrate the trough in order to fill the strip. Optionally, lasers may be employed to ensure that the amount of flux that fills the metal alloy strip is sufficient to form an adequate brazed joint. The filled strip is passed out of the trough, though a second die where the filled channel begins to close. The wire then passes through a third die where the wire is closed and a butt seam is formed with the opposing side edge portions of the strip.
The wire then passes through a fourth die which forces an edge portion of the seam inward, e.g., about 0.005″ to 0.010″. This portion is maintained to about 45 degrees or less of the circumference of the wire, and leaves a gap between the opposed edge portions of strip. The inner edge portion extends toward the center of the cored wire, and the space between the edge portions contains flux. See FIG. 2, It is believed that this creates a path for the flux in the center of the core to release from the core.
The wire then passes through a fifth die where the wire is formed to its final size diameter, while maintaining the seam as described above. The flux cored wire is then packaged on spools and other suitable packaging systems.
The metal alloy strip can be any of the following alloys, among others: aluminum-silicone; zinc-aluminum; copper zinc; silver-copper-zinc; silver-copper-zinc-tin; silver copper-zinc-tin-nickel; silver-copper-zinc-nickel; silver-copper-tin; silver-copper-zinc-manganese-nickel; silver-copper-zinc-cadmium; and silver-copper-zinc-cadmium and nickel.
The flux-cored brazing wire formed as described above can subsequently be formed to into brazing preforms having any desired shape, such as a circle or oval. The preforms can then be placed between or adjacent to faying surfaces of components to be joined. The preforms and the faying surfaces are then heated to a suitable brazing temperature sufficient to melt the flux and the brazing alloy and, thus, bond the faying surfaces. The components are then cooled to solidify the brazing alloy and to secure the bond between the faying surfaces.
As shown in cross section in FIG. 2, the flux cored wire 10 includes the rolled metal alloy sheet 12 that defines an encasing perimeter that extends around the flux material 14 of the core. An inner angled edge portion 16 of the sheet 12 is embedded in the flux material 14. Moving counterclockwise in FIG. 2, the inner angled edge portion 16 of the sheet 12 emerges from the core and the sheet 12 extends around the flux material, and an outer edge portion 18 of the sheet 12 confronts the sheet 12 in the vicinity of the location where inner angled edge portion 16 of the sheet 12 emerges from the core, thereby forming a seam 20. Between the inner angled edge portion 16 and the outer edge portion of the sheet. There is a gap 22, in which a portion of the flux material 14 resides. Also, the inner angle edge portion 16 is surrounded by flux material
The metal alloy strip 12 may be formed or bowed into a brazing wire having a cross section of any desired shape and size. For example, the strip 12 may be rolled about its longitudinal axis in a substantially circular manner to form the wire 10 in FIG. 2. Once rolled, a length of the wire may be shaped, twisted or molded into various shapes, for example, adopting a configuration that is complementary to the various angles and sizes of the surfaces to be brazed. In specific embodiments, as illustrated in FIGS. 3 to 5, the wire can be formed into braze rings or helical loops having a circular cross-section, and further having a wire diameter between about 0.031 and 0.125 inches.
As mentioned, the seamed, flux cored brazing wire 10 may be manufactured by other techniques that are known in the art. For example, roll forming technology, alone and in combination with dies, can be employed to produce a cored wire. The cored wires may also be produced with a gap to allow flux dispersion from the seam.
Cored wire with a butt seam may also be produced, and due to other factors (like an oval, square or other shape of preforms made from the wire) the flux will be allowed to escape from the seam during brazing.
FIGS. 3 to 5 demonstrate flux distribution along the seam of flux-coated wire preforms made according to the invention. A copper coupon 40 is held in place by a clamping device 42 and suspended in the horizontal position. A flux-cored ring (preform 44 made from a length of seamed flux cored wire) is set upon the top surface of the copper coupon 40. Heat (from a propane, butane or similar torch) is applied to the bottom of the coupon.
When the flux-cored preform 44 reaches a temperature between 500 and 1100° F., flux can be seen dispersing from the wire seam uniformly along the full circumference of the preform 44 as shown in FIG. 4. Note the metal alloy strip is still in solid form, but the flux is being uniformly dispensed from the seam around the entire ring preform.
FIG. 5 shows a multi-turn helical loop preform 50 according to the invention, wherein the coupon 40 and the preform 50 are heated sufficient to cause molten flux material to disperse uniformly from a seam along the inner circumference of the preform, and the evenly over the top surface of the coupon 40.
While there have been described what are at present considered to be the preferred embodiments of this invention, it will be obvious to those skilled in the art that various changes and modifications may be made thin without departing from the true spirit and scope of the invention defined by the following claims.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US400869||Apr 5, 1886||Apr 2, 1889|| ||hodgson|
|US607504||Dec 20, 1897||Jul 19, 1898|| ||David crowther|
|US1629748||Jan 28, 1926||May 24, 1927||Stoody Co||Method of making welding rods and the resulting product|
|US1968618||Jan 5, 1932||Jul 31, 1934||Robert P Lewis||Driving axle|
|US2005189||Jul 10, 1933||Jun 18, 1935||Albert H Herr||Solder coupling|
|US2055276||Jun 10, 1935||Sep 22, 1936||Ici Ltd||Pipe joint or coupling|
|US2499641||Dec 22, 1945||Mar 7, 1950||Monroe Sherman||Brazing and hard soldering flux|
|US2565477||Apr 10, 1948||Aug 28, 1951||Dynoflow Solder Corp||Fluxed solder rod|
|US2927043||Feb 20, 1957||Mar 1, 1960||Solar Aircraft Co||Aluminum coating processes and compositions|
|US2958941||Feb 17, 1954||Nov 8, 1960||Air Reduction||Flux-filled brazing rod and method of brazing with same|
|US3033713||Apr 20, 1960||May 8, 1962||Air Reduction||Improved-stabilized brazing fluxes and binders|
|US3077131||Aug 3, 1961||Feb 12, 1963||Pittsburgh Steel Co||Die rolling apparatus for knurling wire|
|US3162551||Dec 7, 1962||Dec 22, 1964||Du Pont||Solder|
|US3198560||Mar 6, 1963||Aug 3, 1965||Parker Hannifin Corp||Brazed tube coupling|
|US3239125||Dec 20, 1963||Mar 8, 1966||Raychem Corp||Solder ring|
|US3290772||Feb 5, 1964||Dec 13, 1966||Gen Electric||Method of making a brazed joint|
|US3524998||Jan 26, 1968||Aug 18, 1970||Tektronix Inc||Resistive conversion device|
|US3542998||Jun 7, 1967||Nov 24, 1970||Air Reduction||Cored electrode for welding in air|
|US3610663||Apr 20, 1970||Oct 5, 1971||Aesoquip Corp||Brazed connection|
|US3619429||Jun 4, 1969||Nov 9, 1971||Yawata Welding Electrode Co||Method for the uniform extrusion coating of welding flux compositions|
|US3620869||Jul 16, 1969||Nov 16, 1971||Clevepak Corp||Method of making tubes|
|US3639721||Nov 13, 1970||Feb 1, 1972||Aeroquip Corp||Method of installing brazing rings|
|US3642998||Apr 22, 1970||Feb 15, 1972||Jennings Frederick A||Corrosion-inhibiting toolbox|
|US3695795||Mar 20, 1970||Oct 3, 1972||Conn Eng Assoc Corp||Production of powdered metal|
|US3703254||May 7, 1970||Nov 21, 1972||Ncr Co||Pre-fluxed solder powder|
|US3745644||Jul 28, 1971||Jul 17, 1973||Carrier Corp||Method for attaching solder rings to work pieces|
|US3935414||Oct 11, 1974||Jan 27, 1976||Unicore, Inc.||Automatic fixed position pipe welding|
|US3967036||Jul 11, 1974||Jun 29, 1976||The International Nickel Company, Inc.||Maraging stainless steel, manganese|
|US3980859||Aug 22, 1975||Sep 14, 1976||Huntington Alloys, Inc.||Cored wire junction|
|US4041274||Mar 5, 1976||Aug 9, 1977||The International Nickel Company, Inc.||Maraging stainless steel welding electrode|
|US4301211||Jul 31, 1979||Nov 17, 1981||Johnson, Matthey & Co., Limited||Brazing rod comprising an alloy core coated with a layer of elastomer containing a flux|
|US4379811||Apr 27, 1978||Apr 12, 1983||Esab Aktiebolag||Tubular filler wire for fusion welding|
|US4396822 *||Oct 16, 1981||Aug 2, 1983||Nissan Motor Co., Ltd.||Welding wire for automatic arc welding|
|US4447472||Sep 23, 1982||May 8, 1984||Essex Group, Inc.||Magnet wire coating method and article|
|US4493738||Feb 28, 1983||Jan 15, 1985||Johnson Matthey Plc||Brazing alloy composition|
|US4497849||Sep 26, 1983||Feb 5, 1985||Hughes Howard C||Process for polymer coating electrical conductors|
|US4571352||Jan 16, 1985||Feb 18, 1986||Sanden Corporation||Method for coating aluminum metal body with aluminum alloy brazing filler metal|
|US4587097||Jun 22, 1984||May 6, 1986||Allied Corporation||Homogeneous low melting temperature brazing filler metal for joining ferrous and non-ferrous alloys|
|US4624860||Oct 15, 1985||Nov 25, 1986||Imperial Clevite Inc.||Method of applying a coating to a metal substrate using brazing material and flux|
|US4762674||Nov 12, 1985||Aug 9, 1988||Westinghouse Electric Corp.||Brazing sleeve having ceramic flux band and method for applying same|
|US4785092||Mar 15, 1985||Nov 15, 1988||Sumitomo Light Metal Industrial, Ltd.||Silicon alloys with aluminum for high strength joints|
|US4800131||Dec 20, 1984||Jan 24, 1989||Alloy Rods Global, Inc.||Cored wire filler metals and a method for their manufacture|
|US4831701||Feb 12, 1986||May 23, 1989||Sanden Corporation||Applying zinc overcoating heating to cause diffusion|
|US4901909||Jun 27, 1989||Feb 20, 1990||Fusion Incorporated||Blend of aluminum and potassium fluoride with cesium and(or) rubidium chloride|
|US5098010||Sep 28, 1987||Mar 24, 1992||Carmichael Arthur O||Process using protective flux coatings for delaying joining and soldering operations|
|US5175411||Aug 23, 1991||Dec 29, 1992||Westinghouse Electric Corp.||In a steam turbine|
|US5184767||Dec 31, 1991||Feb 9, 1993||Compaq Computer Corporation||Non-wicking solder preform|
|US5280971||May 4, 1993||Jan 25, 1994||Showa Aluminum Corporation||Tubular body having pipe joint member attached thereto with brazing ring|
|US5316206||May 18, 1992||May 31, 1994||Norsk Hydro A.S.||Coating with zinc/zinc alloy metal layer; melting and forming interface alloys with increasing temperature in brazing furnace|
|US5360158||Jul 15, 1993||Nov 1, 1994||The S.A. Day Mfg. Co., Inc.||Annular alloy member coated with flux of tetrafluoroaluminate compound dispersed in adhesive binder of natural resin or water soluble epoxy resin|
|US5418072||Sep 20, 1993||May 23, 1995||Alcan International Limited||Totally consumable brazing encapsulate for use in joining aluminum surfaces|
|US5575933||Apr 24, 1995||Nov 19, 1996||Ni; Jian M.||Flexible elongated welding electrode|
|US5749971||Mar 28, 1996||May 12, 1998||Ni; Chong Yang||Apparatus for making a welding flux coating continously on a welding electrode|
|US5759707||Oct 4, 1996||Jun 2, 1998||Solvay Fluor Und Derivate Gmbh||Binder free, resistant to mechanical stress, for heat exchangers and coolers.|
|US5781846||Aug 7, 1995||Jul 14, 1998||Jossick; James L.||Flux cored brazing composition|
|US5791005||Nov 14, 1996||Aug 11, 1998||The Mill-Rose Company||Scarifying and deburring tool|
|US5806752||Dec 4, 1996||Sep 15, 1998||Ford Global Technologies, Inc.||Manufacture of aluminum assemblies by open-air flame brazing|
|US5820939||Mar 31, 1997||Oct 13, 1998||Ford Global Technologies, Inc.||Increased adhesion strength by substitution of some dispersed oxides of nickel or nickel-aluminum alloy; bonding aluminum or alloy substrate with bonding metal powder, and potassium aluminum fluoride fluxing matrial deoxidizes the substrate|
|US5903814||Jul 30, 1997||May 11, 1999||Nippon Steel Welding Products & Engineering Co., Ltd.||Flux cored wires for gas shielded arc welding|
|US6093761||Apr 14, 1999||Jul 25, 2000||Stanton Advanced Materials, Inc.||Binders for use in forming sintered parts by powder injection molding and forming green body of binder and inorganic powders; consists of a polycarabonate polymer, an ethylenebisamide wax and a guanidine wetting agent|
|US6204316||Jan 21, 2000||Mar 20, 2001||Stanton Advanced Materials, Inc.||Binder system method for particular material|
|US6244397||Apr 3, 1998||Jun 12, 2001||Koni B.V.||Double-acting shock absorber with volume compensation for the stroke of the rod|
|US6248860||Dec 27, 1999||Jun 19, 2001||Empower Materials Inc.||Before becoming cross-linked, comprised alkylene carbonate units having substituents with terminal moieties selected from the group consisting of terminal alkenyl moieties and trialkoxysilane moieties.|
|US6264062||Jun 9, 1999||Jul 24, 2001||Craig D. Lack||Solder preforms with predisposed flux for plumbing applications|
|US6277210||Jun 24, 2000||Aug 21, 2001||Omni Technologies Corporation||Silver brazing flux|
|US6317913||May 8, 2000||Nov 20, 2001||Alcoa Inc.||Method of depositing flux or flux and metal onto a metal brazing substrate|
|US6344237||Mar 3, 2000||Feb 5, 2002||Alcoa Inc.||Spraying gas and metal halide at velocities effective for adhesion to surface without use of binder|
|US6376585||Jun 26, 2000||Apr 23, 2002||Apex Advanced Technologies, Llc||Binder system and method for particulate material with debind rate control additive|
|US6395223||Aug 21, 2001||May 28, 2002||Omn. Technologies Corporation||Method of making a flux, a brazing wire, and a brazing paste|
|US6409074||Jul 13, 2000||Jun 25, 2002||Toyo Aluminium Kabushiki Kaisha||Flux compositions for brazing aluminum, their films and brazing method|
|US6432221||Mar 23, 1999||Aug 13, 2002||Solvay Fluor Und Derivate Gmbh||Fluxing agents|
|US6497770||Feb 15, 2001||Dec 24, 2002||Toyo Aluminium Kabushiki Kaisha||Flux-containing compositions for brazing aluminum, films and brazing method thereby|
|US6680359||Feb 1, 2002||Jan 20, 2004||Cecile J. Schoenheider||Poly(alkylene carbonates), which are useful in manufacturing of articles which may be manipulated and shaped by their user, but regain their shape after distortion.|
|US6713593||Oct 11, 2001||Mar 30, 2004||Pohang Iron & Steel Co., Ltd.||Reacting delta-valerolactone or lactide, carbon dioxide, and alkylene oxide with a catalyst to form a biodegradeable polycarbonate-co-polylactone; uses greenhouse gas carbon dioxide as raw material|
|US6733598||Apr 24, 2002||May 11, 2004||Solvay Fluor Und Derivate Gmbh||Brazing flux for dry application|
|US6846862||Jun 22, 2001||Jan 25, 2005||Apex Advanced Technologies, Llc||Binder system and method for particulate material cross-reference to related application|
|US6864346||Dec 15, 2003||Mar 8, 2005||Cecile J. Schoenheider||Moldable compositions|
|US6881278||Apr 7, 2003||Apr 19, 2005||Showa Denko K.K.||Mixture of ester decomposition catalyst, organohalogen compound, reducing agent and resin; storage stability|
|US7337941||Apr 21, 2003||Mar 4, 2008||Alcoa Inc.||Polyvinyl butyral resin binder, and an organic solvent applied over an aluminum alloy brazing sheet|
|US7442877||Oct 11, 2002||Oct 28, 2008||Yazaki Corporation||Wire manufacturing method wire manufacturing apparatus and wire|
|US20030203137||Feb 18, 1999||Oct 30, 2003||Shoei Teshima||Aluminum-extruded multi-cavity flat tube having excellent brazing characteristics for use in automotive heat exchanger and manufacturing method therefor|
|US20040009358||Apr 21, 2003||Jan 15, 2004||Scott Darwin H.||Flux coated brazing sheet|
|US20050129855||Oct 11, 2002||Jun 16, 2005||Tekeshi Kamata||Wire manufacturing method wire manufacturing apparatus and wire|
|CA1303605C||Oct 13, 1988||Jun 16, 1992||Stephen B. Unruh||Heat exchanger tube having embossed ring bell and brazing ring|
|FR2393812A1|| ||Title not available|
|GB1180735A|| ||Title not available|
|JPS6340697A|| ||Title not available|
|JPS6466093A|| ||Title not available|
|JPS63303694A|| ||Title not available|
|WO1999000444A1||Jun 29, 1998||Jan 7, 1999||Xiaomao Chen||Functionalized poly(alkylene carbonate), and use thereof|
|WO2000031023A1||Nov 12, 1999||Jun 2, 2000||Basf Ag||Method for producing alkenyl-substituted bis(oximether) derivatives|
|WO2000039172A1||Dec 29, 1999||Jul 6, 2000||Chen Xiaomao||Process for obtaining lower molecular weight poly(alkylene carbonate) from higher molecular weight poly(alkylene carbonate)|
|WO2000052228A1||Mar 3, 2000||Sep 8, 2000||Alcoa Inc||A method of depositing flux or flux and metal onto a metal brazing substrate|
|WO2000064626A1||Apr 21, 2000||Nov 2, 2000||Corus Aluminium Walzprod Gmbh||Composite sheet material for brazing|
|WO2002000569A2||Jun 22, 2001||Jan 3, 2002||Apex Advanced Technologies Llc||Binder system and method for forming sintered parts by powder injection molding|
|WO2003068447A1||Feb 12, 2003||Aug 21, 2003||Honeywell Int Inc||Solder paste formulations, methods of production and uses thereof|
|WO2003089176A2||Apr 21, 2003||Oct 30, 2003||Alcoa Inc||Flux coated brazing sheet|
|1||Belova, "Understanding Brazing Fundamentals," The American Welder; Sep.-Oct. 2000; Jul. 11, 2008; .|
|2||Belova, "Understanding Brazing Fundamentals," The American Welder; Sep.-Oct. 2000; Jul. 11, 2008; <http://www.aws.org/wj/amwelder/9-00/fundamentals.html>.|
|3||International Preliminary Report dated Dec. 1, 2009; PCT/US08/064871 filed May 27, 2008.|
|4||International Preliminary Report dated Jun. 11, 2009; PCT/US07/025309 filed Dec. 11, 2007.|
|5||International Preliminary Report dated Nov. 28, 2008; PCT;US07/069636 filed May 24, 2007.|
|6||International Preliminary Report on Patentability dated May 14, 2008; PCT/US06/043856 filed Nov. 9, 2006.|
|7||International Search Report dated Apr. 9, 2008; PCT/US07/025309 filed Dec. 11, 2007.|
|8||International Search Report dated Dec. 21, 2007; PCT/US06/043856 filed Nov. 9, 2006.|
|9||International Search Report dated Dec. 4, 2008; PCT/US08/064871 filed May 27, 2008.|
|10||International Search Report dated Nov. 8, 2007; PCT/US07/069636 filed May 24, 2007.|
|11||Written Opinion of the ISA dated Jun. 11, 2009; PCT/US07/025309 filed Dec. 11, 2007.|
|12||Written Opinion of the ISA dated May 10, 2008; PCT/US06/043856 filed Nov. 9, 2006.|
|13||Written Opinion of the ISA dated Nov. 25, 2009; PCT/US08/064871 filed May 27, 2008.|
|14||Written Opinion of the ISA dated Nov. 8, 2007; PCT;US07/069636 filed May 24, 2007.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8740041||Jul 3, 2012||Jun 3, 2014||Flux Brazing Schweiss-Und Lotstoffe Usa, Llc||Extruded brazing ring with integrated flux|
| || |
|U.S. Classification||148/23, 148/24|
|International Classification||B23K35/34, B23K35/30, B23K35/02, B23K35/40|
|Cooperative Classification||B23K35/406, B23K35/02, B23K35/0216, B23K35/0227, B23K35/3006, B23K35/30, B23K35/0266|
|European Classification||B23K35/02D2, B23K35/02C2, B23K35/02E2B, B23K35/02, B23K35/30B|
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