Tube (i.e., Pipe) Patents (Class 219/643)
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Publication number: 20080142510Abstract: Apparatus and method for inductive heating of a transfer pipe having a bore for transporting a flowable material. A heating coil assembly is disposed along an exterior length of the pipe for generating a magnetic flux for inductively heating the pipe and/or a material flowing in the bore. The coil configuration comprises a continuous coil having spaced-apart coil groups along the pipe length, with adjacent coil turns in each group. In various applications, such as for transporting molten metals from a furnace to a casting assembly, this coil configuration can provide one or more benefits including: reduced energy consumption by reducing thermal losses in the pipe and thus reducing the required temperature at which the molten material is delivered to the pipe; tighter temperature control; improved consistency of the molten material; increased heating efficiency, and/or greater thermal uniformity of the pipe and/or the molten material in the pipe.Type: ApplicationFiled: December 14, 2006Publication date: June 19, 2008Applicant: iTherm Technologies LPInventors: Kyle B. Clark, Valery Kagan
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Publication number: 20080105671Abstract: A heating apparatus for heating a pipe prior to performing a welding operation, an interpass welding operation, or a hydrogen bake-out operation is provided. The heating apparatus comprises at least one heating collar placed on one side of a pipe weld joint and a control mechanism for controlling the thermal energy transferred from the heating apparatus to the pipe.Type: ApplicationFiled: July 5, 2007Publication date: May 8, 2008Inventor: Colin Regan
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Publication number: 20080041551Abstract: Method for inductive heating of a material located in a channel, the material having a melting range between a solidus temperature and a liquidus temperature. The method includes providing an internal inductive heating assembly in the material in the channel, and supplying a signal to the assembly to generate a magnetic flux in at least one of the assembly and material. The magnetic flux generates inductive heating of the assembly and/or the material and a physical agitation which lowers the solidus temperature of the material to a reduced solidus temperature.Type: ApplicationFiled: August 16, 2006Publication date: February 21, 2008Applicant: iTherm Technologies, L.P.Inventors: Wayne N. Collette, Kyle B. Clark, Valery Kagan, Stefan von Buren
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Patent number: 7317177Abstract: A magnetic flux concentrator is used to control the end heating of a tubular material in an electric induction heat treatment process. The magnetic flux concentrator may consist of fixed elements, or a combination of fixed and moveable elements to accommodate end heating of tubular materials having different dimensions or material properties.Type: GrantFiled: March 27, 2007Date of Patent: January 8, 2008Assignee: Inductoheat, Inc.Inventors: Don L. Loveless, Peter A. Ross, Valery I. Rudnev, John Paul Lang
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Publication number: 20070246459Abstract: A magnetic flux concentrator is used to control the end heating of a tubular material in an electric induction heat treatment process. The magnetic flux concentrator may consist of fixed elements, or a combination of fixed and moveable elements to accommodate end heating of tubular materials having different dimensions or material properties.Type: ApplicationFiled: March 27, 2007Publication date: October 25, 2007Inventors: Don L. Loveless, Peter A. Ross, Valery I. Rudnev, John Paul Lang
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Patent number: 7141768Abstract: A device for fastening surfaces together in an effective, efficient, and preferably reversible bond is disclosed. This device is particularly useful in the construction industry for fastening roll goods, such as wall coverings, or mill work, such as moldings, to surfaces, such as walls. The fastening device comprises a susceptor sheet, preferably having a thickness of no greater than about 2 mils, and a heat-activateable adhesive on at least one surface of the susceptor, wherein adhesive is placed on the substrate in a very carefully and specifically-defined manner. The fastening device is activated by induction heating, preferably by a hand-held induction tool. The method of fastening surfaces together utilizing the fastening device described above is also disclosed.Type: GrantFiled: April 24, 2001Date of Patent: November 28, 2006Assignee: Nexicor, LLCInventors: Adam G. Malofsky, Bernard M. Malofsky, William H. Mann
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Patent number: 7060951Abstract: To set the length of a rotary tool (1a), to be thermally shrunk in place in a tool holder (7a), by means of an inductive heating device (15a), a setting device is provided with a positioning holder (61) for the rotary tool (1a), this positioning holder (61) being freely displaceable, but lockable, along a guide (35a) and its tool push-in movement into the thermally expanded tool holder (7a) being limited by a stop (71). The rotary tool (1a) bears with its tip (31a) against a stop (43a) of the positioning holder (61). By means of a length-measuring device (39a), the stop (71) limiting the push-in movement can be limited to a position in which the tip (31a) of the rotary tool (1a) is at a predetermined distance from a reference surface (33a) of a holder receptacle (17a), holding the tool holder (7a) during the shrink-fitting operation, or from a corresponding reference surface of the tool holder (7a).Type: GrantFiled: April 26, 2005Date of Patent: June 13, 2006Assignee: Haimer GmbHInventors: Franz Haimer, Josef Haimer, Bernhard Regau
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Patent number: 7012227Abstract: A method of applying or repairing a coating on a substrate by inductive heating. A susceptor element is applied on the coating and the element and the substrate are inductively energized to cause the substrate and the coating to be heated. The susceptor element is removed from the heated coating before applying the coating or applying a patch to the coating.Type: GrantFiled: August 12, 2004Date of Patent: March 14, 2006Assignee: ShawCor, Ltd.Inventors: Amarjit Tathgur, Dilip K. Tailor, David Seepersaud
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Patent number: 6867396Abstract: An apparatus for inductively heating a sleeve section, having a central holding opening for a shank of a rotary tool, of a tool holder that holds the shank in the holding opening in a press fit and releases it upon heating. The apparatus includes an induction coil arrangement with at least one induction coil, a generator that feeds the induction coil arrangement with electric current of periodically varying amplitude, and a yoke arrangement of magnetizable material, which concentrates the magnetic flux of the induction coil onto the sleeve section in a fashion distributed all around. The induction coil is axially offset from the tool holder axis of rotation, in particular substantially radially next to the axis of rotation, and does not wrap around the section. Furthermore, the induction coil includes a coil core, of magnetizable material, that is connected in a magnetically conducting fashion to the yoke arrangement.Type: GrantFiled: November 26, 2002Date of Patent: March 15, 2005Assignee: Franz Haimer Maschinenbau KGInventor: Franz Haimer
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Publication number: 20040084442Abstract: An induction tool for heating well casing and a method for using and manufacturing the tool. The tool comprises a magnetically permeability core and an electrically conductive coil surrounding the entire circumference of the core. The tool generates magnetic flux which flux is used to heat well casing adjacent to or acted upon by the tool. The heated well casing may be used to melt material used for well sealing.Type: ApplicationFiled: November 6, 2002Publication date: May 6, 2004Applicant: CANITRON SYSTEMS, INC.Inventor: Thomas A. La Rovere
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Process for producing welded steel pipes with a high degree of strength, ductility and deformability
Patent number: 6648209Abstract: In a process for producing welded steel pipes, a pipe is molded cold from a TM-rolled sheet, welded together and sized to the desired diameter, whereby the sheet includes steel with (in wt. %) 0.02 to 0.20% carbon, 0.05 to 0.50% silicon, 0.50 to 2.50% manganese, 0.003 to 0.06% aluminum, the remainder being iron with potentially other production-related impurities. After welding and sizing, the pipe is subjected to a heat treatment process at a temperature of 100-300° C. and for a holding time that is suited to the thickness of the pipe wall, with subsequent cooling with air or by forced cooling. The resulting pipe is resistant to aging and has sufficiently integral deformation reserve against fracturing with the same high degree of strength, without exceeding the upper limit for the ratio of yield strength to tensile stress according to the current industry standards for conventional steels.Type: GrantFiled: November 13, 2001Date of Patent: November 18, 2003Assignee: Mannesmannröhren-Werke AGInventors: Gerold Hohl, Gerhard Knauf -
Publication number: 20030168445Abstract: An apparatus for inductively heating a sleeve section (16), having a central holding opening (18) for a shank (20) of a rotary tool (22), of a tool holder (10) that holds the tool shank in the holding opening in a press fit and releases it upon heating, comprises an induction coil arrangement with at least one induction coil (24), a generator (26) that feeds the induction coil arrangement with electric current of periodically varying amplitude, and a yoke arrangement (32, 34), of magnetizable material, which concentrates the magnetic flux of the induction coil arrangement onto the sleeve section in a fashion distributed all around. According to the invention, for the purpose of heating the sleeve section, the induction coil is arranged with reference to an axis of rotation (12) of the tool holder in a fashion offset eccentrically from the sleeve section and without wrapping around said section, in particular substantially radially next to the latter.Type: ApplicationFiled: November 26, 2002Publication date: September 11, 2003Inventor: Franz Haimer
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Patent number: 6353706Abstract: An electrical heating method and apparatus for minerals wells having a metallic fluid admission section located adjacent a hydrocarbonaceous reservoir of a heterogeneous reservoir that has at least two longitudinally spaced producing intervals having different thermal heat transfer characteristic. The method includes providing a downhole electrically energized heater having at least two independently controlled heating elements spaced longitudinally apart from each other. At least one of the heating elements is positioned near a first of the producing intervals adjacent the fluid admission section. The second of the heating elements is positioned near a second of the producing intervals adjacent the fluid admission section.Type: GrantFiled: October 26, 2000Date of Patent: March 5, 2002Assignee: Uentech International CorporationInventor: Jack E. Bridges
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Patent number: 6346690Abstract: A method and apparatus for induction heating includes a power supply, and a controller, and an induction head. The induction head includes a flexible coiled, such as one formed with Litz wire. The head also includes a thermal insulator, for disposing between the head and the workpiece. The insulator reflects heat back to the workpiece, protecting the coil, but is transparent to inductive (E-M) energy. The power supply is a variable output frequency power supply, such as one having a resonant tank, to adapt to the inductance of the head.Type: GrantFiled: September 20, 2000Date of Patent: February 12, 2002Assignee: Illinois Tool Works Inc.Inventors: Mark Ulrich, David M. Bickel, Don Wiseman, Randall Baxter
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Patent number: 6262403Abstract: A diffusion bonding method having a step of adjusting ends of material to be bonded before bonding the material after setting the materials in the diffusion bonding apparatus, whereas a diffusion bonding apparatus having a means of finishing ends of materials to be bonded so that both ends face parallel to each other.Type: GrantFiled: August 24, 1999Date of Patent: July 17, 2001Assignee: Daido Tokushuko Kabushiki KaishaInventors: Masaki Tsuchiya, Takao Shimizu, Hiroaki Suzuki
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Patent number: 6230745Abstract: A pipe heating device for conveniently thawing out pipelines. The pipe heating device includes a scissor-like member including a first elongate member having a first end, a second end, and an intermediate portion, and also including a second elongate member having a first end, a second end, and an intermediate portion which is hingedly attached to the intermediate portion of the first elongate member; and also includes a first semi-cylindrical member having ends, side edges and being securely attached to the first end of the first elongate member; and further includes a second semi-cylindrical member having ends, side edges and being securely attached to the first end of the second elongate member with each of the side edges of the second semi-cylindrical member being in contactable relationship with a respective one of the side edges of the first semi-cylindrical member; and also includes a heating assembly for heating the first and second semi-cylindrical members.Type: GrantFiled: June 16, 2000Date of Patent: May 15, 2001Inventor: Cullen Brooks
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Patent number: 6229126Abstract: A method and apparatus for induction heating includes a power supply, and a controller, and an induction head. The induction head includes a flexible coiled, such as one formed with Litz wire. The head also includes a thermal insulator, for disposing between the head and the workpiece. The insulator reflects heat back to the workpiece, protecting the coil, but is transparent to inductive (E-M) energy. The power supply is a variable output frequency power supply, such as one having a resonant tank, to adapt to the inductance of the head.Type: GrantFiled: May 5, 1998Date of Patent: May 8, 2001Assignee: Illinois Tool Works Inc.Inventors: Mark Ulrich, David M. Bickel, Don Wiseman, Randall Baxter
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Publication number: 20010000402Abstract: The present invention provides an induction heating method for a manifold in a hot runner mold where it is possible to uniformly heat material over the entire length of a runner and in which a coil may be easily attached to and detached from the manifold.Type: ApplicationFiled: December 5, 2000Publication date: April 26, 2001Applicant: JU - OH INCInventors: Itsuo Shibata, Shinichi Edagawa, Ryoichi Sekiguchi, Hitoshi Toki, Tamotsu Munakata
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Patent number: 6193834Abstract: An apparatus for fusing a pipe to a fitting includes an induction heating element wholly encased or coated with a flusible thermoplastic polymeric material, a fitting having a socket or a flange. The induction heating element is adapted to be inserted into said socket or mounted on said flange, the fitting and the element together defining a throughbore, a portion of a pipe adapted to be inserted into the throughbore or mountable on said flange. The apparatus also includes a locating and maintaining member on the induction heating element with one or more projections adapted to be snap-fitted on the fitting, the pipe or both, and capable of locating and maintaining the position of the heating element relative to the fitting or the member portion. The induction fusion element is capable of fusing the fitting and the pipe portion.Type: GrantFiled: April 23, 1999Date of Patent: February 27, 2001Assignee: Uponor Aldyl CompanyInventor: Cin Lee Smith
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Patent number: 6166359Abstract: Induction heating apparatus for use in welding an end of a first length of pipe (26) to the exterior surface of a second length of pipe (28), consists of heating assemblies (20, 24) each comprising at least one electrical induction coil (32, 36) wound on an annular, laminated, magnetic core assembly (30, 34). The lowermost surfaces of said core assembly (30, 34) define a saddle shape adapted to be seated on the exterior surface of said second length of pipe (28). The arrangement of the coils (32, 36) and the core assemblies (30, 34) is such that substantially all of the magnetic flux generated when the apparatus is seated on the pipe (28) and the coil is energised is contained within the core assembly and within the wall of the pipe (28). Advantageously, the core assemblies (30, 34) have E-sections profiles, the ends of the limbs of the E-sections comprising the lowermost surfaces of the core assemblies and the coils being wound about the central limbs of the E-sections.Type: GrantFiled: May 2, 2000Date of Patent: December 26, 2000Assignee: Coflexip Stena Offshore Ltd.Inventor: John Duncan Cruickshank
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Patent number: 6107613Abstract: An adjustably dimensionable inductive heating apparatus includes inductor turns which are supported by a slide or actuator to allow selective positioning of the inductor turns to a variety of positions. The adjustable support members are disposed to allow the inductor turns to move in a relative width dimension or a relative turn spacing or height dimension. Flexible crossover connector cables accommodate turn repositioning without inhibition of inductor movement. Another feature includes selective length adjustment with the inclusion of a plurality of flexible crossover connectors including in-line switches for selecting which crossover connector cable will determine overall coil length.Type: GrantFiled: March 22, 1999Date of Patent: August 22, 2000Assignee: Ajax Magnethermic CorporationInventors: George P. Welch, Michael R. Faber
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Patent number: 6093917Abstract: A high frequency heating coil device having sufficient flexibility and heating ability is provided. Coils 2 are contained in outer jacket 1. The coils 2 are made of steel, copper or brass tubing which is annealed sufficiently to be flexible. Plural pieces of magnetic substance 10 are arranged in series between the coils 2. Flexible spacer 9 is arranged between a magnetic substance 10 and the coils 2. Upper and lower end faces of each piece of the magnetic substance 10, make direct contact with other adjacent pieces, and are made with curved faces a. Heating coil device is so constructed that when inserted into a hole of an object to be heated and high frequency current is supplied to the coils to the coils 2 from electric source 6, eddy currents are generated in an inner surface of the hole in order to heat the object. The heating coil device, while being bent to avoid obstructions, can still be inserted into and drawn out of the hole.Type: GrantFiled: November 5, 1998Date of Patent: July 25, 2000Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Takayuki Kawano, Takijiro Shimamoto, Masanori Terasaki
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Patent number: 5750971Abstract: Radio frequency power for melting, sealing and welding plastic tubing compressed between a pair of manually or automatically actuated electrically conducting jaws of a hand held or fixed base tubing sealer is regulated by a pulse width modulator controlling the duty cycle of applied constant voltage pulses. A predetermined change of impedance of the tubing during compression and melting is detected to regulate the power applied and to ensure a weld of predetermined physical parameters. On completion of the weld, a first timer is reset and a further weld may be made. In the event of impedance mismatch, a second timer inhibits further application of power and resetting of the first timer. The use of the pulse width modulator enhances conservation of power and accommodates portability of the tubing sealer through use of rechargeable batteries as the power source.Type: GrantFiled: July 25, 1996Date of Patent: May 12, 1998Assignee: Engineering & Research Associates, Inc.Inventor: Junius E. Taylor
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Patent number: 5580479Abstract: The high-frequency inductor heating tube (1) for solder injectors is furnished as a hollow cylinder formed at one end as a cylindrical receiver tube. Windings of an inductor (2) are disposed over length of the cylindrical receiver tube. A solder injector (13) made of a highly heat-conducting base material and covered with a ferromagnetic layer (16) is inserted into the cylindrical receiver tube. Claws (8) of a wire spring (9) inserted into elongated holes (7) disposed in a wall of the cylindrical receiver tube lock the solder injector (13) in the cylindrical receiver tube.Type: GrantFiled: May 11, 1995Date of Patent: December 3, 1996Inventor: Werner Bruns
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Patent number: 5543604Abstract: Radio frequency power for melting, sealing and welding plastic tubing compressed between a pair of manually or automatically actuated electrically conducting jaws of a hand held or fixed base tubing sealer is regulated by a pulse width modulator controlling the duty cycle of applied constant voltage pulses. A predetermined change of impedance of the tubing during compression and melting is detected to regulate the power applied and to ensure a weld of predetermined physical parameters. On completion of the weld, a first timer is reset and a further weld may be made. In the event of impedance mismatch, a second timer inhibits further application of power and resetting of the first timer. The use of the pulse width modulator enhances conservation of power and accommodates portability of the tubing sealer through use of rechargeable batteries as the power source.Type: GrantFiled: September 16, 1994Date of Patent: August 6, 1996Assignee: Engineering & Research Associates, Inc.Inventor: Junius E. Taylor
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Patent number: 5526561Abstract: A jaw-like cylindrical tool for producing a strong electromagnetic field for causing a Curie point heater to be energized having a curved cross-section that brings the two edges of the jaw-like structure into contact. Closely spaced conductors lie along the inner surface of the structure transverse to its axis while widely spaced conductors lie transverse to said axis along the outer surface of the structure. The inner surface of the structure has a plurality of axially extending ferrite rods lying immediately adjacent the inner surface conductors. The inner and outer surface conductors are connected so that the currents flow in opposite directions, the outer conductors reducing electromagnetic radiation while the ferrites and inner conductor spacing produce a strong central magnetic field irrespective of the field created by the opposing field produced by the outer conductors.Type: GrantFiled: March 20, 1995Date of Patent: June 18, 1996Assignee: Gas Research InstituteInventor: Thomas H. McGaffigan
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Patent number: 5466916Abstract: When resin pipes are connected through induction heating, the resin pipes of this invention do not form inside bulges due to air and resin expansion during the heating process. A cylindrical heater made of stainless steel is placed around the joint between two resin pipes made of polyvinylidene fluoride. The heater is then heated by induction heating to weld the joint of resin pipes. The heater has a plurality of holes on the cylindrical surface so that air and molten resin located between the heater and the resin pipes are released through the holes.Type: GrantFiled: July 25, 1994Date of Patent: November 14, 1995Assignees: Hidec Co., Ltd., Asahi Yukizai Kogyo Co. Ltd.Inventors: Atsushi Iguchi, Atsushi Akabane, Takehiro Yamashita, Koichi Matsuoka
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Patent number: 5412182Abstract: An interstitial heater, made of an electrically conductive tube with a wire wound in a toroidal configuration about the tube and connected to a capacitor to form a tank circuit, is driven with a radiofrequency power source at resonance to provide tissue heating by thermal conduction.Type: GrantFiled: April 9, 1992Date of Patent: May 2, 1995Assignee: City of HopeInventor: Kwok W. Chan
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Patent number: 5412184Abstract: A jaw-like cylindrical tool for producing a strong electromagnetic field for causing a Curie point heater to be energized having a curved cross-section that brings the two edges of the jaw-like structure into contact. Closely spaced conductors lie along the inner surface of the structure transverse to its axis while widely spaced conductors lie transverse to said axis along the outer surface of the structure. The inner surface of the structure has a plurality of axially extending ferrite rods lying immediately adjacent the inner surface conductors. The inner and outer surface conductors are connected so that the currents flow in opposite directions, the outer conductors reducing electromagnetic radiation while the ferrites and inner conductor spacing produce a strong central magnetic field irrespective of the field created by the opposing field produced by the outer conductors.Type: GrantFiled: April 16, 1992Date of Patent: May 2, 1995Assignee: Gas Research InstituteInventor: Thomas H. McGaffigan
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Patent number: 5406055Abstract: An apparatus for producing a heat recoverable plastic article such as a tube by deforming the article from a heat-stable configuration to a heat-unstable configuration. The heat-unstable configuration will return to the heat-stable configuration when the article is heated to above the heat recovery temperature. The article is heated such that the article is at a temperature no lower than the heat recovery temperature during the deforming step by lossy particles dispersed in the article or in a tool used in the deforming step. The lossy particles allow auto-regulated heating of the article since the particles cannot be heated beyond their Curie transition temperature when subjected to an alternating magnetic field. These particles are preferably ferrites. Alternatively, the tool can include a braided mesh tubing of a ferromagnetic alloy wire.Type: GrantFiled: June 4, 1993Date of Patent: April 11, 1995Assignee: Metcal, Inc.Inventor: Thomas H. McGaffigan
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Patent number: 5349166Abstract: Radio frequency power for melting, sealing and welding plastic tubing compressed between a pair of manually or automatically actuated electrically conducting jaws of a hand held or fixed base tubing sealer is regulated by a pulse width modulator controlling the duty cycle of applied constant voltage pulses. A predetermined change of impedance of the tubing during compression and melting is detected to regulate the power applied and to ensure a weld of predetermined physical parameters. On completion of the weld, a first timer is reset and a further weld may be made. In the event of impedance mismatch, a second timer inhibits further application of power and resetting of the first timer. The use of the pulse width modulator enhances conservation of power and accommodates portability of the tubing sealer through use of rechargeable batteries as the power source.Type: GrantFiled: October 31, 1991Date of Patent: September 20, 1994Assignee: Engineering & Research Associates, Inc.Inventor: Junius E. Taylor
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Patent number: 5338920Abstract: An electro-fusion fitting includes a body, and a magnetic alloy member which is continuous in the axial direction is embedded in the vicinity of a joint surface of the body. A shield member is arranged on the outer surface of the body in a portion where a cold zone is to be formed. The joint surface of the body and a joint surface of a member to be joined are brought into contact with each other. When a high frequency current is applied to the magnetic alloy member from a high frequency power supply by electromagnetic induction in this state, the magnetic alloy member generates heat, so that the body and the member to be joined are fused, and joined to each other. Since the shield member shields the electromagnetic induction, the magnetic alloy member in a portion where the shield member is provided does not generate heat, so that the cold zone is formed in the portion.Type: GrantFiled: August 28, 1992Date of Patent: August 16, 1994Assignees: Metcal, Inc., Kubota CorporationInventors: Shigeru Okusaka, Hideki Kasa, Masayuki Sakaguchi, Junsuke Kyomen, Takashi Tago