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| Number | Title | Issue Date |
| 7641747 | Rolling member and producing method thereof A rolling member excellent in pitting strength, spalling strength and bending strength of dedendum has a first quench hardened layer 1 which is formed on a surface layer of the rolling member and has a parent phase taking the form of martensite phase which fo... | 01/05/2010 |
| 7566373 | Rolling member and producing method thereof A rolling member excellent in pitting strength, spalling strength and bending strength of dedendum has a first quench hardened layer 1 which is formed on a surface layer of the rolling member and has a parent phase taking the form of martensite phase which fo... | 07/28/2009 |
| 7442906 | Induction heating coil for shaft member having multiple steps and heating method In an induction heating coil for heating a shaft member having multiple steps, annular conductors are separately disposed in the axis direction, the annular conductors having inner diameters so as to form predetermined gaps with outer peripheries of heating portions... | 10/28/2008 |
| 7146735 | Method of making a bearing ring for a large roller bearing A bearing ring for a large roller bearing is formed with at least one annular race which is hardened by heating by juxtaposing that race with an inductor across a spacing which is maintained during the heating and then quenching. The spacing is controlled selectivel... | 12/12/2006 |
| 7087869 | Transverse induction heating apparatus In a transverse induction heating apparatus in which a material to be rolled is heated by inductors to which electric power is supplied from an AC power source, iron core widths of the inductors in a plate width direction of the material to be rolled are smaller tha... | 08/08/2006 |
| 7077920 | Method of making coated steel part with regions of different ductility A workpiece having regions of different ductility is made by first coating opposite faces of a flat sheet-metal workpiece of low ductility and then stripping the coating from the faces in one region of the workpiece while leaving the coating on the faces in another ... | 07/18/2006 |
| 7022952 | Dual coil induction heating system A dual coil induction cooking system and method for heating ferrous and non-ferrous cooking vessels. The system includes a first resonant circuit for inducing a current in a ferrous metal cooking vessel at a first frequency and a second resonant circuit, wired in a ... | 04/04/2006 |
| 6903316 | Method and apparatus for induction hardening An apparatus and method for induction hardening a workpiece can first include fastening a workpiece in a clamping assembly. The clamping assembly is provided with a plurality of hardness testing devices. Alternatively, one or more hardness testing devices are provid... | 06/07/2005 |
| 6815649 | Device and method for inductive billet heating with a billet-heating coil A device for inductive billet-heating includes a single or multi-layer billet-heating coil (4) for a round billet (5), in which the billet-heating coil (4) is made up of one or more consecutive, galvanically separated zones. The zones are suppli... | 11/09/2004 |
| 6706127 | Lean manufacturing process for making ball-screw racks A method of making a ball-screw rack bar for use in a power steering mechanism of an automotive vehicle. Transverse rack teeth are cut in an exterior surface of a first end portion of a length of a bar stock. A ball-screw thread is cut in an exterior surface of a se... | 03/16/2004 |
| 6648995 | Method of quenching workpiece with hole, assistive tool for use in quenching, and crankshaft A ferrite core partly covered with ceramics members is loaded into an oil hole defined in a pin, and high-frequency induction hardening is effected on the pin while the ferrite core is being held in position by copper wires. At the same time, a magnetic f... | 11/18/2003 |
| 6638379 | Method and device for hardening bearing surfaces of crankshafts This invention relates to a procedure for hardening the bearing surfaces (H1,H2,H3,H4) of a shaft or axle, in particular a crankshaft (2) or camshaft, in which the bearing surfaces (H1-H4) to be hardened are hardened sequentially with the shaft or axle tu... | 10/28/2003 |
| 6635856 | Billet induction heating A plurality of billets are inductively heated in a staged process wherein the output current of a power supply is repeatedly time shared among a plurality of induction coils within which the plurality of billets have been placed. The time periods of the a... | 10/21/2003 |
| 6589373 | Selectively heat treated airbag canister and method for making same A selectively heat treated canister for use in a vehicle airbag deployment system is configured to contain combustion materials and to contain gases produced from the combustion thereof. The canister includes a tubular body having a length and a longitudi... | 07/08/2003 |
| 6555800 | Process and apparatus for the induction hardening of crankshafts In a process for the induction hardening of crankshafts with at least one connecting-rod pin and with at least two main bearings, in particular for the hardening of the at least one connecting-rod pin, by means of a contactlessly operating inductor, the c... | 04/29/2003 |
| 6502473 | Rack bar and manufacturing method thereof A rack bar of a power steering unit for a vehicle has improved bending strength. The rack bar includes a rod portion which fits slidably into an oil seal attached to a cylinder portion of a power cylinder, and a rack portion which is formed with the rod p... | 01/07/2003 |
| 6454884 | Method of manufacturing a vehicle structural beam A vehicle structural beam, such as a door intrusion beam, which possesses an elongate tubular beam part which at opposite ends is provided with mounting flanges for securement to a vehicle frame. The elongate tubular beam part and the flanges provided at ... | 09/24/2002 |
| 6407372 | Eccentric driving apparatus To arbitrarily adjust the diameter of revolution when revolving an object without being associated with rotation by a simple structure. A bearing 322a is mounted to a bottom surface of a supporting plate 310 for supporting an object. First rotation sleeve 322c... | 06/18/2002 |
| 6399928 | Device for hardening cylindrical bearing points of a shaft An apparatus for hardening cylindrical bearing faces (L) of a shaft (K), wherein at least one of the transitional radii (R1, R2) to the adjoining shaft portions (W1, W2) is constructed recessed, includes a pair of inductive heating units (1, 2), which are... | 06/04/2002 |
| 6398886 | Method and device for completing outer joint elements that are formed without cutting A process of finishing outer joint parts formed in a non-cutting way and intended for constant velocity joints, said outer joint parts having a longitudinal axis and an inner recess which extends in the direction of the longitudinal axis and which, in the... | 06/04/2002 |
| 6398885 | Method and apparatus for preventing cracking of the shank junction of die blocks A method and apparatus for tempering the shank portion only of die blocks which comprises subjecting the shank portion of a die block or other large metal part to electrical energy derived from induction heating or infrared heating to a controlled depth, ... | 06/04/2002 |
| 6274857 | Induction heat treatment of complex-shaped workpieces A multi-station induction heat treatment system is used for heat treating metal workpieces that have multiple generally cylindrical components whose axes are parallel to and offset from a common workpiece axis. The heat treatment system includes heat trea... | 08/14/2001 |
| 6270595 | Bushing for crawler belt and method of manufacture Crawler belt bushings and heir producing methods, with which productivity and cost performance can be improved over the carburization treatment and the induction hardening treatment. After a workpiece made from steel is heated from its outer circumferenti... | 08/07/2001 |
| 6270596 | Process for producing high strength shaft Disclosed is a process for producing a shaft having improved strength without sacrificing machinability and cold workability. The process for producing a high strength shaft comprises the steps of: rolling or forging an alloy at a heating temperature of A... | 08/07/2001 |
| 6187118 | Method for heat-treating steel work pieces A method of heat-treating a work piece of high-alloy steel by hardening involves relatively briefly annealing the work piece before hardening, followed by cooling the work piece. The brief annealing that is performed before the actual hardening and the en... | 02/13/2001 |
| 6166360 | Heat treating of metallurgic article with varying aspect ratios This invention provides methods for rapidly heating a metal part of varying thickness. In general, the invention provides methods comprising heating the thicker section(s) of the part by induction heating and the thinner section(s) by resistance heating. ... | 12/26/2000 |
| 6160248 | Device for electro-inductive hardening of bearing surfaces and transition radii in crankshafts The invention relates to a device for simultaneous peripheral electro-inductive hardening of bearing surfaces (2A, 3A) and transition A radii in crankshafts (1), comprising lifting pins (2, 3) arranged directly adjacent to each other and one behind the ot... | 12/12/2000 |
| 6140625 | Device for rotating and simultaneous hardening by electric induction The invention relates to the rotary and simultaneous electroinductive hardening of the bearing surfaces (2a; 3a) of crank pins (2; 3) of a crankshaft (1) disposed immediately one beside the other and offset in relation to one another in the axial directio... | 10/31/2000 |
| 6123785 | Product and process for producing constant velocity joint having improved cold workability and strength The process for producing a constant velocity joint having improved cold workability, rolling fatigue life, and torsional strength comprises the steps of: rolling or forging an alloy at a heating temperature of Ac3 to 1000° C. with a reduction... | 09/26/2000 |
| 6093268 | Corrective tempering method for rolling elements In a corrective tempering method and apparatus for a rolling element in which the thermal deformation of the rolling element is corrected within an extremely short time by utilizing plasticity exhibited during a metallic structure transforming process bro... | 07/25/2000 |
| 6077475 | Arrangement and process for the inductive hardening of profiled camshafts In a device for inductive hardening of profiled camshafts (especially those having valve cams and zero cams) during a hardening operation, the camshaft is surrounded by an inductor and is heated by means of a magnetic field emanating from the inductor. Th... | 06/20/2000 |
| 6069348 | Method and apparatus for inductively heating non-circular workpieces Apparatus for inductively heating and hardening diesel cam shaft lobes includes a table supporting an inductor for radial displacement relative to the lobe of a workpiece to be hardened and a master component having a lobe identical to that of the workpie... | 05/30/2000 |
| 5906691 | Induction hardened microalloy steel having enhanced fatigue strength properties Improved fatigue strength properties are achieved in an induction hardened microalloy steel useful for demanding service environments. The microalloy steel has low carbon and sulfur contents, comprising in % by weight, 0.15% to 0.45% C, 0.50% to 1.60% Mn,... | 05/25/1999 |
| 5902423 | Heat treatment of grinding rod A process for heat treating a steel bar to produce a grinding rod having a softer core of at least 99% pearlite and having a hardness of less than 45 Rockwell C, an outer shell of martensite having a hardness of at least 50 Rockwell C and softer end porti... | 05/11/1999 |
| 5796078 | Method for the inductive surface hardening of workpieces In a method for the inductive surface hardening of workpieces with any desired external geometries, especially camshafts for internal combustion engines, an inductor (15) is provided which at least partially surrounds the workpiece (2 or 4). The workpiece... | 08/18/1998 |
| 5528019 | High frequency induction heating method for rocker arms Disclosed is a high-frequency heating apparatus including an elongated chamber in which a plurality of rocker arms are introduced, each of the rocker arms being attached with a chip and brazing filler such as a copper wax, a high-frequency brazing coil fo... | 06/18/1996 |
| 5473960 | Steering rack shaft and method of manufacturing the same A steering rack shaft having a shaft body and rack teeth formed in a predetermined axial region of the shaft body. This steering rack shaft is formed such that a workpiece is quenched, and is then heated for a predetermined time at a temperature exceeding... | 12/12/1995 |
| 5451749 | Inductor for inductively heating crank shafts An inductor for inductively heating bearing surfaces of a crankshaft is machined from a block of copper to provide parallel, closely spaced and integrally joined inductor block portions having machined coolant passages therein. The machined inductor is ri... | 09/19/1995 |
| 5411612 | Method of scaleless induction heating A method and apparatus for carrying out scaleless inductive heating of ferrous parts comprising (i) using an integrated manifold-inductor quenchant device, and while gradually flowing a diluted combustible gas into the spacing between the inductor and par... | 05/02/1995 |
| 5412183 | Method and devices for induction heating during the passage of a metallurgical product of elongated shape The product (11) is in relative motion in the direction (12) of its axis with respect to at least one magnetic inductor (10, 10'). The metallurgical product (11) is subjected to at least two magnetic fluxes (19, 19') having non-parallel directions which a... | 05/02/1995 |
