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| Number | Title | Issue Date |
| 7438773 | Method of manufacturing a blind threaded insert A method of manufacturing a blind threaded insert from metal which method comprises the steps of at least partially forming the insert, by a cold-forming process, other than the internal thread; forming the internal thread; and annealing the appropriate part of the ... | 10/21/2008 |
| 7422643 | Rolling element and method of producing the same There is provided an inexpensive rolling element used under high interface pressure such as induction hardened gears, the rolling element being improved in the seizure resistance of its tooth flanks and having a temper hardness of HRC 50 or more at 300° C. To this ... | 09/09/2008 |
| 7334444 | Method for producing a gearwheel A method is described for producing a gearwheel from a powder-metal blank which is pressed and sintered with an allowance in the toothing region, with the powder metal blank supported on a mandrel being densified in the region of the allowance by pressing on counter... | 02/26/2008 |
| 7168160 | Method for mounting and heating a plurality of microelectronic components A method for heat-treating a plurality of microelectronic structures attached to a non-metallic substrate is disclosed. The method comprises the steps of: (a) placing the non-metallic substrate and the plurality of microelectronic structures in an oscillating electr... | 01/30/2007 |
| 7097580 | Sprocket for a silent chain and method of manufacturing the same A sprocket for preventing the partial wear on the teeth of the sprocket. The teeth of the sprocket comprised of a pair of side portions located on opposite sides of a tooth and a central portion located between the pair of sides. The pair of side portions has a hard... | 08/29/2006 |
| 6734406 | Method for improving the mechanical properties of journal crosses by induction heating The invention relates to a method for improving the mechanical properties, especially the hardness, of journal crosses for use in articulated shafts. According to the invention, a superficial area which is defined by the transition surfaces between two journals that... | 05/11/2004 |
| 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 |
| 6685596 | Variator disc and a method of fabricating the same A blank for disc is heat treated for adjusting a surface hardness thereof to not less than Hv700. The blank has a spline hole thereof heated by high frequency heating while cooling a race thereof. Subsequently, the spline hole is subjected to slow cooling... | 02/03/2004 |
| 6602358 | Outer race for constant velocity joint, having improved anti-flaking properties and shaft strength, and process for producing the same Disclosed are an outer race for a constant velocity joint, having improved anti-flaking properties and shaft strength, and a process for producing the same. The outer race for a constant velocity joint includes a cup and a serration and comprises by weigh... | 08/05/2003 |
| 6548793 | Apparatus and method of inductively heat treating a beveled gear An apparatus and method to inductively heat beveled gear teeth. An inductor has an annular body with a plurality of projections for meshingly engaging beveled of the gear. An inductor coil or loop is associated with each of the projections and is at least... | 04/15/2003 |
| 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 |
| 6315841 | Induction hardened forged gear and process for preparing same Bevel gears having a carbon content of at least about 0.4% by weight, preferably 0.5% by weight are manufactured by a process which includes forging a steel blank having a carbon content of at least 0.4% by weight until a bevel gear precursor having essen... | 11/13/2001 |
| 6264768 | Method for strengthening of rolling element bearings by thermal-mechanical net shape finish forming technique A method and apparatus disclosed for cost-effective net shape precision ausform finishing the engagement surfaces of ball and roller bearings, for enhancing the surface strength and durability of bearing inner and outer races. The method consists of induc... | 07/24/2001 |
| 6259076 | Method for hardening camshafts and linear inductor for the implementation of said method A method for simultaneously hardening a group of cams on a camshaft comprises first heating the group of cams at low power for at least one heating interval, then pausing the heating for a pause interval during which no power is applied to the group of ca... | 07/10/2001 |
| 6129793 | Face-gear forging method A face-gear forging die which can be used to near-net forge face gears is disclosed. The face-gear forging die is constructed from a blank, and is cut to specification using a wire electrical discharge machining (EDM) process. The wire electrical discharg... | 10/10/2000 |
| 6129794 | Method of manufacturing a gear wheel A method of manufacturing a gear wheel including a shaft and a tooth system. The method includes the steps of hardening and annealing the gear wheel, heating the gear wheel to an annealing temperature, spinning the gear wheel when the annealing temperatur... | 10/10/2000 |
| 6019857 | Carburized hardening process and carburized hardened power transmission members Power transmission member such as gears with high breaking strength of the edge portion (A) of the root and high spalling resistance of the tooth side (B) is obtained. The work such as gears, etc. is cooled after carburization by plasma carburizing, etc. ... | 02/01/2000 |
| 6011246 | Induction-heating device for surface treating the teeth of a mechanical part An induction heating device for surface treating the teeth (11) of a mechanical part on which each tooth (111) has a projecting tip (111s) and a tooth root linking the tooth to an adjacent tooth, wherein an in duction coil (12, 12') is spaced from the too... | 01/04/2000 |
| 5824168 | Process for gear-rolling a high accuracy gear According to the present invention, in a heating step, an outer circumferential portion of a workpiece having a disk shape is heated to high temperatures. In a hot rough-rolling step, the outer circumferential portion of the heated workpiece is formed by ... | 10/20/1998 |
| 5803993 | Outer ring for high strength constant velocity joint and production process for same The present invention provides an outer ring for a high strength constant velocity joint which has an excellent torsional strength and torsional fatigue strength and can provide an improved processability, and a process for producing the same. An outer ri... | 09/08/1998 |
| 5562785 | Method for manufacturing toothed gears A disc-shaped material is prepared by punching a high carbon steel plate or soft steel plate, and the disc-shaped material is fixed in position. An outer peripheral portion of the disc-shaped material is heated to a temperature of 400°-500° C. y means o... | 10/08/1996 |
| 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 |
| 5451275 | Apparatus and method for precision gear finishing by controlled deformation An apparatus and method are provided for the thermomechanical net shape finishing of precision gear tooth surfaces by controlled deformation into metastable austenitic condition. To this end, an arrangement of a fixed axis through-feed motion of workpiece... | 09/19/1995 |
| 5428208 | Method of induction case hardening a rack bar A method of case hardening a steering gear rack bar having a plain cylindrical barrel portion and an integral toothed portion on which are formed a plurality of rack gear teeth each having a predetermined helix angle relative to a longitudinal centerline ... | 06/27/1995 |
| 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 |
| 5374809 | Induction heating coupler and annealer An induction heating device includes a handle having a hollow interior and two opposite ends, a wrist connected to one end of the handle, a U-shaped pole piece having two spaced apart ends, a tank circuit including an induction coil wrapped around the pol... | 12/20/1994 |
| 5373143 | Apparatus and method of measuring temperature A method and apparatus for measuring the temperature and heating rate of a workpiece during the induction heating cycle by inducing and detecting a plurality of eddy current pulses at varying frequencies during a short power interruption to the induction ... | 12/13/1994 |
| 5360963 | Apparatus for and method of induction-hardening machine components An induction-hardening machine for the contour hardening of cross-axis, intersecting-axis and nonintersecting-axis gears such as hypoid gears includes a programmable logic control unit, a source of quench liquid and a high-frequency induction generator wh... | 11/01/1994 |
| 5282910 | Process for heating a metal alloy workpiece A metal alloy workpiece is heated convectively in a first step by heat conduction, heat radiation or further non-inductive heat transfer to a temperature lying just below the solidus temperature of the alloy and is heated inductively in a subsequent secon... | 02/01/1994 |
| 5242514 | Method for the production of a hardened guide shaft for a linear guide A method for the production of a hardened guide shaft for linear guide is disclosed, in which teeth are formed in a shaft, which is then passed through a circular inductor without rotation. The magnetic flux of the circular inductor is controlled to reduc... | 09/07/1993 |
| 5213636 | Method and apparatus of quench hardening of gear teeth surfaces A method for induction heating and quench hardening of helical gears provides a hardness pattern uniformly distributed to a controlled depth across and between the teeth surfaces by means of axial scanning of the workpiece and uniform quenching. Uniform q... | 05/25/1993 |
| 4885831 | Method for forming a contour hardened gear Initially, an uncut gear blank is softened by a heat treatment process to provide a relatively soft level of hardness throughout. Then, the softened gear blank is machined so as to form a plurality of teeth about the circumference thereof. The relatively ... | 12/12/1989 |
| 4845328 | Apparatus for and method of induction-hardening machine components An induction-hardening machine for the contour hardening of machine components such as gears includes a machine with both high-frequency and low-frequency induction generators operably arranged with corresponding induction coils positioned at a machine wo... | 07/04/1989 |
| 4715907 | Method for heat treating ferrous parts Ferrous parts are heat treated by preheating the part to an elevated temperature, inductively heating the preheated part to an austenitizing temperature followed by quenching and isothermal transformation in a media maintained at a predetermined isotherma... | 12/29/1987 |
| 4639279 | Single frequency induction hardening process The teeth and roots of a gear are contour hardened by induction at a single work station with a single solid state power supply. The inductor or coil is full-faced and encircles the gear during the preheat and final heat steps of the process. The power su... | 01/27/1987 |
| 4637844 | Method for heat treating ferrous parts Ferrous parts are heat treated by preheating the part to an elevated temperature, inductively heating the preheated part to an austenitizing temperature followed by quenching and isothermal transformation in a media maintained at a predetermined isotherma... | 01/20/1987 |
| 4589935 | Method of induction hardening of gear teeth Disclosed is a process and apparatus for induction hardening of the flank, root and tip surfaces of gear teeth so as to provide a surface-hardened layer along said surfaces. An electrically energizable inductor head carries out movement along the space be... | 05/20/1986 |
| 4026732 | Method for induction hardening gear teeth A method and apparatus for obtaining full tooth width induction hardening of gear teeth. The method comprises attaching gear teeth shaped non-magnetic material templates to the opposite sides of the gears in close proximity to but spaced from the sides of... | 05/31/1977 |
| 4021274 | Method for heat treating by induced current Steel workpieces, such as thread-forming screws and bolts, tapping tools, and the like, are hardened in localized areas to controlled depths of hardening by utilizing loose electromagnetic coupling between the workpiece and the induction coil. The loose c... | 05/03/1977 |
| 3932205 | Heat treating process for achieving forced ageing For forced ageing of a commutator intended for a rotary electrical machine while the commutator is being rotated, heat is being supplied to it by a coil for generating a high frequency magnetic field arranged outside the commutator in such a way that the ... | 01/13/1976 |
