| Patent Number |
Title Of Patent |
Date Issued |
| 6700105 |
Induction heating system and method for internal combustion engine |
March 2, 2004 |
| A compact induction heating system that is at least partially powered by a source of substantially clean DC current. The induction heating system includes a high frequency inverter with an input connected to a substantially clean DC current source, a first current conductive path inc |
| 6696675 |
Induction heating system for internal combustion engine |
February 24, 2004 |
| A compact induction heating system for use on an internal combustion engine driven implement having an engine driven alternator to generate DC current for storage in a battery used as a source of clean DC current of less than 50 volts for ignition of fuel in the engine, the system compri |
| 6069348 |
Method and apparatus for inductively heating non-circular workpieces |
May 30, 2000 |
| 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 workpiece to be hardened and supported f |
| 5938965 |
Inductor for removing paint from wire hooks |
August 17, 1999 |
| An inductor is provided for removing paint from a workpiece traveling along a longitudinal path and having a vertical stem portion intersecting the path and a hook portion having a juncture with the stem portion and extending laterally to one side of the path. The inductor has front and |
| 5680693 |
Method of making an inductor |
October 28, 1997 |
| 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 rigidly supported between juxtapose |
| 5451749 |
Inductor for inductively heating crank shafts |
September 19, 1995 |
| 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 rigidly supported between juxtapose |
| 5434389 |
Device for monitoring current in an induction heating coil |
July 18, 1995 |
| A monitor device for creating a current signal having a voltage representative of the instantaneous alternating current in an induction heating coil connected to an alternating current supply by two closely spaced, parallel input conductors separated by a narrow gap or flux package t |
| 5430426 |
Transformer |
July 4, 1995 |
| A pancake-type transformer particularly suited for connection to an inductor for inductively heating crankshafts is comprised of a single turn secondary defined by a plurality of generally U-shaped tubular conductors interleaved between the turns of a tubular, multiturn primary conductor |
| 5373143 |
Apparatus and method of measuring temperature |
December 13, 1994 |
| 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 coil and correlating the pulses t |
| 5302215 |
Method and apparatus for selectively heating a workpiece subjected to low temperature thermomech |
April 12, 1994 |
| Process and apparatus are provided for selective heating a portion of a workpiece to achieve improved ausforming and isoforming processes when the workpiece is plastically deformed by mechanical working above the M.sub.s temperature. The process and apparatus includes a preheating step w |
| 5250776 |
Apparatus and method of measuring temperature |
October 5, 1993 |
| 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 coil and correlating the pulses t |
| 5214258 |
Apparatus and method of ultra rapid annealing by induction heating of thin steel strip |
May 25, 1993 |
| An induction heating apparatus and method for ultra rapid annealing of a ferromagnetic strip moving at a selected velocity along a given path. The apparatus and method uses a vacuum tube R.F. oscillator having a D.C. input power supply providing D.C. voltage and D.C. current to the o |
| 5213636 |
Method and apparatus of quench hardening of gear teeth surfaces |
May 25, 1993 |
| 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 quenching is achieved by direc |
| 5157232 |
Method and apparatus for inductively heating asymmetrically shaped workpieces |
October 20, 1992 |
| Metal workpieces having portions of different mass are sequentially stepped through a series of induction heating units having differently contoured inductors for inductively heating the workpiece portions of different mass so as to progressively elevate the portions of different mass to |
| 5117613 |
Induction heating and package sealing system and method |
June 2, 1992 |
| An induction heating package sealing system includes a control which applies full power to an inductor of a first period and reduces power gradually for a second period. A seal temperature profile gradually approaching a temperature goal is thereby achieved which provides for a more |
| 5009395 |
Method and apparatus for selectively heating a workpiece subjected to low temperature thermomech |
April 23, 1991 |
| Process and apparatus are provided for selective heating a portion of a workpiece to achieve improved ausforming and isoforming processes when the workpiece is plastically deformed by mechanical working above the M.sub.s temperature. The process and apparatus includes a preheating step w |
| 4897518 |
Method of monitoring induction heating cycle |
January 30, 1990 |
| A method of monitoring a heating cycle of an induction heating system wherein an inductor encircles a metal workpiece and an alternating current is applied through the inductor from a power supply during the heating cycle. This method comprising the steps of generating an analog signal |
| 4894501 |
Method and apparatus for induction heating of gear teeth |
January 16, 1990 |
| A method and apparatus for induction heating and quench hardening of an undulating cylindrical surface, such as that defined by gear or sprocket teeth, provide a hardness pattern uniformly distributed to a controlled depth across and between the teeth surfaces by means of axial scanning |
| 4893789 |
Method and apparatus for hardening cam lobes on a camshaft |
January 16, 1990 |
| A method and apparatus for inductively heating in an inductor and quench hardening the finished ground cam lobes of steel camshafts to a uniform shallow pattern depth with minimal lobe surface deformation. The inductor is shaped to correspond to the contour of and encircle the individual |
| 4867810 |
Method and apparatus for hardening cam lobes on a camshaft |
September 19, 1989 |
| A method and apparatus for inductively heating in an inductor and quench hardening the finished ground cam lobes of steel camshafts to a uniform shallow pattern depth with minimal lobe surface deformation. The inductor is shaped to correspond to the contour of and encircle the individual |
| 4855556 |
Method and apparatus for hardening gears and similar workpieces |
August 8, 1989 |
| A method and apparatus for progressively hardening an elongated workpiece having an outer generally cylindrical surface concentric with the central axis including the concept of providing closely spaced first and second induction heating coils each having workpiece receiving openings gen |
| 4855551 |
Method and apparatus for hardening gears |
August 8, 1989 |
| Method and apparatus for hardening the outwardly facing teeth surfaces of a gear is disclosed. First and second induction heating coils with power sources controlled by an appropriate microprocessor preheat the gear when in the first coil at precisely controlled cycles to generate an uns |
| 4849594 |
Method and apparatus for shrink fitting metal liner sleeves into inductor heated engine cylinder |
July 18, 1989 |
| A method and apparatus for installing steel liner sleeves in the cylinder bores of an aluminum engine block comprises axially sliding the liner sleeves onto slide portions of respective mandrels, over an inductor coil on the free outer end of each mandrel. After axially moving the mandre |
| 4816633 |
Method of monitoring induction heating cycle |
March 28, 1989 |
| A method of monitoring a heating cycle of an induction heating system wherein an inductor encircles a metal workpiece and an alternating current is applied through the inductor from a power supply during the heating cycle. This method comprising the steps of generating an analog signal |
| 4791259 |
Method and apparatus for retaining a valve seat insert |
December 13, 1988 |
| A method of heat treating a valve seat insert and the resultant combination of the valve seat insert within an engine component is disclosed where the volumetric increase of a portion of the valve seat insert resulting from the heat treatment is utilized to maintain or increase the inser |
| 4785147 |
System for hardening gears by induction heating |
November 15, 1988 |
| An apparatus for hardening the outwardly facing teeth surfaces of a gear is disclosed. First and second induction heating coils with power sources controlled by an appropriate microprocessor heat the gear when in the first coil at a precisely controlled cycle to generate an unstable, |
| 4759808 |
Method for hardening cam lobes on a camshaft |
July 26, 1988 |
| A method and apparatus for inductively heating in an inductor and quench hardening the finished ground cam lobes of steel camshafts to a uniform shallow pattern depth with minimal lobe surface deformation. The inductor is shaped to correspond to the contour of and encircle the individual |
| 4757170 |
Method and apparatus for induction heating gears and similar workpieces |
July 12, 1988 |
| A method and apparatus for progressively hardening an elongated workpiece having an outer generally cylindrical surface concentric with the central axis including the concept of providing closely spaced first and second induction heating coils each having workpiece receiving openings gen |
| 4749834 |
Method and apparatus of hardening gears by induction heating |
June 7, 1988 |
| A method of hardening the radially, outwardly facing surfaces of a generally circular, toothed workpiece adapted to rotate about a central axis generally concentric with the outwardly facing surfaces whereby the extremities of the surfaces define an outer circle by the tips of the te |
| 4749833 |
Induction heating for adhesive bonding |
June 7, 1988 |
| A method and apparatus is disclosed for obtaining an improved bond between two structural members. Spherical particles, preferably graded steel shot, are interspersed within the adhesive and move in sliding and rolling contact relative to one another to establish an accurate space betwee |
| 4745251 |
Valve seat inductor |
May 17, 1988 |
| An inductor for inductively heating the valve seat of an engine component includes electrically non-conductive spacer pads on the inductor coil which engage the valve seat surface to establish the inductive coupling gap, and a centering nose which enters the valve stem bore and coacts wi |
| 4744836 |
Method for selectively heating a workpiece subjected to low temperature thermomechanical process |
May 17, 1988 |
| Process and apparatus are provided for selective heating a portion of a workpiece to achieve improved ausforming and isoforming processes when the workpiece is plastically deformed by mechanical working above the M.sub.s temperature. The process and apparatus includes a preheating step w |
| 4732624 |
Method for hardening camshafts |
March 22, 1988 |
| A camshaft heat treating apparatus and method for processing a plurality of apparatus and method designs, which camshaft identifies and thereafter automatically inductively heats, quenches and inspects the camshaft in accordance with its design parameters. |
| 4728761 |
Method and apparatus for hardening axially spaced cams on a camshaft |
March 1, 1988 |
| Method and apparatus for inductively heating and quench hardening axially spaced cams on a steel camshaft having a longitudinally extending rotational axis concentric with a plurality of axially spaced bearings, which method and apparatus utilizes an induction heating coil having an |
| 4720615 |
Induction sintering process and apparatus |
January 19, 1988 |
| Compacted, unsintered powdered metallurgical workpieces are sequentially shuttled to a series of induction heating units in controlled environments to expel volatile and progressively raise the temperature of the workpiece to an effective sintering temperature. |
| 4715907 |
Method for heat treating ferrous parts |
December 29, 1987 |
| 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 isothermal transformation temperature. |
| 4714809 |
Method and apparatus for shaping the surfaces of cams on a camshaft |
December 22, 1987 |
| A method and apparatus for shaping, in a planar direction, an elongatd generally flat surface formed in a steel workpiece and having a geometric continuous configuration, such as the outer facing surface of a cam on a camshaft for an internal combustion engine, which involve providing an |
| 4704252 |
Isostatic hot forming of powder metal material |
November 3, 1987 |
| A crushed powder metal workpiece preform is enclosed in a shell or envelope of a ceramic liquid die material and is inductively heated through the ceramic material and then transferred to a pressure vessel wherein the liquid die material is pressurized to provide a rapid omnidirectional |
| 4700036 |
Induction heating device with improved locking mechanism for slidable inductors |
October 13, 1987 |
| A disengagable locking arrangement for holding an inductor assembly for heating a valve seat, which assembly is reciprocally movable along a path through a support structure. The support structure includes a "P" shaped clamp disposed within a cavity in the support structure. The clamp ha |
| 4675488 |
Method for hardening gears by induction heating |
June 23, 1987 |
| A method of hardening the radially, outwardly facing surfaces of a generally circular, toothed workpiece adapted to rotate about a central axis generally concentric with the outwardly facing surfaces whereby the extremities of the surfaces define an outer circle by the tips of the te |
| 4675057 |
Method of heat treating using eddy current temperature determination |
June 23, 1987 |
| A method and apparatus for the heat treating of quench hardenable ferrous alloy workpieces utilizing periodic eddy current excitation and reflection to determine the in-line cooling rate from the critical temperature of the workpiece material and comparing the in-line cooling rate agains |
| 4673784 |
Valve seat inductor and method of using same |
June 16, 1987 |
| An inductor for inductively heating the valve seat of an engine component includes non-magnetic spacer pads on the inductor coil which engage the valve seat surface to establish the inductive coupling gap, and a centering nose which enters the valve stem bore and coacts with a univer |
| 4659892 |
Valve seat induction heating apparatus |
April 21, 1987 |
| An induction heating apparatus for inductively heating the valve seats of a family of engine component designs includes a plurality of rotatably mounted inductors which are selectively indexed and cycled in accordance with the component design presented at the heat treating station. |
| 4643781 |
Method of heat treating valve inserts |
February 17, 1987 |
| An induction hardened valve seat insert is provided with a ridged outer surface which establishes a mechanically locked engagement with the wall of the insert bore during the induction heating cycle. |
| 4638418 |
Power inverter |
January 20, 1987 |
| A power inverter particularly suited for use in applications requiring serially inductively heating workpieces in a predetermined manner, having a main inverter and an auxiliary starting inverter, in an arrangement in which the starting inverter is selectively applied and removed from th |
| 4637844 |
Method for heat treating ferrous parts |
January 20, 1987 |
| 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 isothermal transformation temperature. |
| 4628167 |
Apparatus for inductively hardneing the interior surface of objects |
December 9, 1986 |
| An induction heating device is provided which can be easily and inexpensively modified to inductively heat and quench harden workpiece bores of various diameters. The device consists of a permanently mounted mandrel and easily interchangeable inductor coil and quench modules which ca |
| 4618125 |
System for hardening camshafts |
October 21, 1986 |
| A camshaft heat treating apparatus for processing a plurality of camshaft designs, which camshaft identifies and thereafter automatically inductively heats, quenches and inspects the camshaft in accordance with its design parameters. |
| 4604510 |
Method and apparatus for heat treating camshafts |
August 5, 1986 |
| A method and apparatus for heat treating camshafts includes a retractable shield positioned between a previously hardened surface and a surface being heat treated. During the induction heating and quenching cycle, a coolant is delivered to the hardened surface to maintain the temperature |
| 4592537 |
Apparatus for heat treating and sizing thin walled articles |
June 3, 1986 |
| Thin walled broached parts are heat treated from manufactured dimensions to predetermined dimensions through control of heating, cooling and pressurization parameters during the heat treating cycle. |
