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| Number | Title | Issue Date |
| 7291817 | Scan induction heating An apparatus and process are provided for scan induction heating of a workpiece. The workpiece is moved through an inductor to inductively heat treat features of the workpiece with electric power of varying frequency and duty cycle to control the magnitude of electr... | 11/06/2007 |
| 7034262 | Apparatus and methods for repairing tenons on turbine buckets Bucket tip tenons requiring refurbishment are removed from the bucket tips by grinding. Groups of buckets are clamped on a rotatable table in positions adjacent an induction heating coil and a robotic welding arm, respectively. While one group is preheated, the othe... | 04/25/2006 |
| 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 |
| 5134264 | Device for the inductive heating of the inside of cylinder liners of reciprocating-piston engines for the purpose of hardening A device for induction heating of the inside of cylinder liners of reciprocating-piston engines to a transformation temperature, for the purpose of hardening. An inductor head is equipper with an aligning device designed as a spreadable cage which is equi... | 07/28/1992 |
| 4791259 | Method and apparatus for retaining a valve seat insert 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 ... | 12/13/1988 |
| 4745251 | Valve seat inductor 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 ... | 05/17/1988 |
| 4700036 | Induction heating device with improved locking mechanism for slidable inductors 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 th... | 10/13/1987 |
| 4673784 | Valve seat inductor and method of using same 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 ... | 06/16/1987 |
| 4659892 | Valve seat induction heating apparatus 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 a... | 04/21/1987 |
| 4643781 | Method of heat treating valve inserts 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.... | 02/17/1987 |
| 4542272 | Induction heating device with electronic positioning control An induction heating apparatus particularly adapted for precisely positioning the inductor relative to the workpiece before initiating the heating process. The inductor is mounted on the end of an inductor shaft that is carried by a slide. The end of the ... | 09/17/1985 |
| 4535212 | Apparatus and method of hardening valve seats A method and apparatus for inductively heating valve seats wherein an inductor is driven to a predetermined magnetic coupling with the valve seat under the control a range detecting transceiver unit.... | 08/13/1985 |
| 4438310 | Method and apparatus for inductively heating valve seat inserts A method and apparatus for heating a conical valve seat surface of a valve seat ring insert which has been previously press fitted or molded into an engine component such as an engine head. The method and apparatus includes mounting an inductor for recipr... | 03/20/1984 |
| 4336432 | Induction hardening of valve seat inserts An induction heating process for hardening a metal insert retained in a recess formed in a second component comprises the steps of fitting the insert in place within the recess by an interference fit, machining the interior surface of the insert, locating... | 06/22/1982 |
| 4332997 | Apparatus for delivery of valves and melting rings to an inductor heater for hard facing An apparatus for delivering valves and melting rings for internal combustion engines to an inductor heater for hard facing comprises a tubular body which is adjoined by gravity feed trays, for feeding the work valves and rings to be melted respectively. A... | 06/01/1982 |
| 4292486 | Apparatus for delivery of melting rings and valves to an inductor heater An apparatus for delivery of melting rings and valves to an inductor heater, for hard facing of valves for internal combustion engines by melting rings of heat-resistant alloy upon the working surfaces of valves, comprises gravity feed trays, one for feed... | 09/29/1981 |
| 4266109 | Floating valve seat inductor A floating inductor assembly for use in heating a generally conical valve seat formed concentrically around a central bore in an engine component, wherein the assembly is adapted to be moved toward and away from the valve seat by a selectively movable ele... | 05/05/1981 |
| 4214139 | Apparatus for surfacing internal combustion engines valves An apparatus for surfacing valves by fusing in a high-frequency current field refractory alloy rings applied to the seating surfaces of the valves. The apparatus comprises a tubular body provided with chutes adjoining thereto. The chutes are adapted respe... | 07/22/1980 |
| 4144432 | Apparatus for surfacing valves for internal combustion engines Surfacing is realized by fusing refractory alloy rings on the effective areas of valves. The apparatus comprises: a heater, a valve clamping device and a manipulator adapted to receive and to convey a valve with a ring on the stem thereof to the heater zo... | 03/13/1979 |
