| Patent Number |
Title Of Patent |
Date Issued |
| RE29046 |
Method and apparatus for inductively heating valve seats |
November 23, 1976 |
| A method and apparatus for simultaneously heating the conical surfaces of first and second valve seats lying generally in a given plane on an engine component, which method and apparatus comprises mounting two inductors for independent reciprocal and lateral movement with respect to a co |
| D359406 |
Table with removable tray and/or insert |
June 20, 1995 |
|
| 5564345 |
Stackable table, table assembly, and tray and table combination |
October 15, 1996 |
| A table that is useful alone and in combination with a tray and/or other inserts supported atop the table. The table is of a unitary molded plastic construction and is configured for nested stacking with like tables for convenient and compact storage and handling. The table has a top sur |
| 4625090 |
Apparatus for inductively heat treating workpiece bore walls |
November 25, 1986 |
| A method and apparatus of quench hardening to a desired depth the full axial extent of the wall surface, or selected portions of the wall surface, of an axially extending bore in an elongated workpiece wherein the bore has a selected uniform cross-sectional shape throughout the lengt |
| 4619717 |
Heating magnetic metal workpieces |
October 28, 1986 |
| Method and apparatus for heating a billet of magnetic metal material to a forging or other elevated processing temperature above the Curie point temperature of the workpiece metal by first inductively preheating the billet in an induction heating coil to a preheat temperature not app |
| 4577081 |
Heating nonmagnetic metal workpieces |
March 18, 1986 |
| Method and apparatus for heating a billet of nonmagnetic metal material to forging temperature by first preheating the billet in a high efficiency slot-type electric radiant heat furnace to a preheat temperature a substantial level below the forging temperature, and then conveying the |
| 4538041 |
Rotating induction heating apparatus |
August 27, 1985 |
| Apparatus for inductively heating a non-rotating workpiece includes a rotatable spindle of insulating material having a split-ring secondary mounted thereon for rotation therewith and which secondary has opposite ends electrically connected in series with the opposite ends of a multiple |
| 4537102 |
Method of shearing metal billets |
August 27, 1985 |
| A method of hot-shearing an elongated metal bar into sections of given gauge length comprises longitudinally indexing the metal bar to position cross-sectional zones thereof where it is to be sheared successively at a plurality of heating stations at which the shear zones of the bar are |
| 4531987 |
Method for inductively heat treating workpiece bore walls |
July 30, 1985 |
| A method and apparatus of quench hardening to a desired depth the full axial extent of the wall surface, or selected portions of the wall surface, of an axially extending bore in an elongated workpiece wherein the bore has a selected uniform cross-sectional shape throughout the lengt |
| 4531036 |
Apparatus and method for inductively hardening small bores |
July 23, 1985 |
| A method and apparatus for hardening a small internal passage in a workpiece wherein the workpiece is indexed into coaxial alignment between axially spaced inductor coils and an actuator telescopically inserts a magnetically permeable flux concentrating rod through the passage, and c |
| 4511956 |
Power inverter using separate starting inverter |
April 16, 1985 |
| A method and apparatus are provided for an improved power inverter circuit, including a separate starting inverter having an A.C. output applied across a load prior to energizing the main inverter, and driven by a series of repeating gating signals. On achieving a preselected load co |
| 4507722 |
Method and apparatus for controlling the power factor of a resonant inverter |
March 26, 1985 |
| A method and apparatus for controlling the frequency of a power inverter for converting D.C. current into A.C. current having a frequency controlled by gating signals, which apparatus and method includes a load voltage detector for deriving a voltage wave; a load current detector for |
| 4501942 |
Method and apparatus for uniform induction heating of an elongated workpiece |
February 26, 1985 |
| Method and apparatus for uniformly heating a workpiece such as a sucker rod or the like having a uniform cross-section over a major portion of its length and an enlargement adjacent each end thereof. A multi-turn inductor is coaxially disposed around a portion of an elongated workpath wi |
| 4482879 |
Transformer core cooling arrangement |
November 13, 1984 |
| A transformer having a laminated core and a coil enclosing a leg portion of the core, has a thin plastic frame means interleaved between an adjacent pair of core laminations in liquid-tight relation therewith to form, with the pair of core laminations, a completely enclosed internal pass |
| 4482793 |
Apparatus for simultaneously heating a plurality of elongated workpieces |
November 13, 1984 |
| A device for inductively heating simultaneously and alike a plurality of identical elongated workpieces each having at least two axially spaced portions, to produce identical predetermined heat profiles in the workpiece throughout their longitudinal extents. The workpieces are convey |
| 4475839 |
Sucker rod fitting |
October 9, 1984 |
| A sucker rod fitting for connecting together in an end-to-end relationship a plurality of sucker rods to form a sucker rod string for driving a pump in an oil well by an above ground oil pumping unit, the fitting comprising an elongated body having a central bore extending from an open e |
| 4468549 |
Induction heater arrangement for forging bar stock |
August 28, 1984 |
| An induction heating arrangement for heating an end length of a forging bar following the cut-off therefrom of a previously heated and forged end length is arranged to heat the end length to a uniform temperature despite the existence of a residually heated terminal end from the previous |
| 4468010 |
Method and apparatus for quench hardening thin-walled, elongated workpieces |
August 28, 1984 |
| A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface wherein the bore has a selected, uniform cross-sectional shape, which method and apparatus in |
| 4458127 |
Inductor for annealing work hardened portions of structural beams |
July 3, 1984 |
| A method and inductor are provided for annealing the corners of an elongate hollow structural beam in which the corners become work hardened when the beam is produced by cold working initially flat metal plate to the hollow beam configuration. The corners of the beam are inductively heat |
| 4438310 |
Method and apparatus for inductively heating valve seat inserts |
March 20, 1984 |
| 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 reciprocal movement axially toward and |
| 4433226 |
Method and apparatus for induction heating of an elongated workpiece |
February 21, 1984 |
| A method for uniformly heating a workpiece such as a sucker rod or the like having a uniform cross-section over a major portion of its length and an enlargement adjacent each end thereof. A multi-turn inductor is coaxially disposed around an elongated workpath with the rod being longitud |
| 4420667 |
Induction heating method and apparatus for elongated workpieces |
December 13, 1983 |
| Elongated workpieces having an extended intermediate portion of substantially uniform cross-section and axially spaced end or other portions of enlarged cross-section are inductively heated to a desired surface temperature by axially moving them at a continuous rate of speed coaxiall |
| 4419149 |
Method for quenching heated workpieces |
December 6, 1983 |
| A method and apparatus for quenching heated elongated workpieces by rotatably mounting the heated workpiece in a quench tank and subsequently rapidly flooding the tank with a quenching liquid. The heated workpiece is mounted within the quench tank by engaging opposite axial ends of the |
| 4418259 |
Method and apparatus of uniform induction heating of an elongated workpiece |
November 29, 1983 |
| A method for uniformly heating an elongated workpiece having a first portion with uniform cross-section over a major portion of the workpiece length and a second portion having a larger cross-section than the first portion. A multi-turn inductor is operatively mounted on a carriage or th |
| 4401486 |
Method for annealing work hardened portions of structural beams |
August 30, 1983 |
| A method and inductor are provided for annealing the corners of an elongate hollow structural beam in which the corners become work hardened when the beam is produced by cold working initially flat metal plate to the hollow beam configuration. The corners of the beam are inductively heat |
| 4401485 |
Method for inductively heating thin-walled elongated workpieces |
August 30, 1983 |
| A method and apparatus of quench hardening to a desired depth the inner surface of an axially extending bore in an elongated, thin-walled workpiece having an outer, axially extending surface wherein the bore has a selected, uniform cross-sectional shape, which method and apparatus in |
| 4385348 |
Inverter with improved power factor control |
May 24, 1983 |
| There is provided an improvement in a power inverter for converting D.C. voltage into an alternating voltage by alternating gating D.C. current across a load. This type of inverter employs a gating circuit for providing gating signals in two sets of switches at a frequency which cont |
| 4370703 |
Solid state frequency converter |
January 25, 1983 |
| A plurality of SCR diamond bridge circuits are coupled in series to generate frequencies higher than the individual operating frequencies of the SCR's. The series chain of diamond circuits is preferably coupled in parallel with the series combination of a DC blocking capacitor and an |
| 4336924 |
Apparatus for quenching heated workpieces |
June 29, 1982 |
| A method and apparatus for quenching heated elongated workpieces by rotatably mounting the heated workpiece in a quench tank and subsequently rapidly flooding the tank with a quenching liquid. The heated workpiece is mounted within the quench tank by engaging opposite axial ends of the |
| 4317978 |
Induction heater arrangement for forging bar stock |
March 2, 1982 |
| An induction heating system for heating an end length of a forging bar following the cut-off therefrom of a previously heated and forged end length is arranged to bring the end length to be heated to a uniform temperature despite the existence of a residual hot end portion from the p |
| 4307278 |
Control device for parallel induction heating coils |
December 22, 1981 |
| A device for controlling the heat generated by induction coils in a multiple induction heating coil furnace. Multiple induction coils provide parallel cylindrical passages having axial lengths and fixed diameters through which elongated workpieces are movable in the axial direction. The |
| 4266109 |
Floating valve seat inductor |
May 5, 1981 |
| 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 element. This floating inductor asse |
| 4258241 |
Slot furnace for inductively heating axially spaced areas of a workpiece |
March 24, 1981 |
| An induction heating inductor is provided for use in a slot type of furnace to heat axially spaced portions of an elongated workpiece. This inductor includes first and second generally rigid, elongated input members normally fixed with respect to each other and extending generally parall |
| 4251707 |
Inductor for axially and circumferentially heating a rotating workpiece |
February 17, 1981 |
| An inductor coil is provided for inductively heating a hollow automotive front wheel spindle which has axially extending outer surface areas of different radial thickness. The coil has a single loop between the terminal ends thereof defined by circumferentially extending arcuate indu |
| 4251705 |
Inductor for hardening gear teeth |
February 17, 1981 |
| An inductor for heating the circumferentially opposed working surfaces and the root surface between adjacent gear teeth includes a nose portion received between the adjacent teeth and having a profile corresponding to that of the working and root surfaces. The nose portion is comprised o |
| 4251704 |
Unit for induction heating and hardening gear teeth |
February 17, 1981 |
| An induction heating unit is disclosed which is operable to inductively heat and harden teeth on circumferentially extending radially thin flange segments of a gear. The unit includes an inductor conforming in circumferential contour and length to the flange segment and having radial |
| 4195213 |
Feeding mechanism for induction heating coil |
March 25, 1980 |
| Feeding means for successively advancing elongated workpieces step-by-step, through the central workpiece receiving passage in a multiturn induction heating coil with a workpiece supporting slide track extending therethrough, has an elongated workpiece pusher member extending longitu |
| 4191363 |
Quenching device for inductively heated workpieces |
March 4, 1980 |
| A device for directing quench fluid onto the top of an inductively heated surface portion of a rotating workpiece has a supply means having an outlet end spaced horizontally from said surface portion for directing a jet of quench fluid therefrom and a deflector for intercepting and guidi |
| 4184798 |
Workpiece rotating and feeding apparatus |
January 22, 1980 |
| Apparatus is provided for simultaneously rotating and axially feeding an elongated workpiece past an induction heating inductor. The apparatus includes a collet having a passageway therethrough defined in part by radially displaceable fingers normally providing an opening of a diameter |
| 4123644 |
Device for inductively heating cylindrical surfaces |
October 31, 1978 |
| A device for inductively heating a cylindrical metal surface on an elongated workpiece having a central rotational axis, wherein the cylindrical surface is generally concentric with the axis. The device comprises an inductor having a generally cylindrical coupling surface matching th |
| 4122321 |
Induction heating furnace |
October 24, 1978 |
| An apparatus for heating an elongated workpiece having an elongated axis and moving along a heating path in a selected linear direction, the path having opposite sides defining a workpiece passage therebetween. This apparatus comprises a plurality of high permeability flux directing |
| 4114010 |
Test circuit and method for matching an induction load to a solid state power supply |
September 12, 1978 |
| An auxiliary electrical test circuit is provided which is adapted to assist in matching the resonant frequency of an induction heating load with the rated frequency range of a solid state high frequency power source coupled to the load circuit. The load circuit includes an inductor, powe |
| 4090698 |
Method and apparatus of inductively heating elongated workpieces |
May 23, 1978 |
| A device for heating an elongated workpiece having a central axis which device comprises first and second axially spaced and axially aligned multiturn induction heating coils, each of which has a workpiece receiving passage extending therethrough. Means are provided for indexing a wo |
| 4086464 |
Resistance heating device with improved workpiece feeding mechanism |
April 25, 1978 |
| In a device for resistance heating of an elongated, generally cylindrical metal workpiece preparatory to quench hardening wherein the workpiece has a central, elongated axis and axially spaced first and second ends. The heating device includes first and second axially spaced electrode me |
| 4039794 |
Apparatus and method for heating ferromagnetic abrasive shot |
August 2, 1977 |
| There is provided an apparatus and method for heating ferromagnetic abrasive shot to a selected temperature substantially above the Curie Point temperature of the metal forming the shot. An elongated generally cylindrical retort, having a central axis and a central passage and being |
| 4006337 |
Apparatus and method for heating a gun barrel bore |
February 1, 1977 |
| An apparatus and method for heating the elongated, generally cylindrical surface of the internal elongated bore of a gun barrel preparatory to quench hardening of the cylindrical surface. There is provided a generally cylindrical inductor extending through the gun bore with electrical |
| 3988179 |
Method and apparatus for inductively heating elongated workpieces |
October 26, 1976 |
| There is provided a method and apparatus for inductively heating elongated workpieces having a central axis and mounted in workpiece receiving stations of an indexable turret. A single shot inductor located within the path generally followed by the indexing workpieces is used to heat the |
| 3986710 |
Quench unit for inductively heated workpieces |
October 19, 1976 |
| Apparatus for quench hardening the surface of a previously inductively heated, elongated workpiece as it moves along a feed path, this apparatus comprises a quenching means surrounding the feed path, the quenching means includes an inwardly facing apertured wall facing the feed path, mea |
| 3970813 |
Apparatus for inductively heating the end of an elongated workpiece |
July 20, 1976 |
| A method and apparatus for inductively heating the axial, generally circular end of at least two elongated workpieces having central axes wherein the ends terminate in generally flat surfaces perpendicular to the axes. The method and apparatus includes locating the workpieces in side |
| 3944446 |
Method of inductively heating and quench hardening camshafts |
March 16, 1976 |
| A method of inductively heating and quench hardening an elongated camshaft having a central axis, an elongated body portion, at least three axially spaced bearing surfaces on the body portion, and axially spaced cam surfaces on the body portion and encircling the axis, this method co |
