| Patents for B23H 1 - Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric (3,662) |
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| 01/07/1993 | EP0521193A2 Wire-cut electric discharge machine |
| 01/06/1993 | CN2126512Y Directly pulling electric spark machine |
| 01/05/1993 | US5177335 Prefilter for EDM machine |
| 12/30/1992 | CN1019645B Apparatus for preparation of machining liquid for electroerosion machine |
| 12/23/1992 | EP0519028A1 Device for cleansing the machining fluid for a spark-erosion or electrochemical processing machine |
| 12/15/1992 | US5171957 Generator for electric discharge machining of metallic work pieces by means of an electrode consisting of liquid or solid material |
| 12/15/1992 | US5171956 Electric discharge machine capable of preventing electrolytic corrosion attributable to a short-circuit detecting voltage |
| 12/10/1992 | WO1992021475A1 Electric spark discharge machine |
| 12/10/1992 | CA2109569A1 Electric spark discharge machine |
| 12/09/1992 | EP0375774B1 Device for electro-erosive piercing of openings in parts |
| 12/03/1992 | DE4117775A1 Densifying parts of tungsten@-copper@ composite material - by heating and isostatic pressing with inert gas of tungsten@-copper@ preforms, esp. for mfg. spark erosion electrodes for tools and dies |
| 11/25/1992 | EP0514895A1 Electrical discharge power supply circuit |
| 11/19/1992 | EP0513664A1 Machining apparatus, in particular for electric discharge machining, and method of machining work pieces |
| 11/11/1992 | CN2121294U Programmable electric spark wire-cutting pulse power supply |
| 11/10/1992 | US5162631 Power supply unit for electrical discharge machine |
| 10/28/1992 | CN2119982U Flexible lift for machine tool working oil groove |
| 10/21/1992 | CN1018723B Servocontrol mechanism of electroerosion machine |
| 10/14/1992 | EP0508086A2 Electrospark machining pulse generator and method of using it |
| 10/07/1992 | EP0507560A2 Electric discharge machines |
| 10/07/1992 | CN1065110A Sieve plate machining method |
| 10/07/1992 | CN1018531B Method for controlled withdrawal of a countersinking electrode in electroerosion machine |
| 09/30/1992 | CN1064829A Pulse generator for electron discharge machining and method suitable for this |
| 09/22/1992 | US5150102 Machining fluid temperature deviation alarm |
| 09/22/1992 | US5149931 Power source for electric discharge machining |
| 09/15/1992 | US5147995 Discharging circuit arrangement for an electrical discharging machine |
| 09/08/1992 | US5146061 Electrode for an electric discharge machining apparatus |
| 08/05/1992 | CN1017691B Method and apparatus for electroerosive working of workpieces |
| 07/30/1992 | DE4102250A1 Electro-erosion - uses dielectric contg. carbon@ to give constant conductive working edge zone on workpieces of low or no electrical conductivity |
| 07/30/1992 | DE4101701A1 Filter fuer werkzeugmaschinen Filters for machine tools |
| 07/29/1992 | EP0495985A1 Method and apparatus for electrical discharge machining |
| 07/29/1992 | EP0353301B1 Device for making holes in work pieces by electro-erosion |
| 07/29/1992 | CN2111161U Discharge treating machine and its electrode clamping head correcting device |
| 07/28/1992 | US5134428 Drive circuits for spark-discharge imaging apparatus |
| 07/23/1992 | WO1992011968A1 Drive circuits for spark-discharge imaging apparatus |
| 07/23/1992 | WO1992011923A1 Device for cleansing the machining fluid for a spark-erosion or electrochemical processing machine |
| 07/08/1992 | CN2109278U Multi-head independent electric discharging machine |
| 07/08/1992 | CN1062489A Chip removing device of electro-discharge machine |
| 07/01/1992 | EP0293484B1 Apparatus for discharge machining |
| 06/30/1992 | US5126525 Power supply system for electric discharge machines |
| 06/03/1992 | EP0488187A2 Electrical discharge machine with machining gap voltage control |
| 06/02/1992 | US5118915 Electric discharge machine |
| 05/26/1992 | US5117083 Jump control system for an electric discharge machine |
| 05/20/1992 | EP0485947A2 Electrical discharge machining control unit |
| 05/20/1992 | CN1061175A Electric machining installation |
| 05/13/1992 | EP0485365A1 Device for mounting an electrospark machining electrode |
| 05/06/1992 | EP0483867A2 Method of discharge processing of semiconductor |
| 05/05/1992 | US5111017 Power supply circuit for discharge machining |
| 04/29/1992 | EP0286685B1 Method of controlling wire cut discharge machining |
| 04/29/1992 | CN2102815U Portable adhesive discharge process device |
| 04/28/1992 | US5108555 Electrode for electrical discharge machining and process for manufacturing the same |
| 04/15/1992 | CN2101545U Precise electric spark machine tool for large circular workpiece |
| 03/25/1992 | EP0476155A1 Liquid level regulator of discharge machining tank |
| 03/25/1992 | EP0476153A1 Inverter-controlled device for cooling cutting fluid |
| 03/20/1992 | CA2051093A1 Electric discharge machine with multiple tool electrodes |
| 03/05/1992 | WO1992003246A1 Method and apparatus for electrical discharge machining |
| 03/04/1992 | EP0276314B1 Discharge machining controller |
| 02/25/1992 | US5091620 Automatic electric discharge machining method and apparatus with periodic sensing of surface roughness of the workpiece |
| 02/18/1992 | US5089681 Electro-discharge machining apparatus |
| 02/12/1992 | CN2095726U Multi-source synchronous working discharging machine |
| 02/05/1992 | EP0469471A2 Adaptive control unit for electrical discharge machine |
| 02/04/1992 | US5085247 Machining fluid supply device for a wire cut electric discharge machine |
| 01/29/1992 | EP0283523B1 Device for control of feeding the electrode tool in electro-erosion machine tools |
| 01/23/1992 | DE4023253A1 Harmonic-free DC power supply for bipolar load - uses concreted shorting of several sources of direct current sharing same deg. of pulse width modulation |
| 01/21/1992 | US5083001 Waveform control device for electrical discharge machining apparatus |
| 01/14/1992 | US5081333 Electric discharge machining fluid with a fatty acid amide additive for rust inhibition |
| 01/14/1992 | US5081332 Electrical discharge machine with a management information display function |
| 01/07/1992 | US5078256 Machine tool having a chip collecting apparatus |
| 01/07/1992 | US5078234 Oil basin for electric discharge machine |
| 12/24/1991 | US5075530 Multi-head type of electro-discharging machine |
| 12/10/1991 | US5071567 Buffer reservoir or second filter connected in parallel with first filter |
| 12/03/1991 | US5070224 Portal construction |
| 11/12/1991 | US5064984 Power supply unit electric discharge machining apparatus |
| 11/07/1991 | DE4014302A1 Variable DC supply for two pole appts. - has parallel sources with short circuit switches and series decoupling diodes allowing adjustment in stages |
| 11/06/1991 | EP0185101B1 Power source for discharge machining |
| 10/30/1991 | CN1055684A Integrated gapbox for electrosive machining apparatus |
| 10/30/1991 | CN1055683A System for control of flushing flow in spark discharhe machine |
| 10/29/1991 | US5061354 Consumable electrode in dielectric liquid; forming submicron sized powder |
| 10/17/1991 | WO1991015326A1 Inverter-controlled device for cooling cutting fluid |
| 10/17/1991 | WO1991015325A1 Liquid level regulator of discharge machining tank |
| 10/16/1991 | EP0451350A2 Contact detecting device for positioning relatively movable elements |
| 10/16/1991 | EP0223861B1 Power source for discharge machining |
| 09/25/1991 | EP0447558A1 Oil composition |
| 09/24/1991 | CA1289629C Power supply for discharge machining apparatus |
| 09/18/1991 | CN2084854U Gas generator by electrolysis |
| 09/18/1991 | CN1013940B Method and apparatus for purging eroding zone during electroerosive counter sisnking |
| 09/17/1991 | US5049715 Electric discharge machine |
| 09/17/1991 | US5049257 Fluid for electrical discharge machining |
| 09/04/1991 | EP0444609A2 Integrated gapbox for electroerosive machining apparatus |
| 09/04/1991 | EP0444608A2 System for control of flushing flow in a spark discharge (EDM) machine |
| 09/04/1991 | EP0444160A1 Device, standard blanks and standardized electrodes for milling by electroerosion. |
| 09/04/1991 | CN1013748B Machining method of polycrystalline diamond by using mechano-electrical pull |
| 09/03/1991 | US5045664 Machine tool with grinding function and truing/dressing method of grinding stone using it |
| 09/03/1991 | US5045663 System for control of flushing flow in a spark discharge (EDM) machine |
| 08/21/1991 | EP0442119A2 Method and apparatus for treating the dielectric used in electrical discharge machining |
| 08/20/1991 | US5041709 Attachment device for electrical discharge machine |
| 08/20/1991 | CA1287889C Electric discharge machining apparatus |
| 08/14/1991 | EP0441264A2 Spark erosion electrode and method for manufacturing such an electrode |
| 08/07/1991 | EP0222023B1 Device for confirming formation of holes in discharge machining apparatus |
| 08/06/1991 | US5038012 Electrical discharge process and machining apparatus |
| 07/30/1991 | CA1287119C Electric discharge machining apparatus |