| 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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| 07/23/1991 | US5034589 Electrical discharge apparatus for producing a textured finish on a conductive surface |
| 07/23/1991 | US5034121 Apparatus for preparing a machining liquid of an electroerosion machine |
| 07/10/1991 | EP0436029A1 Pulse controller of electric discharge machine |
| 07/09/1991 | US5029759 Curved hole machining method and fuel injector formed thereby |
| 07/03/1991 | EP0178330B1 Power source for wire cut electrospark machining |
| 07/02/1991 | US5028319 Apparatus for the preparation of machining liquid for an electroerosion machine |
| 06/13/1991 | WO1991008078A1 Power supply circuit for electric discharge machine |
| 06/12/1991 | EP0431005A1 Apparatus and method for producing three-dimensional objects |
| 06/11/1991 | US5023421 Device for limiting the withdrawal of the electrode of a die sinking machine |
| 06/05/1991 | CN1012717B Electric spark processing pulse power supply of ignition |
| 05/28/1991 | US5019685 Discharge working machine |
| 05/28/1991 | US5019683 Electroerosive drilling of holes with working fluid system |
| 05/22/1991 | EP0427876A1 Electric spark machining electrode and method of production thereof |
| 05/15/1991 | EP0426870A1 Jump control system of electric spark machine |
| 05/14/1991 | US5015404 Oil composition containing hydrogenated oil |
| 05/07/1991 | US5013882 Labyrinth filter for dielectric of spark erosion systems |
| 05/02/1991 | DE3935695A1 Erosion electrode mfg. device - has rapid hardening adhesive for bonding aligned surfaces of shaft and pre-fabricated electrode |
| 04/24/1991 | CN2075565U Electric discharge machining electrode |
| 04/18/1991 | WO1991004820A1 Working fluid usable for both of cutting and electric discharge machining |
| 04/16/1991 | US5008509 Production method of honeycomb die-forming electrical discharge machining electrodes and production method of honeycomb dies |
| 04/09/1991 | US5006685 Machine tool with grinding function and truing/dressing method of grinding stone using it |
| 04/06/1991 | WO1991005032A1 Oil composition |
| 04/06/1991 | CA2042604A1 Oil compositions |
| 04/02/1991 | US5004530 Discharge machining apparatus with liquid flow control |
| 03/28/1991 | DE4029578A1 Power supply system for electrical discharge machine - has switched circuit supplies that are changed over dependent upon detector |
| 03/20/1991 | EP0417289A1 Electric discharge machine equipped with control information display function |
| 03/13/1991 | EP0416541A1 Electrode for electric discharge machining |
| 03/13/1991 | CN2072878U Electric arc machine of corroding removing |
| 03/05/1991 | US4996762 Composite processing machine |
| 02/27/1991 | CN1049466A Power supply circuit for discharge machining |
| 02/21/1991 | WO1991001840A1 Pulse controller of electric discharge machine |
| 02/20/1991 | CN1011673B Pulse generator for spark-erosive metal working |
| 02/13/1991 | EP0412262A1 Waveform control device for electrical discharge machining apparatus |
| 02/12/1991 | US4992641 Apparatus for preparing a machining liquid of an electroerosion machine |
| 01/31/1991 | DE3924398A1 DC supply unit with fast response and freedom from transients - uses pulse width control of multiple DC sources connected in series and smoothed |
| 01/24/1991 | WO1991000791A1 Device, standard blanks and standardized electrodes for milling by electroerosion |
| 01/16/1991 | EP0407600A1 Working liquid feeding apparatus for wire cut electric discharge machine |
| 01/09/1991 | EP0406918A2 Method and apparatus for electric discharge machining |
| 01/08/1991 | US4983800 Interelectrode distance controlling device in electric discharge machining apparatus |
| 12/26/1990 | CN1010927B Spark erosion machine with a fixed machine table and lowerable working container for the electrolyte |
| 12/26/1990 | CN1010926B Method for controlling withdrawal movement of countersink electrode in electroerosion machine |
| 12/25/1990 | US4980533 Method and apparatus for electroerosive cutting |
| 12/25/1990 | US4980532 Machining time estimating device for electric discharge machining operation |
| 12/25/1990 | US4980036 Ultrasonic machining method |
| 12/19/1990 | EP0402840A1 Method and apparatus for non-contact machining with dynamic feedback control |
| 12/18/1990 | US4978829 Electric discharge machining power supply circuit |
| 12/18/1990 | US4978827 Machining tank with decomposed gas removal |
| 12/13/1990 | WO1990014918A1 Electric spark machining electrode and method of production thereof |
| 12/13/1990 | WO1990014917A1 Generator for the spark-erosion cutting of metal workpieces by means of a liquid or solid electrode |
| 12/13/1990 | DE3919123A1 Electrical control circuit for spark-erosion machining unit - has electrode and workpiece forming transverse branch of bridge circuit such that current direction can be reversed |
| 12/12/1990 | EP0401415A1 Power supply for the spark erosion cutting of metal work pieces by means of an electrode made of liquid or solid material |
| 11/29/1990 | WO1990014193A1 Jump control system of electric spark machine |
| 11/27/1990 | CA1277009C Method and apparatus for electric discharge machining with adaptive feedback for dimensional control |
| 11/07/1990 | CN1010291B Circuit arrangement for producing eroding pulses on spark erosion installation |
| 10/31/1990 | EP0394482A1 Working fluid temperature abnormality alarm apparatus of electric discharge machine |
| 10/30/1990 | US4967054 Electric-discharge-machining power source |
| 10/17/1990 | EP0392074A1 Discharge working machine |
| 10/17/1990 | CN2063851U Spindle head integral level motion gear of spark machine |
| 10/10/1990 | EP0391446A1 Device for electric spark machining of one or more blanks |
| 10/04/1990 | DE4007985A1 Aq. compsn. contg. fatty acid amide and saccharide |
| 09/26/1990 | EP0389221A1 Production method of honeycomb die-forming electrical discharge machining electrodes and production method of honeycomb dies |
| 09/04/1990 | CA1273683A1 Device for electrical discharge piercing of holes in components |
| 08/28/1990 | US4952790 Electrical discharge machining control circuit |
| 08/28/1990 | US4952768 One-piece, solid, smooth surface |
| 08/28/1990 | US4952767 EDM with an electromagnetic shield of hollow ferrite beads floating on dielectric fluid |
| 08/21/1990 | US4950860 Electro-discharge machining apparatus |
| 08/16/1990 | DE4002810A1 Spark-eroding machine with workpiece holder and movable electrode - has rotatable electrode cutter and thrust units to avoid need periodically to interrupt machine process |
| 08/14/1990 | US4948625 Method for forming surface layer by electric discharge process |
| 08/08/1990 | EP0380694A1 Device for supplying a machining solution to a discharge machining apparatus |
| 08/02/1990 | DE3902191A1 Apparatus for the electrical discharge machining of workpieces |
| 07/31/1990 | US4945199 Electric discharge machining method and device |
| 07/25/1990 | CN1008891B Multifunction plate-cutting machine with electrosparking cutting disk |
| 07/11/1990 | CN1043805A Apparatus and method for producing three-dimensional objects |
| 07/10/1990 | US4940872 Electric discharge machining circuit |
| 07/04/1990 | EP0375774A1 Device for electro-erosive piercing of openings in parts |
| 07/03/1990 | US4939334 Method for the controlled withdrawal of a countersinking electrode in an electroerosion machine |
| 06/26/1990 | CA1270910A1 Electrical discharge machining center |
| 06/20/1990 | CN1008428B Electroerosion process and electroerosion machine for performing the process |
| 06/19/1990 | US4935594 Eroding electrode, in particular a wire electrode for the sparkerosive working |
| 06/14/1990 | WO1990006202A1 Working liquid feeding apparatus for wire cut electric discharge machine |
| 06/13/1990 | EP0373154A1 Electrical discharge methods and apparatus therefor |
| 06/13/1990 | EP0372475A1 Wire electrical discharge machine |
| 06/06/1990 | EP0371962A1 Electro-discharge machining apparatus |
| 06/05/1990 | CA1270043A1 Electrical discharge machining center |
| 05/30/1990 | EP0370950A1 Wire-cut electric discharge machine |
| 05/23/1990 | EP0369949A2 Control circuit for the machining current of an electroerosion machine |
| 05/17/1990 | WO1990005040A1 Electric discharge machine equipped with control information display function |
| 05/16/1990 | EP0368833A1 Method for reducing the wear of the electrode in machine tools using electro-erosion |
| 05/16/1990 | EP0368394A1 Device for limiting the tool electrode withdrawal of a working machine and its use in electroerosion |
| 05/16/1990 | EP0174372B1 Power source for electric discharge machining |
| 05/14/1990 | EP0353301A4 Device for making holes in work pieces by electro-erosion. |
| 05/10/1990 | DE3837913A1 Electrical discharge machining unit |
| 05/09/1990 | EP0366799A1 Power source for electric discharge machining |
| 05/03/1990 | WO1990004479A1 Working fluid temperature abnormality alarm apparatus of electric discharge machine |
| 05/02/1990 | EP0166786B1 Positioning apparatus for electric discharge machine |
| 05/02/1990 | EP0150220B1 Contact sensing apparatus for an electric discharge machine |
| 05/01/1990 | US4922076 Electro-discharge machining electrode |
| 04/25/1990 | EP0364591A1 Electric discharge machining apparatus preventing electrolytic corrosion by short-circuit detection voltage |
| 04/19/1990 | WO1990003866A1 Method and apparatus for adaptive control of machining apparatus |
| 04/18/1990 | CN1007602B Formating and shaving method for grinding wheel of metallic binder |