Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 8143550 | Device for controlling the on and off time of the metal oxide semiconductor field effect transistor (MOSFET), a device spark coating the surfaces of metal workpiece incorporating the said control device and a method of coating metal surfaces using the said device The present invention is a device for coating surfaces of metallic work pieces with an electrically conductive material by employing short duration high current packets of pulses in which the work piece forms the cathode and the consumable coating material forms the... | 03/27/2012 |
| 7952045 | Material piece scooping device A material piece scooping device, which extracts a material piece from a surface of an object to be scooped by cutting electric discharges between an electric discharge electrode and the object to be scooped, includes a rotation drive section 40, an arm porti... | 05/31/2011 |
| 7906743 | Gradation twin-wire EDM manufacturing system A gradation twin-wire EDM manufacturing system includes a manufacture machine, a wire feeding bobbin set mounted on the manufacture machine, a wire receiving bobbin set mounted on the manufacture machine, a gradation electro-insulated roller mounted on the manufactu... | 03/15/2011 |
| 7518081 | Electric discharge machining apparatus An electric discharge machining apparatus includes a guide electrode that is tubular and receives a small-diameter wire electrode for electric discharge machining. The small-diameter wire electrode can freely slide within the guide electrode. A guide electrode holde... | 04/14/2009 |
| 7301116 | Programmed electrode wear compensation device and method for 3D EDM scanning apparatus A programmed electrode wear compensation device and method for 3D EDM scanning apparatus has a compensation device which receives raw data about a working path of a working apparatus from a CAD/CAM device, calculates therefrom compensated data which take into accoun... | 11/27/2007 |
| 7273994 | Electrical discharge machine for improving the guide alignment base structure An electrical discharge machine for improving the guide alignment base structure consisting of a guide alignment base having vertical threaded holes. Furthermore, the guide alignment base has axial adjustment holes that are respectively aligned with the vertical thr... | 09/25/2007 |
| 7262382 | Process of forming conical holes with an electrical discharge machining system An electrical discharge machine is configured to (i) machine at least a portion of a workpiece through electrical discharge between the workpiece and a first machining electrode aligned by the electrode guide; (ii) generate a dressed machining electrode by engaging ... | 08/28/2007 |
| 7249579 | Enhanced permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine A valve actuator for an internal combustion engine is described having a core having a wound coil located therein, said core further having at least one permanent magnet located at least partially inside or outside said coil and positioned at an angle relative to a ... | 07/31/2007 |
| 7247081 | Precision machining apparatus and precision machining method A precision machining apparatus and a precision machining method capable of carrying out grinding with accuracy by performing switching control, for example, on a device for rotating a grinding wheel according to grinding stages through the amount of movement and co... | 07/24/2007 |
| 7241962 | Electrical discharge texturing machine A low cost electrical discharge texturing machine which can texture work rolls having a broad range of diameters and lengths either on a production or research and development basis. The machine is relatively portable, for example, it can be mounted on a palate, and... | 07/10/2007 |
| 7214901 | Duplex electrical discharge machining An electrical discharge machine includes first and second coaxial electrodes and corresponding carriages. A liquid dielectric is channeled between the electrodes and a workpiece which are suitably electrically powered for machining a duplex hole in the workpiece. | 05/08/2007 |
| 7202439 | Small-hole electrical discharge machining device and multiple diesinking-and-small-hole electrical discharge machining device, and method for multiple diesinking-and-small-hole electrical discharge machining with the same device A small-hole electrical discharge machining device comprises a diaphragm which can be moved up and down along a notch window provided in a work tank for mounting a work in the work tank in which a working fluid can be filled or discharged, and adjusts the height of ... | 04/10/2007 |
| 7202441 | Method for producing a hole in a body, specifically an injection hole in a fuel injector A method for producing a hole in a body, especially an injection hole in a fuel injector is disclosed. The hole (L) is first produced by a percussion boring process or a trepanation boring process using a laser. The percussion boring process lasts less than 3 second... | 04/10/2007 |
| 7189145 | Method of and apparatus for producing roll A belt grinding is integrated with an electroerosion machine for contouring the working surface of a mill roll and providing a texture thereon. The belt grinder can superfinish the roll and remove peaks in the surface without significantly affecting the mean surface... | 03/13/2007 |
| 7163443 | Method, tool, and matching equipment for producing dental prosthetic items A tool for use in machining equipment for machining a item from a workpiece via longitudinal and transverse movement includes stepped regions having different diameters, each provided with a lateral surface for transverse lateral machining and a front surface for lo... | 01/16/2007 |
| 7138806 | Position detection The invention relates to a device for detecting the position of a rotor relative to a stator, wherein at least one electrode is arranged on the rotor and at least one electrode is arranged on the stator, such that the electrodes at least partially overlap in at leas... | 11/21/2006 |
| 7124720 | Permanent magnet electromagnetic actuator for an electronic valve actuation system of an engine A valve actuator for an internal combustion engine is described having a core having a wound coil located therein, said core further having at least one permanent magnet located at least partially inside said coil and positioned at an angle relative to a direction o... | 10/24/2006 |
| 7048659 | Gear shift device for bicycles A motorized bicycle gear shift device comprising a derailleur and an electric motor, associated directly with the derailleur, for controlling the derailleur and an electric transducer of absolute type, also associated with the derailleur for producing an electric si... | 05/23/2006 |
| 7044830 | Numeric controller A chopping control process, for controlling a machine tool during chopping, i.e., shaping or cutting a workpiece, is allowed without adding an extra axis dedicated just to the chopping, i.e., a chopping dedicated axis. To correct a chopping operation (i.e., an opera... | 05/16/2006 |
| 7041933 | Complex hole shaping A method for forming a complex hole through a wall of a structure. The complex hole has a smaller cross-sectional area within the wall and an outer portion with a larger cross-sectional area adjacent a first surface of the wall. The complex hole further has an inner... | 05/09/2006 |
| 7030332 | Monitoring electrode condition in an electro-discharge machine A method and device for monitoring the condition of an electrode in an electro-discharge machine are disclosed. The device includes an electrode detector operable to produce a position signal indicative of the position of an end region of the electrode in the nose-g... | 04/18/2006 |
| 7019247 | Electrical discharge machine apparatus with piezo-electric head An electrical discharge machining head incorporating piezo-electric motors for controlling motion of a slide assembly. The slide assembly is translatable within a machine base and its motion is controlled by the piezo-electric motors. The slide assembly precisely co... | 03/28/2006 |
| 7019245 | Method and apparatus for erosion machining with an electrical contact element Apparatus and method for erosion machining a structure comprising one of a metallic structural component, a metallic insert element, and a connecting element, by way of erosion. The apparatus includes an eroding head including an electrode, a power supply, and a con... | 03/28/2006 |
| 7015411 | Erosion system having an erosion head for removing metallic connection elements Spark erosion system for removing connection elements from a structure (W, 60), having a drill head (3) [(4)?], a rotational drive (10) by means of which a tool is caused to rotate, a positioning system (15) for moving the tool as ... | 03/21/2006 |
| 7012212 | EDM drill An EDM drill comprised of an automated electrode tube replacing means to allow fully automated and continuous working on holes; and further comprised of an electrode tube guide selection device to allow fully automated and continuous working on holes of various diam... | 03/14/2006 |
| 7009134 | Electrode guide for spark-erosion machines and a method for the spark-erosion of workpieces An electrode guide and a method for the spark-erosion of workpieces are disclosed. The electrode guide (1), consisting of a two-piece prism-shaped (2, 3) guide with a pretensioning device (6), enables an electrode (4) to be guided in a pl... | 03/07/2006 |
| 7004693 | Tool, tool holder, and machine tool A tool attachable to a spindle of a machine tool by an automatic tool changer in the same way as an ordinary tool, capable of being driven without connecting with an external power supply etc., and able to rotate at a rotational speed different from than that of the... | 02/28/2006 |
| 6979795 | Sinker electric discharge machine jump control device A sinker electric discharge machine jump control device for reciprocating a tool electrode along a Z-axis with respect to a workpiece using a servo motor in order to expel contaminated fluid from a work gap. The jump control device includes a commanded current gener... | 12/27/2005 |
| 6969817 | Apparatus and method for machining in confined spaces A machining apparatus is provided. The machining apparatus includes a discharge machining head assembly and a slide assembly supporting the head assembly. The machining apparatus also includes an electromagnet configured to support the slide assembly in a position o... | 11/29/2005 |
| 6933456 | Small hole electrical discharge machining method and small hole electrical discharge machining apparatus and electrode inserting method and electrode inserting apparatus A small hole electrical discharge machining apparatus includes an electrode holder that holds an upper part of an electrode, an electrode guider that guides a lower part of the electrode, a jet nozzle that injects water jet to the electrode holder, and a fluid chann... | 08/23/2005 |
| 6921877 | EDM drill An EDM drill is provided which includes an automated electrode tube replacing mechanism for fully automated and continuous operation. The EDM drill further includes an electrode tube guide selection device to allow the fully automated and continuous operation on hol... | 07/26/2005 |
| 6920370 | Method and device for disturbance sensing, especially collision sensing, in the drive system of a numerically controlled machine tool A method and device for disturbance sensing in the drive system of a numerically controlled machine tool or similar device is disclosed, in which at least one drive motor for positioning of a machine part being moved such as an advance slide or an X/Y cross-slide is... | 07/19/2005 |
| 6902362 | Machine tool In an automatic machine tool (1) comprising a spindle mounting slide (4) which is driven by a linear electric motor (9) in a vertical direction (V) in a slideway (8), the slide (4) is equipped with a counterweight device (13... | 06/07/2005 |
| 6881918 | Electric discharge machining apparatus An electric discharge machining apparatus has improved responsive drivability and improved machining speed. A tool electrode has a tip end directed toward a work piece, a voltage applied between the tool electrode and the work piece generating a discharge. A drive s... | 04/19/2005 |
| 6833524 | Multi-station electrical discharge machining with manufacturing interrupt reduction An electrical discharge machining apparatus is provided with at least two work stations. A first servomotor is mounted above the first and second work stations, and a second servomotor mounted to the first servomotor so as to be selectively positioned over either of... | 12/21/2004 |
| 6831246 | Multi-station electrical discharge machining with single velocity command An electrical discharge machining (EDM) apparatus includes a plurality of machining heads, at least one EDM control system, and a plurality of programmable servo drives. Each one of the programmable servo drives is connected to the EDM control system and to a respec... | 12/14/2004 |
| 6809283 | Noble metal in-situ sampling method and apparatus An electric discharge machining sampling apparatus for obtaining samples from a surface of metal components provided. In an exemplary embodiment, the sampling apparatus is operable underwater and includes a base plate and an electrode assembly movably coupled to the... | 10/26/2004 |
| 6809285 | Micro electro discharge machining method and apparatus In a micro electro discharge machining method and apparatus, the shapes of minute holes are transferred to a tool electrode through a plate electrode serving as an intermediate electrode, and a workpiece is machined using the tool electrode. As a result, the time fo... | 10/26/2004 |
| 6808604 | Discharge surface treatment electrode, manufacturing method thereof and discharge surface treating method WC powder (11) and W powder (12) are mixed and entered in a press mold and compressed and molded, thereby forming a discharge surface treatment electrode (10). Discharge is caused to occur between the discharge surface treatment electrode (10... | 10/26/2004 |
| 6806435 | Small hole electric discharge machine drill provided with depth-specific processing means A small hole electric discharge machine drill is provided with a depth-specific processor and a tiltable unit operable in fluid. The turntable unit includes a first axis with a first center of rotation and a second tilting axis with a second center of rotation. The ... | 10/19/2004 |
