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| Number | Title | Issue Date |
| 8188625 | Oil cooling system for motor An oil cooling system for a motor includes a rotor, a stator core annularly positioned around the rotor, a plurality of coils annularly arranged and each wound around the stator core, and a plurality of oil discharging holes annularly arranged in a circumferential d... | 05/29/2012 |
| 8174164 | System and method for power conversion employing an electrostatic motor driving an electromechanical battery A system for generating electrical power supply signals includes at least one heat engine having a chamber that undergoes heating/cooling cycle and corresponding pressure variations. At least one piezoelectric transducer is deformed in response to the pressure varia... | 05/08/2012 |
| 8174163 | Device for assisting relative movements between two parts of a mechanical system, forming a variable capacitance device A device for assisting a relative movement of two parts of a mechanical system, for example a ball bearing or a gear device, configured to form a device with variable capacity, thereby enabling mechanical energy to be recovered and converted into electrical energy. ... | 05/08/2012 |
| 8164223 | Linear motor mounting structure The present invention provides a magnetic attractive force-offsetting linear motor which prevents motor thrust from varying due to changes in the position on a stator, thus enabling improvement of the motor thrust and of the accuracy of the machine tool and the qual... | 04/24/2012 |
| 8164232 | Mechanical meta-materials The present invention provides meta-materials with an actively controllable mechanical property. The meta-material includes a deformable structure and a set of activation elements. The activation elements are controllable between multiple states. The meta-material i... | 04/24/2012 |
| 8164231 | Electret device comprising electret film formed on main surface of substrate and electrostatic operating apparatus An electret device includes a substrate formed with a plurality of recess portions on a main surface thereof and an electret film so formed on the main surface of the substrate as to cover at least inner surfaces of the recess portions. ... | 04/24/2012 |
| 8159108 | Integrated thermoelectric/ thermionic energy converter A device for converting heat into electrical energy that is an integrated combination of thermionic and thermoelectric energy converters in a single device, or “TITE”. The electron output of thermionic portion of the TITE is the input of the thermoelectric porti... | 04/17/2012 |
| 8138655 | Electrostatic actuator with electrodes having varying distances at different portions An electrostatic actuator includes first and second lower electrodes formed apart from each other above a substrate, an electrode portion formed above the first and second lower electrodes and first and second upper electrodes, a distance between the first upper ele... | 03/20/2012 |
| 8129872 | Low profile d.c. brushless motor for an impeller mechanism or the like An impeller and at least a portion of a cooperating peripheral volute may be integrated are integrally injection molded with, concentric outer rotor and inner stator assemblies, respectively, to achieve a low profile precision impeller mechanism based on an improved... | 03/06/2012 |
| 8120229 | Middle spring supported micro-electro-mechanical transducers A micro-electro-mechanical transducer (such as a cMUT) is disclosed. The transducer has a substrate, a top plate, and a middle spring layer therebetween. The substrate and the middle spring layer define cavities therebetween sidewalled by standing features. The midd... | 02/21/2012 |
| 8110961 | Permanent-magnet-less machine having an enclosed air gap A permanent magnet-less, brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by an alternating current. An uncluttered rotor disposed within the magnetic rotating field is spaced apart from the stator to form an air g... | 02/07/2012 |
| 8102096 | Closely spaced electrodes with a uniform gap An improved design for maintaining separation between electrodes in tunneling, resonant tunneling, diode, thermionic, thermo-photovoltaic and other devices is disclosed. At least one electrode 1 is made from flexible material. A magnetic field B is present to... | 01/24/2012 |
| 8093780 | Micro-oscillation element with adjustable resonance frequency of oscillating portion A micro-oscillation element facilitates adjusting the natural frequency relevant to the oscillating motion of the oscillating portion. The micro-oscillation element includes, for example, an oscillating portion, a frame, and a link portion that connects the oscillat... | 01/10/2012 |
| 8089185 | Actuator having a rotation prevention link plate An actuator having an output axis which is moved linearly by a rotatory force, and a boss for holding the above-mentioned output axis in such a way that the output axis can move linearly includes a connecting member for propagating the linear motion of the above-men... | 01/03/2012 |
| 8089184 | Fan and motor having multiple insulators with an axially protruding conductor pin In a motor, axially upper and lower end surfaces of the stator core are substantially covered by a first insulator and a second insulator, both of which are made of resin. A boss is arranged circumferentially between two neighboring teeth. Three bosses are arranged ... | 01/03/2012 |
| 8084907 | Spindle motor having holding magnet preventing oil discharge The spindle motor includes a rotating shaft, a rotor cover which is secured to the rotating shaft and rotates the rotating shaft, a bearing for rotatably supporting the rotating shaft, a holder for holding the bearing, and a holding magnet which is directly mounted ... | 12/27/2011 |
| RE42990 | Alternator pulley An alternator pulley includes a driving member driven and rotated via a belt from an output shaft of an engine. A driving member is disposed on an inner surface of the driving member and a one-way clutch is interposed between the driving and driven member. The one-w... | 12/06/2011 |
| 8049394 | Micro oscillating comb tooth element with two interesecting oscillation axes A micro oscillating element includes a frame and an oscillation section connected to the frame via a torsional joining section. The oscillation section includes a movable functional section, an arm section and a first comb-tooth electrode. The arm section extends fr... | 11/01/2011 |
| 8044552 | Actuator driving system in which a drive voltage and number of electrodes parts driven changes in accordance with temperature An actuator of the present invention includes a moving part, and a driving electrode which is comprised of electrode parts electrically isolated from each other and drives the moving part. A drive voltage is applied selectively to some of the electrode parts to cont... | 10/25/2011 |
| 8040001 | Assemblies for electrical machines The present invention provides an assembly for mounting to, or forming part of, the stator assembly of a rotating electrical machine. A plurality of component modules are provided at angularly spaced-apart locations around the assembly and contain power electronics ... | 10/18/2011 |
| 8040000 | Stator cooling structure for superconducting rotating machine Disclosed herein is a structure for cooling the stator of a superconducting rotating machine. The structure includes a stator coil. Slots are axially disposed at the stator coil to support the stator coil, and a space is defined between the slots to allow the stator... | 10/18/2011 |
| 8035274 | Apparatus and method for ferroelectric conversion of heat to electrical energy The present invention relates to a new method and apparatus for converting heat to electric energy. The invention exploits the rapid changes in spontaneous polarization that occur in ferroelectric materials during phase change. The invention permits robust and econo... | 10/11/2011 |
| 8022587 | Electrical machine with nonuniform pole teeth Electric machines which are excited with permanent magnets are to be improved in terms of their smoothness of operation and their loss properties. For this purpose, an electric machine is proposed comprising a first active part (40) on which one electric magn... | 09/20/2011 |
| 8018117 | Closely spaced electrodes with a uniform gap An improved design for maintaining separation between electrodes in tunneling, diode, thermionic, thermophotovoltaic and other devices is disclosed. At least one electrode is made from flexible material. A magnetic field is present to combine with the current flowin... | 09/13/2011 |
| 8018118 | Micro-oscillation element provided with weight portion, and array utilizing the same A micro-oscillation element includes a base frame, an oscillating portion, and a link portion connecting the base frame and the oscillating portion to each other. The oscillating portion has a movable functional portion, a first driving electrode connected to the mo... | 09/13/2011 |
| 7982360 | Apparatus and method for ferroelectric conversion of heat to electrical energy The present invention relates to a new method and apparatus for converting heat to electric energy. The invention exploits the rapid changes in spontaneous polarization that occur in ferroelectric materials during phase change. The invention permits robust and econo... | 07/19/2011 |
| 7518272 | Electric fan with bearing An electric fan includes a fan base (10), a bearing (40) and a rotor assembly (20). The fan base forms a central tube (11) receiving the bearing therein. The rotor assembly includes a fan hub (22), and a pivot axle (23) join... | 04/14/2009 |
| 7518280 | Method and system for selectively operating an electric motor A method for selectively operating an electric motor in one of a first pole configuration and a second pole configuration is provided. The first pole configuration has a first phase winding structure, a second phase winding structure and a third phase winding struct... | 04/14/2009 |
| 7518271 | Electric machine with stator cooling teeth An electrical machine, in particular a rotary current generator for motor vehicles, is proposed which has a housing (13) in which a stator (16) is retained, such that a coolant can flow around the outside of the stator (16) from one of its axial... | 04/14/2009 |
| 7518286 | Vibration wave driven apparatus and vibrator A vibration wave driven apparatus which makes it possible to secure a required component accuracy obtained by machining and can increase a power ratio to the size of the apparatus. A plurality of contact parts are formed on one surface of an elastic vibration plate ... | 04/14/2009 |
| 7501728 | Electric machine with a winding support assembly and a measuring system An electric machine, in particular a motor, includes a winding support assembly and a measuring system, preferably an infrared measuring system, The measuring system has at least one sensor and an evaluation unit, whereby the measuring system is integrated in the wi... | 03/10/2009 |
| 7479717 | Turbomachine having a device for automatically detecting ferromagnetic particles in an oil enclosure A turbomachine having a longitudinal axis, the turbomachine comprising an annular rotor centered on the longitudinal axis of the turbomachine, an annular stator disposed coaxially around the rotor, at least one ball bearing disposed on the rotor and rotatably suppor... | 01/20/2009 |
| 7474028 | Motor A motor includes a stator and a rotor rotated due to the interaction between the rotor and the stator. Since overhangs are protruded only from the circumference of a rotor core of the rotor facing the stator in the axial direction, manufacturing costs for improving ... | 01/06/2009 |
| 7471022 | Magnetic bearing Certain exemplary embodiments comprise a system, which can comprise a radial magnetic bearing static portion. The radial magnetic bearing static portion can comprise a plurality of electromagnets. The radial magnetic bearing static portion can comprise a plurality o... | 12/30/2008 |
| 7463914 | Superconducting acyclic homopolar electromechanical power converter An acyclic homopolar electromechanical power converter that uses superconducting series connected rotor elements for series summation of magnetomotive and electromotive force. The novel rotor assembly comprises a plurality of conductor elements connected in series b... | 12/09/2008 |
| 7462969 | Electromagnetic actuator with external coils An electromagnetic actuator with a smaller size and an increased strength is provided. In the electromagnetic actuator, a first arm portion and a second arm portion that connect the magnetic poles of a stator extend to the outside of a rotor housing. A first coil an... | 12/09/2008 |
| 7459824 | High torque repulsion motor A high torque AC motor of the repulsion type that includes at least four stator poles and an armature with chordally oriented windings. The armature windings are cyclically shorted and opened in groups at appropriate angular positions of the armature by a non-contac... | 12/02/2008 |
| 7459822 | Rotating electric machine having switched or variable reluctance with flux transverse to the axis of rotation An electric machine, such as a switched reluctance motor (SRM), having one or more transverse flux axes is described. The rotor and stator of the electric machine have more than one phase, not necessarily of even number. Flux guidance regions within the stator are a... | 12/02/2008 |
| 7459821 | Permanent magnet assisted synRM and method for imposing magnetic force thereon A PMA (Permanent Magnet Assisted) synRM and a method for imposing a magnetic force thereon. Magnets are inserted into outer flux barriers of a plurality of flux barriers formed along the radius of a rotor, and bridges or slim portions are formed on inner flux barrie... | 12/02/2008 |
| 7459807 | Linear motor geometry for use with persistent current magnets An electrically powered launcher is disclosed that can accelerate small payloads to orbital velocities. The invention uses a novel geometry to overcome limitations of other design, and allows full exploitation of existing superconducting materials. ... | 12/02/2008 |
