Patents Issued in March 2, 2004
-
Patent number: 6700275Abstract: A winding method comprises winding a single conducting wire around a predetermined number of pegs in sequence to thereby form a stator coil assembly having even coils and two ends. The winding direction of each coil is opposite to a coil adjacent thereto. The stator coil assembly having even coils is mounted to a casing of a D.C. motor with the coils located corresponding to a permanent magnet of a rotor. The rotor having the permanent magnet is driven to turn by magnetic forces created as a result of energizing the coils.Type: GrantFiled: September 28, 2001Date of Patent: March 2, 2004Assignee: Sunonwealth Electric Machine Industry Co., Ltd.Inventors: Alex Horng, Ching-Shen Hong, Tso-Kuo Yin
-
Patent number: 6700276Abstract: A rotating electrical machine having cooperating rotor and stator, one of which forms a plurality of pole teeth around which individual coils are wound. The coils are connected in a number depending upon the phase and number of poles and the connected coils of each phase are spaced from each other. Crossover wires connect these coil windings of each phase and the crossover wires are affixed by bonding to outstanding tabs that are formed on the outermost laminations of the assembly. This reduces hand labor and insures that the crossover wires will not interfere with other components of the machine or associated driving or driven structures.Type: GrantFiled: March 27, 2002Date of Patent: March 2, 2004Assignee: Kabushiki Kaisha MoricInventor: Ken Hakamata
-
Patent number: 6700277Abstract: A rotor of a vehicle AC generator is comprised of a rotor core and a field coil. The rotor core is comprised of a boss portion and a plurality of claw-pole portions bending to respectively extend in axial directions from outer circumferences of the boss portion to interleave with each other to form a zigzag space between the claw-pole portions. The field coil comprises a main coil portion disposed on the boss portion, a sub-coil portion disposed between the main coil and the claw-pole portions and a flywheel diode connected in parallel with the main coil. When the field current is cut off, current circulating through the main coil is increased because the energy accumulated in the sub-coil is discharged.Type: GrantFiled: April 16, 2002Date of Patent: March 2, 2004Assignee: Denso CorporationInventors: Shin Kusase, Tsutomu Shiga
-
Patent number: 6700278Abstract: The invention relates to a disk motor with an armature disk, which is rotatably mounted and provided with permanent magnets, and with a stator which comprises a stator plate which is equipped with coils. The aim of the invention is to provide a disk motor that is as flat as possible and that is characterized by an improved smoothness of running. To this end, an annular soft-magnetic prestressing device is arranged concentrically on the stator plate in such a manner that at least one section of the prestressing device is located below the coil window of the coils in the axial direction. The armature disk may support an annular flux-return element opposite which the annular prestressing device is located in the radial direction. Said prestressing device has a cross-sectional contour that guides the magnetic lines of electric flux from the annular flux-return element to the coil window.Type: GrantFiled: October 5, 2001Date of Patent: March 2, 2004Assignee: Institute fur Mikrotechnik Mainz GmbHInventors: Wolfgang Ehrfeld, Hans-Dieter Stölting, Frank Michel, Matthias Nienhaus, Stephan Kleen
-
Patent number: 6700279Abstract: The present invention has a stator 3 around which an armature coil 11 is wound, a rotor 5 rotatably arranged inside or outside the stator 3, ring magnets 24 and a sensor unit 25 for detecting positions of the rotor, a motor driver 31 for controlling current flowing into the armature coil 11 such that a rotating magnetic field is formed in accordance with rotating positions of the rotator. The rotator 5 has a field magnet on including a plurality of permanent magnets 9 magnetized at the same pole, and a plurality of control poles 10 made of a magnetic material and arranged between the permanent magnets 9. Further, a field coil 13 forming a closed magnetic path passing through the control poles 10 is provided in a side of the stator 3. By controlling directions and amounts of current flowing into the field coil 13, motor characteristics are controlled without reducing motor efficiency thereof.Type: GrantFiled: March 25, 2002Date of Patent: March 2, 2004Assignee: Mitsuba CorporationInventors: Hidekazu Uchiyama, Yutaka Nozue
-
Patent number: 6700280Abstract: A drive unit with a drive and an electric machine, the drive being equipped with a drive shaft and the electric machine with a stator and a rotor. The rotor is coaxial to the stator and connected to the drive shaft for the transmission of torque, where the stator and the rotor interact with each other across an air gap, and where the drive shaft causes the rotor to execute a wobbling motion. In a cross section parallel to the drive shaft, the geometric course of at least one of the two surfaces forming the boundaries of the air gap, i.e., the surface of the rotor or the surface of the stator, is designed so that it at least approximates the geometric slowing curve (VR) described by the wobbling motion of the rotor.Type: GrantFiled: November 5, 2001Date of Patent: March 2, 2004Assignee: Mannesmann Sachs AGInventors: Martin Geiger, Bernhard Schierling
-
Patent number: 6700281Abstract: A DC motor includes an armature winding that includes a first coil group of a plurality of phase coils and a second coil group of a plurality of phase coils, a commutator, a brush unit that includes two pairs of brushes and a motor current supply device. The first and second coil groups are connected in series to a DC power source via the commutator and the two pairs of brushes to be supplied with motor current by the motor current control device. Therefore, voltage applied across the brushes and the commutator is reduced, and arc discharge is suppressed.Type: GrantFiled: March 19, 2002Date of Patent: March 2, 2004Assignee: Denso CorporationInventors: Kiyonori Moroto, Motoya Ito
-
Patent number: 6700282Abstract: A rotary electric machine having improved coil connection reliability, simplified coil end processing steps and improved workability based on an improved components mounting method is to be provided. Flat type conductors are inserted in a stacked state into each of slots formed in a stator core, and a side face of a preceding-stage winding terminal end and a side face of a succeeding-stage winding start end in the flat type conductors are lapped and connected to constitute an assembly of stator coils. The stator coil assembly comprises plural coil groups, and one electrode is connected to one conductor end in the coil groups, while another electrode is moved in a successive manner to connect preceding- and succeeding-stage winding terminal and start ends of the conductors. Further, an insulating ring with crossover conductors laid thereon is combined with such stator coil assembly to connect winding terminal and start ends of the stator coil assembly, thereby constituting a predetermined winding circuit.Type: GrantFiled: October 30, 2002Date of Patent: March 2, 2004Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yoshimi Mori, Takashi Yasuhara, Osamu Koizumi, Masaaki Hayashi, Shinji Kikawa
-
Patent number: 6700283Abstract: This invention provides a rotating electric machine using an inner section of a slot of a stator as a cooling passage and allowing a high cooling efficiency. Furthermore, it provides a manufacture method for the rotating electric machine which allows streamlining of the manufacture of the cooling passage. A plate is attached to the plate retaining groove formed in proximity to the opening of the slot of the stator. A resin layer is formed by injection of resin into a space formed between the outer face of the plate and the mold set on an inner peripheral face of the stator. The plate is pressed by the injection pressure of the resin to come into close contact with the stopper and to create a seal which prevents leakage of resin into the slot. A leg is provided on the plate and extends into the slot for reducing the cross sectional surface area of the cooling passage.Type: GrantFiled: November 7, 2001Date of Patent: March 2, 2004Assignee: Nissan Motor Co., Ltd.Inventors: Toshio Kikuchi, Shinichiro Kitada, Yutaro Kaneko, Takashi Tsuneyoshi
-
Patent number: 6700284Abstract: A fan assembly includes a fan housing and a fan. A switched reluctance fan motor is mounted in an inlet of the fan housing and includes a shaft that is connected to the fan. The switched reluctance fan motor includes a stator with a plurality of circumferentially-spaced stator segment assemblies that include a stator segment core. Winding wire is wound around the stator segment core. A rotor tends to rotate relative to the stator to a rotational position that maximizes the inductance of an energized winding. A drive circuit energizes the winding wire around the stator segment assemblies based on the rotational position of the rotor. End cap assemblies are connected to opposite axial ends of the stator segment core. The end cap assemblies define an annular channel for receiving the winding wire and for preventing winding creep.Type: GrantFiled: March 26, 2001Date of Patent: March 2, 2004Assignee: Emerson Electric Co.Inventors: Donald J. Williams, Steven P. Randall, Craig E. Wallace
-
Patent number: 6700285Abstract: For an electrical rotating machine, it is suggested for the non-rotatable connection of a bundle of laminations with a rotor or a stator that the respective bundle of laminations have a profiled contact surface for an assigned rotor hub or an assigned stator housing, in which case, by an electromagnetic forming of the rotor hub or of the stator housing, which is effective at least in areas, its form-locking contact on the profiled contact surface of the respective bundle of laminations is achieved by plasticType: GrantFiled: August 21, 2000Date of Patent: March 2, 2004Assignee: Bayerische Motoren Werke AGInventors: Clemens Luchner, Bernhard Krasser
-
Patent number: 6700286Abstract: A stator structure of reciprocating motor is provided. The stator structure includes a cylindrical stacked core having a plurality of lamination sheets each having a hanging groove, and an elastic ring elastically inserted into and fixed to the hanging groove. The lamination sheets are arranged extending radially and axially with respect to a longitudinal centerline of the cylindrical stacked core. Accordingly, the cylindrical stacked core is firm and the fastening strength between the cylindrical stacked core and an outer core is improved. Therefore, the reliability of the stator structure is improved. Also, it is possible to reduce manufacturing costs and to improve assembly productivity.Type: GrantFiled: November 13, 2001Date of Patent: March 2, 2004Assignee: LG Electronics Inc.Inventor: Kyeong Bae Park
-
Patent number: 6700287Abstract: Core sheets are progressively displaced one after the other by a predetermined displacement angle in a circumferential direction of a core in such a manner that stays of the core sheets form a plurality of stairstep-shaped guide walls. Each core sheet includes projections, recesses and a through hole, which are all arranged along a concentric circle that is concentric to a rotational axis of a rotatable shaft of a motor. The projections are arranged in a first axial end surface of the core sheet, and the recesses and the through hole are arranged in a second axial end surface of the core sheet in such a manner that each projection of the core sheet is opposed to a corresponding one of the recesses of the core sheet in the axial direction of the core.Type: GrantFiled: December 19, 2001Date of Patent: March 2, 2004Assignee: Asmo Co., Ltd.Inventors: Jun Ohmura, Ichirou Arai
-
Patent number: 6700288Abstract: An electromagnetic machine is provided. The machine includes a stator extending along a longitudinal axis and having an inner surface defining a rotor receipt cavity. The rotor extends along and is rotatable about the longitudinal axis within the rotor receipt cavity. A plurality of ring assemblies are supported on the rotor and a plurality of magnets are circumferentially spaced about the rotor and extend through the ring assembly. Each magnet is generally parallel to the axis of the rotor.Type: GrantFiled: August 15, 2001Date of Patent: March 2, 2004Assignee: DRS Power & Control Technologies, Inc.Inventor: James S. Smith
-
Patent number: 6700289Abstract: A DC commutator motor that is driven by a direct current power source obtained by rectifying an alternating current power source includes a plus-side brush made of material having a high resistivity and a minus-side brush made of material having a low resistivity. A capacitor is inserted in and connected parallel to the direct current power source. The commutator motor makes use of specials tubes having different shapes to avoid an incorrect insertion of one of the specials tubes into the insertion hole designed to receive the other of the specials tubes.Type: GrantFiled: August 28, 2002Date of Patent: March 2, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tsuyoshi Konishi, Shiro Tateishi, Hiroshi Nishimura
-
Patent number: 6700290Abstract: An electric motor with brush assembly supporting two separately formed brushes. A fractional horsepower direct current motor has a brush assembly supporting two separately formed brushes and side by side and connected electrically in parallel. This reduces the effective current density required for each brush without increasing the size of the brushes required and affecting the dynamic behavior.Type: GrantFiled: May 17, 1991Date of Patent: March 2, 2004Assignee: Johnson Electric S.A.Inventor: Roger Frederick Baines
-
Patent number: 6700291Abstract: Brush holding device includes a brush, a brush holder, a torsion spring and a support pin. The torsion spring applies side pressure to the brush by spring force exerted around the support pin and also temporarily hold the brush in the brush holder. When the temporarily held state of the brush holder is relieved, the spring force of the torsion spring urges the brush toward a commutator.Type: GrantFiled: December 13, 2002Date of Patent: March 2, 2004Assignee: Asmo Co., Ltd.Inventors: Yasuaki Uchida, Masashi Nakata
-
Patent number: 6700292Abstract: A metal-graphite brush has a copper-graphite brush body to which a metal sulfide solid lubricant is added and a lead embedded. Indium is at least added to an interface between the brush body and the lead in a concentration of 0.4-8 wt %.Type: GrantFiled: October 24, 2002Date of Patent: March 2, 2004Assignees: Tris Inc., Denso CorporationInventors: Takayoshi Otani, Mitsuo Ikeda, Yoichi Sakaura, Takahiro Sakamoto, Youichi Murakami, Kyoji Inukai, Yasuyuki Wakahara, Masami Niimi
-
Patent number: 6700293Abstract: A stator structure for a brushless dc motor in accordance with the present invention mainly comprises a singular magnetic-conductive plate, a coil, and a driver member. The singular magnetic-conductive plate includes a main pole plate, an axial hole, and a plurality of pole faces. The main pole plate is adapted to be a base combined with the coil and the drive member, and defined the axial hole on its center. The edge of the axial hole is projected to form an axial tube. The pole faces are spaced apart equidistant round the axial hole and adjacent to the coil. The singular magnetic-conductive plate further includes at least one assembling hole.Type: GrantFiled: September 9, 2002Date of Patent: March 2, 2004Assignee: Sunonwealth Electric Machine Industry Co., Ltd.Inventors: Alex Horng, Yin-Rong Hong, Ching-Sheng Hong
-
Patent number: 6700294Abstract: A stator includes a bobbin, plural pole plates, and an axle tube. Half of the plural pole plates are mounted on top of the bobbin and the other half of the plural pole plates are mounted to a bottom of the bobbin. The axle tube is extended through the pole plates and the bobbin to form a stator having four or eight poles. Each of the pole plates has a single pole end and single pole face extending from the pole end.Type: GrantFiled: December 20, 2001Date of Patent: March 2, 2004Assignee: Sunonwealth Electric Machine Industry Co., Ltd.Inventors: Alex Horng, Ching-Shen Hong
-
Patent number: 6700295Abstract: A rotor core includes a plurality of first core sheets and a plurality of second core sheets. The first core sheets and the second core sheets are laminated in the axial direction of the rotor core. Each first core sheet includes a plurality of first teeth laid out in a ring form on a same plane. Each second core sheet includes a plurality of second teeth laid out in a ring form on a same plane. Each first tooth is placed over the associated second tooth in the axial direction of the rotor core. Each tooth has a winding portion extending in the radial direction of the rotor core and an arm portion integrally provided at an outer end of the winding portion in the radial direction of the rotor core and extending in the peripheral direction of the rotor core. Each arm portion has a coupling portion at one end. Each first tooth is coupled to that one of the second teeth which is stacked on another first tooth adjoining in the peripheral direction of the rotor core by coupling of their coupling portions.Type: GrantFiled: December 11, 2002Date of Patent: March 2, 2004Assignee: ASMO Co., Ltd.Inventors: Kazunobu Kanno, Shinsuke Muroi
-
Patent number: 6700296Abstract: An object of the present invention is to provide an automotive alternator achieving high output by overlapping a laminated core of a stator and yoke portion of a field rotor in an axial direction, and enabling electromagnetic noise to be reduced by prescribing dimensional relationships in the field rotor. In this automotive alternator, a ratio (R2/R1) between an outer radius R2 of a cylindrical portion of a Lundell-type core and an outer radius R1 of the Lundell-type core is set to a range from 0.50 to 0.54, and a ratio (Tr/Tp) between an axial overlap length Tr between the laminated core of the stator and the yoke portions of the Lundell-type core and an axial length Tp of the yoke portions is set to a range greater than or equal to 0.2.Type: GrantFiled: May 24, 2002Date of Patent: March 2, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Atsushi Oohashi, Yoshihito Asao, Katsumi Adachi
-
Patent number: 6700297Abstract: A superconducting PM machine has a stator, a rotor and a stationary excitation source without the need of a ferromagnetic frame which is cryogenically cooled for operation in the superconducting state. PM material is placed between poles on the rotor to prevent leakage or diffusion of secondary flux before reaching the main air gap, or to divert PM flux where it is desired to weaken flux in the main air gap. The PM material provides hop-along capability for the machine in the event of a fault condition.Type: GrantFiled: January 9, 2003Date of Patent: March 2, 2004Assignee: UT-Battelle, LLCInventors: John S. Hsu, S. William Schwenterly
-
Patent number: 6700298Abstract: A power source converts &agr;-particle energy to electricity for use in electrical systems. Liquid gallium or other liquid medium is subjected to &agr;-particle emissions. Electrons are freed by collision from neutral gallium atoms to provide gallium ions. The electrons migrate to a cathode while the gallium ions migrate to an anode. A current and/or voltage difference then arises between the cathode and anode because of the work function difference of the cathode and anode. Gallium atoms are regenerated by the receiving of electrons from the anode enabling the generation of additional electrons from additional &agr;-particle collisions.Type: GrantFiled: June 27, 2002Date of Patent: March 2, 2004Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: G. Jeffrey Snyder, Jagdishbhai Patel, Jean-Pierre Fleurial
-
Patent number: 6700299Abstract: The present invention relates to an assembly of variable capacitance as well as to a method of operating the assembly. In the assembly, a variable capacitor is formed by a variable coverage or a variable distance of at least one first (4) and one second electrically conductive region (5). The first electrically conductive region (4) is configured on or in a substrate (1) and said second electrically conductive region (5) is configured on or in an actuator element (3) of a first micro-mechanical actuator (2). The actuator (2) is disposed on the substrate (1) in such a way that it can perform a movement of the actuator element (3) with the second region (5) along a surface of the substrate (1) at different positions relative to the first region (4), at which positions the second region (5) overlaps the first region (4) at least partly.Type: GrantFiled: March 31, 2003Date of Patent: March 2, 2004Assignee: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Hans-Joachim Quenzer, Bernd Wagner, Beatrice Wenk
-
Patent number: 6700300Abstract: A compact and wide band surface acoustic wave device for intermediate-frequency is disclosed. A piezoelectric substrate for use in a surface acoustic wave device having high electromechanical coupling factor and low SAW velocity is also disclosed. The surface acoustic wave device is constituted of a piezoelectric substrate 1 and inter-digital electrodes 2, 2 formed on the piezoelectric substrate 1. The piezoelectric substrate 1 has a crystal structure of Ca3Ga2Ge4O14 and is represented by the chemical formula, Ca3TaGa3Si2O14. A cut angle of the piezoelectric substrate 1 cut out of the single crystal and a direction of propagation of surface acoustic waves on the piezoelectric substrate represented in terms of Euler's angles (&phgr;, &thgr;, &psgr;) are found in an area represented by −2.5°≦&phgr;≦2.5°, 30°≦&thgr;≦90°, and −65°≦&psgr;≦65°.Type: GrantFiled: October 2, 2001Date of Patent: March 2, 2004Assignee: TDK CorporationInventors: Kenji Inoue, Katsuo Sato, Hiroki Morikoshi, Katsumi Kawasaki, Jun Sato
-
Patent number: 6700301Abstract: A method and a device are described for detecting a fault current across a piezoelectric actuator (5) of an injector or its high voltage supply lead (6, 6a). Because the fault current upon contact with a person, for example, is relatively small compared to the useful current that charges or discharges the actuator, direct measurement of the current is not reliable. Therefore, it is suggested that, during the injection or in an injection pause, when the piezoelectric actuator (5) is charged, the voltage variation or a change in voltage (dU) be measured and the difference be compared to a predefined threshold value (S). When the threshold value (S) is exceeded, a fault message is produced, the voltage source is shut off, and/or the piezoelectric actuator (5) is discharged. The measured fault can be weighted using a counting algorithm. The method thus provides maximum protection upon contact, in particular for service personnel.Type: GrantFiled: July 9, 2001Date of Patent: March 2, 2004Assignee: Robert Bosch GmbHInventors: Johannes-Jörg Rueger, Matthias Mrosik, Marco Gangi, Udo Schulz
-
Patent number: 6700302Abstract: A piezoelectric resonator includes an internal electrode sandwiched between two layers of ceramic piezoelectric substrates each having a substantially square shape. Surface electrodes are arranged on the front surface and the back surface of the piezoelectric substrate. Both of the piezoelectric substrates are polarization-treated in the substantially perpendicular direction relative to the main surfaces and in the opposite directions with respect to the sandwiched internal electrode. When a signal voltage is applied across the surface electrodes, the piezoelectric resonator is bending-deformed so as to become convex on one side of the main surfaces and become concave on the other side thereof.Type: GrantFiled: July 22, 2000Date of Patent: March 2, 2004Assignee: Murata Manufacturing Co., Ltd.Inventors: Takashi Yamamoto, Yuko Yokoi
-
Patent number: 6700303Abstract: A piezoelectric element includes a plurality of piezoelectric layers composed of a piezoelectric material containing Sr, Bi, Ti, and O, at least three vibration electrodes opposing each other, each disposed among the piezoelectric layers, and an energy-confining region formed in a region in which the vibration electrodes overlap, the energy-confining region being parallel to the planes of the vibration electrodes and exciting an n-th order longitudinal thickness vibration. The maximum length L of a secant between two intersections on the periphery of the energy-confining region and the distance t between the topmost vibration electrode and the bottommost vibration electrode satisfy the relationship nL/t of less than 10. The piezoelectric element is thermally stable and has a narrow allowable error.Type: GrantFiled: December 18, 2002Date of Patent: March 2, 2004Assignee: Murata Manufacturing Co. LtdInventors: Akira Ando, Masahiko Kimura, Takuya Sawada
-
Patent number: 6700304Abstract: The active/passive absorber for extended vibration and sound radiation control includes principally two layers. The first layer has a low stiffness per unit area which allows motion in the direction perpendicular to its main plane. The second layer is principally a mass layer. These two combined layers have a frequency of resonance close to one of the main structure. The dynamic behavior of the coupled system makes the active/passive absorber a passive absorbe; however, the first layer can be electrically actuated to induce motion in the direction perpendicular to its main plane. This addition property induces and/or changes the motion of the mass layer and therefore improves the dynamic properties of the active/passive absorber system.Type: GrantFiled: April 20, 1999Date of Patent: March 2, 2004Assignee: Virginia Tech Intellectual Properties, Inc.Inventors: Christopher R. Fuller, Pierre E. Cambou
-
Patent number: 6700305Abstract: The present invention is an actuator using a piezoelectric element as a displacement element, wherein a drive signal voltage and current are reduced, and power consumption is reduced, while output is increased. A structure comprising two displacement units of laminate-type piezoelectric elements 10 and 10′ and elastic elements 25 and 25′ resonated by the piezoelectric elements are arranged so as to mutually intersect, and a tip 20 provided at the intersection point of the elastic members 25 and 25′ describes a circular path or elliptical path, and moves a rotor 40. The oscillation of the piezoelectric elements 10 and 10′ is suppressed by the elastic members 25 and 25′, so as to set the phase of the electromotive force produced by the voltage effect of the piezoelectric elements 10 and 10′ themselves to the opposite of the phase of the drive signal, thereby reducing current consumption.Type: GrantFiled: December 15, 2000Date of Patent: March 2, 2004Assignee: Minolta Co., Ltd.Inventors: Shinya Matsuda, Takashi Matsuo
-
Patent number: 6700306Abstract: A laminated piezo-electric device comprising a pole-like laminate formed by alternately laminating piezo-electric layers and electrode layers in the direction of height, and a pair of outer electrode plates formed on the different side surfaces of said pole-like laminate, said two electrode layers neighboring each other with said the piezo-electric layer sandwiched therebetween being electrically connected at their side surfaces to the outer electrode plates which are different from each other, wherein flexible protruded electrically conducting terminals are provided on the side surfaces of said pole-like laminate on where the outer electrodes are arranged, said flexible protruded electrically conducting terminals extending along the side surfaces of the electrode layers and are capable of following the stretching and contraction of said pole-like laminate in the direction of height thereof, and the electrode layers being joined to said outer electrode plates via said protruded electrically conducting terminaType: GrantFiled: February 25, 2002Date of Patent: March 2, 2004Assignee: Kyocera CorporationInventors: Shigenobu Nakamura, Koki Ashida
-
Patent number: 6700307Abstract: Common internal electrodes and segment internal electrodes are laminated alternately with a piezoelectric material between and a common external electrode and a segment external electrode are provided on the surface, forming a drive vibrator. A free end part of the drive vibrator is formed with an active region and can be expanded and contracted in the length direction of the vibrator. A piezoelectric material of the outermost layer in the free end part can be operated based on the potential difference between the external and internal electrodes and a portion of the active region in the external electrode is used as a trimming portion with an effective length varied by trimming.Type: GrantFiled: June 17, 2002Date of Patent: March 2, 2004Assignee: Seiko Epson CorporationInventor: Tsuyoshi Kitahara
-
Patent number: 6700308Abstract: The invention relates to a piezoelectric actuator, in particular for actuating control valves or injection valves in motor vehicles, having an actuator body in the form of a multilayered laminate made up of stacked layers of piezoelectric material with intervening metallic or electrically conductive layers that function as electrodes, and the end faces of this actuator body are respectively contacted by a top plate oriented toward the valve having an axially protruding valve tappet and a bottom plate at the opposite end, wherein the actuator rests in an axial bore of a valve housing and is prestressed at the ends in the axial direction between the top plate and the bottom plate by means of a spring element.Type: GrantFiled: June 21, 2002Date of Patent: March 2, 2004Assignee: Robert Bosch GmbHInventor: Rudolf Heinz
-
Patent number: 6700309Abstract: A miniature electrical relay including a piezoelectric actuating element where the piezoelectric actuating element includes a piezoelectric thin-film material sandwiched in between two metal electrode layers that function as piezoelectric electrodes. The metal electrode layers are connected to a positive and negative terminal, respectively, of a power source, which results in actuation of the piezoelectric actuating element. The piezoelectric actuating element is affixed to a deformable metal contact through an insulating layer, such that when actuated, the piezoelectric actuating element selectively deforms the deformable metal contact to cause the contact to move into or out of electrical and mechanical connection with a fixed metal contact.Type: GrantFiled: January 16, 2002Date of Patent: March 2, 2004Assignee: MCNCInventors: David E. Dausch, Gary E. McGuire
-
Patent number: 6700310Abstract: A wireless switch is provided having a twenty-year life energy harvesting arrangement for self-powering a wireless transmitter. The energy harvesting arrangement is implemented in one embodiment using a piezoelectric switch element. A tritium light source and photovoltaic device are used in a second embodiment, while a black light source and photovoltaic device are used in a third embodiment. The energy harvesting wireless switch arrangement of the present invention can be combined, for example, with a vehicle side mirror switch, to reduce the complexity of the wire harness feeding the door. The wireless switch can be located without regard to accessability of a wiring harness or connector.Type: GrantFiled: September 7, 2001Date of Patent: March 2, 2004Assignees: Lear Corporation, Massachusetts Institute of TechnologyInventors: H. Winston Maue, Richard Meinzer, Joe Paradiso, Mark Feldmeier
-
Patent number: 6700311Abstract: A piezoelectric ceramic body includes a multiplicity of insulating layers, arranged one on top of the other, made of a piezoactive ceramic material, the insulating layers being separated from each other at least in areas by internal electrodes, of which at least one has a silver-containing material at least in areas. The material of the silver-containing internal electrode furthermore has a component reducing or inhibiting the diffusion of silver from the internal electrodes into an insulating layer, in particular a ceramic component on the basis of a PZT ceramic.Type: GrantFiled: February 12, 2001Date of Patent: March 2, 2004Assignee: Robert Bosch GmbHInventors: Marianne Hammer, Friederike Lindner, Petra Kuschel
-
Patent number: 6700312Abstract: A quartz oscillator device of the present invention comprises a quartz oscillating plate having two major surfaces, each of which is formed with an excitation electrode and lead electrodes drawn out of the excitation electrode, and electrode pads formed on a base, wherein the quartz oscillating plate and the electrode pads are electrically connected via a silicone-based conductive adhesive. Among the excitation electrode and the lead electrodes, at least each of the lead electrodes comprises a Cr film layer, a Au film layer, and a thin Cr film layer or a thin Ag film layer, which are laminated on the quartz oscillating plate in this order. In addition, each electrode pad comprises a metallized layer made of tungsten or molybdenum, a Ni film layer and a Au film layer, which are laminated on the base in this order; and Ni in the Ni film layer is diffused at least into a predetermined area of the Au film layer in each electrode pad where the silicone-based conductive adhesive is applied.Type: GrantFiled: October 26, 2001Date of Patent: March 2, 2004Assignee: Daishinku CorporationInventors: Minoru Iizuka, Hiroyuki Ishihara, Yoshikiyo Ogasawara, Akihiro Mori, Susumu Hirao, Tatsuya Murakami
-
Patent number: 6700313Abstract: The resonator according to the invention, which is intended to be mounted in a case, includes a tuning fork shaped part (42) with two parallel arms (44, 46) connected to each other by a base (48) and carrying electrodes (52, 54) to make them vibrate, these electrodes being connected to connection pads (60, 62) intended to be electrically connected to the exterior of the case. In accordance with the invention, the resonator (40) also includes a central arm (50) attached to the base (48) and located between the arms (44, 46) of the tuning fork shaped part (42), substantially equidistant from them, this central arm (50) having a greater mass than that of the arms of the tuning fork shaped part and the connection pads (60, 62) are carried by this central arm. This resonator (40) is mounted in a case of parallelepiped shape by fixing its central arm (50) to at least one support secured to the bottom of the case.Type: GrantFiled: September 30, 2002Date of Patent: March 2, 2004Assignee: Eta Sa Fabriques D'EbauchesInventors: Silvio Dalla Piazza, Thomas Lüthi, Bruno Studer
-
Patent number: 6700314Abstract: Various piezoelectric transducers are provided. In one form, a polymer film or thin ceramic piezoelectric transducer is formed of various piezoelectric (active) and dielectric (inactive) layers in which the piezoelectric effect may be attenuated locally at any given point on the surface of the transducer, by use of printed circuit patterns, preferably made by photolithography. This provides a practical realization of a distributed piezoelectric transducer with a bi-dimensional polarization profile that varies smoothly over the surface of the piezoelectric structure. Flexibility of the fabrication procedure provides a way to optimize the design of a distributed piezoelectric transducer for applications such as active vibration control. In another form, a segmented piezoelectric transducer includes a set of active elements such as piezofilms, electronics and flexible printed circuits and connected with external electronic circuitry.Type: GrantFiled: March 28, 2003Date of Patent: March 2, 2004Assignee: Purdue Research FoundationInventors: Daniel Cuhat, Patricia Davies
-
Patent number: 6700315Abstract: A plasma display device including a plasma display panel, a chassis base proceeding substantially parallel to the plasma display panel, and a heat conductive medium closely adhered to the plasma display panel and the chassis base while being disposed between the plasma display panel and the chassis base. The side of the heat conductive medium facing the plasma display panel and/or chassis base is provided with a plurality of prominent portions. Depressed portions are disposed between the prominent portions to remove the gap between the heat conductive medium and the respective plasma display panel and/or chassis base. Contact area enlargement members are formed at the prominent portions to improve the attachment efficiency of the heat conductive medium to the respective plasma display panel and/or chassis base.Type: GrantFiled: July 31, 2002Date of Patent: March 2, 2004Assignee: Samsung SDI Co., Ltd.Inventors: Ki-Jung Kim, Guy-Sung Kim, Ki-Yun Joung
-
Patent number: 6700316Abstract: A projector type lamp can include a projection lens formed by combining together projection lens elements obtained by processing a plurality of projection lenses that can be substantially identical in optical axis center Z, focal length, and focal point, yet different in outer diameter. The projection lens can appear substantially rectangular when viewed in an optical axis direction. Boundary portions between the plurality of processed projection lens elements can be composed of a line connecting points of intersection between a contour line of the projection lens and a line defining a part of each unprocessed projection lens element at which thickness is substantially zero. The lens surfaces of the processed projection lens elements can be continuous with one another through stepped portions that are parallel to the optical axis of the projection lens.Type: GrantFiled: March 22, 2002Date of Patent: March 2, 2004Assignee: Stanley Electric Co., Ltd.Inventors: Hitoshi Taniuchi, Teruo Koike
-
Patent number: 6700317Abstract: An iridium alloy firing tip, fixed to a center electrode, comprises a stem and a head. The firing tip head is integrally formed from one end of the stem. A distal end of the stem is opposed to an opponent electrode. The head is embedded in the opposing portion. The firing tip head is pointed or tapered in a direction opposite to the stem from a maximum diameter portion in such a manner that a cross-sectional area of the head continuously decreases with increasing distance from the maximum diameter portion. The maximum diameter portion is positioned deeply inside the opposing portion, and a base end of the stem extending from the maximum diameter portion is wrapped or surrounded by the opposing portion.Type: GrantFiled: March 28, 2001Date of Patent: March 2, 2004Assignee: Denso CorporationInventors: Keiji Kanao, Kouzou Takamura
-
Patent number: 6700318Abstract: The present invention relates to a color cathode ray tube having a spring structure capable of compensating for the displacement of a shadow mask frame, thereby suppressing the degradation of the color purity according to the mislanding of electron beams. The spring according to the present invention includes a stud pin coupling part, a frame welding part and an inclined part as an elastic support body having a predetermined inclination angle between the stud pin coupling part and the frame welding part. Further, the spring is bonded to a plurality of metal members that have different thermal expansion coefficients, while being separated from each other in a length direction of the spring relative to a tube shaft.Type: GrantFiled: April 11, 2001Date of Patent: March 2, 2004Assignee: LG Electronics Inc.Inventor: Jae-Seung Baek
-
Patent number: 6700319Abstract: A cathode-ray tube having a luminescent screen on a faceplate panel and a tension mask assembly, wherein the assembly comprises a pair of support blades for supporting a tension mask. The tension mask has a pair of mask borders each being fixed to a respective support blade and a plurality of strands extending between the mask borders. The mask further comprises cross wires extending generally perpendicular to the strands on a screen facing side and at least one shield assembly extending between and attached to the mask borders. The shield assembly has a sheath extending along one side of the mask in contact with at least one strand and a shield attached to the cross wires of the mask in overlapping relation to the sheath.Type: GrantFiled: November 29, 2001Date of Patent: March 2, 2004Assignee: Thomson Licensing S. A.Inventors: Joey John Michalchuk, Richard William Nosker
-
Patent number: 6700320Abstract: A cathode ray tube includes a panel having a front screen portion on which a phosphor screen is formed and a panel flange formed on an edge of the front screen portion; a funnel connected to the panel flange; a deflection yoke disposed around the funnel; a neck connected to the funnel, an electron gun disposed in the neck; a color selection apparatus for selecting electron beams emitted from the electron gun and allowing the selected electron beams to land on corresponding phosphors, the color selection apparatus including a frame having a pair of supporting members disposed at a predetermined distance from each other in parallel and a pair of elastic members fixed on both ends of the supporting members to correspond to the lateral sides of the mask; and a shield apparatus for shielding geomagnetism, the shield apparatus being mounted on a circumference of the frame of the color selection apparatus and extended toward the neck.Type: GrantFiled: May 6, 2002Date of Patent: March 2, 2004Assignee: Samsung SDI Co., Ltd.Inventors: Eung-Suk Lee, Jong-Heon Kim
-
Patent number: 6700321Abstract: The image forming apparatus comprises an electron source having a substrate on which a plurality of electron emitting devices are arranged, a face plate provided with fluorescent substances for emitting light of different colors and serving to form a color image upon irradiation of electrons by the electron emitting devices. Rectangular spacers are arrange between the substrate and the face plate and are fixed to the face plate and contacted to the substrate via soft members.Type: GrantFiled: October 4, 2002Date of Patent: March 2, 2004Assignee: Canon Kabushiki KaishaInventors: Hideaki Mitsutake, Hiroshi Takagi, Yoichi Ohsato, Noriaki Ohguri, Masahiro Fushimi, Kazuo Kuroda, Yoshimasa Okamura
-
Patent number: 6700322Abstract: A light source comprises an organic light emitting device which emits radiation having a first spectrum and a phosphor layer which absorbs a portion of the light emitted by the organic light emitting layer and which emits light having a second spectrum. The phosphor layer typically absorbs less than all of the light emitted by the organic light emitting layer and typically covers the entire organic light emitting device. The light emitted by the organic light emitting layer is mixed with the light emitted by the phosphor layer to produce light having a third spectrum. Exemplary embodiments of the invention provide advantages over known devices. For example, because a phosphor layer is provided, the light emitted from the organic light emitting device is scattered, which provides improved uniformity in light output over the area of the light source. Also, because most phosphors are relatively stable over time, the light source has good color stability over time.Type: GrantFiled: June 12, 2000Date of Patent: March 2, 2004Assignee: General Electric CompanyInventors: Anil Raj Duggal, Alok Mani Srivastava
-
Patent number: 6700323Abstract: A plasma display panel comprises a plurality of row electrode pairs (X, Y) provided on a front glass substrate 10, a plurality of column electrodes D provided on a back glass substrate 13 and each intersecting the row electrode pairs, and discharge cells C which are defined in a discharge space S to correspond to the respective intersections. The row electrode Y of each row electrode pair (X, Y) has transparent electrodes Ya each constructed by a leading member Ya1 and a base member Ya2. The column electrode D is provided with enlargement members Da, having a width in a row direction larger than that of the base member Ya2, in a position opposite to the leading member Ya1.Type: GrantFiled: May 17, 2002Date of Patent: March 2, 2004Assignees: Pioneer Corporation, Pioneer Display Products CorporationInventor: Kimio Amemiya
-
Patent number: 6700324Abstract: The invention relates to a plasma picture screen with a improved white color point. The front plate (1) of the plasma picture screen has a blue layer on the side facing the plasma discharge. This may be the dielectric layer (4), the protective layer (5), or an additional layer.Type: GrantFiled: May 6, 2002Date of Patent: March 2, 2004Assignee: Koninklijke Philips Electronics N.V.Inventors: Hans-Helmut Bechtel, Wolfgang Busselt, Joachim Opitz, Harald Glaeser, Thomas Juestel, Volker Van Elsbergen