Patents Examined by Karl Eizo Tamai
  • Patent number: 7239061
    Abstract: Both the stator core and the rotor core of a switching pattern AC induction motor are fabricated by soft magnetic material laminations or ferrite material, etc., both of which have corresponding frequency characteristic. The rotor is a squirrel cage rotor. Switching pattern excitation is adopted in the stator pole, of which the excitation voltage is sine wave pulse width modulated or sine wave pulse amplitude modulated within the frequency range of voice and ultrasonic. Under the condition of the same power output, the present motor reduces its size and mass to a fraction of or tenth of that of an ordinary one. Meanwhile, it reduces the cost of manufacture. It realizes stepless speed regulating from zero to several thousand rpm while keeping well mechanical characteristic performance.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: July 3, 2007
    Inventors: Youguo Huang, Wei Huang
  • Patent number: 7030537
    Abstract: A microstructure for steering light that mitigates stiction problems is provided. A first tiltable assembly that includes a reflective coating is connected with a substrate. A second tiltable assembly is also connected with the substrate. First hand second electrodes are connected with the substrate and are configured to tilt the two tiltable assemblies such that they are interdigitated. In various embodiments, the tiltable assemblies are configured as cantilever arrangements and/or torsion-beam arrangements.
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: April 18, 2006
    Assignee: Network Photonics, Inc.
    Inventors: Bevan Staple, Richard Roth
  • Patent number: 7015605
    Abstract: An electromotive drive is provided, especially for the pump of a power-assisted steering system of a motor vehicle. The drive includes a housing (3) with a bearing journal (15) in which the shaft (18) of a rotor (9) is rotationally mounted. The drive also includes a stator (7) having drive windings. The bearing journal (15) extends through said stator and supports it. The stator (7) is supported by the bearing journal (15), substantially in the transversal direction only. The stator (7) is coupled with the remaining housing (3) in a rotationally fixed manner, so as to transmit the engine torque. The arrangement dramatically reduces disturbing noises which occur especially when the motor is operated at full load and which are caused by relatively high-frequency torque variations.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: March 21, 2006
    Assignee: TRW Automotive Electronics & Components GmbH & Co. KG
    Inventors: Cornelius Peter, Johann Von Der Heide, Michael Petach
  • Patent number: 6940207
    Abstract: A micromachined moving device which has a fixed electrode base plate 8 and a moving electrode plate 2 supported by a support frame 10 through anchor parts 23 and flexures 21 and held at a predetermined distance from the fixed electrode base plate 8, in which an AC drive voltage from an AC drive circuit 60 is applied across the fixed electrode base plate 8 and the moving electrode plate 2 so to drive by the electrostatic force into contact with the former and hold them in contact.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: September 6, 2005
    Assignee: Japan Aviation Electronics Industry Limited
    Inventor: Yoshichika Kato
  • Patent number: 6900576
    Abstract: An object of the present invention is to provide an electrostatic actuator that can be easily assembled and suitably mass-produced and that can implement requirements of both the steady, smooth and stable operation and the enhanced reliability. The present invention is also directed to a method of activating such an electrostatic actuator, and a camera module used with the same.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: May 31, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiro Koga, Toshikatsu Akiba, Mitsunobu Yoshida, Shunsuke Hattori
  • Patent number: 6744173
    Abstract: A multi-layer vertical comb-drive actuator includes a first comb structure having a plurality of first comb fingers and a second comb structure having a plurality of second comb fingers, wherein the first and second comb fingers are substantially interdigitated. The first and second comb fingers may include two or more stacked conductive layers electrically isolated from each other by an insulating layer or an air gap. Alternatively, either the first or second comb fingers may include only one conductive layer. An application of a voltage between the first and second comb fingers causes the second comb structure to move relative to the first comb structure. The present invention includes a 2D-gimble configuration to rotate a movable element along two axis.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: June 1, 2004
    Assignee: Analog Devices, Inc.
    Inventors: Behrang Behin, Satinderpall Pannu
  • Patent number: 6633097
    Abstract: A stator frame for an electric motor including a substantially cylindrical shaped body section having opposed ends, a cooling passageway extending through at least a portion of the body section, and at least one spacer bar. The cooling passageway includes a cooling conduit having an inlet port and an outlet port in flow communication with the cooling passageway. The spacer bar has a notched side and at least one finger extending therefrom such that the finger mechanically couples the spacer bar to the cooling conduit.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: October 14, 2003
    Assignee: General Electric Company
    Inventors: Robert A. Dunlap, James R. Crowell
  • Patent number: 6204587
    Abstract: A self-starting brushless electric motor having a first motor part (stator) (11) with poles arranged in a row, the poles constituting ferromagnetic poles (13S) or permanent-magnet poles (14A), a second motor part (rotor) (12) with poles arranged in a row, the poles having ferromagnetic poles (16A) or permanent-magnet poles and being arranged opposite the row of poles on the first motor part (11), wherein the motor part with salient ferromagnetic poles or, if both motor parts have salient ferromagnetic poles, at least one of the motor parts has a permanent-magnet pole, and also a magnetizing winding on the first motor part. The system of poles formed by the pole rows is magnetically asymmetrical in the direction in which the motor parts (11, 12) are movable in relation to each other.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: March 20, 2001
    Inventors: Vilmos Török, Walter Wissmach, Roland Schaer
  • Patent number: 6144124
    Abstract: A thinned DC brushless motor (50) has a base plate 52 of magnetic material, a rotatable shaft (58) supported perpendicular to the base plate, an annular hub (68) coaxially fixed on the shaft, a stator (60) fixed on the base plate, and a rotor (70) coaxially fixed on the shaft through the annular hub. The rotor (70) includes an first wall portion (72) extended radially from the shaft above the stator and parallel to the base plate and a second wall portion (74) extended from a peripheral edge of the circular potion towards the base plate to enclose the stator. An annular magnet (78) is fixed on an inner surface of the second wall of the rotor with leaving a small gap from a peripheral edge of the stator. The upper wall has a bent portion (80) extended outward away from the annular magnet in the vicinity of an inner edge of the annular magnet.
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: November 7, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Fujio Nakagawa, Yoshihisa Katoh
  • Patent number: 6133661
    Abstract: The invention relates to a rotating electric machine including a coil of a wire having thereon an insulating coating comprising a polybenzimidazole. This rotating electric machine is stably maintained for a long time in dielectric strength even under a highly radioactive environment, due to the use of the special insulating coating. With this, the rotating electric machine can be driven stably for a long time. The invention further relates to another rotating electric machine including (a) a rotor having a rotating shaft; (b) a bearing for supporting the rotating shaft; and (c) a grease applied to the bearing. This grease contains (1) a polyphenyl ether having at least three aromatic rings in the molecule and (2) a urea. The rotor of this rotating electric machine is stably supported in the bearing for a long time even under a highly radioactive environment, due to the use of the special grease. Thus, this rotating electric machine can also be rotated stably for a long time.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: October 17, 2000
    Assignees: Kabushiki Kaisha Meidensha, Kandenko Co., Ltd., Sumitomo Wiring Systems, Ltd.
    Inventors: Yoshinao Okawa, Yoshihiro Murano, Isao Ito, Kenichi Okada, Kazuo Funabashi, Masanori Miyamoto, Kiyohito Mizuide, Yasuhiko Onishi, Masaaki Hoko, Hirotugu Kinoshita, Fumihiro Itano, Makoto Noda, Takeshi Uesugi, Kiyoshi Nagasawa, Shuzo Tanigaki, Yoshiyuki Ema
  • Patent number: 6100621
    Abstract: A thermionic converter having an emitter, a collector, and a source of cesium vapor is provided wherein the source of cesium vapor is differentially heated so that said source has a hotter end and a cooler end, with cesium vapor evaporating from said hotter end into the space between the emitter and the collector and with cesium vapor condensing at said cooler end. The condensed cesium vapor migrates through a porous element from the cooler end to the hotter end.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: August 8, 2000
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Ned S. Rasor, David R. Riley, Christopher S. Murray, Clint B. Geller
  • Patent number: 6087754
    Abstract: A manual electric machine tool (10), having an electric motor (16), whose commutator (20) can be connected to a voltage source via at least one carbon brush (22) pressed against the commutator (20) by spring means (26), wherein the carbon brush (22) includes a head part (34) and a foot part (35) and has an electric pigtail lead (40) and a turn-off device (38), which at a certain wear of the foot part (35) of the carbon brush (22) automatically disconnects the electrical connection between the voltage source and the commutator (20), gains a longer useful life between service intervals for changing carbon brushes in that the carbon brush (22) is lengthened in the region of its head part (34) by a single axial continuation (36), which serves as a socket for the turn-off device (38) and is dimensioned such that the spring (26) enter flush and integrally into the outer contour of the carbon brush (22) between the outermost outer edges of the head part (34) and of the continuation (36), inside these outer edges.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: July 11, 2000
    Assignee: Robert Bosch GmbH
    Inventor: Guenther Berger
  • Patent number: 6072252
    Abstract: A composite electric motor shaft including axially distributed metallic and nonmetallic sections joined together exhibit increased mechanical damping, increased rotor critical speed, improved corrosion resistance and improved motor performance.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: June 6, 2000
    Assignee: Electric Boat Corporation
    Inventors: Piet Van Dine, Vladimir Odessky, Brian E. Spencer, James S. Smith, William R. Harring
  • Patent number: 6066905
    Abstract: A dynamoelectric machine having a wire retaining device constructed to frictionally retain the quadrature winding to allow automated winding of the quadrature winding. The wire retaining device includes stator end caps having integrally formed wire retention elements at the radially inner end of the stator tooth. The wire retaining device frictionally holds the wire in place as the quadrature winding is automatically wound about the stator. In addition, the stator end caps electrically insulate the quadrature winding from the stator and the main winding.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: May 23, 2000
    Assignee: General Electric Company
    Inventors: Kamron M. Wright, David T. Molnar
  • Patent number: 6060802
    Abstract: A cooling fin is fixed to a frame and mounts a plurality of rectifying elements. The cooling fin is configured into a circular ring shape separated at a cutout section. A brush holder, a connector casing and an IC regulator are disposed in this cutout section. A circumferential gap of the cutout section is smaller than three times a circumferential width of the brush container.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: May 9, 2000
    Assignee: Denso Corporation
    Inventors: Makoto Masegi, Tsutomu Shiga, Koichi Ihata
  • Patent number: 6037687
    Abstract: A compound shaft coupling having a flexible disk shaft, with two flexible disks or diaphragms, and a tie bolt shaft connecting two rigid or stiff shafts. One flexible disk diaphragm of the flexible disk shaft is coupled with an interference fit to the first stiff shaft, while the other flexible disk diaphragm of the flexible disk shaft is coupled with an interference fit to the tie bolt shaft which removably mounts the second stiff shaft. A quill shaft connects the two flexible disk diaphragms of the flexible disk shaft. The first stiff shaft can be a hollow sleeve with a magnet mounted therein and the second stiff shaft or power head shaft may include a compressor wheel, a bearing rotor, and a turbine wheel removably mounted on the tie bolt shaft.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: March 14, 2000
    Assignee: Capstone Turbine Corporation
    Inventors: Matthew J. Stewart, Kenneth G. Roberts, Dennis H. Weissert, Robert W. Bosley
  • Patent number: 5942819
    Abstract: A combination motor brush support and electromagnetic suppression circuit comprises an assembly having a base which is affixable to a portion of a motor housing and which supports all components requiring precise mechanical alignment, including motor brushes, brush guides and brush springs. The base can also support the choke coils, and at least some of the capacitors of the noise suppression circuitry. The base includes a terminal support board affixed to, and projecting therefrom. The terminal support board has at least one of the capacitors of the noise suppression circuitry retained thereupon, and provides a set of motor contact terminals which are in electrical communication with the motor brushes supported on the base. The support member of the present invention functions as its own assembly tool for supporting and retaining the coils, capacitors, springs and the like.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: August 24, 1999
    Assignee: Alcoa Fujikura Ltd.
    Inventors: James P. Burgess, Douglas C. Stolicker, David J. Pearson, Christopher J. Volpe
  • Patent number: 5872413
    Abstract: A pedal activated motor attachment for a hand operated food grinder for allowing a user to convert a hand operated machine into a pedal driven machine. The inventive device includes a motor positioned within a housing. The motor powers a series of gears including a drive gear having a socket for receiving the grinder shaft of a hand operated food grinder. The housing has an aperture for receiving an attachment key of the hand operated food grinder whereby the grinder shaft is coupled to the drive gear. A foot pedal is electrically connected to the motor such that the motor is actuatable by depression of the foot pedal.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: February 16, 1999
    Inventor: Salvatore Magliari
  • Patent number: 5866966
    Abstract: An electrical machine such as a switched reluctance motor includes a stator including a stator body, a plurality of poles each having an energizing coil, and a rotor. Portions of the coils are retained in channels between adjacent poles and by a wedge tied at each end to projections extending from the stator body. The manner of retaining the wedge avoids disturbance of the flux linkage in the stator poles and allows improved locating and retaining of the coils in the channels between stator poles.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: February 2, 1999
    Assignee: Switched Reluctance Drives Limited
    Inventor: Norman Neilson Fulton
  • Patent number: RE38936
    Abstract: An antifriction bearing includes a fixed ring which comprises a steel containing up to about 10% of residual austenite. An alternator for vehicles includes a stator mounted on a frame, a rotor having its rotary shaft rotatably supported by a pair of bearings on the frame and a drive pulley mounted on one end of the shaft projecting outward from the frame. The outer ring of at least the bearing toward the pulley comprises a steel containing up to about 10% of residual austenite.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: January 17, 2006
    Assignees: Koyo Seiko Co., Ltd., Denso Corporation
    Inventors: Sigenobu Nakamura, Tutomu Siga, Kenzo Mitani, Yoshiki Fujita, Masayuki Kitamura, Hiroyuki Miyazaki, Teruo Hoshino