Patents Examined by Thomas J. Kozma
  • Patent number: 6160464
    Abstract: A dry-type transformer having an iron core, with high voltage and low voltage coils encapsulated in casting resin. The high and low voltage windings may be cast separately, or together. Either or both of the coils may have integral axial cooling channels, as may the annular axial space between the inner and outer windings (usually low voltage and high voltage, respectively). Coil cross-section is a modified oval (Rectoval.TM.) shape, in that the sides of the coil are substantially linear and the ends of the coils are substantially semi-circular. The aspect ratio (L/W) of the coil, when viewed in radial cross-section, ranges from greater than 1.0 to about 2.5. The rectangular nature of the coil allows for the use of a core member having a rectangular cross-section, thereby reducing the manufacturing expense involved with shaping the core member. The circular nature of the ends of the coil provide improved strength similar to that of circular/cylindrical coils.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: December 12, 2000
    Assignee: Dynapower Corporation
    Inventors: Peter William Clarke, George Scott Hood, Alan Scott Gould
  • Patent number: 6160467
    Abstract: In one embodiment of the present invention, a transformer includes a first secondary winding made of stamped and bent metal. This first secondary winding has a coil portion with substantially closed cross section. The transformer also includes a primary winding made of wire and having a coil portion wound around the coil portion of the first secondary winding. A second secondary winding made of stamped and bent metal and having a coil portion with substantially closed cross section has its coil portion disposed about the coil portion of the primary winding. The primary winding further includes a second coil portion wound around the coil portion of the second secondary winding. The transformer thus provided is easier to build and less apt to internal short-circuiting than alternative designs.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: December 12, 2000
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Mehrdad Teimorzadeh, John Bernard Huss
  • Patent number: 6154111
    Abstract: The storage coil has a core and windings which are arranged as conductor tracks on base layers. The base layers each contain only one winding, whose start and end are each passed out on one or more projections on the outer edge of the base layer. In consequence, the projections project out of an opening in a core, for example an E/I core, on which projections the windings of the base layers make contact with one another and with connections. With suitable dimensioning, losses resulting from the skin effect and eddy current losses can be kept very low.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: November 28, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Markus Rehm, Thomas Riesle, Jose-I. Rodriguez-Duran
  • Patent number: 6147580
    Abstract: An improved low voltage winding for dry insulated transformer has its windings resin encapsulated. The winding is constructed with flexible sheet conductors wound coincident with an insulating sheet material. Insulating spacers provide a means to form air channels in the windings during the coil forming process. A sealant is applied to openings at the lower ends and along vertical seams of the coil prior to the resin impregnation and encapsulation process. This will prevent drainage of the resin during a curing cycle. The result is a coil that exhibits high short circuit protection due to the tightly bond sheet conductors which will prevent movement of the conductors during short circuit conditions and also increases the radial compressive strength of the coil.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: November 14, 2000
    Assignee: Square D Company
    Inventors: Richard Raymond Rettew, Scott Frederick Lett, Philip John Hopkinson
  • Patent number: 6144280
    Abstract: A wire wound electronic component of the present invention includes a bobbin having a core 1a having a substantially circular cross-section and rectangular flanges 1b formed at both ends of the core. A groove 2 is formed in each side of each flange 1b. A conductive film or external electrode 3 is formed on each flange 1b. A coil or wire 4 is wound round the core 1a and has a conductor protruding from opposite stripped ends thereof. The opposite ends 5 of the conductor are respectively received in the grooves 2 of the flanges 1b and connected to the conductive films 3. A coating or armor 6 is formed on the coil 4 and has a flat surface 6a. The coating 6 has a rectangular figuration complementary to the configuration of the flanges 1b.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: November 7, 2000
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Yoshihiro Amada, Hideo Aoba, Kazuhiko Otsuka, Nobuhiro Umeyama, Katsuo Koizumi, Nobuo Mamada, Iwao Fujikawa, Nobuyasu Shiba, Takayuki Uehara
  • Patent number: 6144277
    Abstract: An electric noise absorber comprising at least two ferrite pieces having abutting planes, at least two case members containing the ferrite pieces respectively and being closed by means of engagement members, and a spring member provided in at least one of the case members for pressing the ferrite pieces against each other when the case members are closed. Since the case members for keeping the ferrite pieces in appropriate positions and the spring member for pushing up the ferrite pieces for close contact are separately molded, the case members are bestowed with strength and the spring member with elasticity, both suitable for their own purposes. The case members requires no apertures for biasing members and therefore outside magnetic substance is prevented from contacting with the ferrite pieces contained in the case members.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: November 7, 2000
    Inventors: Kazuhiro Matsui, Hiroji Kitagawa
  • Patent number: 6140902
    Abstract: A thin magnetic element which comprises a coil pattern formed on at least one side of a substrate and a thin magnetic film formed on the coil pattern, wherein:said thin magnetic film is for++med to a thickness of 0.5 .mu.m or greater but 8 .mu.m or smaller;and at least one of the following conditions, that is, assuming that the thickness and width of a coil conductor constituting the coil pattern are t and a, respectively, an aspect ratio t/a of the coil conductor satisfies the following relationship: 0.035.ltoreq.t/a.ltoreq.0.35;and assuming that the width of the conductor constituting the coil pattern is a and the distance between the mutually adjacent coil conductors in the coil pattern is b, the following relationship: 0.2.ltoreq.a/(a+b) is satisfied.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: October 31, 2000
    Assignee: Alps Electric Co., Ltd.
    Inventors: Kiyohito Yamasawa, Yasuo Hayakawa, Takashi Hatanai, Akihiro Makino, Yutaka Naito, Naoya Hasegawa
  • Patent number: 6137389
    Abstract: The present invention is directed to an inductor element for noise suppression capable of suppressing the high frequency component in the GHz band through absorption.A core for passing through a signal line conductor is provided. The core is at least partially constituted with a compound member that is prepared by mixing ferromagnetic metal particles and resin. The compound member imparts a frequency-dependant absorption loss to a signal running through the signal line conductor. The absorption loss starts essentially in the GHz band and the high level of absorption remains in effect up to at least 20 GHz.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: October 24, 2000
    Assignee: TDK Corporation
    Inventor: Fumio Uchikoba
  • Patent number: 6127911
    Abstract: Transformer comprises a core (K1, K2), a primary winding (W1) and at least one secondary winding (W2), which are arranged as conductors on one or more layers of a flat carrier, and a coil former with a chamber system having chambers (C1, C2), which accommodate the layers with the windings (W1, W2). At least one of the chambers (C1, C2) is closed at least in regions, with the result that long distances for creepage paths are obtained. As a result of this, it is possible to adhere to existing safety regulations for the mains power supply isolation even with very compact dimensions and/or with full utilization of the width available for the conductor tracks. The chamber system can be formed from two or three plastic parts (P1, P2, P3) by mating. The layers with the conductor tracks are routed laterally out of the chamber system in order to make contact with terminals.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: October 3, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Hans-Otto Haller, Gerard Rilly, Jose-I Rodriguez-Duran
  • Patent number: 6121866
    Abstract: A surface-mount air-core coil has a coil body formed by winding a conductive wire spirally and mount legs formed by folding both ends of the conductive wire horizontally toward the inside. The lower surfaces of the mount legs are positioned below the lower surface of the coil body. The length of the mount legs is set longer than the width of the coil body.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: September 19, 2000
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Takashi Maruyama
  • Patent number: 6118364
    Abstract: The object of the present invention is to provide a chip inductor structured for miniaturization excellent mass-producibility and high reliability.A chip inductor of a sealed type having a square-shaped winding comprises a bobbin for winding, which has a square-shaped flange on its both ends, and a metal terminal sticking out from the outer side surface of each respective flange and each respective metal terminal being bent inside each respective flange upward so as to stick out to the upper side surface of the flange, also have the foregoing metal terminal further bent along the upper side surface of the flange, and further make insert-molding of the foregoing bent terminal possible to form the bobbin for winding.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: September 12, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunji Hashimoto, Mikio Taoka, Hideo Nakano
  • Patent number: 6114932
    Abstract: An inductive component including a primary coil having first and second terminals, and a secondary coil including a coil substrate, wiring patterns, and conductive terminals. The coil substrate is provided with alignment recesses for receiving and locating the first and second terminals of the primary coil in a fixed relationship to each other and to the conductive terminals of the secondary coil and an inductive component assembly having the inductive component is mounted outside a periphery of a substrate. A magnetic core of the inductive component has a central portion which is displaced off an edge of the magnetic core and has bevelled edges at a base of the central portion of the magnetic core. Terminals of both the primary coil and the secondary coil are located close together on the same side of the inductive component to reduce thermal stress.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: September 5, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Henrik Wester, Per Ferm, Jan Ohrn
  • Patent number: 6114936
    Abstract: A multilayer coil has a significantly reduced size but still provides a large inductance and a high Q-value. The multilayer coil includes insulative sheets which are respectively provided with coil conductors and via holes and which are laminated and fired. The coil conductors are electrically connected in series through the via holes so as to form a spiral coil. The via holes are disposed at approximately central portions of the side edge surface at the rear of the multilayer type coil, while the via holes are disposed at approximately central portions of the side edge surface at the front thereof.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: September 5, 2000
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Shigekatsu Yamamoto, Katsuyuki Uchida
  • Patent number: 6094109
    Abstract: A power takeoff inductor is an inductor comprised of a hybrid core. Materials with varying low and high permeabilities are combined to create a common hybrid core for the inductor. The inductor can be used in power transmission systems where signals of lower frequencies are transmitted along the same conductors with signals extending across a broad range of higher frequencies. The inductor is used to extract signals having low frequencies without degrading other high frequency signals.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: July 25, 2000
    Assignee: ADC Telecommunications, Inc.
    Inventors: Clarke V. Greene, Leonel Espirito Santo
  • Patent number: 6091590
    Abstract: An electromagnetic coil assembly for an electromagnetic device comprises a bobbin, a multiple turn winding of electrical wire supported on a flange of the bobbin and a thermal protection device including a pair of lead wires extending from both sides thereof. The first lead wire is connected to one end of the multiple turn winding by a first joining member. The second lead wire is connected to an electric circuit by a second joining member. A connecting device, disposed on an outboard surface of one of the flanges of the bobbin, receives the thermal protection device, the first joining member and the second joining member.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: July 18, 2000
    Assignee: Sanden Corporation
    Inventor: Yuki Sakamoto
  • Patent number: 6087917
    Abstract: A package for an electronic device, the electronic device including a body having a cavity therein, the body subject to stress from imposition of forces. The package includes a conforming compressible material disposed within at least a portion of the cavity in the body and substantially conforming to an interior configuration of the cavity, reducing imposition of the forces within the cavity and thereby reducing the stress on the body.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 11, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Robert Joseph Roessler, John Albert Sparkes, Jr., William Lonzo Woods, Jr.
  • Patent number: 6087920
    Abstract: A monolithic inductor (10) comprises an elongated substrate having opposite distal ends (14) and (16), each end having an end cap extending from the opposite ends to support the substrate (12) in spaced relation from a PC board, the end caps being formed with non-mounting areas and a deflection area for preventing the substrate resting on the non-mounting area, a substantially steep side wall (16) on the substrate side of the end cap (14) at the non-mounting area, and an inclined ramp extending up to a top of the end cap on the substrate side substantially opposite the non-mounting area, an electrically conductive soldering band (30) extending partially around each end cap, each soldering band having a gap (34) at the non-mounting area for thereby reducing parasitic conduction in the band (30), and an electrically conductive layer formed on the substrate in a helical path extending between the opposite ends and in electrical contact with the conductive soldering bands (30) at the ramps (120).
    Type: Grant
    Filed: February 11, 1997
    Date of Patent: July 11, 2000
    Assignee: Pulse Engineering, Inc.
    Inventor: Igor Abramov
  • Patent number: 6078239
    Abstract: A high-frequency transformer, comprises: a ring core made of amorphous magnetic material; a core protection box made of conductive material and enclosing the ring core; and a high-voltage winding, consisting of enamel-insulated wire wound on the core protection box. Wherein, on the ring top wall of the core protection box there is a ring gap in the peripheral direction, and at inner fringe and outer fringe of the ring gap, a plurality of leading wires are respectively arranged in the peripheral direction. The leading wires at inner fringe and outer fringe of the ring gap are electrically-connected together respectively and form two terminals. The core protection box and the two terminals constitute low-voltage winding of the high-frequency transformer. If the low-voltage winding comprises two or more core protection boxes, it can have a central tap or have multi-turn. A thus fabricated high-frequency transformer has a smaller size, a lighter weight and is more apt to industrial batch manufacture.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: June 20, 2000
    Assignees: Suzhen Hu, Li Zhang
    Inventor: Suzhen Hu
  • Patent number: 6078241
    Abstract: A noise absorber capable of preventing a cable from becoming damaged with a high degree of reliability while demonstrating outstanding noise absorbing characteristics is provided with a cover 1 and a pair of ferrites 21 and 22. The cover 1 is constituted through the combination of a first cover 11 and a second cover 12. The first cover 11 is provided with a ferrite storage portion 110 and a cable storage portion 111. The second cover 12 is provided with a ferrite storage portion 120 and a cable storage portion 121 . The ferrite storage portion 110 is formed at an internal surface of the first cover 11 and the ferrite storage portion 120 is formed at an internal surface of the second cover 12. The cable storage portion 111 is formed adjacent to the ferrite storage portion 110 at a side thereof, whereas the cable storage portion 121 is formed adjacent to the ferrite storage portion 120 at a side thereof.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: June 20, 2000
    Assignee: TDK Corporation
    Inventors: Yuetsu Watanabe, Hiroyuki Uemura
  • Patent number: 6075430
    Abstract: The invention relates to an inductive component that comprises a magnetic core (1), coil (6) and yoke (7, 10). According to the invention, the magnetic core (1) comprises a cylinder (2) that has been wound from wide strip material around a non-magnetic material (5) such as to obtain planar outer ends (8, 9). Two flanges (3, 4) are wound from two narrow strips at the outer ends (8, 9) of the cylinder. The coil (6) is wound around the centre part of the cylinder (2) between the flanges (3, 4). Finally, the yoke (7, 10) is wound from strip material around the magnet core (1).
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: June 13, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: Arne Bengt Lindqvist