Patents Examined by Michael J. Sherry
  • Patent number: 7646577
    Abstract: A power plugging device with a function of releasing charges from electric surges serves for resolving problems caused by the switching surge generated by the electric system load switch, or the lightning surge generated directly or indirectly by the lightning. Accordingly, the damages of the electric appliances caused by electric pulses are avoided. A wrap layer forms between the plugging terminals. The wrap layer comprises a hollowed space. Furthermore, an electric discharging hole penetrates through the wrap layer from the hollowed space. Two terminals are mounted within the wrap layer and separated to each other for a certain distance. The tails of the two terminals are electrically connected to the plugging terminals respectively. While an instant high voltage/electric pulse generates, the terminals are used for point discharging. The hollowed space and the electric discharging hole form an electric discharging path for protecting the circuit.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: January 12, 2010
    Inventor: Ohara Takeyoshi
  • Patent number: 7525783
    Abstract: The invention relates to a monitoring method for an actuator (CP), in particular for a piezoelectric actuator (CP) on an injection valve for an internal combustion engine, comprising the following steps: measurement of the electrical current (iR1), flowing through the actuator (CP) in an actuator circuit, measurement of the electrical current (iR3), flowing before or after the actuator (CP) in the actuator circuit, comparison of both measured currents (iR1, iR2) for recognition of a fault and generation of a diagnostic signal (DIAG), displaying the fault, depending on the comparison. According to the invention, the diagnostic signal (DIAG) can take on at least three different values for the representation of an earth short-circuit, a voltage short-circuit and an error-free status depending on the comparison of the measured currents. The invention further relates to a corresponding driver circuit.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: April 28, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Eric Chemisky, Walter Schrod
  • Patent number: 7525777
    Abstract: A fireguard circuit for a power cable, which comprises a power line, a neutral line and a metal sheath surrounding the power line and the neutral line, includes a switch located in one of the lines. A solenoid sets the switch in either an open position or a closed position. A first silicon controlled rectifier (SCR) causes the solenoid to open the switch upon detecting the presence of an arcing condition between the power line and the metal sheath. A second silicon controlled rectifier (SCR) causes the solenoid to open the switch upon detecting the presence of an arcing condition between the neutral line and the metal sheath. The second SCR is connected in parallel with the first SCR, the anode of the first SCR being connected to the cathode of the second SCR and the cathode of the first SCR being connected to the anode of the second SCR.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: April 28, 2009
    Assignee: Tower Manufacturing Corporation
    Inventor: Victor V. Aromin
  • Patent number: 7515391
    Abstract: A bipolar semiconductor overvoltage protection circuit presents less capacitance to a communication line. The overvoltage protection circuit includes an overvoltage protection device that is biased with a voltage to not only reduce the capacitance thereof, but also to reduce the change in capacitance as a function of frequency. Changes in communication line voltages thus change the capacitance of the overvoltage protection device less, resulting in the ability to allow the transmission of high capacity data protocols with reduced error rates.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: April 7, 2009
    Assignee: Littlefuse, Inc.
    Inventor: Kelly C. Casey
  • Patent number: 7511935
    Abstract: An electrostatic chuck structure for holding an article is presented. The chuck structure comprises an electrically insulating chuck body layer having a first flat surface for holding the article thereon, and a second opposite surface having a honeycombed pattern in the form of an array of spaced-apart grooves. This second patterned surface of the chuck body surface for depositing thereon an electrically conductive layer (electrodes). A dielectric spacer between the electrodes and the article on the chuck body layer is defined by a portion of the chuck body layer between the grooves' bottom and the flat surface.
    Type: Grant
    Filed: February 27, 2006
    Date of Patent: March 31, 2009
    Assignee: Applied Materials, Israel, Ltd.
    Inventor: Shmulik Nakash
  • Patent number: 7511933
    Abstract: An over-voltage protection system including a phase bus connected to a phase conductor of an electrical system and one or more transient-suppressing lines connected to the phase bus. Each of the transient-suppressing lines includes a contactor and a transient-suppressing element. The contactor of each transient-suppressing line is selectively opened and closed by a processor, thereby protecting the transient suppressing element from excessive currents.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: March 31, 2009
    Assignee: Eaton Corporation
    Inventors: Thomas C. Hartman, Bryan Marsicano, W. Marshall Mauney, James I. Wise, Michael P. King
  • Patent number: 7508636
    Abstract: This invention relates to a circuit breaker device comprising a main branch (1) comprising a mechanical switch element (2) and an auxiliary branch (3) containing a semiconductor breaking cell (4), this auxiliary branch (3) being mounted in parallel with the main branch (1). The main branch (1) comprises a serial switching assistance module (M2) in series with the mechanical switch element (2), comprising a semiconductor breaking cell (5) controllable in opening in parallel with an impedance (Z1). The auxiliary branch (3) comprises a parallel switching assistance module (M4) comprising an impedance (Z2), this impedance (Z2) including at least one capacitor type element (C).
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: March 24, 2009
    Assignee: Societe Techique Pour l'Energie Atomique Technicatome
    Inventors: Pierre Sellier, Ronan Besrest, Claudio Zimmermann
  • Patent number: 7508097
    Abstract: A PCU having an inverter and the like includes a connector electrically connecting the PCU and external equipment located outside the PCU, a safety bar attaching the connector for preventing the connector from being touched, and an ECU detecting that an interlock circuit is opened via an interlock signal line in response to detachment of the safety bar to shut off supply of electric power to the PCU.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: March 24, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Norifumi Furuta, Masami Inagaki, Masaaki Kaneko, Tatsuya Kawai
  • Patent number: 7504749
    Abstract: An electrical switch unit (1, 60, 61, 70) is provided for controlling the supply of electrical energy to an appliance (7, 65) that also has its own electrical control switch (38), in particular a water heater. The switch unit has a normally open load switch operatively closed by a electronic timer means, and a bypass detector circuit (25) is connected in parallel across the load switch so as to become energized when the electrical control switch of a connected appliance is closed. The timer means is operative to become activated consequent on the initiation of current flow through the detector circuit to effect closure of said load switch after a predetermined optionally adjustable time delay (that is independent of real-time), and to maintain the load switch in a closed condition for a time period after which the load switch is returned to its normally open condition.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: March 17, 2009
    Inventor: Michael Von Seidel
  • Patent number: 7505238
    Abstract: An I/O ESD protection configuration of an integrated circuit that includes an ESD protection circuit connected between an I/O pad and an internal circuit at a first node and to an inductor at a second node. The inductor is connected between the second node and an external power supply. The external power supply provides a high reverse bias voltage across a diode of the ESD protection circuit. An ESD clamp is connected between the second node and a ground. An ESD discharge current is shunted through the ESD protection circuit and through the ESD clamp during a positive I/O ESD event. The inductor can be chosen to tune out a parasitic capacitance of the ESD clamp. The inductor can also block high frequency signals between the I/O pad and the external power supply, thereby minimizing the parasitic capacitance of the diode of the ESD protection circuit at high frequency.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: March 17, 2009
    Inventors: Agnes Neves Woo, Chun-Ying Chen
  • Patent number: 7505242
    Abstract: The invention relates to a method for applying a magnetic mark to a rotatable article (1) to be positioned, to a corresponding device and to a system (2) consisting of a device for applying a magnetic mark and a device (25) for determining the angle of rotation. In the region that comprises magnetizable material of the rotatable article to be positioned and is selected for determining the angle of rotation, a magnetic dipole is generated as a magnetic mark by a magnetic field, by means of the device for applying a magnetic mark. Said mark is used for determining the angle of rotation of the rotor.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: March 17, 2009
    Assignee: Schenck RoTec GmbH
    Inventor: Peter G├╝llich
  • Patent number: 7505240
    Abstract: An overcurrent protecting device for protecting a semiconductor element from an overcurrent includes: the semiconductor element; a shunt resistor for detecting the overcurrent when the electric current in the semiconductor element exceeds a threshold value; a reference resistor for setting the threshold value; a constant electric current circuit for supplying a constant electric current to the reference resistor; and a comparator for comparing a terminal voltage of the shunt resistor and a terminal voltage of the reference resistor. The shunt resistor is made of a same kind of resistor as the reference resistor.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: March 17, 2009
    Inventors: Tadatoshi Asada, Hideto Okahara, Susumu Ueda
  • Patent number: 7502215
    Abstract: A method for directing a current generated by a lightning striking a wind turbine is described. The method includes directing the current from a main shaft of the wind turbine to a brake disc attached to the shaft, and directing the current from the brake disc to one of a spark gap and a roller mechanism coupled to a down-conductor at a ground voltage.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: March 10, 2009
    Assignee: General Electric Company
    Inventors: Florian Krug, Stefan Brokfeld, Ralph Teichman
  • Patent number: 7501716
    Abstract: A power supply apparatus that output two types of power supply includes a first series regulator for outputting power supply to a first power supply line, a second series regulator for outputting power supply to a second power supply line, an OR circuit for outputting High level signal to activate the first series regulator upon when detecting presence of either one of output from the second series regulator and an activation command by an ON/OFF control signal, and an AND circuit for outputting High level signal to activate the second series regulator when detecting presence of both of output from the first series regulator and an activation command by the ON/OFF control signal.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: March 10, 2009
    Assignee: NEC Electronics Corporation
    Inventor: Shigeto Nakajima
  • Patent number: 7498862
    Abstract: A switch provided between a first terminal and a second terminal with a varying cross terminal voltage. The switch contains two transistors, with the source terminal of the first transistor being coupled to the first terminal and a drain terminal of the second transistor being coupled to the second terminal. The gate terminal of the first transistor is coupled to the first terminal, the gate terminal of the second transistor is coupled to the second terminal, and the drain terminal of the first transistor is coupled to the source terminal of the second transistor. Due to such a topology, the cross-terminal voltage across the first and second terminals can be substantially higher than the voltage of the control signal indicating whether the switch is to be in on or off state.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: March 3, 2009
    Assignee: Texas Instruments Incorporated
    Inventor: Ravishankar S. Ayyagari
  • Patent number: 7499255
    Abstract: A vacuum-type electrical switching apparatus (10) for high voltage electrical power. A vacuum pressure condition in a vacuum pressure space (21) surrounding electrical contact points (18) is monitored and movement of the contact points between open and closed positions is automatically prevented when the pressure exceeds a predetermined threshold in order to avoid destructive arcing between the points. A sensor (32) provides a vacuum signal (34) responsive to the vacuum pressure condition. A controller (36) automatically inhibits movements of the contact points when the vacuum signal indicates that the vacuum has degraded. A contactor (38) may be placed in series with power supply (28) and a solenoid (24) used to move the contact points, with the contactor being automatically opened by the controller in response to the degraded vacuum condition.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: March 3, 2009
    Assignee: Thomas & Betts International, Inc.
    Inventors: James Francis Domo, Lance Patrick Sabados, Steven Jay Randazzo, Roderick C. Mosely, Joseph Emil Oeschger, Mary Grace Bello Montesclaros
  • Patent number: 7495875
    Abstract: A power abnormal protection circuit includes a power detection unit, a voltage drop correction unit, a drop out detection unit, a delay unit and a delay masking unit. By detecting an input power average value of a power supply occurring of a brown out condition can be determined. The power supply includes a power factor correction unit which has an output capacitor. By detecting the voltage of the output capacitor a drop out condition can be determined. When a power abnormal condition occurs all units of the power supply can be set off sequentially according to a delay time to protect circuit elements and a connecting computer.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: February 24, 2009
    Assignee: FSP Technology Inc.
    Inventor: Kuo-Fan Lin
  • Patent number: 7495357
    Abstract: A circuit which produces a current pulse through a load element, includes a primary energy storage unit and a secondary energy storage unit which can be charged up by the primary energy storage unit; an opening switching element which is configured to interrupt or establish a connection between the primary energy storage unit and the secondary energy storage unit; and a closing switch, which is configured to interrupt or establish a connection between the secondary energy storage unit and the load element and a counter current element which is connected to the opening switching element such that a counter current flows from the counter current element through the opening switching element when the closing switch is closed.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: February 24, 2009
    Assignee: Deutsch-Franzosisches Forschungsinstitut Saint-Louis
    Inventors: Volker Brommer, Emil Spahn
  • Patent number: 7495356
    Abstract: An exemplary dual power supply system includes a first sensor connected to a first power supply, a second sensor connected to a second power supply, a selection switch, a control circuit, and a relay switch. Each of the output terminals of the first sensor, the second sensor, and the selection switch are connected to a corresponding input terminal of the control circuit. The first and the second power supplies are connected to an electronic device via the relay switch. A control terminal of the relay switch is coupled to an output terminal of the control circuit for selectively coupling the first or the second power supply to the electronic device according to a control signal generated by the control circuit.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: February 24, 2009
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Heng-Chen Kuo
  • Patent number: 7492566
    Abstract: A transient blocking unit (TBU) having reduced series impedance is provided. A TBU includes two or more depletion mode transistors arranged to provide a low series impedance in normal operation and a high series impedance when the input current exceeds a predetermined threshold. A nonlinear impedance element is included in the TBU that acts as a current limiter having a substantially constant saturation current over a range of applied voltages. This saturation current is selected to be the threshold current of the TBU. When the threshold is exceeded, the voltage developed across the nonlinear impedance element tends to drive the TBU into its high impedance state. When the operating current is below threshold, the TBU series resistance is relatively low because the nonlinear impedance element is in its low-resistance state. The nonlinear impedance element can be a separate circuit element, or it can be integrated with one or more of the TBU transistors.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: February 17, 2009
    Assignee: Bourns, Inc.
    Inventor: Richard A. Harris