Patents Examined by Peter S. Wong
  • Patent number: 6404167
    Abstract: The battery charging device obtains an open-circuit voltage at the time of 70% capacity based on information stored in a ROM of a battery package prior to the charge, and upon measuring an open-circuit voltage of the battery package by a voltage measuring portion, if this open-circuit voltage is higher than the obtained open-circuit voltage, a second indicator is switched ON to indicate that the remaining capacity is not less than 70% to thereby enable discrimination among batteries requiring charge or that do not prior to starting charging.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: June 11, 2002
    Assignee: Makita Corporation
    Inventor: Kazuyuki Sakakibara
  • Patent number: 6404170
    Abstract: An electrical storage capacitor system that efficiently initializes itself to its initial state during pause intervals between charging/discharging cycles of operation without providing any special initializing cycles. The capacitor system comprises capacitors connected in series to store electricity, a variation decision means for judging the amount of variation in amount of charge between the capacitors, an operation decision means for judging whether the capacitors are being charged or discharged, and a initializing charging means for charging the capacitors to initialize themselves to their initial state according to the results of decisions made by the variation decision means and by the operation decision means.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: June 11, 2002
    Assignees: JEOL, Ltd., Okamura Laboratory, Inc., Kabushiki Kaisha Powersystems
    Inventors: Michio Okamura, Akinori Mogami
  • Patent number: 6404609
    Abstract: The described circuit is an intrinsically safe circuit configured for supplying intrinsically safe power from a power supply in a hazardous environment. The intrinsically safe circuit reduces a number of node connections by reducing a number of components. The intrinsically safe circuit comprises an opto-coupler circuit configured for receiving a control signal, a resistor, and a single voltage limiting circuit. The reduction in components and node connections results in a reduction of board costs and area, while maintaining a desired level of protection.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: June 11, 2002
    Assignee: Micro Motion, Inc.
    Inventors: William M. Mansfield, Craig B. McAnally
  • Patent number: 6405271
    Abstract: A data flow control mechanism for a bus supporting two- and three-agent transactions includes a control logic to place an indication of a request onto a computer system bus. The agent placing the indication on the bus then waits to place data corresponding to the request onto the bus until it has received an indication from another agent coupled to the bus that the other agent is ready to receive the data.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: June 11, 2002
    Assignee: Intel Corporation
    Inventors: Peter D. MacWilliams, Nitin V. Sarangdhar, Stephen S. Pawlowski, Gurbir Singh
  • Patent number: 6400579
    Abstract: Soft switching DC-to-DC converter operates at record high efficiency despite its small size and weight and ultra high overload current capability of several times the nominal load current. Such performance is made possible by use of unique magnetic and switching circuits with special properties. Other desirable performance features are provided concurrently such as: zero ripple current on input and output, low conducted and radiated Electromagnetic interference (EMI) noise, as well as low component stresses for increased converter reliability.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: June 4, 2002
    Inventor: Slobodan Cuk
  • Patent number: 6400538
    Abstract: An energy storage system for use in a magnetic pulse welding and forming apparatus includes a bank of capacitors and a very-low inductance conductive bus system interconnecting the capacitors. The bus system provides the ability to generate a very high frequency, short duration impulse which is needed for welding. The bus system includes first, second and third flat bus panels disposed in closely spaced overlying relation. The second, or middle, bus panel is the “hot” bus and is electrically insulated from the first (lower) and third (upper) bus panels by sheets of electrically insulating material. The first and third bus panels are connected together cooperatively form a ground bus. The bus system overlies the upper ends of the capacitors wherein the second bus panel is electrically interconnected to the respective hot contacts of the capacitors, and further wherein the ground bus is electrically interconnected with the respective ground contacts of the plurality of capacitors.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: June 4, 2002
    Assignee: INLI, LLC
    Inventors: Ludmila Kistersky, Daniil Dudko, Viatcheslav Shevchenko, Thomas A. Barber, Jr.
  • Patent number: 6397349
    Abstract: A reconfiguration memory device is provided associated with a main memory array. The reconfiguration memory device generates a spare address in real time corresponding to a faulty address. The reconfiguration memory device is coupled to an address line, so that when address information is received for the main memory array, the address information is also received by the reconfiguration memory device. The reconfiguration memory device is adapted to send an output signal that results in the address in the spare memory address array being addressed, if the received address information corresponds to a stored faulty address. The output signal includes a spare control signal that directs components to look to the output of the spare memory.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: May 28, 2002
    Assignee: Agere Systems Guardian Corp.
    Inventors: Frank P. Higgins, Ilyoung Kim, Goh Komoriya, Hai Quang Pham, Yervant Zorian
  • Patent number: 6392907
    Abstract: An NPC inverter control system includes a DC power source having a neutral point corresponding to a junction of a pair of capacitors connected in serial one another, a positive electrode and a negative electrode, at least one multi-level inverter circuit having a plurality of semiconductor devices coupled to the DC power source and configured to invert the DC power to an AC power and to supply the AC power to a load, and a plurality of saturatable reactors configured to join the positive and negative electrodes of the DC power source to the multi-level inverter circuit.
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: May 21, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kosaku Ichikawa
  • Patent number: 6392389
    Abstract: In a method for monitoring the charging of gastight alkaline rechargeable batteries, the characteristics of the critical charging voltage (Ucrit) on a rechargeable battery are determined as a function of the charging current (I) for various temperatures (T) and are linearized by means of a function in the form A(I)×T+B(I). The value pairs A and B are stored as parameter arrays in a battery management system, and during operation of a physically identical rechargeable battery which is to be monitored, the associated critical charging voltage is calculated by measuring the temperature and charging current and is used to control the charging of the rechargeable battery. On reaching the critical charging voltage (Ucrit) which corresponds to the critical state of charge (LZcrit), the value of the critical state of charge can be calculated by measuring the current (I) and temperature (T).
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: May 21, 2002
    Assignee: NBT GmbH
    Inventor: Uwe Köhler
  • Patent number: 6392859
    Abstract: A bidirectional switching device has a first main semiconductor element and a second main semiconductor element. The first main semiconductor element has a first main electrode connected to an ungrounded side of an AC power source, and a second main electrode. The first main semiconductor element contains a first parasitic diode whose cathode region is connected to the first main electrode and whose anode region is connected to the second main electrode. The second main semiconductor element has a third main electrode connected to the second main electrode, and a fourth main electrode connected to a load. The second main semiconductor element contains a second parasitic diode whose anode region is connected to the third main electrode and whose cathode region is connected to the fourth main electrode.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: May 21, 2002
    Assignee: Yazaki Corporation
    Inventor: Shunzou Ohshima
  • Patent number: 6392384
    Abstract: A battery charger for charging at least two storage batteries, comprises: a first charging pocket for receiving a first storage battery; a second charging pocket for receiving a second storage battery; a main controller for generating a power supply control signal, charging voltage setting control signal according to the voltage types of the batteries inserted in the first and second charging pockets, and charging current setting control signal according to the current capacities of the batteries; a voltage adjustment circuit for adjusting the charging voltage to the levels respectively fit for the voltage types of the batteries according to the charging voltage setting control signal; a current adjustment circuit for adjusting the charging current to the levels respectively fit for the current capacities of the batteries according to the charging current setting control signal; and a power supply control circuit for supplying or blocking the charging voltages to the batteries according to the power supply co
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: May 21, 2002
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-Moo Hwang Bo, Chang-Sik Park, Dong-Wook Gwak
  • Patent number: 6392390
    Abstract: A synchronous switching apparatus for detecting a source voltage of each phase to close each phase at an electrical phase angle predetermined for each phase, including switching devices 1a-1c provided one for each phase for opening and closing an impedance load, switching devices 2a-2c for closing and opening the switching devices 1a-1c for each phase, measuring transformers 5a-5c for measuring source voltages of the respective phases and phase-to-phase voltages, and phase control devices 42 each for issuing a command for energizing the impedance load at an electrical phase angle in a range predetermined for each phase, when detecting a zero point of a source voltage of each phase or a zero point of each phase-to-phase voltage.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: May 21, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroki Ito, Haruhiko Kohyama, Mikio Hidaka
  • Patent number: 6392393
    Abstract: A method of voltage driving a load using a controlled current includes providing a negative feedback of an output current, measuring the output current on a collector of an output transistor of an output stage, comparing the measured output current with an input current to define a current difference, and providing the current difference at a base of the output transistor to provide the voltage driving.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: May 21, 2002
    Assignee: STMicroelectronics S.R.L.
    Inventors: Davide Brambilla, Giovanni Capodivacca, Danilo Ranieri
  • Patent number: 6389557
    Abstract: A system for freezing a communication device in a debug mode has a clock control circuit arranged to produce an internal clock signal in response to an external clock signal. When a stop signal is asserted, the internal clock signal is fixed in its off state. As a result, operations of internal registers supplied with the internal clock signal freeze in a chosen state. A scan test may be performed to examine the internal registers in the chosen state. A bypass clock signal is supplied to control the internal clock signal so as to move the internal registers from one state to another. Thus, an event that causes an error may be recreated.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: May 14, 2002
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Ching Yu, Din-I Tsai, Jeffrey Dwork, Jerry Kuo
  • Patent number: 6388904
    Abstract: A power supply device for an electromotive railcar, including a series circuit composed of a plurality of first capacitors, connected to receive a first DC voltage from an electric power line; a plurality of DC/AC/DC converters. Each of the DC/AC/DC converters including an inverter bridge with an input thereof connected in parallel to one of the first capacitors and having a plurality of power transistors, an insulating transformer with a high carrier frequency and having a primary winding connected to an output of the inverter bridge, and a rectifier circuit connected to a secondary winding of the insulating transformer to output a DC voltage.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: May 14, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yoshihito Nomura
  • Patent number: 6388450
    Abstract: A method for determining the state of charge of a storage battery, wherein at least two methods of different approach for determining state of charge are simultaneously applied. The individually obtained results of the different methods are weighted in accordance with their respective reliability in the respective current or former operating situation of the storage battery, and the weighted mean value of the individual methods thus obtained is used as final output variable of the method and displayed. The voltage of the storage battery, the current flowing through it and its temperatures are measured, and the different methods use these input variables and variables derived from these input variables as final input variables. At least one of the different methods uses the integration of the current flowing through the storage battery to determine the changes in the charge content of the storage battery.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: May 14, 2002
    Assignee: VB Autobatterie GmbH
    Inventors: Gerolf Richter, Eberhard Meissner
  • Patent number: 6388447
    Abstract: The subject invention pertains to a method and apparatus for recalibrating and/or estimating a battery's state of charge (SOC). The subject invention is advantageous in situations where the battery infrequently, if ever, reaches a full charge and/or a full discharge. In a specific embodiment, the subject method and apparatus can utilize a battery's voltage and/or current, and/or changes in a battery's voltage and/or current with time, to recalibrate and/or estimate the battery's SOC. The method and apparatus of the subject invention can monitor various parameters relating to the condition of the battery in order to determine where on the open circuit voltage (OCV) versus SOC curve, the dOCV/dSOC versus SOC curve, and/or d2OCV/dSOC2 versus SOC curve the curve the battery is and, in a specific embodiment, when the battery reaches inflection point of the OCV versus SOC curve.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: May 14, 2002
    Assignee: Moltech Power Systems, Inc.
    Inventors: A. Daniel Hall, Richard A. Hudson
  • Patent number: 6384573
    Abstract: A self-contained, battery powered, on board auxiliary starting device provides high DC power levels for short durations for starting engines. Preferred devices have a battery, a connector terminal assembly, and a monitor/control circuit that controls the charging and use of the auxiliary battery, and limits the device output to safe voltage levels so the auxiliary battery is not damaged due to overdischarge. The connector terminal assembly preferably has 2 or more contacts, sized and dimensioned to electrically contact (mate) with selected electric power harnesses selected to connect to and provide auxiliary power to augment standard batteries. In another aspect of preferred embodiments, the coupling mechanism and mounting bracket allow the battery to be quickly removed from the principal mounting bracket and quickly installed on another engine or be connected to a special set of mating cables with clamps for attachment across another battery for augmenting its power.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: May 7, 2002
    Inventor: James Dunn
  • Patent number: 6385024
    Abstract: A method for monitoring current in a power supply system including multiple parallel power supplies and current load sharing devices for each power supply. The error voltage generated by the current load sharing devices, in the process of balancing the power supply outputs, is proportional to current provided by a single power supply. The total number of power supplies may be determined by including a small current source with each power supply, and using the current sources to drive a “present” line, the current on this line indicating the number of power supplies present. The error voltage and the present line signal are used by a control circuit that includes analog-to-digital conversion and a CPU to calculate the total current drawn by the supply, and to trigger a circuit breaker if the total current exceeds a predetermined limit.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: May 7, 2002
    Assignee: SS8 Networks, Inc.
    Inventor: Philip D. Olson
  • Patent number: 6384576
    Abstract: The invention relates to a control system of battery health. One or more cells of a float charged battery are shunted periodically through a current generator; or through a switch and a resistor. The system measures impedance and/or state of charge by sampling the change in cell voltage during a shunt period or between sequel shunt periods.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: May 7, 2002
    Inventor: Usko Jokinen