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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 8177519 | Controller for a motor and a method of controlling the motor A pumping apparatus for a jetted-fluid system includes a pump having an inlet connectable to the drain, and an outlet connectable to the return. The pump is adapted to receive the fluid from the drain and jet fluid through the return. The apparatus includes a motor ... | 05/15/2012 |
| 8118565 | Blower and electric device with such blower mounted thereon A supply current control circuit controls the voltage of a low-voltage direct-current power source so that the average current of an inverter circuit detected by a current detecting circuit becomes constant at a specified current value. Accordingly, characteristics ... | 02/21/2012 |
| 8109736 | Apparatus and method for controlling operation of a linear compressor using a phase difference inflection point detecting unit An apparatus and method for controlling an operation of a linear compressor by detecting a phase difference inflection point at a time point when a phase difference between a current and a stroke is placed within a certain region, and by recognizing the phase differ... | 02/07/2012 |
| 8100668 | Apparatus and method for controlling operation of a linear compressor using a detected inflection point An apparatus and method for controlling an operation of a reciprocating compressor are disclosed in which a point of inflection with respect to an operation frequency of the reciprocating compressor is detected at a point of time when a phase difference between curr... | 01/24/2012 |
| 8092190 | Systems and methods for reducing pump downtime by determining rotation speed using a variable speed drive Systems and methods for using variable speed drives to restart downhole submersible pump motors. In one embodiment, a downhole pump is controlled using a variable speed drive that includes a control system configured to detect interruptions in the operation of the p... | 01/10/2012 |
| 8070457 | Method for determining faults during the operation of a pump unit A method is provided for determining faults during the operation of a pump unit. At least two electric variables that determine the electric output of the motor and at least one fluctuating hydraulic variable of the pump are detected. The detected values or values f... | 12/06/2011 |
| 8033796 | Motor-mounted internal gear pump and manufacturing method thereof and electronic equipment To maintain the functionality as a compact and inexpensive motor-mounted internal gear pump and also offer further inexpensiveness and reliability. The motor-mounted internal gear pump 80 has a pump part 81 including: an inner rotor 1, an outer ... | 10/11/2011 |
| 8007247 | End of stroke detection for electromagnetic pump Detection of end of stroke for an electromagnetic pump is performed using, for example, a calculated first flux derivative. ... | 08/30/2011 |
| 7997877 | Scroll compressor having standardized power strip A scroll compressor for compressing fluid has a common terminal block for electrical hook-ups. The compressor includes a compressor section; a drive unit operative to drive the compressor section for compressing fluid; a protection module; and a power connector for ... | 08/16/2011 |
| 7857600 | Pump controller system and method A method and apparatus for a pump control system. One or more embodiments of the invention include a pump controller that can perform a self-calibrating procedure, can provide precise motor speed control, can provide a limp mode before shutting down the motor when s... | 12/28/2010 |
| 7854597 | Pumping system with two way communication A pumping system for moving water of a swimming pool includes a water pump, a variable speed motor, and an arrangement for controlling the variable speed motor. The pumping system further includes an auxiliary device operably connected to the arrangement for control... | 12/21/2010 |
| 7845913 | Flow control A pumping system for moving water of a swimming pool includes a water pump and a variable speed motor. The pumping system further includes means for determining a first motor speed of the motor, means for determining first and second performance values of the pumpin... | 12/07/2010 |
| 7845912 | Driving controlling apparatus for linear compressor and method thereof A driving controlling apparatus for a linear compressor, comprises: a storing unit for storing a reference phase difference to judge an overload state; and a controlling unit for judging an overload state based on a comparison result between the reference phase diff... | 12/07/2010 |
| 7690897 | Controller for a motor and a method of controlling the motor A method of controlling a motor operating a pumping apparatus of a system includes determining a trip value for a parameter, floating the trip value, and monitoring the operation of the pump. Monitoring the operation of the pump includes determining a value for the ... | 04/06/2010 |
| 7665972 | Apparatus and method for controlling operation of reciprocating compressor An apparatus and a method for controlling an operation of a reciprocating compressor which can improve operational efficiency of the reciprocating compressor are provided. The apparatus for controlling the operation of the reciprocating compressor includes a resonan... | 02/23/2010 |
| 7648342 | Compressor protection and diagnostic system A compressor assembly includes a shell, a compressor housed within the shell, and a motor drivingly connected to the compressor. A printed circuit board supports at least one temperature sensor. Processing circuitry receives data from the printed circuit board to de... | 01/19/2010 |
| 7588422 | Pump driving method and device therefor A pump driving apparatus has a characteristic changing section which receives a set pressure, a set flowing amount, a set horse power, and a DC voltage of the converter section as input, outputs modified values of pressure, flowing amount, and horse power, and suppl... | 09/15/2009 |
| 7578658 | Control for integrating compressor-turbine-motor train with power grid A method of controlling a compressor turbine motor train including: receiving a control signal from a plant process controller; receiving a feedback signal indicative of a state of the electrical grid and adjusting an operational parameter of the compressor turbine ... | 08/25/2009 |
| 7520730 | Apparatus and method for controlling operation of compressor An apparatus for controlling an operation of a compressor includes: a back electromotive force calculator for calculating a back electromotive force of a compressor based on a value of a current applied to a motor of the compressor and a value of a voltage applied t... | 04/21/2009 |
| 7437215 | Method and system for improving pump efficiency and productivity under power disturbance conditions A system for controlling operation of a progressing cavity pump to maintain the motor operating under power disturbance conditions. For a blackout condition, a backspin controller uses regenerative power to provide controlled deceleration of the pump, counteracting ... | 10/14/2008 |
| 7435059 | Flow controlled blood pump system A system for pumping blood to assist or assume the cardiac function of a patient is characterized by a blood pump that exhibits a steep performance curve such that only small changes in pump flow occur for large changes in differential pressure across the pump. The ... | 10/14/2008 |
| 7405529 | System and method for controlling linear compressor A system for controlling a linear compressor, generates freezing force as a piston reciprocates according to rotation of a motor which receives alternating current power through a triac. The system includes a controller which moves up or delays a trigger signal corr... | 07/29/2008 |
| 7385368 | Apparatus for controlling operation of reciprocating compressor An apparatus for controlling an operation of a reciprocating compressor includes a inductance increasing device connected to a motor of the reciprocating compressor, so that a surge current generated when power is applied to the reciprocating compressor at an initia... | 06/10/2008 |
| 7373278 | Method of latent fault checking a cooling module A method of latent fault checking a cooling module of an embedded computer chassis may include prior to detection of an active fault in the cooling module, performing a fan controller latent fault checking algorithm and a full-speed latent fault checking algorithm. ... | 05/13/2008 |
| 7352142 | Apparatus and method for controlling stroke of reciprocating compressor An apparatus for controlling an operation of a reciprocating compressor includes a voltage detecting unit for detecting a positive half-wave voltage of an AC voltage applied to a motor of the reciprocating compressor; a current detecting unit for detecting a positiv... | 04/01/2008 |
| 7341432 | Apparatus and method for controlling operation of reciprocating compressor An apparatus and a method for controlling operation of a reciprocating compressor is capable of reducing a stroke estimation error by eliminating an error that occurs due to resistance and inductance of a compressor motor by estimating a stroke with a counter electr... | 03/11/2008 |
| 7342359 | Forward/reverse hybrid switching power supply with time-based pulse triggering control A phase-control power controller that converts a line voltage to an RMS load voltage includes a fixed phase forward/reverse hybrid phase-control clipping circuit that performs phase-control clipping of a load voltage to provide an RMS load voltage. A conduction angl... | 03/11/2008 |
| 7335001 | Apparatus and method for controlling operation of a reciprocating compressor An apparatus and a method for controlling an operation of a reciprocating compressor can improve efficiency of a compressor by reconciling an operation frequency with a mechanical resonant frequency. The apparatus includes a mechanical resonant frequency calculating... | 02/26/2008 |
| 7330779 | Method and system for improving pump efficiency and productivity under power disturbance conditions A system for controlling operation of a progressing cavity pump to maintain the motor operating under power disturbance conditions. For a blackout condition, a backspin controller uses regenerative power to provide controlled deceleration of the pump, counteracting ... | 02/12/2008 |
| 7323845 | Apparatus for controlling operation of compressor and method therefore Provided is an apparatus for controlling an operation of a compressor which can always apply a constant voltage to the compressor without noise and a method therefor. The apparatus for controlling the operation of the compressor includes: a triac electrically connec... | 01/29/2008 |
| 7316542 | Fluid level control system A control system governs fluid level in a well system including a pump positioned downhole for pumping fluid upward through a tubular, a rod positioned within the tubular for driving the pump, a prime mover, and a pumpjack to transmit power from the prime mover to t... | 01/08/2008 |
| 7314350 | Energy store circuit for controlling rotor rotation A fan controller for controlling the rotation of a rotor (with a fan blade) has a current limiting element to control current flow to a capacitive storage apparatus. More specifically, the fan controller has an input for receiving an input voltage, the noted capacit... | 01/01/2008 |
| 7313466 | System and method for automatically detecting a type of a CPU fan An exemplary method for automatically detecting a type of a CPU fan includes: setting a PWM duty cycle of the CPU fan to a value of 100%; obtaining revolutions of the CPU fan at the PWM duty cycle in a fixed time period; calculating an RPM of the CPU fan as a full R... | 12/25/2007 |
| 7305316 | Microcontroller methods of improving reliability in DC brushless motors and cooling fans A method of controlling a motor speed for a fan assembly includes receiving a duty cycle value at a microcontroller. The microcontroller receives a measured fan speed from a speed sensor. An expected fan speed is determined, where the expected fan speed corresponds ... | 12/04/2007 |
| 7292004 | Motor driving apparatus A motor driving apparatus for driving a motor includes a single-phase rectifier circuit having an input connected to a single-phase AC power supply, an inverter circuit that is connected to the single-phase rectifier circuit and applies a current and a voltage to th... | 11/06/2007 |
| 7290990 | Short reverse rotation of compressor at startup In a method of operating a scroll or screw compressor at startup, the compressor is rotated in reverse for a brief period of time. The compressor is of a type that does not compress liquid when rotated in reverse. The purpose is to boil off the liquid refrigerant fr... | 11/06/2007 |
| 7281903 | Device for varying the pressure of the fluid delivered by a jet washer Device for varying the delivery pressure of a jet washer comprising a positive-displacement pump operated by a single-phase electric motor powered by alternating current and having a delivery nozzle of predetermined cross-section, and electronic means for controllin... | 10/16/2007 |
| 7271563 | Apparatus for controlling operation of reciprocating compressor, and method therefor The present invention discloses an apparatus for controlling an operation of a reciprocating compressor and a method therefor which can reduce errors in an operation of a stroke estimated value of the reciprocating compressor, by previously preventing over-saturatio... | 09/18/2007 |
| 7267531 | Current monitoring system and method for metering peristaltic pump A pump system includes a peristaltic pump having a rotor, a motor and a controller. The motor is configured to drive the peristaltic pump so as to deliver a liquid product from a source to a receiving location. The controller monitors a drive current of the motor so... | 09/11/2007 |
| 7263877 | Determination of the piston stroke in a reciprocating piston machine A method for determining the piston stroke of a reciprocating piston machine having a variable stroke, for example a swashplate compressor, a pivoting plate compressor or a pivoting ring compressor, especially for air-conditioning installations in motor vehicles. | 09/04/2007 |
