Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Application No. | Application Title | Issue Date |
| 20120107141 | MOTOR-DRIVEN COMPRESSOR AND CONTROLLER THEREFOR A motor controller for a motor-driven compressor includes a compressing body for compressing and discharging a refrigerant and a motor including a rotary shaft, the motor for driving the compressing body through the rotary shaft. A coil of the motor is arranged in a ref... | 05/03/2012 |
| 20120070313 | SYSTEM AND METHOD FOR POSITION CONTROL OF A MECHANICAL PISTON IN A PUMP Embodiments of the systems and methods disclosed herein utilize a brushless DC motor (BLDCM) to drive a single-stage or a multi-stage pump in a pumping system for real time, smooth motion, and extremely precise and repeatable position control over fluid movements and di... | 03/22/2012 |
| 20120034104 | LINEAR COMPRESSOR The present invention discloses a linear compressor which makes it possible to precisely operate a voltage using a current without having a high-capacity capacitor connected in series to a motor. The linear compressor comprises a mechanical unit including a fixed member... | 02/09/2012 |
| 20120027621 | ELECTRIC MOTOR SYSTEM An electric motor system has a first electric motor, a second electric motor and a control circuit shared by the first motor and the second motor. At least one of the first motor and the second motor is a permanent magnet brushless motor that has a permanent magnet roto... | 02/02/2012 |
| 20110253236 | NOVEL ELECTROMAGNETIC COUPLING JET APPARATUS A massage jet pump may include a motor to rotate a first shaft, a first magnetic pole array may be adapted to be rotated by the first shaft, a second magnetic pole array may be magnetically coupled to the first magnetic pole array and may rotate in accordance with the f... | 10/20/2011 |
| 20110243757 | INVERTER CONTROL DEVICE FOR AC MOTOR AND ELECTRIC COMPRESSOR The present invention has an object to detect a three-phase AC motor current with high accuracy only with DC input current measuring means to a three-phase PWM inverter, and reduce resonance of a DC power supply by a ripple current in driving an AC motor with a DC curre... | 10/06/2011 |
| 20110223038 | CONTROLLER-INTEGRATED MOTOR PUMP A controller-integrated motor pump is disclosed. The motor pump includes: a pump; a motor configured to drive the pump; a control unit configured to control the motor; and a pressure measuring device configured to measure pressure of fluid at a discharge side of the pum... | 09/15/2011 |
| 20110200454 | METHOD IN CONNECTION WITH A PUMP DRIVEN WITH A FREQUENCY CONVERTER AND FREQUENCY CONVERTER An exemplary frequency converter and method are directed to estimating an operation point of a pump when the QH characteristic curve of the pump is known. The frequency converter controls the pump, and a process curve is estimated when a first operation point of the pum... | 08/18/2011 |
| 20110189027 | PUMP POWERED BY A POLYMER TRANSDUCER The invention provides a pump with a transducer comprising a laminate with a film of a dielectric polymer material arranged between first and second layers of an electrically conductive material so that it is deflectable in response to an electrical field applied betwee... | 08/04/2011 |
| 20110160788 | POSITIVE DISPLACEMENT PUMP SYSTEM AND METHOD Systems and methods including a motor or electromagnets to control the movement of one or more pistons in a pumping chamber. The pumping chamber may include a pump inlet and a pump outlet in fluid communication with the pumping chamber. Surfaces on a piston or pumping c... | 06/30/2011 |
| 20110103974 | Control device, oil well with device and method A method of operating an oil well comprises applying through a regenerative variable frequency drive AC electrical energy from a power grid to an AC electric motor to operate a drive mechanism of an oil well pump. The motor speed is regulated in a manner to optimize flu... | 05/05/2011 |
| 20110076157 | CENTRIFUGAL PUMP UNIT The invention relates to a centrifugal pump assembly with an electric drive motor and with a control device having a frequency converter, for the control of the rotational speed of the drive motor, wherein the control device is designed in a manner such that in at least... | 03/31/2011 |
| 20100316503 | PUMP UNIT The invention relates to a pump assembly with a pump (4) and with an electrical drive motor (6), as well as an electronic control device (8), wherein the electronic control device (8) comprises a rotation direction recognition module (14 | 12/16/2010 |
| 20100111710 | Control devices for fuel pump driving motors The present invention includes a control device capable of applying a high voltage to a motor of a fuel pump for an appropriate period of time during a low voltage operation of the motor.... | 05/06/2010 |
| 20100047080 | METHOD OF OPERATING A PUMPING SYSTEM A pumping system for evacuating an enclosure comprises a pumping mechanism (30), a motor (32) for driving the pumping mechanism, and a controller (36) for controlling the motor. The controller sets a maximum value for a rotational frequency of the m... | 02/25/2010 |
| 20090243431 | Piezoelectric element drive device, electronic apparatus, and method for controlling piezoelectric element drive frequency A drive device for a piezoelectric element includes a transformer, a driver circuit, and a control circuit. The transformer has a primary side and a secondary side. The drive circuit causes the secondary side to generate a drive signal whose frequency varies in accordan... | 10/01/2009 |
| 20090226330 | ARTIFICIAL LIFT STRUCTURES This invention demonstrates an improved method of constructing an artificial lift device for deep wells, in which the deadload of the pump mechanism is supported by a continuously-controlled gas spring. The reciprocating motion is produced by a very unusual form of line... | 09/10/2009 |
| 20090136361 | Vacuum turbomolecular pump A vacuum turbomolecular pump (10) is driven by a brushless direct-current drive motor (16) comprising stator coils and a permanent-magnetically excited motor rotor. When rotating, the motor rotor produces an electromotive force oriented counter to the dire... | 05/28/2009 |
| 20090129943 | METHOD FOR DRIVING A BIDIRECTIONAL MOTOR TO ROTATE A FLUID CIRCULATION PUMP A method for starting a motor (14) with a bidirectional rotation direction, to rotate a fluid circulation centrifugal pump (10) having a predetermined optimum hydraulic efficiency depending on the starting rotation direction thereof. The method provides an... | 05/21/2009 |
| 20090107470 | Electronic fuel pump A fuel pump for deployment in a fuel system for an internal combustion engine comprises a 3-phase brushless direct current motor, a sling vane impeller with blade-shaped sling vanes, sensorless electronic motor drive and an electronic controller. The controller is adapt... | 04/30/2009 |
| 20090097988 | AIRFLOW CONTROL FOR VARIABLE SPEED BLOWERS An apparatus for controlling an air distribution system by controlling the speed of a motor associated with a blower to maintain a rate of air flow in the system at substantially a target air flow rate. The apparatus comprises means for controlling a supplied frequency ... | 04/16/2009 |
| 20090087319 | PUMP SYSTEM INCLUDING A VARIABLE FREQUENCY DRIVE CONTROLLER A pump system generally comprising an electrical connector operable to couple with an electric circuit to receive electricity, an electric motor operable to actuate a pump to pump a fluid, and a variable frequency drive (VFD) controller. The VFD controller is operable t... | 04/02/2009 |
| 20080292475 | Driving Controlling Apparatus for Reciprocating Compressor and Method Thereof Driving controlling apparatus and method for a reciprocating compressor capable of stably driving a reciprocating compressor when a reciprocating compressor is operated or an output capacity of the reciprocating compressor is varied, by matching an impedance of the appa... | 11/27/2008 |
| 20080230035 | Fluid pump control apparatus A fuel supply system comprises an engine control unit (ECU), a fuel pump with a built-in pump motor which is PWM controlled based on a control signal from the ECU, a pump controller for controlling supply of electric power to the pump motor, and sensors for detecting an... | 09/25/2008 |
| 20080187443 | Adjustable frequency pump control system An adjustable frequency pump control system (10) that is primarily designed for use in commercial pool filtration systems. The system (10) automatically selects one of three operating speeds that control the speed of a motor that operates a circulation pum... | 08/07/2008 |
| 20080181790 | Pump and pump control circuit apparatus and method A method and apparatus for a pump and a pump control system. The apparatus includes pistons integrally formed in a diaphragm and coupled to the diaphragm by convolutes. The convolutes have a bottom surface angled with respect to a top surface of the pistons. The apparat... | 07/31/2008 |
| 20080181791 | Electric compressor An electric compressor (10) is equipped with a motor chamber (27) provided in a suction pressure region. The motor chamber (27) is adjacent to an inverter accommodation chamber (101) with a first housing (24) therebetween, and a coolin... | 07/31/2008 |
| 20060056980 | 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 to th... | 03/16/2006 |
| 20060056979 | Apparatus and method for controlling operation of compressor An apparatus for controlling a compressor includes a stroke calculator for calculating a stroke estimate value of a compressor based on a value of a current applied to a motor of the compressor and a value of a voltage applied to the motor of the compressor; an operatio... | 03/16/2006 |
| 20060045753 | Apparatus and method for controlling operation of compressor An apparatus for controlling an operation of a compressor includes a controller for generating a control signal for selecting an operation mode of a compressor according to an operation load of the compressor; a first switching unit connected to a motor including a main... | 03/02/2006 |
| 20060018772 | Rotary vacuum pump, structure and method for the balancing thereof A rotary vacuum pump (101; 201) comprising displacement sensors (121A-121F; 221A-221F), variously coupled to the pump basement (103; 203) and arranged close to the pump rotor (113; 213) and/or to the rotating shaft (10... | 01/26/2006 |
| 20050281680 | 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 back... | 12/22/2005 |
| 20050281681 | 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 back... | 12/22/2005 |
| 20050196284 | Electronically controlled vacuum pump A vacuum system comprises, as an integral assembly, a vacuum pump with drive motor, a purge valve, a roughing valve and an electronic control module. A cryogenic vacuum pump and a turbomolecular vacuum pump are disclosed. The control module has a programmed processor fo... | 09/08/2005 |
| 20050158177 | Switch assembly, electric machine having the switch assembly, and method of controlling the same A pump assembly for pumping a liquid and a method of controlling the pump assembly. The pump assembly includes a motor coupled to a pump, and an electronic switch assembly electrically connected to the motor to control the current through the motor. The electronic switc... | 07/21/2005 |
| 20050158178 | Apparatus and method for controlling operation of reciprocating compressor Disclosed are an apparatus and a method for controlling an operation of a reciprocating compressor which can improve operational efficiency of the reciprocating compressor. The apparatus for controlling the operation of the reciprocating compressor includes a resonance ... | 07/21/2005 |
| 20050152788 | Linear compressor and method for controlling the same A linear compressor and a method for controlling the same. The linear compressor automatically short-circuits part of a coil having no power-supply voltage in order to substantially prevent an excessive stroke from being generated when the linear compressor is initially... | 07/14/2005 |
| 20050147502 | Method of driving pump A pump is provided having a pump chamber that is capable of changing a volume thereof by a diaphragm, an inlet passage permitting an operating fluid to flow into the pump chamber; an outlet passage permitting an operating fluid to flow out from the pump chamber; and a ... | 07/07/2005 |
| 20050013698 | Infusion device with disposable elements An infuision device with a disposable administration set which is inexpensive to manufacture. In the preferred embodiment of the present invention the disposable administration set has a plurality of elongated cam followers connected to a plate assembly, wherein the cam... | 01/20/2005 |
