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| Number | Title | Issue Date |
| 7967572 | Hydrogen operated power system One form of a hydrogen operated power system according to this invention is a fuel cell system (20) provided with a supply system which supplies a gaseous fuel from a fuel supply tank (24) to a fuel cell (22), characterized in that a pump (32... | 06/28/2011 |
| 7963748 | Centrifugal air compressor If the ambient temperature of a pressure volute measured by a temperature sensor exceeds 0° C., a compressor is instantly started at normal operation. If the temperature of the pressure volute measured by the temperature sensor is 0° C. or lower, vibration along t... | 06/21/2011 |
| 7905710 | System and method for improved low flow medical pump delivery A medical pump with an improved continuity low flow delivery system and method for use with a pumping chamber, for example in a cassette, is disclosed. The pump includes a pump drive for exerting a force on the pumping chamber and a sensor for sensing the force/pres... | 03/15/2011 |
| 7874808 | Variable speed pumping system and method A variable speed pumping system and an associated method for moving water of an aquatic application. The variable speed pumping system includes a water pump for moving water in connection with performance of an operation upon the water. A variable speed motor is ope... | 01/25/2011 |
| 7762786 | Integrated fire pump controller and automatic transfer switch A unitary fire pump controller and transfer switch assembly is housed in a single cabinet having a fire resistant barrier dividing the cabinet into at least two separate compartments. A fire pump controller device is contained within a first compartment. An automati... | 07/27/2010 |
| 7458781 | Radiation fan driving apparatus A radiation fan driving apparatus aims to allow a non-stop power supply system to output electric power to drive a radiation fan to continuously rotate at a lower speed to perform heat dissipation even the power supply device is electrically connected to an external... | 12/02/2008 |
| 7442014 | Fluid transfer system and method for transferring fluid A fluid transfer systems described herein. The fluid transfer system generally includes a centrifugal multistage pump, a holding tank for holding the fluid operably connected to the pump body via a first conduit, an inlet for receiving the fluid, wherein the fluid i... | 10/28/2008 |
| 7442012 | Speed control for compressors Improvements to a compressor which consists in that, as soon as the measured outlet temperature (TO) reaches a certain hysteresis upper temperature limit (HMAX), the actual rotational speed of the compressor element is either lowered with a speed jump (DS) when the ... | 10/28/2008 |
| 7429842 | Control and alarm system for sump pump A control system for a sump pump driven by an AC motor includes an AC power line having an input adapted for connection to an AC power source and an output adapted for connection to the AC drive motor. A controller is connected to a controllable switch in the AC pow... | 09/30/2008 |
| 7322802 | Thick matter pump comprising a conveyance capacity control system A thick matter pump comprising a drive motor (50), a (reversible) hydraulic pump (6), and two hydraulic cylinders (5, 5′) coupled to conveyor cylinders (7, 7′) for conveying the thick matter. A regulator regulates the rotational speed... | 01/29/2008 |
| 7320225 | Refrigeration system and method of operating the same A refrigeration system including a compressor, condenser, valve, and refrigeration branch, all of which is in fluid communication. The refrigeration branch includes an evaporator coil. The refrigeration system further includes a case adapted to be cooled by the evap... | 01/22/2008 |
| 7321211 | Power variation control system for cyclic loads A method and apparatus for managing power demand of a motor in a cyclic load system having a rotational mass is provided. Flat power draw is achieved through continuous manipulation of the motor torque as a function of feedback velocity while using the rotational ma... | 01/22/2008 |
| 7319965 | Method and apparatus to control the operating speed of a manufacturing facility A method and apparatus for controlling the operating speed of a manufacturing facility is disclosed. It includes determining a desired operating speed that is dependent on at least one economic variable. The variables vary with the operating speed. Also, the operati... | 01/15/2008 |
| 7318353 | Method and apparatus for a product displacement sensing device A displacement sensing device transduces deflection of a body disposed around a conduit into complementary signals indicative of the amount of displacement experienced by the conduit. The displacement sensing device includes a cuff and a sensor disposed on an outer ... | 01/15/2008 |
| 7313964 | Method and apparatus for the detection of high pressure conditions in a vacuum-type electrical device A method for detecting a high pressure condition within a high voltage vacuum device includes detecting the position of a movable structure such as a bellows. The position at high pressures can be detected optically by the interruption of a light beam reflected by a... | 01/01/2008 |
| 7309216 | Pump control and management system A pump control and management system for monitoring and controlling sump pumps as well as providing supplemental controls and alarms. The pump control and management system includes a sump pump, a level sensing assembly, a control assembly, and at least one local se... | 12/18/2007 |
| 7300257 | Prevention of unpowered reverse rotation in compressors The shutdown of a compressor (10) installed in a refrigerant circuit (2) in air conditioning or refrigeration system is controlled so as to prevent unpowered reverse rotation of the compressor. Prior to terminating electric power to the compressor driv... | 11/27/2007 |
| 7296978 | Compressed air system utilizing a motor slip parameter A compressed air system and method of operating the system wherein the slip between the compressor motor and its powering alternator is used as an indication of whether the compressor is running in a loaded or unloaded mode. A slip parameter such as % Slip is determ... | 11/20/2007 |
| 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 |
| 7290989 | 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. In addition, a sensor assembly is provided for monitoring operating parameters of the compressor assembly. Processing circuitry, in commu... | 11/06/2007 |
| 7279801 | Hybrid construction machine having auxiliary battery and control apparatus thereof A hybrid construction machine according to the present invention is constructed to drive electric motors (6, 7, 13, 15, 23, 25) by means of power of a power generator (11) to be driven by an engine (10), power of an auxiliary battery (42)... | 10/09/2007 |
| 7255680 | Positive pressure infusion system having downstream resistance measurement capability A fluid delivery system includes a first fluid container having infusion fluid for a patient. The first fluid container has an outlet and a conduit attached to the outlet. A second fluid container applies pressure to the first fluid container to force fluid out of t... | 08/14/2007 |
| 7244107 | Home oxygen-compression apparatus An oxygen-compression apparatus has a driving device, multiple rotating wheels, multiple driving rings, multiple rocking cylinders and multiple connecting hoses. The driving device has a driving shaft with a central axis. The rotating wheels are eccentrically attach... | 07/17/2007 |
| 7237128 | Method and apparatus to dynamically change an operating frequency and operating voltage of an electronic device In one embodiment, there is provided a method comprising determining a target operating point for an electronic device, the target operating point including a target operating frequency and a target operating voltage; and dynamically changing a current operating poi... | 06/26/2007 |
| 7232430 | Air-in-line and pressure detection Methods and apparatus for air content and pressure measurement of sample fluid, especially sample fluid in association with an infusion pump. Volume change in a chamber as the chamber transitions between negative and positive pressure relates to the air content in t... | 06/19/2007 |
| 7229474 | Method for controlling the position of a permanent magnetically supported rotating component Since disruptive forces can be continuously exerted upon a rotor during a pulsatile flow through a pump with a magnetically mounted rotor (permanent magnets and addition control current coils), it is necessary to adjust position i.e. modify axial rotor position very... | 06/12/2007 |
| 7225676 | Method and apparatus for the detection of high pressure conditions in a vacuum switching device A method for detecting a high pressure condition within an interrupter includes measuring the intensity of light emitted from an arc created by contacts within the interrupter, comparing the measured intensity with a predetermined value, and providing an indication ... | 06/05/2007 |
| 7222493 | Compressor diagnostic system A system and method for diagnosing and protecting a compressor includes a sensor, logic circuitry, a motor protector and an intelligent device. The logic circuitry is associated with the sensor and the motor protector and operable to determine a trip frequency of th... | 05/29/2007 |
| 7219723 | Integrated control system for beam pump systems The present invention generally provides apparatus and methods of operating a pumping system. The pump control apparatus includes a first sensor for measuring strain on a structure of the well pumping system and a second sensor for measuring a position of the struct... | 05/22/2007 |
| 7217360 | Multi column chromatography system The present invention relates to a method and apparatus for chromatographically analyzing each of a plurality of samples in detector, comprising an autosampler to contain a plurality of samples for chromatographic analysis and a plurality of chromatographic systems,... | 05/15/2007 |
| 7206715 | Empty container detection using container side pressure sensing A system and method for monitoring changes in the pressure of a fluid line upstream of an infusion pump to determine when a fluid container has emptied, and to provide a signal indicating that the container needs replacement or replenishment. The difference between ... | 04/17/2007 |
| 7179046 | Fan array fan section in air-handling systems A fan array fan section in an air-handling system includes a plurality of fan units arranged in a fan array and positioned within an air-handling compartment. One preferred embodiment may include an array controller programmed to operate the plurality of fan units a... | 02/20/2007 |
| 7161316 | Method and apparatus for discrete speed compensated torque step motor control Methods and apparatus for controlling a motor are provided. The motor may be operated in a fluid system having a variable static pressure acting on the motor. The method including operating the motor at a first substantially constant torque level, varying the static... | 01/09/2007 |
| 7160242 | Blood pump system A blood pump system includes a housing having an inlet port and an outlet port, a rotor rotated in the housing for pumping blood, and a motor for rotating the rotor. The blood pump system includes a motor current measuring function, and a backflow detecting function... | 01/09/2007 |
| 7138051 | Chromatography system, method and software for the separation of biomolecules The present invention relates to methods, systems and software for optimising the separation of a sample of biomolecules eluted from a chromatography column in which the concentration of a second component added to an elution buffer is varied in order to form an elu... | 11/21/2006 |
| 7118347 | Method for activating an electric motor and a metering pump by supplying predetermined pulse intervals to supply predetermined fluid quantities The methods serves for activating an electric motor of a metering pump with which the fluid quantity (Vnom) to be delivered is set by an external impulse trigger, wherein a predetermined delivery quantity (Vnom) is allocated to each impulse (t)... | 10/10/2006 |
| 7109680 | Inverter device An object is to provide an inverter device capable of realizing exact protection of the winding of a motor. An inverter device for generating a pseudo alternating current by switching a direct current to drive a motor, comprises a controller that executes vector con... | 09/19/2006 |
| 7095188 | Serial fan set and rotation speed-matching curve generation method thereof A serial fan set and rotation speed-matching curve generation method thereof are provided. The serial fan set comprises a rotation speed control module, a first fan and a second fan, in which the rotation speed control module is used to receive the power signal and ... | 08/22/2006 |
| 7083391 | Method and device for detecting the speed of a pump A method and a system for detecting the speed of a pump motor of a hydraulic pump system are provided, in which pump system a pump is driven by a pump motor to deliver hydraulic fluid into a pump reservoir. In accordance with the present invention, a pressure signal... | 08/01/2006 |
| 7080792 | Liquid pressurizing device A liquid pressuring device comprises a reciprocating pump (1), pressure sensor (23) and pressure control unit (25) which is adapted to control the motion of the plungers (5A, 5B) so as to make an actual delivery pressure value reac... | 07/25/2006 |
