Class / Patent application number | Description | Number of patent applications / Date published |
417002000 | Plural pumps having separate drive motors, supply sources, or delivery destinations | 49 |
20080247879 | Cooling Fan Module for a Motor Vehicle - A cooling fan module for a motor vehicle has a first fan motor which is used to drive a first cooling fan and a second fan motor which is used to drive a second cooling fan. A control unit ( | 10-09-2008 |
20080273989 | MULTI-STAGE GAS COMPRESSING APPARATUS - A multi-stage gas compressing apparatus comprises a primary gas compressor and a secondary gas compressor. A gas compressed in the primary gas compressor is transferred to the secondary gas compressor in which the gas is further compressed. A detector detects upper and lower limits of discharge pressure from the secondary gas compressor, and a signal is sent from the detector to a control device connected to the primary and secondary gas compressors. Then, the primary and secondary gas compressors are started or stopped by the control device. | 11-06-2008 |
20090004024 | MULTI-CHANNEL CONTROLLER - One aspect of the present invention provides a multi-channel controller that can control a plurality of fuel pump devices, with each fuel pump device having its own dedicated communications channel. Accordingly, aspects of the present invention enable existing wiring and fuel pump devices to be preserved while turning an existing fuel pump device installation into a network of may point-to-point networks. | 01-01-2009 |
20090169396 | COMPRESSED AIR MANUFACTURING FACILITY - In order to provide a compressed air manufacturing facility which can increase a stability of a supply pressure while obtaining an energy saving effect, in a compressed air manufacturing facility provided with a compressor compressing an air, an electric motor driving the compressor, and an inverter variably controlling a rotating speed of the electric motor, the compressed air manufacturing facility is provided with a pressure sensor detecting a discharge pressure of the compressor at an upstream side position of a discharge air system connected to a discharge side of the compressor, and a control apparatus computing a pressure loss of the discharge air system in correspondence to a rotating speed of the electric motor, and changing a control range of the discharge pressure of the compressor at the upstream side position of the discharge air system on the basis of the computation in such a manner that a terminal pressure at a downstream side position of the discharge air system comes to a predetermined range, and variably controlling the rotating speed of the electric motor via the inverter in such a manner that the discharge pressure of the compressor detected by the pressure sensor comes to the changed control range. | 07-02-2009 |
20090257886 | Method And Apparatus For Controlling Microfluidic Flow - An apparatus includes a pump; a gas pressure sensor; a microfluidic chip defining a microfluidic conduit; and a gas conduit providing fluid communication between the pump, the gas sensor and the microfluidic conduit; and a controller coupled to the pump and the gas pressure sensor, whereby the controller controls the pump, thereby controlling the gas pressure at the microfluidic conduit. | 10-15-2009 |
20090304521 | SYNCHRONOUS TORQUE BALANCE IN MULTIPLE PUMP SYSTEMS - The present invention provides a new and unique method and apparatus for operating and running multiple pumps in a system together at a substantially synchronous torque to achieve a desired setpoint. Each of the multiple pumps may be operated with a variable speed drive. The present invention may also take the form of the system having the multiple pumps with a system controller for operating and running the multiple pumps, a pump for operating and running in such a system, a system control module for such a system controller, as well as a pump control module for running and operating such a pump. | 12-10-2009 |
20100014987 | Control Device for a Power Unit - The present invention refers to a control equipment for a pressure set, said pressure set being made up of a main pump and at least one auxiliary pump, characterised in that it comprises a housing fitted to the exit of the main pump, therewithin it is provided with: a pressure transducer; a minimum flow detector associated to the circulation pipe that is related to the main pump; a frequency changer to regulate the flow speed that is flowing through the hydraulic pipe that is connected to the main pump; and an electronic control circuit electrically connected to the pressure transducer, the flow detector, so that based on the signals received from them it sends a signal to the frequency changer so as to regulate the working parameters of the main pump and at least one auxiliary pump, keeping the pressure value unchanged throughout the workings of the pressure set. | 01-21-2010 |
20100028164 | FAN FILTER UNIT - A fan filter unit includes a plurality of fan motors, a plurality of detectors, a total controller, and a filter. Each of the fan motors includes a fan and a motor. The total controller performs a feedback control to the respective fan motors so that the detected rotating speeds are identical with a set rotating speed, based on rotating speeds detected by the detectors. When one detected rotating speed value by any of the detectors is smaller than the other detected rotating speed value by the other detector, the total controller performs a tuning control of rotating speed so that a rotating speed of the other fan motor is adjusted to the slower rotating speed of the fan motor. | 02-04-2010 |
20100178174 | COMPRESSOR SYSTEM - A compressor system includes a lead compressor operable to produce a flow of compressed fluid at a first output and a lag compressor operable to produce a flow of compressed fluid at a second output. The sum of the first output and the second output defines a system output. A lead variable speed motor is operable to drive the lead compressor at a first compressor speed to vary the first output and a lag variable speed motor is operable to drive the lag compressor at a second compressor speed to vary the second output. A sensor is operable to measure a system load, and a lead motor drive is operable to control the speed of the lead variable speed motor and to set a desired operating state of the lag variable speed motor in response to a comparison of the system load and the system output. | 07-15-2010 |
20100232980 | Air Compressor - An air compressor | 09-16-2010 |
20100296945 | FAN CONTROL APPARATUS AND FAN CONTROL METHOD - A fan controlling apparatus for controlling a plurality of fans which are tandemly arranged in ventilation direction of a chamber to control a temperature of a hot generating object placed in the chamber, the apparatus includes a memory for storing data of the rotational speed each of fans in relation to the temperature of the heat generating object, and a controller for controlling the rotational speed of each of the fans respectively in dependence on the temperature of the heat generating object in reference to the data stored in the memory. | 11-25-2010 |
20110305585 | LUBRICANT SYSTEM - There is proposed a lubricant system having a plurality of motor-driven pumps operating in parallel as main oil pumps, wherein even if at least one of the main oil pumps stops, the other normally operating main oil pumps do not stop due to overload of a motor. A lubricant system | 12-15-2011 |
20120128506 | MULTICHAMBER AND MOTOR PUMPS WITH SEVERAL CHAMBERS PER MOTOR PUMP - The mechanism subject of the invention is basically a modification of the “Multichamber and motor pumps for generating ultra high pressure” where more efficiency is acquired in the space and in its operation upon having several chambers for each motor pump which is installed, mainly the ones located towards the exterior. Or each chamber permits in the inside of its walls the injection of liquid at intermediate pressures between the pressure the chamber has in its interior and its exterior. | 05-24-2012 |
20120263605 | COMPRESSION METHOD AND AIR SEPARATION - A compression method, a multistage compression system and an air separation method and plant in which a gas is compressed in a series of compression stages to produce a compressed gas and each of the compression stages incorporate a variable speed compressor. In such compression method and system, the compressed air is produced at a pressure that remains stable during both normal operational conditions and during turn down conditions during which the flow rate of the gas is reduced. This reduction is accomplished by reducing the speed of the compressor in an initial compression stage such that the compressor operates at a point along its peak efficiency operating line at which the pressure ratio is directly proportional to the flow rate and such that the lower turn down flow rate is obtained at a reduced pressure which is made up in successive compression stages. | 10-18-2012 |
20120288375 | FAN CONTROL SYSTEM - A fan control system includes first and second fan control units. Each fan control unit includes a connector, a delay circuit, a switch unit, and a control circuit. Each connector is connected to a corresponding fan interface to receive a voltage signal. The delay circuit of the first fan control unit delays the voltage signal for a first period of time, and turns on the corresponding switch unit after the first period of time. The delay circuit of the second fan control unit delays the voltage signal for a second period of time, and turns on the corresponding switch unit after the second period of time. Each control circuit receives the corresponding delayed voltage signal, to start the corresponding fan. The first period of time is unequal to the second period of time. | 11-15-2012 |
20130156604 | HYDRAULIC PRESSURE PRODUCING SYSTEM FOR AUTOMATIC TRANSMISSION AND CONTROL METHOD THEREOF - A hydraulic pressure producing system for an automatic transmission, and a control method thereof may include a first hydraulic pump adapted to generate hydraulic pressure for shifting, a second hydraulic pump adapted to additionally generate hydraulic pressure when hydraulic pressure supplied from the first hydraulic pump is insufficient, an accumulator adapted to store hydraulic pressure excessively generated from the first hydraulic pump, and a control unit controlling the second hydraulic pump. The method may include operating the first hydraulic pump in a state of idle stop, predicting a finish point of the idle stop state, starting operation of the second hydraulic pump prior to a predetermined time from the predicted finish point, operating the second hydraulic pump with a predetermined maximum rotation speed, and operating the second hydraulic pump with a target rotation speed. | 06-20-2013 |
20130189118 | TORQUE ALLOCATING SYSTEM FOR A VARIABLE DISPLACEMENT HYDRAULIC SYSTEM - Disclosed is a system for allocating torque, supplied in one embodiment by an engine, to multiple variable and fixed displacement pumps coupled together in a series by coupling elements interspersed between the pumps. A controller is included which monitors the torque applied to each coupling element. The controller automatically varies displacement in one or more of the variable displacement pumps to prioritize and allocate torque to optimize available torque while keeping the torque applied to each coupling element within the torque limit for that particular coupling element. | 07-25-2013 |
20130216397 | MODULAR FAN HOUSING WITH MULTIPLE MODULAR UNITS HAVING SOUND ATTENUATION FOR A FAN ARRAY FOR AN AIR-HANDLING SYSTEM - A modular fan housing configured to hold an array of motors and fans is provided. The modular fan housing is configured for use in an air-handling system that delivers air to a ventilation system for at least a portion of a building. The fan housing comprises a plurality of modular units configured to be stacked adjacent to one another in at least one row or column to form an array. The modular units each include an interior surface and have a front end and a back end that define a chamber. The chambers are configured to receive the motors and fans. Sound attenuation layers extend along at least a portion of the interior surface of the corresponding chambers. The sound attenuation layers are positioned between at least some of the adjacent chambers. | 08-22-2013 |
20130230409 | ENVIRONMENTAL CONTROL SYSTEM HAVING PARALLEL COMPRESSORS AND METHOD OF CONTROLLABLY OPERATING - An environmental control system having parallel compressors includes a first compressor driven by a first motor, the first compressor being operable for fluidly directing a first flow at a first flow rate through the first compressor. Also included is a second compressor driven by a second motor, the second compressor being operable for fluidly directing a second flow at a second flow rate through the second compressor. Further included is a monitoring component configured to compare the first flow rate to the second flow rate. | 09-05-2013 |
20130287592 | COMPRESSED GAS SUPPLY UNIT - A compressed gas supply unit has scroll compressors. Gas discharged from the scroll compressors travels through a main supply passage and is reserved in a reservoir tank, after which the gas is supplied to a gas recipient from a supply passage. The scroll compressors include inverter devices that allow for independent modulation of the speeds of respective drive motors. The controller includes a speed range setting unit that sets an upper speed limit and a lower speed limit of the scroll compressors, a speed sum calculating unit that calculates a sum of speeds of the scroll compressors based on a load of the compressed gas supply unit, and a speed setting unit that allocates the calculated sum of speeds among the scroll compressors to set speeds for scroll compressors respectively. | 10-31-2013 |
20130287593 | TRANSMISSION FLUID EXCHANGE MACHINE - A machine for replacing used transmission fluid in a vehicle with new transmission fluid includes a frame having a housing. The machine includes a pair of service hoses that extend from the machine and connect to the vehicle's transmission fluid system for placing the machine in the fluid flow. A new fluid tank and a used fluid tank are provided. A pump and a manifold are associated with each of the tanks. The pumps provide for the selective withdraw or insertion of fluid into or out of the tanks. A display on the housing presents an operator of the machine with various tasks or options the machine can perform. A processor controls activation of the pumps and other electrical components based on inputs received by the display. Scales are provided under each tank for determining the amount of fluid going into and out of the tanks during the exchange process. | 10-31-2013 |
20130287594 | FLUID SUPPLY DEVICE - A fuel supply device according to the present invention comprises a first fuel pump for forcing fuel from a fuel tank to a fuel passage, a first electric motor for driving the first fuel pump, a second fuel pump for forcing fuel from the fuel tank to the fuel passage, a second electric motor for driving the second fuel pump, a supply flow rate sensor for detecting flow rate in the supply passage, and a control device for controlling the flow rate in the supply passage to follow a desired value thereof, by regulating rotational speeds of the first and second electric motors depending on a difference between the desired value and a detected value of flow rate in the supply passage. | 10-31-2013 |
20130336802 | CASE FLOW AUGMENTING ARRANGEMENT FOR COOLING VARIABLE SPEED ELECTRIC MOTOR-PUMPS - Example fluid circuits (e.g., within aircrafts) include first and second pump assemblies. The first pump assembly has an electric motor and a first fluid pump. The first fluid pump is coupled to the electric motor and has a case drain port that is in fluid communication with a case drain region of the first fluid pump. The second pump assembly is powered by hydraulic pressure from the first fluid outlet of the first fluid pump and functions to augment flow through the case drain region of the first fluid pump. | 12-19-2013 |
20140037462 | Dynamic Compensation of Airflow in Electronics Enclosures with Failed Fans - An approach is provided in which a cooling manager detects a failed fan included in an electronic enclosure. The electronic enclosure includes multiple fans that each cool different component areas in the electronic enclosure. The cooling manager selects an airflow compensator that corresponds to a functioning fan included in the electronic enclosure, which includes a fixed perforated member and a movable perforated member. In turn, the cooling manager adjusts the selected airflow compensator to redirect a portion of airflow generated by the functioning fan to the component area corresponding to the failed fan. | 02-06-2014 |
20140119946 | Battery Backup Sump Pump Systems and Methods - Embodiments of the invention provide battery backup sump pump (BBU) systems and methods. The BBU systems and methods can be used with a battery and an alternating current power source to charge the battery. The BBU systems and methods can be adapted to be a portable power source for AC and DC external devices. | 05-01-2014 |
20140161627 | SYSTEM AND METHOD FOR CONTROLLING MOTION PROFILE OF PISTONS - A method includes driving a fluid pumping unit having a plurality of pumping cylinders via a plurality of hydraulic cylinders respectively of a hydraulic power unit. The method further includes controlling activation of the hydraulic power unit such that each stroke of the corresponding piston assembly between the top dead center and the bottom dead center follows a corresponding trapezoidal velocity profile with respect to a time duration. Controlling activation includes controlling flow of a hydraulic fluid in the hydraulic power unit so as to control the corresponding trapezoidal velocity profile with respect to the time duration of the corresponding piston assembly to obtain a predefined flow rate of the fluid medium from the pumping unit. | 06-12-2014 |
20140178208 | SYSTEM FOR GATHERING GAS FROM A GAS FIELD COMPRISING A HIGH EFFICIENT HIGH PRESSURE COMPRESSOR - A system includes a high pressure compressor having a gas input and a gas output. The gas input is coupleable to a gas field for receiving a gathered gas with a first gas pressure, and the gas output is coupleable to a gas export system for providing the gas with a second gas pressure, which is higher than the first gas pressure, to the gas export system. The system also includes a measuring unit coupled to the gas input. The measuring unit measures an input mass flow value indicative of an input mass flow at the gas input. The system also includes a mass flow control unit that is coupled to the measuring unit for receiving the measured input mass flow value and the gas input for controlling the input mass flow such that the measured input mass flow value corresponds to a set point input mass flow value. | 06-26-2014 |
20140294599 | PUMP MOTOR CONTROL SYSTEM FOR AUTOMATIC TRANSMISSION AND METHOD THEREOF - A pump motor control system provides for a low-pressure hydraulic pump and a high-pressure hydraulic pump on one shaft of a pump motor. A method includes detecting information including engine speed, a shift range selected, a rotation speed of the pump motor, and hydraulic pressure in a high-pressure part, controlling the rotation speed of the pump motor to be the same as the engine speed, when engine is turned on and the P range or the N range is selected by the shift lever, generating hydraulic pressure for operating a friction element in the high-pressure part by increasing the rotation speed of the pump motor, when the shift lever is moved to the D range or R range, and keeping the hydraulic pressure in the high-pressure part stable, by controlling the rotation speed of the pump motor in accordance with the hydraulic pressure at the high-pressure part. | 10-02-2014 |
20150104328 | SUBSEA PUMPING APPARATUSES AND RELATED METHODS - This disclosure includes subsea pumping apparatuses and related methods. Some apparatuses include one or more subsea pumps, each having an inlet and an outlet, and one or more motors, each configured to actuate at least one pump to communicate a hydraulic fluid from the inlet to the outlet, where the subsea pumping apparatus is configured to be in fluid communication with a hydraulically actuated device of a blowout preventer. Some subsea pumping apparatuses include one or more of: a desalination system configured to produce at least a portion of the hydraulic fluid; one or more valves, each configured to selectively route hydraulic fluid from an outlet of a pump to, for example, a subsea environment, a reservoir, and/or the inlet of the pump; and a reservoir configured to store at least a portion of the hydraulic fluid. Some apparatuses are configured to be directly coupled to the hydraulically actuated device. | 04-16-2015 |
20150118065 | PUMP UNIT - According to one embodiment, a pump unit provided for piping which feeds a liquid at a preset unit flow rate includes (n+1) pumps and a constant flow valve. The (n+1) pumps are arranged in series and set to pressurize the liquid so as to achieve the unit flow rate when n pumps are arranged in series. The constant flow valve is installed downstream of the (n+1) pumps. The constant flow valve feeds the fluid at the unit flow rate by giving first resistance to the fluid when the fluid is pressurized by n pumps of the (n+1) pumps. The constant flow valve feeds the fluid at the unit flow rate by giving second resistance larger than the first resistance to the fluid when the fluid is pressurized by the (n+1) pumps. | 04-30-2015 |
20150308435 | SIDE-BY-SIDE DUAL PUMP AND MOTOR WITH CONTROL DEVICE - The present pump devices provide a dual pump using two (or more) electric motors (e.g. brushless DC motors) driving the pumps independently, including integration of hydraulic and electrical components and connectors. The illustrated arrangements include an in-line single shaft version, a parallel side-by-side separate shaft version, and an inside-outside version. Each configuration includes a housing supporting formation of: shared structural support for the pumps and motors (e.g., bearings, stator, relationship of components), fluid pump and hydraulic system (e.g., fluid passageways, ports connectors) and motor electrical control (e.g., control circuitry and sensory components). | 10-29-2015 |
20190145391 | DOUBLE ACTING POSITIVE DISPLACEMENT FLUID PUMP | 05-16-2019 |
417003000 | Pumps in parallel flow paths with common inflow or outflow | 17 |
20090074590 | Vehicle control apparatus - A vehicle control apparatus includes an input member; a driving force transmission mechanism that transmits a rotational driving force of the input member to an output member; a mechanical pump that operates by using the rotational driving force of the input member; an electric pump that operates when a rotational speed of the mechanical pump is less than a predetermined operation threshold; an oil pressure control apparatus that performs control operations for the driving force transmission mechanism by supplying operating oil, which is supplied from the mechanical pump and the electric pump, to the driving force transmission mechanism; and a controller that detects a state of the electric pump. | 03-19-2009 |
20110014061 | FAN ARRAY CONTROL SYSTEM - 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 at peak efficiency by computing the power consumed in various configurations and selecting the configuration requiring minimum power to operate. | 01-20-2011 |
20130108473 | METHOD AND CONTROLLER FOR OPERATING A PUMP SYSTEM | 05-02-2013 |
20130216398 | HIGH-EFFICIENCY PUMP SYSTEMS - According to one embodiment of the present invention, a system for pumping fluid is provided. According to this embodiment, a fluid pumping system comprises a fluid inlet pipe and a fluid outlet pipe. A plurality of pump units are disposed between the inlet and outlet pipes such that the pump units each pump fluid out of the inlet pipe and into the outlet pipe. The pump units each include at least one DC motor. A solar panel may be used to power the pump units. | 08-22-2013 |
20140133998 | CONTROLLING OF MULTIPLE PUMPS - An apparatus for controlling vacuum pressure is provided. The apparatus includes a multiple axis controller, such as a dual axis footpedal, and a processing apparatus, such as an instrument host running software, configured to receive multiple axis data from the multiple axis controller. The apparatus also includes a first pump configured to provide nonzero fluid pressure at a first nonzero fluid pressure level based on a first axis state of the multiple axis controller and a second pump configured to provide nonzero fluid pressure at a second nonzero fluid pressure level based on a second axis state of the multiple axis controller. The processing apparatus causes switching between the first pump and the second pump based on the first axis state and the second axis state of the multiple axis controller. | 05-15-2014 |
20140356189 | VACUUM DEVICE FOR PLANTS FOR THE PROCESSING OF CONTAINERS, AND METHOD FOR CONTROLLING A VACUUM DEVICE - An apparatus for generating negative pressure in an installation for filling containers with liquid bulk product includes a vacuum device, and a control-and-regulating unit. The vacuum device has a controllable suction power, and has a plural electrically-powered vacuum pumps. These are configured to operate in parallel. The control-and-regulating unit is configured to control the number of vacuum pumps that are active, thereby controlling the suction power. | 12-04-2014 |
20150308304 | VARIABLE FLUID FLOW TECHNIQUES FOR MACHINE FLUID SYSTEMS - Methods, systems, and techniques for structuring, operating, and/or controlling a variable fluid flow system of a machine are provided. In various embodiments, an electric motor can be leveraged in combination with the existing components of a machine, such as the supplemental fluid pump of the machine. | 10-29-2015 |
417004000 | Having means sensing condition in common inflow or outflow line | 10 |
417005000 | With control of plural pump drive motors | 10 |
20090304522 | Installation for high pressure compression with several stages - The invention concerns an installation for high pressure compression with several stages, normally used for producing PET bottles. The inventive installation comprises a main pipe ( | 12-10-2009 |
20110129355 | Method for Controlling the Vacuum Generator(s) in a Vacuum Sewage System - Method for controlling one or more vacuum generators ( | 06-02-2011 |
20120141297 | OIL PUMP CONTROLLING SYSTEM OF HYBRID VEHICLE AND METHOD THEREOF - The present invention relates to an oil pump control apparatus of a hybrid vehicle that controls an oil pump according to a demand of an output torque and oil temperature, and a method thereof. A oil pump control method includes controlling hydraulic line pressure by operating a oil pump at a maximum power if a starting demand for a hybrid vehicle is detected, calculating a viscosity to correspond to an oil temperature in an engine stop mode and controlling a rotation speed of the oil pump at a low power, and calculating a viscosity according to a variation of a line pressure in a driving mode and controlling the rotation speed of the electric oil pump in either a low power, a middle power, and a high power state. | 06-07-2012 |
20130294928 | DUAL PUMP AND MOTOR WITH CONTROL DEVICE - The present pump devices provide a dual pump using two (or more) electric motors (e.g. brushless DC motors) driving the pumps independently, including integration of hydraulic and electrical components and connectors. The illustrated arrangements include an in-line single shaft version, a parallel separate shaft version, and an inside-outside version. Each configuration includes a housing supporting formation of: shared structural support for the pumps and motors (e.g., bearings, stator, relationship of components), fluid pump and hydraulic system (e.g., fluid passageways, ports connectors) and motor electrical control (e.g., control circuitry and sensory components). | 11-07-2013 |
20150017019 | MOBILE HYDRAULIC GENERATOR AND CONTROL METHOD THEREOF - Disclosed are a mobile hydraulic generator having rapid response by scattering a small motor for generating a flow of fluid and a small pump, and a control method thereof. The mobile hydraulic generator includes: a flow generator including n pumps operated by n motors to generate an amount of a hydraulic fluid; a proportional hydraulic control valve to control output hydraulic pressure according to the amount of the hydraulic fluid; a pressure sensor to detect the output hydraulic pressure; and a hydraulic servo loop controller to which required hydraulic pressure and required amount of fluid are input by a user, to which feedback the output hydraulic pressure, to generate a pressure control signal for controlling the proportional hydraulic control valve based on the required hydraulic pressure and a change amount of the output hydraulic pressure and to generate an RPM input signal for controlling RPM of the n motors. | 01-15-2015 |
417006000 | With additional means sensing condition of one pump or path | 5 |
20090208345 | SUMP PUMP WITH EMERGENCY BACKUP SYSTEM - A flood control system for use in a structure having a basement floor below ground level is provided. The flood control system comprises a sump, a main pump positioned in the sump, and a secondary pump positioned in the sum. The secondary pump is raised relative to the main pump to a predetermined elevation. The main pump is energized when a height of water within the sump is at a first level. The secondary pump is energized when a height of water within the sump reaches a second, higher level and is de-energized when a height of water within the sump drops to a third level. A cover is releasably mounted to the sump. The cover includes a first section for covering the main pump and a separate second section for covering the secondary pump. At least one of the first and second sections is hingedly mounted to the sump. A controller is operatively connected to the main pump and the secondary pump. The controller is responsive to water level within the sump to selectively energize at least one of the main pump and the secondary pump. | 08-20-2009 |
20100266421 | Pump system - The invention provides a pumping system for delivering a plurality of different materials serially at a location at substantially the same flow rate wherein the system has a plurality of diaphragm pumps wherein each diaphragm pump has a first chamber for receiving a hydraulic fluid from a first and/or second hydraulic fluid source and a second chamber for receiving a material to be pumped from one of a plurality of pumpable material sources and wherein the system has a sensor for detecting the pressure of the hydraulic fluid in each of the first chambers of the plurality of diaphragm pumps which sensor is operable connected to a source of hydraulic fluid such that the sensor can activate the source of hydraulic fluid to ensure that the hydraulic fluid in each of the first chambers of the plurality of diaphragm pumps has an equivalent pressure at a time when delivery from one of the diaphragm pumps ceases and delivery from another commences; and a method of delivering a plurality of different materials at a location at substantially the same flow rate. | 10-21-2010 |
20120183413 | Reactor Feedwater Pump Control System - An object of the present invention is to provide a reactor feedwater pump control system, wherein when a condensate pump is tripped, the decrease in feedwater flow of feedwater supplied to a steam generator is minimized to suppress the decrease in water level of the steam generator, and at the same time preventing operating condensate pumps from continuing a run out operation. The feedwater pump control system is provided with a feedwater supply system, which includes a plurality of condensate pumps disposed in parallel for boosting condensate water from a condenser; a plurality of reactor feedwater pumps disposed in parallel for further boosting and supplying the condensate water to a steam generator; and variable frequency power supply systems each for driving an electric motor of the reactor feedwater pump at an adjustable speed. | 07-19-2012 |
20130171006 | COOLING SYSTEM AND CONTROL METHOD - A cooling system includes a fan group with a number of fans arranged in a row, a rail extending in a direction parallel to the row of the fans. A backup fan slidably mounted to the rail, a motor configured to control the movement of the backup fan, and a control board to determine whether there exists one malfunction fan in the fan group. When one abnormal fan exists in the fan group, the control board outputs a control signal to the motor, to enable the motor to drive the backup fan to move to a location corresponding to the abnormal fan. | 07-04-2013 |
20160076531 | FLUID SUPPLY DEVICE - An engine cooling device includes a first supply pump driven by an engine, a second supply pump driven by an electric motor, a first fluid path switching valve, a temperature detector, a revolution speed detector that detects the revolution speed of the engine, and a controller that controls the actuation of the electric motor and the fluid path switching valve. When the temperature of the engine detected by the temperature detector (engine cooling water temperature) is less than a first predetermined temperature, the controller performs control to restrict the supply of the cooling fluid from the first supply pump to the engine by switching the fluid path switching valve to a restricted state, and to supply the cooling fluid from the second supply pump to the engine by performing control to drive the electric motor. | 03-17-2016 |