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8182680 |
Primary piston correction during transfer
A method for controlling operation of a pump unit, where the pump unit includes a primary piston pump having a primary piston and a secondary piston pump having a secondary piston. The primary...
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8180593 |
Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore
A method and apparatus for determining a fluid level and/or output flow during operation of a centrifugal pump, are provided, which may be used for production of gas and/or oil from a well, and...
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8162620 |
Method for control of a pressurised air supply system for a motor vehicle
A method for control of a pressurized air supply system for a motor vehicle. In a supply condition, the air compressor is driven by the drive motor and connected to a compressed air system of the...
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8135529 |
Method for controlling constant-pressure fluid
A method for controlling a constant-pressure fluid enables an inverter with a build-in controller to control rotation speed of a pump to achieve constant-pressure control thereof. In the control...
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8127563 |
Linear-compressor control system, a method of controlling a linear compressor and a linear compressor
A linear compressor control system includes an electronic circuit controlling an electric motor that drive a piston of the compressor, such that the motor is operated intermittently with an on-time...
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8123490 |
Apparatus and method for controlling electric compressor
There is provided an apparatus for controlling an electric compressor, which can actuate the electric compressor rapidly through a simpler and lower-cost configuration while achieving reduction in...
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8113789 |
System and method of disabling an HVAC compressor based on a high pressure cut out
A system and method is provided for monitoring a system pressure to infer whether a high pressure cut out (HPCO) switch has opened disabling a heating, ventilating, and air conditioning (HVAC)...
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8070458 |
Pump apparatus and method
Pump apparatus and method. The pump can include a valve assembly and a diaphragm. In some embodiments, the diaphragm can include a convolute that can deform in order to increase a volume of a...
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8062007 |
Fluid transporting device using conductive polymer
A fluid transporting device is provided with a pump chamber that has a pump function for sucking and discharging a fluid, and is filled therein with the fluid, a casing unit which forms one portion...
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8051653 |
Velocity-pressure control apparatus of hydraulic machine
A velocity-pressure control apparatus of a hydraulic machine includes a pressure command generator, a pressure sensor, a pressure controller, a velocity command generator, a velocity limiter, a...
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8042612 |
Method and device for maintaining sub-cooled fluid to ESP system
A method of operating an electrical submersible pumping system that includes realtime monitoring of the wellbore fluid and adjusting pump speed so the fluid entering the pump remains subcooled. The...
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8037702 |
Multistage compressor
To provide a multistage compressor including an injection circuit, which can continue high-efficiency and high-capacity operations even if the injection circuit is turned on/off in accordance with...
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8033797 |
Pump with automatic deactivation mechanism
An automatic deactivation mechanism is configured for an air bladder pump having a casing and a motor located therein to pump air into an air bladder from the atmosphere and through an air valve...
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8025555 |
System for measuring and controlling the level of vacuum applied to a conditioning holder within a CMP system
A method and apparatus for conditioning polishing pads that utilizes an apertured conditioning disk for introducing operation-specific slurries, without the need for additional tooling, platens,...
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8011895 |
No water / dead head detection pump protection algorithm
A method and apparatus are provided for controlling the operation of a pump in a pumping system, featuring sensing a no water or dead head condition of the flow of a medium in the pumping system...
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7992490 |
Automatic by-pass control system for meat injection machine and method of using same
A by-pass control system for a meat injection system has a variable speed pump that transports fluid to a meat injection machine. Excess fluid is transported to a by-pass control valve. The valve...
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7988425 |
Pump and alarm control
A pump and alarm control promotes water safety and prevents entrapment in swimming pools, spas, and water features, such as fountains and waterfalls. The pump and alarm control monitors the vacuum...
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7976284 |
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...
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7975498 |
Intelligent controller for refrigerating and air conditioning systems
An intelligent controller (68), adapted for regulating operation of either a refrigeration system or an air conditioning system (20), receives an output electrical signal produced by a pressure...
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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...
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7922457 |
System and method for controlling a variable speed compressor during stopping
A compressor system operable to shutdown in response to a shutdown signal. The compressor system includes a compression device operable between a first speed and a second speed to produce a flow of...
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7878766 |
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...
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7878765 |
System and method for monitoring operation of a pump
Systems and methods for monitoring operation of a pump, including verifying operation or actions of a pump, are disclosed. A baseline profile for one or more parameters of a pump may be...
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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...
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7874809 |
Water-lifting pump apparatus and method for controlling operation thereof
A water-lifting pump apparatus which is free of a discharge valve and a check valve, is low in cost, and is capable of reducing vibration and noise due to a waterfall after the end of water pumping...
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7874810 |
Constant pressure pressurizing water pump
A water pressurizing pump includes a pump mounted in a compartment of a water tank for pressurizing and outputting water. The compartment is sealed by a cover having a first channel in...
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7869978 |
Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore
A method and apparatus for determining a fluid level and/or output flow during operation of a centrifugal pump, are provided, which may be used for production of gas and/or oil from a well, and...
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7850431 |
System and method for control of fluid pressure
Embodiments of the present invention are related to a pumping system that accurately dispenses fluid using a multiple stage (“multi-stage”) pump. More particularly, embodiments of the present inv...
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7798781 |
Metering pump with self-calibration and health prediction
A metering pump incorporates a method of relating inner loop current to a pump output pressure. Pump/motor speed, which correlates to current, is measured and controlled by a system controller....
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7777435 |
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...
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7722331 |
Control system for air-compressing apparatus
An air-compressing apparatus has four compressors individually supplying compressed air to a tank having a pressure sensor. The pressure sensor is connected to control circuits of the compressors....
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7717680 |
Charging system
A charging system used for supplying compressed air to a destination includes a compressor for generating the compressed air and a reservoir capable of being alternately discharged and recharged...
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7704052 |
Air compressor and method for controlling the same
An air compressor includes: a tank portion for reserving compressed air used in a pneumatic tool; a compressed air generation portion for generating compressed air and supplying the compressed air...
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7686590 |
Vacuum control system
A vacuum control system allows the degree of vacuum in a vacuum vessel to be kept constant while removing vaporized components degassed into the vacuum vessel through a gas permeation diaphragm by...
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7670480 |
Solvent supply with correction of piston movement
A supply flow path for supplying a solvent is described. The supply flow path includes metering devices each with a piston, the metering devices being adapted for metering the solvent through...
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7654804 |
Fluid displacement apparatus having pressure sensing device
A fluid displacement apparatus includes a housing for receiving a refrigerant, a driving shaft rotatably received in the housing, a magnetic clutch attached to the driving shaft for rotation...
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7645124 |
Estimation and control of a resonant plant prone to stick-slip behavior
A method and apparatus are provided for estimating and/or precluding stick-slip, or other oscillatory or resonant behavior, through use of a virtual transducer, which precludes the need for having...
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7641449 |
Air compressor having a controller for a variable speed motor and a compressed air tank
For a motor that drives a compressed air generator, three operating modes which includes a powerful mode for rotating a motor in a high speed range, a silent mode for rotating the motor in a low...
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7635253 |
Digital pressure controller for pump assembly
A digital pressure controller that utilizes a microprocessor provides for control of the speed of a fluid pump engine for the purpose of maintaining specified pressures at both the inlet and outlet...
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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...
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7578657 |
Enclosed pump switch level control system
An arrangement (10) for controlling the liquid level in a basin (60) by selectively actuating a pump (64) has an environmentally-sealed enclosure (22) with an internal volume subject to thermal and...
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7568893 |
Electric air pump for secondary air supply system
When an air pump is operated, a brush temperature increase rate stored in an ECU in relation to a discharge pressure of the air pump and a brush temperature is multiplied by a calculation cycle...
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7556478 |
Compressor control apparatus
A control device is provided for use with a pneumatic pump for generating output pressure, a pressure sensor for indicating the level of the output pressure, and an input device for receiving a...
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7531980 |
Aircraft cabin pressure controls: duty cycle offset to compensate for asymmetric motor loading in an open-loop motor control system
A cabin pressure control system (CPCS) software control logic modification may boost the voltage applied to a motor by applying a duty cycle offset to compensate for asymmetric motor loading. The...
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7517332 |
Infusion device for medical fluids
An infusion device comprises a pusher for a plunger of a syringe containing a liquid to be infused. A load cell measures the push force. An encoder associated to a motor commanding the pusher...
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7500835 |
Sump draining apparatus having easily replaceable sensor and mount therefor
A sump draining apparatus having a pressure transducer engaged in a receptacle that is in turn engaged in an open-ended collar of a housing. The receptacle and thus the pressure transducer is...
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7476087 |
Pump controller for precision pumping apparatus
A pump controller and pump controlling method for dispensing a precise amount of low viscosity fluid are provided in which the problems of double dispenses and stuttered dispenses are avoided. In...
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7476088 |
Air compressor
A control circuit portion in an air compressor finds the rate of decrease of pressure inside a tank portion when a motor is at rest relative to the time based on a detection signal from a pressure...
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7399165 |
Pump unit with multiple operation modes
A first pump of small capacity and a second pump of large capacity are connected directly with each other and are driven by a variable-speed motor. The rotational speed of the variable-speed motor...
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7393185 |
Fuel pump with automatic shutoff
A pressure sensor subsystem measures the pressure within a fuel pump and outputs an under-pressure signal when the measured pressure is below a predetermined threshold pressure value. A temperature...
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