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7497116 |
Flow rate estimation method of blood pump
In a flow rate estimation method of a blood pump, a general flow rate estimation formula which includes a correction term is formed based on a plurality of blood pumps. Measured data obtained from...
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7472541 |
Compressor control unit and gas turbine power plant including this unit
Provided is a compressor control unit with a high response ability to changes of gas condition of a compressor (compressor suction temperature, pressure, gas specific gravity, pressure ratio of...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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7071429 |
Linear adjustment operator for pressure control of paint pumps
A linear adjustment operator for pressure control of paint pumps including a base, an electrical switch, a linear actuator, a spring biasing the switch towards the actuator and a lever acting on...
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7055338 |
Refrigerator
A refrigerator having a compressor and a control unit for selectively activating and deactivating the compressor in response to the temperature inside the refrigerator. The selective activation and...
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7037081 |
High pressure reciprocating pump and control of the same
Pumping requirements for chromatograph applications are for constant flow at high and variable pressures and for accurate programmable control of liquid composition. A two-cylinder pump, pumping...
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7032659 |
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...
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6939110 |
Control system for I.C. engine driven blower
A system for maintaining constant pressure, such as at a mosquito fogging nozzle, by electronically controlling the speed of an engine that is coupled to a blower. A pressure sensor measures the...
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6939109 |
Pump control system
The present invention provides a system which comprises primary supply pumps and secondary supply pumps and controls pressurized water supply systems, air-conditioning systems, or the like that...
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6912862 |
Cryopump piston position tracking
An improved cryogenic compressor with piston position sensing is disclosed. Precision optical encoders using incremental or absolute encoding are incorporated into a compressor to allow for...
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6894448 |
Direct current motor condition monitoring and exercising system
Hydraulically actuated aerial lift trucks typically have a primary hydraulic pump system driven by the vehicle's engine and a backup pump system driven by a direct current motor. Due to infrequent...
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6826490 |
Transducer calibration system: apparatus and method
A transducer calibration apparatus and method for transforming both previously established transducer parameters for a transducer calibrated to a first target object material and measured...
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6814546 |
Multifan-equipped apparatus for cooling objects mounted at local interior regions and provided with fan-unit assembly and operation monitoring means having an error detector
A multifan-equipped apparatus in which a plurality of objects mounted are controllably cooled by blowing air using a fan-unit assembly composed of a plurality of fan units. The plural fan units are...
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6742994 |
Reciprocating pump with malfunction detecting apparatus
A reciprocating pump which is capable of detecting abnormalities in the sucking and discharging of fluid, such as the exhaustion of oil or the clogging of oil on the discharge side, by making use...
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6741056 |
Air sampler with compensating pump motor speed
A constant flow of air through a personal air sampler is provided regardless of changes in the air flow path, by altering the pump speed as a function of the power taken by the pump. The...
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6676382 |
Sump pump monitoring and control system
Motor speed, motor amps, float position and elapsed run time are monitored to determine whether a sump pump is in a normal condition, a jammed condition, an inadequate pumping rate condition, a dry...
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6659980 |
Methods, apparatuses, and uses for infusion pump fluid pressure and force detection
An occlusion detection system detects an occlusion in a fluid path of an infusion pump. The infusion pump is for delivering fluid to a user. The infusion pump includes a housing, a motor, a...
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6651900 |
Control apparatus for a fire pump, operation display apparatus for a fire pump and operation mode control apparatus for a fire pump
In a fire pump adapted to force out the water, which is pumped from a water source, from a nozzle provided at a front end portion of a delivery hose, a nozzle control unit 8 adapted to control...
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6623246 |
Apparatus and method for controlling operation of linear motor compressor
An apparatus and a method for controlling operation of a linear motor compressor, by which a linear motor compressor can operate always in an optimum condition by coping with the load variation due...
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6555986 |
Method and apparatus for detection of occlusions
A method and apparatus for automatically detecting an occlusion or drive system failure in a medication infusion system is provided. The electrical current to an infusion pump is measured and...
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6554577 |
Apparatus and method for controlling operation of linear compressor using pattern recognition
An apparatus and a method for controlling operation of a linear compressor uses a pattern recognition for operating a compressor at an optimum efficiency by recognizing a trace in a graph about...
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6547528 |
Control system for fire pump
A system for remote-controlling a fire pump with a simple wiring construction is provided, being capable of conducting various kinds of control and display. The fire pump control system has an...
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6540484 |
Scroll compressor with thermostat mounted in non-orbiting scroll
A thermostat is positioned within a scroll compressor such that a thermostat switch is positioned in the non-orbiting scroll, and a body of the thermostat extends through the crankcase. The...
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6537032 |
Load dependent variable speed hydraulic unit
There is provided an autonomous inverter-driven hydraulic unit in which a command pressure and command flow rate do not need to be inputted from outside and a pressure and flow rate can be...
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6524075 |
Apparatus and method for controlling operation of compressor
In an apparatus and a method for controlling operation of a linear compressor, operation of a linear compressor is controlled by finding each inflection point as a TDC (top dead center) is 0 by...
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6504338 |
Constant CFM control algorithm for an air moving system utilizing a centrifugal blower driven by an induction motor
A method and apparatus for achieving constant air flow rate economically utilizes an induction blower motor with control settings determining the motor excitation voltage. A memory stores, for a...
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6491500 |
Scroll compressor with motor protector in non-orbiting scroll and flow enhancement
A scroll compressor is provided with a motor protector mounted at a location remote from the motor. The motor protector is of the sort which operates to stop operation of the motor both when the...
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6471486 |
Compressor system and method and control for same
An electronic control system is disclosed to control and to prevent damage to a standalone or a network of oil free, two stage compressor packages. The electronic control system uses pressure and...
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6468052 |
Vacuum relief device for fluid transfer and circulation systems
A safety device for use in a fluid transfer and/or circulation system of the type which uses a pump to draw water from a reservoir through one or more intake lines each extending from an open end...
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6461112 |
Screw compression apparatus and operation control method thereof
In a capacity control method for an oil-free screw compressor, when an air consumption is larger than a set amount, a rotation frequency of a motor using an inverter to drive the compressor is set...
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6450771 |
System and method for controlling rotary screw compressors
An electronic control system dynamically varies the output capacity of a compressor by controlling plural valves associated with the compressor to provide pressurized air to a distribution system...
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6422823 |
Mini-environment control system and method
A mini-environment control device includes an individual enclosure to contain a sample and to isolate it from the external environment. An array of micropumps attached to the individual enclosure...
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6414455 |
System and method for variable drive pump control
A pump control system and method employs a variable drive for controlling the speed of an AC electric motor driving a cyclic load. A real-time tuning of the frequency and voltage of the AC input to...
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6409476 |
Pumpjack dynamometer and method
A dynamometer readout ( 42, 46 ) and method is disclosed for obtaining dynamometer information ( 110 ) related to pumpjacks ( 10 ). For this purpose, a change of pivotal direction of the walking...
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6406266 |
Motor protector on non-orbiting scroll
An inventive scroll compressor has its motor protector circuit mounted on the compressor pump unit. In this way, increased temperature from reverse rotation of the orbiting scroll causes the motor...
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6394758 |
Apparatus and method of controlling air compressor
An apparatus and method of controlling air compressors is disclosed. In this invention, an air compressor is started to supply compressed air to an air tank. A temperature sensor senses the...
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6390780 |
Pump and controller system and method
A liquid pump and controller with separate pump activation and deactivation mechanisms that are both closed detector devices is provided. The pump activation mechanism includes a float device that...
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6371731 |
Multistage blowdown valve for a compressor system
A multi-stage blowdown valve is provided that uses a single control signal to simultaneously decompress the interstage and the second stage in a compressor system. The valve uses a series of...
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6296450 |
Systems and methods for control of pumps employing gravimetric sensing
Systems and related methods pump fluid through a pump having a stroke volume. The systems and methods employ gravimetric control measures to monitor fluid flow through the pump. An actuator...
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6283173 |
Forecourt fuel pumps
A forecourt fuel pump has a casing locating means for metering and delivering to a flexible hose liquid fuel to be dispensed, and a processing unit arranged to monitor and control the delivery of...
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6213724 |
Method for detecting the occurrence of surge in a centrifugal compressor by detecting the change in the mass flow rate
A method for controlling working fluid surge in a centrifugal compressor. According to the method, surge detection is accomplished by calculating the change in the compressible fluid mass flow rate...
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6210119 |
Reverse rotation detection compressors with a preferential direction of rotation
A method is disclosed for identifying when a compressor is being run in reverse due to improper wiring. In a preferred embodiment, sensors sense the condition of a refrigerant at the inlet line and...
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6167965 |
Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores
An improved electrical submersible pump is disclosed in which a processor downhole is utilized to monitor one or more subsurface conditions, to record data, and to alter at least one operating...
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6164920 |
Perfusion system with control network
A medical perfusion system for use in connection with the medical treatment of a patient is provided with a first type of perfusion device in the form of a blood pump adapted to pump blood through...
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