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8177521 |
System and method for monitoring and controlling oil return to compressor
A system and method for monitoring and controlling oil return to a compressor, characterized by monitoring and controlling oil level, oil temperature, and compressor outlet pressure, so as to...
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8167577 |
Fuel pump device
A fuel pump device includes a fuel pump in which pressure-generating components in the form of a movable piston movable through a cylinder in the fuel pump together are operable to pressurize the...
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8157536 |
Rotating speed adjustment circuit and related control system for a heat dissipation fan
A rotating speed adjustment circuit for a heat dissipation fan includes a first node, a second node, a reception end for receiving a first control signal, a first resistor coupled to a voltage...
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8152475 |
Method for controlling operation of a compressor
In a method for controlling operation of a compressor, the compressor is shut off by a control device in order to prevent thermal damages when an estimated temperature value Ts calculated by said...
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8093850 |
Fan control system
A fan control system includes a linear adjustor, an input/output controller, and a temperature sensor. A first terminal of the linear adjustor is connected to a first power supply. A second...
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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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8038412 |
Temperature management for electric motor driven pump
A hydraulic pump system is provided that includes a pump driven by an electric motor. The electric motor includes windings that receive power from a power source. In one example, a temperature...
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8021130 |
Apparatus and method for handling fluids at nano-scale rates
Apparatus and Method for Handling Fluids at Nano-Scale Rates. A linear displacement pump produces non-pulsatile liquid flow rates as low as the nl/mm range. The pump includes a servo motor, a gear...
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7966839 |
Method and system for controlling a compressor for an HVAC module
A system for controlling a heating and cooling system for use on a machine includes a condenser, an evaporator assembly, an electric motor driven compressor, and a master controller operable to...
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7965054 |
Vacuum pump
A vacuum pump capable of accurately detecting a rotor temperature based on a change in permeability of a magnetic material. Two targets are fixed to a nut opposed to a gap sensor. The nut is made...
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7927079 |
Electrically operated hydraulic pump
An electrically operated hydraulic pump having a pump portion and a motor portion includes rotation controlling means controlling rotation of a rotor, first rotor position detecting means detecting...
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7893178 |
Process for storing a monomer phase which is liquid under the conditions of storage
A process for storing a monomer phase which is liquid under the conditions of storage and comprises methacrylic monomers to an extent of ≧95% by weight and has been obtained by condensation out o...
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7841837 |
Cooling-fan rotation-speed control circuit
The present invention discloses a cooling-fan rotation-speed control circuit, wherein a plurality of sets of input power sources respectively having different voltages is electrically and parallel...
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7841541 |
Fan having a sensor
A fan has a sensor (86; 186) for sensing at least one value of the air that flows through the fan (20; 120). The fan has a fan housing (22, 24; 122, 124); an electronically commutated...
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7832421 |
System and method for making hot water available in a domestic water installation and domestic water installation
A method, system and device for making hot water available in a water-supply system is disclosed. The water-supply system includes a source of hot water, a hot-water line and one or more tap...
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7808363 |
Overheat protection for pump
An overheating protection device id disclosed for electrically coupling an electrical power source to a fluid propulsion device. The fluid propulsion device includes a propelling member within a...
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7708056 |
Fan controlling system and method
A fan controlling system and method is applicable to an electronic device with a fan for adjusting a temperature of the electronic device. The fan controlling system includes a plurality of...
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7658737 |
Method and apparatus to sense temperature in an implantable pump
An implantable drug infusion pump for delivering drug therapy is made more reliable and its performance improved by monitoring drug pump temperature. Monitoring pump temperature can also provide...
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7641546 |
Cooling apparatus and method for controlling the same
A cooling apparatus and a method for controlling the same are disclosed. The cooling apparatus is adapted to cool a system in which a heat source generating heat is arranged. The cooling apparatus...
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7621721 |
Vacuum pumping device with electronic control of the motor
An oil mechanical vacuum pump, which is equipped with an electric motor comprises an electronic control device for supplying the electric motor with power. The electronic control device comprises a...
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7607895 |
Fluid circulation pump with synchronous motor, equipped with heating means of the fluid, in particular for washing machines
A fluid circulation pump (10) with synchronous motor (14), equipped with fluid heating device (40), particularly for washing machines or the like, of the type comprising a rotor (18), equipped with...
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7607750 |
Pump control mechanism, printer incorporating the same, and pump control method
A pump member is cyclically moved to apply an air pressure to a liquid supply source to thereby supply liquid stored therein to a reservoir member. A driving source is driven in accordance with...
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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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7540718 |
Hermetic compressor
A hermetic compressor comprises a hermetic container, an electric motor installed inside of the hermetic container, a compressing mechanism disposed within the hermetic container and driven by the...
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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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7421316 |
Method and device for regulating fluid pump pressures
A method is provided for regulating fluid pump pressures by detecting an elevation differential between a fluid flow control device and the distal end of a fluid line in communication with the...
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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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RE40399 |
Low charge protection vent
A vent is included into a scroll compressor for protecting a refrigerant system in the event of loss of charge. The vent selectively taps an entrapped compression chamber to a housing chamber which...
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7322806 |
Scroll compressor with externally installed thermostat
A thermostat for sensing an unduly high temperature in a sealed compressor, which is a scroll compressor in the disclosed embodiment, extends through the housing of the sealed compressor into the...
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7317296 |
Electric motor
The electric motor is equipped with an electronic control, for example in the form of a frequency converter (2) and comprises at least one Seebeck element (6) whose one side is connected to the...
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7281912 |
Compressor having a safety device being built in at least one of the screw plugs of the oil-separator
A compressor is provided with an oil separator for separating part of the lubricating oil contained in the compressed refrigerant, path arrangement for connecting a separation chamber of the...
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7182583 |
Electro-hydraulic power unit with a rotary cam hydraulic power unit
An electro-hydraulic power unit is disclosed that includes a housing filled with hydraulic fluid. A hydraulic power unit is disposed within the housing, the power unit having a mechanical power...
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7140382 |
Water circulating system having thermostatically controlled bypass valve
A water circulating system including a water control fixture having an operating valve and a thermostatically controlled bypass valve disposed in the fixture for bypassing water away from the...
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7142125 |
Fan monitoring for failure prediction
A method for monitoring a fan comprises measuring power usage of the fan, determining a derivative of the measured fan power usage, tracking the derivative over time, and predicting impending fan...
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7090469 |
Turbomolecular pump
A turbomolecular pump (10) comprises a stator (12, 18), a pump rotor (20) a motor (28) for driving the pump rotor and a control device (42). The control device (42) controls the motor output power...
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7089955 |
Recreational vehicle low temperature water supply warming system
The present recreational vehicle water warming and circulating system uses the heated water in the water heater to heat the on-board water supply when the outside air temperature drops below the...
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7077155 |
Hot water recirculating system
A hot water circulating system to provide instant hot water including a hot water source connected to one or more fixtures and a hot water return line from the fixture to the hot water source...
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7070393 |
Method for regulating a compressor installation with a dryer and compressor installation used therewith
The invention relates to a method for regulating a compressor installation with at least one compressor element (6) driven by a motor and, in the pressure conduit (11) thereof, a dryer (2) of the...
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7048511 |
Device for prevention of backward operation of scroll compressors
A method and apparatus which provides a pressure sensor and/or temperature sensor connected to the low pressure side of a refrigeration system, or the discharge line of a scroll compressor. When...
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7044715 |
Controller for oil wells using a heated probe sensor
A controller for controlling the pump unit of an oil well includes a sensor having a first and second probe for placement in the flow of oil from the well bore. Each of the probes contains a...
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7044714 |
System and method for controlling pumping of non-homogenous fluids
A controller for controlling the pump unit of an oil well includes a sensor having a first and second probe for placement in the flow of oil from the well bore. Each of the probes contains a...
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7036520 |
Hot water heater recirculation system and method
A hot water recirculation system includes a source of hot water, a fixture, a fluid circuit, a fluid pump, and an electrical circuit sensor. The fixture is remote from the source of hot water and...
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7033147 |
Centrifugal fluid pump assembly with flow rate calculating section
A centrifugal fluid pump assembly includes a body section and a control mechanism 6. The body section includes a housing, an impeller rotatable within the housing, and a motor for rotating the...
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7029239 |
Piecewise linear control of the duty cycle of a pulse width modulated signal
A system may include a PWM generator and control logic. The PWM generator is configured to generate a PWM signal having a duty cycle dependent on a duty cycle value generated by the control logic....
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6966759 |
Compressor diagnostic and recording system
A compressor diagnostic system incorporates a control which receives a plurality of data streams about various operational features of the compressor. As an example, both temperature and pressure...
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6962162 |
Method for operating a multi family/commercial plumbing system
A method for operating a multi-family/commercial plumbing system includes sensing an event and recording for each sensed event at least one parameter selected from the group consisting of date, day...
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6925823 |
Refrigerant cycle with operating range extension
A refrigerant cycle is provided with a control that monitors system conditions such as current, voltage or temperature at a compressor motor or refrigerant state conditions at compressor ports. A...
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6905313 |
Pressure production unit and ink jet printer using the same
A pressure production unit provided in an ink jet printer. The pressure production unit includes: an air pump unit; a drive source that drives the air pump unit; a storage unit; a temperature...
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6895985 |
Smart device and system for improved domestic use and saving of water
A system for providing a user with water at a desired temperature comprising a piping system that includes a hot water pipe and a cold water pipe, a pump coupled to the piping system and a smart...
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