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8162619 |
Method for controlling the discharge pressure of an engine-driven pump
A system for controlling the pressure output of an engine-driven centrifugal fire pump includes a discharge pressure sensor mounted in the discharge line of the pump. A governor varies the rpms of...
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8157535 |
Electrical air pump assembly and inflatable product having the same
An inflatable product includes an inflatable body having an exterior wall defining at least one air chamber therein, at least one electrical air pump unit, an electrical switch connected...
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8152482 |
Displacement control valve for variable displacement compressor
A displacement control valve for a variable displacement compressor. The displacement control valve includes a drive force transmission body, a pressure sensitive chamber, an internal passage, and...
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8092191 |
Control system for reciprocating device
A control system for a reciprocating device which includes a switching valve for directing fluid supply under pressure to one of two drive lines in an alternating manner, means for alternating the...
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8007263 |
Water-lubricated compressor
A water-lubricated compressor has a discharge on-off valve in a discharge channel located between a discharge port of a compressor body and a water separating/recovering unit. A water circulation...
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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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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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7890216 |
Control valve and positioner diagnostics
Valve positioning systems may include one or more components and a controller. Components may include one or more electric-to-pressure output converters, relays, gas supplies, and/or actuators. A...
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7828527 |
Paint circulating system and method
A paint circulating system is suitable for providing paint to applicators in a product finishing facility. The system includes a pump for pumping paint around the system and a back-pressure...
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7686588 |
Liquid chemical supply system having a plurality of pressure detectors
A liquid chemical supply system that performs accurate pressure feedback control and controls the discharge flow rate of liquid chemical with high precision, even when the pressure setting value of...
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7628590 |
Method and apparatus for reducing free flow risk
A technique for reducing the risk of free flow through a pump is disclosed. The technique includes sensing a pressure difference between the pump inlet and outlet. The pressure difference is...
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7611332 |
Device and method for controlling a thick matter pump
A device and a method for controlling a two-cylinder thick matter pump to achieve a reliable operation even of single-circuit two-cylinder thick matter pumps. To this end, the pipe switch includes...
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7539560 |
Control valve and positioner diagnostics
Valve positioning systems may include one or more components and a controller. Components may include one or more electric-to-pressure output converters, relays, gas supplies, and/or actuators. A...
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7438534 |
Wide range pressure control using turbo pump
The present invention is an apparatus and method for controlling a process flow rate and a pressure in a vacuum process chamber that is evacuated by a turbomolecular pump. A throttle valve between...
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7435059 |
Flow controlled blood pump system
A system for pumping blood to assist or assume the cardiac function of a patient is characterized by a blood pump that exhibits a steep performance curve such that only small changes in pump flow...
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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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7331773 |
Pump provided with exhaust valve device and hemodynamometer incorporating the same
A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. A motor actuates the diaphragm to introduce air into the pump...
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7237581 |
Apparatus and method of dispensing photosensitive solution in semiconductor device fabrication equipment
A method of and apparatus for dispensing photosensitive solution substantially reduces the amount of air bubbles in the photosensitive solution during the dispensing operation. The photosensitive...
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7052243 |
Pressure regulating valve
A pressure maintenance assembly for a domestic water well system. The assembly comprises a pressure maintenance valve having an inlet side and an outlet side, a pressure tank in fluidic...
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6695589 |
Control for an electric motor driven pump
An electric motor driven pump has a regulator valve for establishing a system pressure within a predetermined pressure range. The regulator valve has three bias pressures and a spring force imposed...
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6604908 |
Methods and systems for pulsed delivery of fluids from a pump
A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid...
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6599093 |
Compressor having speed and intake regulation valve control
A compressor that enables the increase of compression efficiency, the prevention of abnormal temperature rising in the discharge, and the reduction of power loss, includes a compressor body 11, an...
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6558126 |
Compressor utilizing low volt power tapped from high volt power
Low voltage electrical power is supplied to a diagnostic control device in a sealed compressor. Electrical power is tapped from a high voltage power line and transformed to low voltage power that...
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6537033 |
Open loop control apparatus for vacuum controlled systems
An open loop feedback control apparatus for a vacuum controlled system for providing vacuum stability within a predetermined range of vacuum levels is shown. The open loop feedback control...
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6530750 |
Control for progressive cavity pump
A progressive cavity pumping system includes a pump housing, a rotor member operatively received in the pump housing, a prime mover coupled to the rotor member for driving the rotor member in first...
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6530751 |
Device for controlling air filling and exhausting of an air cushion
A device for controlling air filling and air exhausting of an air cushion includes a casing provided inside with a motor controlled by a wire controller and a fan blade, and an upper cover mounted...
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6507792 |
Method of selecting devices for use in fluid pipeline network
A method of selecting devices for use in a fluid pipeline network, wherein items of data concerning devices are stored in a pipe database, a pipe joint database and a valve database, and...
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6474951 |
Controller for pump and valve
The invention relates to an apparatus including a pump 1 driven by an electronically controlled electric motor 3 with a pump controller 4 and a valve 2 operated by an electronically controlled...
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6471487 |
Fluid delivery system
The fluid delivery system comprises a Coriolis mass flowmeter, a pump, a recirculation valve, and/or a back-pressure valve. The fluid delivery system prevents the measurement of a multiphase fluid...
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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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6406268 |
Control of a compressor unit
A controller for a compressor determines a characteristic variable for an overall flow to be supplied, and generates on the basis of this characteristic variable, by means of static functions, a...
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6375847 |
Method for operating a cross-flow filtration installation
The method relates to the operation of a cross-flow filtration installation for a product. This installation includes a filtration module (6), a pipeline (3) for the inflow of the product, a...
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6341943 |
Blower
A blower supplies compressed air to a predetermined place. The blower is provided with a plurality of compressors, a common air tank for storing compressed air supplied from the compressors, a...
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6250887 |
Reversible pump-turbine system
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6241463 |
Method for determining the operating level of a fan and fan
Fore many applications it is desirable to determine the operating level, i.e. the current flow rate V and the total pressure difference Δpt of a fan in the installed state without external ...
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6234758 |
Hydraulic noise reduction assembly with variable side branch
A variable volume side branch is provided or attenuating fluid noise in a hydraulic system having a fluid pump and includes a variable volume fluid container having a fluid inlet and a fluid...
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6200100 |
Method and system for preventing incontinent liquid drip
A lift amount of a valve plug is controlled with respect to a period of time from valve-closing operation instruction time for an electric opening/closing valve to arrival at a preset quick...
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6139280 |
Electric switch gauge for screw compressors
A control apparatus, for measuring pressure in relation to a rotary screw compressor with capacity control means and a prime mover, including a pressure sensor to monitor the prime mover manifold...
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6135720 |
Air compressors of sliding vane eccentric rotor type
An air compressor includes a stator, which includes an inlet and an outlet and defines a substantially cylindrical bore, and a rotor eccentrically rotatably mounted in the bore. The rotor is...
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6123686 |
Systems and methods for cassette identification for drug pumps
The present invention concerns a pump provided with a control module and an attachable fluid reservoir cassette. The control module includes a pumping mechanism for pumping fluid from the fluid...
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6113355 |
Pump drive head pump assembly with a hydraulic pump circuit for preventing back-spin when the drive head has been shut off
A pump drive head includes a housing, and a main shaft carried on upper and lower bearings disposed in the housing. The main shaft includes an outer torque tube and a liner tube. The outer and...
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6062821 |
Integral oil filter-pump system
An integral oil filter-pump system for an electric power device which involves a cabinet having an oil-filled compartment for containing the power device, as well as a circulation pump for...
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6053702 |
Portable water pump having a pressure control circuit with a bypass conduit
A booster water pump for increasing source water pressure to a high water pressure for industrial use, has an elongated tubular hollow cylinder having both ends closed with a cylinder inlet port in...
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5993654 |
Pressurized liquid delivery apparatus
First liquid pumping apparatus for containing a first quantity of first liquid, second liquid pumping apparatus for containing a second quantity of second liquid and control apparatus for...
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5902094 |
Flow control valve for a pressure washer
A pressure washer is powered by a prime mover, e.g., an electric motor or an internal combustion engine, and has a flow control valve. The valve has a housing containing a piston assembly and the...
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5888051 |
Pump pressure control system
A system for controlling the pressure output of an engine-driven centrifugal fire pump includes a discharge pressure sensor mounted in the discharge line of the pump. A governor varies the RPM of...
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5820352 |
Method for controlling compressor discharge pressure
A method for controlling compressor discharge pressure in a compressor. The compressor comprising a compression module driven by a prime mover, the compression module having a discharge port...
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5637208 |
Solvent pumping system for chromatography with switching-valve
A pumping system for continuously delivering fluid at a selected flow rate to a receiving system. The system includes at least a first and a second pumping unit, each of the individual units...
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5372709 |
Fluid flow control apparatus
A fluid control apparatus for use in separation and filtration having a removable sterilizable and disposable element which is engagable with a fixed element in the apparatus. When the two elements...
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5326229 |
Integral air suspension compressor and engine air pump
An assembly is disclosed for supplying compressed air to both an engine and an air suspension of a motor vehicle. The assembly comprises a direct current electric motor, a centrifugal air pump, and...
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