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RE40400 |
Capacity modulated scroll machine
A scroll-type machine is disclosed which is particularly well suited for use as a compressor in refrigeration and air conditioning systems and incorporates a unique arrangement for modulating the...
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7373946 |
Vacuum tank assembly
A vacuum tank assembly is provided for use on an RV or a boat and includes a two-piece vacuum tank. The two-piece vacuum tank includes a body and a removable top with a gasket located between the...
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7338260 |
System and method for controlling current provided to a stepping motor
A system and method is disclosed for controlling the input electrical current to an infusion pump stepper motor based on predetermined torque requirements. The system can include a motor controller...
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7328626 |
Apparatus for generating and conducting a fluid flow, and method of monitoring said apparatus
The apparatus comprises a displacement pump with at least one flow vessel, with a pump drive, and with a support means for holding the flow vessel. Furthermore, the apparatus comprises a measuring...
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7326038 |
Pressure switch mechanism and air compressor using the same mechanism
An air compressor comprises a tank portion for reserving a compressed air, a compressed air generating portion for generating the compressed air to be supplied to the tank portion, a motor for...
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7316336 |
Quantitative dosing of small amounts of liquids
The invention relates to quantitative dosing of small amounts of liquids having a volume of microliter or nanoliter order. Such a dosing technique is useful for instance for productive serial...
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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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7273359 |
Peristaltic irrigation pump system
A peristaltic pump tubing system for use with a peristaltic pump roller assembly in a surgical procedure. The system comprises a uniquely shaped disposable cassette for retaining tubing to be used...
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7189320 |
Pump, pump for liquid chromatography, and liquid chromatography apparatus
The invention provides a pump for liquid chromatography excellent in feeding liquid stably at an extremely low flow rate and in discharging bubbles at startup. In a pump for liquid chromatography...
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7121808 |
High frequency air pulse generator
An improved air pulse generator produces high frequency chest wall oscillations (HFCWO) and includes means for internal heat dissipation. Internal heat generated by an internal diaphragm motor is...
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7118348 |
Compressed air system and method of control
A compressed air system, wherein a decision to de-energize a compressor motor is made with consideration of the likely need for the operation of the compressor at a future point in time. A rate of...
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7086838 |
Fuel system with a field modification module for controlling fuel flow
The present invention provides a system for controlling speed of the fuel pump. The system includes a fuel pump, a controller, and a field modification module. The fuel pump is configured to...
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7083392 |
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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7083391 |
Method and device for detecting the speed of a pump
A method and a system for detecting the speed of a pump motor of a hydraulic pump system are provided, in which pump system a pump is driven by a pump motor to deliver hydraulic fluid into a pump...
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7080792 |
Liquid pressurizing device
A liquid pressuring device comprises a reciprocating pump ( 1 ), pressure sensor ( 23 ) and pressure control unit ( 25 ) which is adapted to control the motion of the plungers ( 5 A, 5 B) so as to...
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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...
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7063513 |
Liquid chromatograph pump with dual cylinders and dual plungers
In a pump for feeding a liquid for chromatography, first and second plungers form first and second volumes respectively together with first and second chambers, the first plunger is prevented from...
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7059836 |
Pump
The invention provides a pump which has reduced pressure loss by using fewer mechanical on-off valves, which has increased reliability, which can be used under a high load pressure, which can be...
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7056096 |
Pump
The invention provides a pump with high driving efficiency in which the number of mechanical switching valves is decreased to reduce pressure loss and increase reliability, and which is ready for...
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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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7018178 |
Variable displacement pump and control therefore for supplying lubricant to an engine
A control system for a variable displacement pump. The control system is operably associated with an engine control unit for passively or actively controlling the output of the pump in response to...
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6981838 |
Method and apparatus for detecting the occurrence of surge in a centrifugal compressor
A method and apparatus for detecting the occurrence of surge or incipient surge in a centrifugal compressor is supplied. The centrifugal compressor has an inlet passage, an inlet passage wall and...
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6954713 |
Cavitation detection in a process plant
A monitoring system for use in a process plant having a pump or other device capable of undergoing cavitation, uses a characteristic curve, a model and/or process variables, such as indications of...
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6939111 |
Method and apparatus for controlling medical fluid pressure
A method, system and apparatus for performing peritoneal dialysis are provided. To this end, in part, a method of controlling pressure in a medical fluid pump is provided. The method includes the...
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6872055 |
Mud suction unit
The invention relates to a mud suction unit having a suction element which is connected to a receiving container and has a motor for the generation of a suction flow and also has a discharging...
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6866483 |
High-pressure cleaning device
High-pressure cleaning device with an electric motor and a pump for conveying a cleaning fluid, with a plunger, which is displaceable by the cleaning fluid in dependence on its pressure or its flow...
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6863502 |
Variable speed hydraulic pump
The invention provides a variable speed hydraulic pump designed to operate at a maximum horsepower throughout its pressure range by adjusting motor speed according to motor load parameters. In...
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6840745 |
Diaphragm pump including a wobble plate
A diaphragm pump comprises a two part casing formed of a front cover ( 10 ) and a back cover ( 12 ). A diaphragm plate ( 14 ) extends across the covers ( 10,12 ) and is secured therebetween when...
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6799950 |
Method and apparatus for controlling a compressor
A method and apparatus for controlling a compressor suitable for delivery of pressurized fluid to a pressurized fluid system, wherein the delivery of the pressurized fluid to the pressurized fluid...
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6783328 |
Method and apparatus for controlling fluid pumps
Fluid pump control modes in a medical perfusion system include a Back Off Response Mode, a Flow Servo Mode, a Pressure Servo Mode, and a Master-Slave Servo Mode. In the Back Off Response Mode,...
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6748739 |
Hydraulic power system
A hydraulic power system includes a reversible pump, a variable-speed servomotor for driving the pump, a pressure sensor for detecting load pressure, a detector for detecting the motor speed,...
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6739841 |
Oil free screw compressor operating at variable speeds and control method therefor
An oil free screw compressor having a low-pressure stage compressor body and a high-pressure stage compressor body. Power of a motor driven by an inverter is transmitted to the compressor bodies...
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6729849 |
Constant pressure pump controller system
A constant-pressure pump controller system for maintaining a substantially uniform discharge pressure of liquid output from a pump operated by an electric motor and where liquid is delivered to a...
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6729848 |
Sensor mount for sump draining apparatus
A sump draining apparatus having an 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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6709241 |
Apparatus and method for controlling a pump system
A controller for controlling operating parameters associated with fluid flow, speed or pressure for a centrifugal pump for pumping fluid, wherein at least one sensor is coupled to the pump for...
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6688320 |
Utility conservation control methodology within a fluid pumping system
The present invention relates to a process of utility conservation control methodology within a fluid pumping distribution system. With fluid flowing through a distribution grid, the pressure at...
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6685437 |
Hydraulic transmission pump assembly having a differential actuation and integrated line pressure control
A hydraulic transmission pump assembly includes a pump adapted to provide fluid under pressure to predetermined components in a transmission, an electric motor operatively coupled to the pump, and...
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6655922 |
System and method for detecting and diagnosing pump cavitation
The present invention provides cavitation detection systems and methods employing a classifier for detecting, diagnosing and/or classifying cavitation in a pumping system. The classifier can be...
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6644929 |
Pressure regulating valve
A pressure maintenance assembly for a domestic water well system. The assembly includes a pressure maintenance valve having an inlet side and an outlet side, a pressure tank in fluidic...
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6623247 |
Method and apparatus for controlling a variable displacement hydraulic pump
A method and apparatus for controlling a variable displacement hydraulic pump having a swashplate pivotally attached to the pump. The method and apparatus includes determining a desired swashplate...
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6619930 |
Method and apparatus for pressurizing gas
A system and method for compressing gas uses a hydraulic pump and a hydraulic accumulator to compress gases in gaseous form. The accumulator is divided into a hydraulic chamber and a pneumatic...
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6604909 |
Diaphragm pump motor driven by a pulse width modulator circuit and activated by a pressure switch
A pump assembly that has a control circuit and a pressure switch which control the operation of a pump motor. The motor drives a positive displacement pump that is coupled to a fluid system. The...
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6599094 |
Screw compressor system and operating method thereof
A screw compressor system comprises a plurality of screw compressors the capacity of each of which is controlled by repeating load operation and no-load operation. Using a timer output...
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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, ...
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6595757 |
Air compressor control system
An air compressor control system is constructed to include a motor, an accumulation tank, a pump, a pressure switch, a pressure control valve, and a micro-controller. When the pressure of the...
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6592342 |
Water supply system
A water supply system has its housing and pressure tank sized so that the pressure tank fits within the housing, thus avoiding the need for another separate opening in the ground for the pressure...
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6568426 |
Pressurized water supply systems
A pump assembly for a pressurized water system includes a pressure sensitive switch ( 27 ) arranged to monitor the water pressure in a pipe ( 14 ) extending between a water delivery pump ( 13 ) and...
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6558125 |
Injector for applying fluids fitted with a pressure measuring system
The injector of the invention serves for applying contrast media for X-ray or nuclear spin tomography and has a tube ( 3 ), as well as a roller pump ( 7 ) surrounded at least partially in...
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6551066 |
High pressure portable air compressor
A portable air compressor includes a frame, a motor mounted to the frame, a storage tank coupled to the frame and a compression mechanism in communication with the storage tank. The motor drivingly...
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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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