| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417026000 | With condition responsive control of pump fluid valve | 28 |
| 20080240928 | REFRIGERANT SUCTION STRUCTURE IN FIXED DISPLACEMENT TYPE PISTON COMPRESSOR, AND OPERATION CONTROL METHOD IN FIXED DISPLACEMENT TYPE PISTON COMPRESSOR - An introduction passage of rotary valve has outlets for feeding out refrigerant in a suction pressure zone toward each of compression chambers. A switch portion in a shutoff state shuts off a portion of the suction pressure zone within a compressor from the outlets of the introduction passage. The switch portion includes a valve body, a working pressure chamber, and a working pressure applying portion. The working pressure chamber introduces a working pressure that is applied to the valve body so as to arrange the valve body at a communication position. The pressure in the suction pressure zone acts against the pressure in the working pressure chamber through the valve body. | 10-02-2008 |
| 20080260539 | Apparatus and Method For Controlling Supply of Barrier Gas in a Compressor Module - An apparatus for controlling the supply of barrier gas to a compressor module includes a pressure housing containing an electric motor which via a shaft is drivably connected to a compressor. The shaft is supported by magnetic bearings and at least one axial seal around the shaft which divides the pressure housing into first and second compartments including the motor and compressor, respectively. The second compartment has fluid inlet and outlet. A line is fluid-connected to the first compartment for barrier gas from a reservoir, with a flow restriction element between the reservoir and first compartment. The apparatus facilitates a method for controlling the supply of barrier gas based on gas velocity through the seal and pressure in the second compartment. An overpressure can be set in the reservoir. A controlled supply of barrier gas to at least the first compartment is effected via flow restriction in the feed pipe. | 10-23-2008 |
| 20090004025 | Variable Displacement Compressor - A variable displacement compressor comprising a first control means for detecting the suction pressure of fluid or the crank chamber pressure and controlling the suction pressure to a target control value, and a second control means including means for detecting high-pressure side pressure to control the displacement of the compressor so as to relax an increase in the high-pressure side pressure when it is equal to or higher than a predetermined threshold and increasing the control value of the suction pressure depending on the increase in the high-pressure side pressure in a region exceeding the threshold. The control system is simple, the control valve is inexpensive and simple and capable of stabilized operation, and the variable displacement compressor has the internal control means suitable for refrigeration cycle operating in a supercritical region. | 01-01-2009 |
| 20090060750 | Fluid transportation device - A fluid transportation device includes a valve seat, a valve cap, a valve membrane, multiple buffer chambers, a vibration film and an actuator. The valve membrane is arranged between the valve seat and the valve cap, and includes several hollow-types valve switches, which includes at least a first valve switch and a second valve switch. The multiple buffer chambers include a first buffer chamber between the valve membrane and the valve cap and a second buffer chamber between the valve membrane and the valve seat. The vibration film is separated from the valve cap when the fluid transportation device is in a non-actuation status, thereby defining a pressure cavity. The actuator is connected to the vibration film. When the actuator is driven to be subject to deformation, the vibration film connected to the actuator is transmitted to render a volume change of the pressure cavity and result in a pressure difference for moving the fluid. | 03-05-2009 |
| 20090097985 | 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 switching valve, and an exhaust circuit including and exhaust outlet, a first flow restrictor disposed between one drive line and the exhaust outlet, and a second flow restrictor disposed between the other drive line and the exhaust outlet. The system may include a selection valve for alternately connecting one of two drivelines to the exhaust outlet. | 04-16-2009 |
| 20100054956 | Pressurized-Oil Supply Amount Control Device for Vehicle-Mounted Crane - Disclosed herein are embodiments of a pressurized-oil supply amount control device for a vehicle-mounted crane which has a dual pump system and which is capable of further inhibiting possible noise from an engine and improving fuel consumption. A predetermined control function is set for a controller | 03-04-2010 |
| 20110038736 | METHOD FOR CONTROLLING A FILLING PROCESS OF A WATER-BEARING HOUSEHOLD APPLIANCE - A method for controlling a filling process of a water-bearing household appliance. The method includes opening a locking arrangement to fill the water-bearing household appliance with water, wherein the locking arrangement is controlled by the water-bearing household appliance; monitoring a fill sensor that detects the water flowing into the water-bearing household appliance; activating a pump to convey the water that flowed into the water-bearing household appliance as a result of the absence of at least one signal from the fill sensor; and analyzing a performance characteristic of the pump. | 02-17-2011 |
| 20110194945 | METHOD FOR TRANSPORTING A FLUID AND DEVICE FOR PRODUCING A VOLUME FLOW - The invention relates to a method for transporting a fluid for generating a fluid jet, wherein the fluid is delivered from a pump under pressure with a predetermined volume flow to an exit opening. In the event of an interruption of the volume flow, the pump is automatically switched from an operating mode for generating pressure to an operating mode for suctioning fluid; and a device for producing a volume flow for realizing a fluid jet for cutting and/or flushing of material, comprising a pump with an operating mode for generating pressure in the fluid and for generating suction. The device is constructed such that during interruption of the set volume flow, the pumpcan be switched over or switches over automatically from the operating mode for generating pressure to an operating mode for generating suction for the purpose of suctioning fluid. | 08-11-2011 |
| 20110280736 | CONTROL METHOD OF DRYER - A control method of a dryer is disclosed. A control method of a dryer including a heat pump having a variable velocity type compressor, the control method includes steps of selecting at least one course supplying air or dried air; increasing an activation velocity of the compressor to a target velocity, as the selected course is implemented; and adjusting an open degree of an expansion valve provided in the heat pump. | 11-17-2011 |
| 20120014812 | Compressor Surge Control System and Method - A system and method for controlling gas surges in compressors powered by electric motors. An adjustable speed drive (ASD) incorporating a microprocessor powered by a three-phase source of electricity controls the electric motor which drives the compressor. A bypass valve is inserted between the gas input of the compressor and the gas discharge. The bypass valve opens in response to signals from the ASD which detects gas surges by analyzing a stored surge map which plots a surge line and a related discretionary control line based on the power and speed of the motor. When the operating point of the motor crosses the control line, the ASD causes the bypass valve to open. | 01-19-2012 |
| 20120020809 | IDLE DOWN CONTROL FOR A PRESSURE WASHER - A method of controlling the speed of an engine includes positioning a throttle at an operating position between an idle position that reduces the engine speed to an idle speed, and a normal speed position at which the engine runs at a speed greater than the idle speed, collecting a fluid within a manifold, sensing a pressure within the manifold, and adjusting the operating position of the throttle in response to the sensed pressure. When the sensed pressure is low, the throttle is moved toward the idle position and when the pressure is high, the throttle is moved toward the normal speed position. The method further includes positioning an unloader downstream of the manifold, the manifold configured in one of a first position in which the unloader directs fluid from the manifold to the pump, and a second position in which the unloader directs fluid to a point of use. | 01-26-2012 |
| 20120045346 | ELECTRONIC PROPORTIONER USING CONTINUOUS METERING AND CORRECTION - The controller of the plural component proportioner ( | 02-23-2012 |
| 20120063919 | FLUID-WORKING MACHINE VALVE TIMING - A fluid-working machine has a working chamber of cyclically varying volume, high and low pressure manifolds, and high and low pressure valves for regulating the flow of fluid between the working chamber and the high and low pressure manifolds respectively. A controller actively controls at least one said valve to determine the net displacement of working fluid of the working chamber on a cycle by cycle basis. At least one said valve is a variable timing valve and the controller causes the valve to open or close at a time determined taking into account one or more properties of the performance of the fluid working machine measured during an earlier cycle of working chamber volume. | 03-15-2012 |
| 20120269651 | COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control. | 10-25-2012 |
| 20130209272 | VACUUM PUMP CONTROL DEVICE AND VACUUM PUMP - An object of the present invention is to improve, using a simple configuration, heat dissipation of a regenerative resistor that is disposed in a vacuum pump control device (controller) connected to a vacuum pump. The regenerative resistor disposed in the vacuum pump control device is stored in an aluminum die-cast casing. More concretely, a housing of the vacuum pump control device is prepared by aluminum die casting (metal mold casting). A regenerative resistor storing portion (aluminum die-cast casing) provided with a hollow portion is provided on a top panel of the aluminum die cast, the hollow portion being designed to have a size accommodating the entire regenerative resistor. The regenerative resistor is fitted into the hollow portion, and an opening section of the hollow portion is sealed with an aluminum sheet of the same material as that of the casing. In this manner, the regenerative resistor can removably be stored in the aluminum die-cast casing. | 08-15-2013 |
| 20130209273 | CONTROL APPARATUS FOR VEHICLES, OPERATING MACHINES OR THE LIKE - The control apparatus includes feeding and delivery lines of the operating fluid, a pump-brake having a containment body which defines a sliding chamber and a main piston housed sliding inside the chamber, a control element controlling the movement of the main piston which can be operated by an operator, a control device for controlling the motion transmission of a vehicle or of an operating machine including a fixed part and a moving part suitable for cooperating together, wherein the moving part is suitable for moving through the operation of the control element and includes an auxiliary piston moving between a reference position and at least a detection position and mechanically connected to the moving part to move it with respect to the fixed part during its movement between the reference position and the detection position, the auxiliary piston moving towards the detection position through the movement of the main piston. | 08-15-2013 |
| 20130243608 | CONTROL DEVICE OF HIGH PRESSURE PUMP - When a flow regulating valve is opened, the passage of current through a solenoid is stopped to move a movable part from a closing-side position to an opening-side position and to thereby open the flow regulating valve. When a sound reducing control performing condition is fulfilled, a valve-opening control for reducing sound is performed. In the valve-opening control, until a fuel pressure in a pump chamber is decreased and the flow regulating valve is opened, the passage of current through the solenoid is continuously performed to hold the movable part at the closing-side position. After the flow regulating valve is opened, the passage of current through the solenoid is stopped. Before the movable part reaches the opening-side position, the passage of current is again temporarily performed. An electromagnetic attracting force is temporarily generated and a moving speed of movable part is decreased by the attracting force. | 09-19-2013 |
| 20130315750 | ELECTRO-HYDRAULIC VALVE POSITIONER - The current invention relates to motor valves and actuators associated with such motor valves. More particularly, the current invention relates to an electro-hydraulic positioner for such actuators so that the valve can be opened, closed or partially opened. The invention also relates to a method for positioning an actuator for a motor valve. The method utilizes a hydraulic liquid. | 11-28-2013 |
| 20140093395 | METHOD FOR COMPRESSING GASES USING SAME GAS AS WORKING FLUID - A method of compressing gas using the same gas as the working fluid, using a compressor comprising a reciprocating piston type compressor, a driving cylinder and a driven cylinder. The piston type compressor receives low pressure gas and fills the driven cylinder to a medium pressure target. A valve then directs the output from the piston type compressor to fill the driving cylinder, creating sufficient force to drive the connecting rod between the cylinders fully toward the driven cylinder. The connecting rod force compresses the gas in the driven cylinder and forces it out through a one way valve to a storage cylinder. A valve then directs the piston type compressor to fill the opposite side of the driving cylinder and the driven cylinder, forcing the connecting rod to retract. This cycle is repeated until the final output target high pressure is achieved in the storage vessel. | 04-03-2014 |
| 20140119948 | HYDRAULIC PRESSURE SUPPLY SYSTEM OF AUTOMATIC TRANSMISSION - A hydraulic pressure supply system of an automatic transmission for a vehicle may include a low-pressure hydraulic pump driven by an electric motor, generating low hydraulic pressure using oil stored in an oil pan, and supplying the low hydraulic pressure to a low pressure portion and a cooler, and a high-pressure hydraulic pump driven by the electric motor, increasing a portion of the low hydraulic pressure to high hydraulic pressure, and supplying the high hydraulic pressure to a high pressure portion through a high-pressure line fluid-connecting the high-pressure hydraulic pump to the high pressure portion, wherein a pressure sensor for detecting the low hydraulic pressure supplied to the cooler may be disposed at an input side of the cooler, and a rotation speed of the electric motor may be controlled based on the low hydraulic pressure detected by the pressure sensor. | 05-01-2014 |
| 20140286793 | PUMP CONTROL UNIT - In order to realize, without inviting cost increase, a control for maintaining a pressure of fluid delivered from a pump at a target value, a pump control unit is provided with a driver control unit controlling a rotational speed of a hydraulic pump through adjustment of a duty ratio of a PWM signal driving excitation coils of an electric motor. Further, the pump control unit is provided also with a signal correction circuit configured to convert a current flowing in the excitation coils to a voltage signal with using a shunt resistor and to divide the voltage signal with using a voltage division ratio setting circuit and to shorten an ON signal of the PWM signal by increasing the divided voltage. The voltage division ratio setting circuit has a characteristics of setting the divided voltage higher, the longer an ON period of the PWM signal. | 09-25-2014 |
| 20140369853 | CONTROL FOR ENGINE DRIVEN COMPRESSOR - A controller for a vehicle pneumatic system loads a compressor responsive to engine power absorption by the engine and air storage facility air pressure readings up to a pressure limit. The controller is responds to power demand on the engine in excess of an engine speed related global maximum and air pressure readings down to a global minimum for unloading the compressor. The controller provides for loading and unloading the compressor to maintain storage facility pressure within an operating maximum and an operating minimum which lie between the global maximum and global minimum pressures. The controller responds to air pressure readings reaching or falling below the global minimum for loading the compressor and to air pressure readings reaching or exceeding the global maximum for unloading the compressor. | 12-18-2014 |
| 20160084245 | DOSING PUMP SYSTEM - A compact, modular dosing pump system that is capable of microdose and macrodose volume flow rates, reduces or eliminates the need for additional flow control components such as temperature and pressure sensors, and utilizes a wider operational flow range than existing systems while maintaining the level of accuracy and precision exhibited by conventional dosing pump systems is provided. The dosing pump utilizes a control system to deliver a range of fluid volumes. The control system monitors the motor emf voltage, calculates the flow rate, and makes adjustments to the pump motor voltage to precisely maintain the desired flowrate. | 03-24-2016 |
| 20190145401 | AUTOMATED CROSS-PHASE PUMP AND CONTROLLER | 05-16-2019 |
| 417027000 | Having independent means for delaying valve actuation | 1 |
| 20090041588 | Active valve system for positive displacement pump - An active valve system may be used to improve operation of the suction valve(s) of a positive displacement pump. As appropriate, the active valve system may apply a force to the suction valve directed to open and/or close the suction valve. By quickening the opening and/or closing of the suction valve, the pump may run at a higher speed and operate with less wear. Additionally, the active valve system may allow all suction valves of a pump to be held open for various purposes. | 02-12-2009 |
| 417029000 | Fluid and motor controls separately responsive to diverse conditions | 3 |
| 20090317260 | Compressor-Driver Power Limiting in Consideration of Antisurge Control - A control method and apparatus for simultaneously protecting a compression system from driver overpowering and turbocompressor surge. When overpowering is detected, flow rate through the each compressor in the turbocompressor train is reduced by closing an inlet throttling valve at the inlet of each respective compressor stage unless a compressor operating point is sufficiently near surge. In this latter case, the inlet throttling valve is not closed. In this way, overall flow rate through the compressor train is reduced while maintaining adequate flow through compromised stages to avoid surge. | 12-24-2009 |
| 20150086382 | PUMPING SYSTEM CONTROL - A method and a control arrangement are disclosed to measure a total flow rate through a pump device before a pump pressure or rotational speed change; and to change at least one of: the pump pressure by a predetermined pressure step or the pump rotational speed by a predetermined rotational speed step. The arrangement can measure a total flow rate through the pump device after the pump pressure or rotational speed change; and determine a need for a further pump pressure or rotational speed change step based on total flow rate measurements carried out before and after the pump pressure change. | 03-26-2015 |
| 417030000 | Liquid accumulation controlled discharge valve downstream of motor controller sensing means | 1 |
| 417031000 | Motor controller responsive to liquid pressure | 1 |
| 20130177449 | OPERATING A PIEZOELECTRIC ACTUATOR MEMBRANE OF A PRESSURE CHAMBER - A method of controlling a pressure of a fluid in a pressure chamber, which pressure chamber is delimited by an actuator membrane having a first piezoelectric portion arranged in a central zone of the actuator membrane and at least one second piezoelectric portion arranged in at least one peripheral zone of the actuator membrane; and an ink jet printing device. In a neutral stage, a first flexure state of the actuator membrane is provided by applying first and second voltages to respective piezoelectric portions. In an activation stage, the first and second voltages are temporarily varied, without reversing their polarity, such that a curvature of the central part of the actuator membrane and a curvature of the peripheral part of the actuator membrane are changed in opposite directions, in order to expell a droplet of fluid through a nozzle. | 07-11-2013 |
