Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 451 - 500 out of 3,457

Document Document Title
WO/1983/004286
The method is applied to a turbomachine, particularly to a pump, and to a support for a pressure sensor of a gaseous or liquid fluid, particularly an electronic pressure pick-off. The pressure or differential pressure of the fluid (3) co...  
WO/1983/003461
A device allows to reduce the power used by the motor of a circulation pump actuated by an electric motor for heating installations. The reduction is obtained by interrupting periodically the network power supply by means of an electroni...  
JP2013256868
To provide a water feed pump device suppressed in an excessive/insufficient water amount stop and a pressure variation at restart.In a water feed pump device, a variable speed control device has: upper limit target pressure on a piping r...  
JP2013256869
To provide a water supply pump device, capable of controlling the stop of a water supply pump when the water amount is excessively small, and controlling the pressure fluctuation when restarting the water supply pump.A water supply pump ...  
JP2013256867
To provide a water feed system configured to solve problems by enabling a water feed system side to have a pressure target value, an initial inverter frequency (target flow rate) and a function for designating the number of necessary pum...  
JP2013256926
To provide a drainage pump that can easily and reliably drain foreign matter by stopping a motor or reversely rotating the motor when the foreign matter is sucked into the drainage pump, and to provide a method of controlling the drainag...  
JP2013227975
To enable estimation of a characteristic value (pressure, flow rate) of a pump circuit with an extremely high degree of certainty independently of a standard pump curve without the use of a sensor within a pump circuit.In relation to a m...  
JP2013217275
To provide a low-cost water supply system with improved maintainability and simple system configuration, while enabling easy pump operation control, and to provide an operation method of the water supply system.A water supply system incl...  
JP2013217274
To provide a water supply system capable of increasing and reducing the number of pump devices in response to an actual load by maintaining precise detection of a water supply pressure.In a water supply system, n pump devices each includ...  
JP2013204531
To provide a magnet pump device capable of preventing a large electric current from flowing in the beginning of start-up.A magnet pump device includes a pump casing 4 having an inlet 24 and an outlet 28, a driving magnet 8 arranged outsi...  
JP2013199839
To provide a manhole pump device, having a simple and inexpensive constitution and capable of controlling generation of scum and also breaking the generated scum.A manhole pump device 10 discharges dirty water flowing into a water storag...  
JP2013194583
To improve measuring accuracy of the output quantity of a liquid-state substance.A liquid feed device is configured to output a liquid-state substance stored in a storage section from an output port. The liquid feed device includes: a li...  
JP2013194603
To provide a forced drainage pump which is easily retro-fitted to an existing drainage apparatus and capable of enhancing the flexibility of construction of a water section facility.A side part space 55 is partitioned into a storage cham...  
JP2013194610
To provide a pump, a pump system, a method of controlling the pump, and a cooling system that prevent an impeller from becoming an obstacle of a flow channel.A pump includes: an impeller for moving fluid; a housing section that is provid...  
JP2013190199
To provide a system and method for controlling characteristics of a solids feed material in a solids feed pump.A system includes a solid feed fuel pump configured to route a solid fuel flow from an inlet to an outlet. The solid feed fuel...  
JP2013185497
To prevent an erroneous determination that a normal electric pump has a fault, by making a diagnosis considering a factor having an effect on fault diagnosis, in a fault diagnosis apparatus for an electric pump.After an electric pump is ...  
JP2013174138
To provide a well water usage measuring apparatus capable of accurately computing the usage of well water by measuring the operating time of a pumping motor in a measuring means that measures the usage of well water by installing a measu...  
JP2013170460
To enable instantaneous changeover from a standby operation to a pumping operation even in the case of uniforming the pumping operation time of pumps by reducing transitional load fluctuation in domestic power generation equipment having...  
JP2013148099
To provide an inexpensive pumping system with a simple structure, configured to reliably supply priming and detect pumped water even if a water pump is used in a tilted state, and to prevent freezing in a priming pipe even if the water p...  
JP2013147986
To provide a pump control system coping with a failure of a power supply system while increasing redundancy by providing a plurality of electric pumps to a fluid passage.A pump control system includes a first electric pump P1 and a secon...  
JP2013130122
To notify a user of a pump operating state by visualizing the state and to perform automatic operation depending on the user's intent.A control part 50 calculates a lifting range of a pump 10 based on an suction port and ejection port of...  
JP2013117195
To provide a water supply system that reduces wasteful operation power by performing pressure control equal to or not lower than direct terminal-end constant pressure control, and is favorable in response.A water supply system comprises:...  
JP2013108446
To provide a pump control method and a control device therefor, capable of striking a balance between reduction in liquid draining time and prevention of cavity generation, while simplifying a structure.A pump control device includes a d...  
JP2013096311
To provide a pump control system capable of maintaining the operation of a plurality of pumps at the optimum efficiency point even if the pump characteristics are degraded with the elapse of time by minimizing energy consumption by opera...  
JP2013087622
To provide a pump capable of stabilizing axial self-oscillation while balancing axial thrust by a simple structure and capable of reducing a leaking flow rate of a slit.The pump includes: a shaft on which an impeller and a pressure sleev...  
JP2013072347
To prevent an operation deviating from an upper or lower limit input/output range and an operation deviating from a proper rotational speed and a proper guide vane opening, by accurately calculating a simulated total pump head or simulat...  
JP2013050023
To provide a booster water supply system for determining the performance of a booster pump in a booster water supply part with respect to each of a low-rise zone, a medium-rise zone and a high-rise zone.The booster water supply system in...  
JP2013047499
To perform pump output regulation simply according to pipe resistance when the pipe resistance is given.A pump device is provided in the middle of a circulation path having predetermined pipe resistance to circulate fluid. The pump devic...  
JP2013040563
To provide a pump drive control device configured to precisely detect the presence of water using a circulation pump of DC drive.This pump drive control device comprises: a circulation pump 14 of DC drive for circulating hot water; and a...  
JP2013040593
To provide a pump system for a cold and hot water circulating and supplying system of using a variable speed pump suitable for automatically generating a parameter and an operation expression required for pump operation control and end p...  
JP2013040596
To provide a pump system in which a plurality of pumps can be driven impartially with a simple constitution.An air vent valve 26 is connected to a suitable portion of a lifting pipe 15 of each of a plurality of pump units 11 and an advan...  
JP2013024073
To provide a water treatment system in which it is not necessary to install a measurement tank or an electromagnetic flowmeter, entire system costs can be reduced, water can be sent from a flow rate adjusting tank to a treatment tank wit...  
JP2013024151
To provide a submersible pump control unit, which is capable of reducing costs required for update facilities by effectively utilizing existing control panel facilities, even if installed outdoors under large effects of temperature/humid...  
JP2013027184
To provide a space-saving pump unit which can perform variable speed operation control by the single pump unit while securely releasing heat.In a pump unit, a pump portion installed in a pump casing and having an impeller and a rotating ...  
JP2013019420
To calculate shaft power and consumption power required when a pump is operated at an optional operating point based on a pump characteristic value indicating the optional operating point.A reference flow rate calculation part 16A calcul...  
JP2013019421
To calculate a characteristic value of a pump with high accuracy without measuring operation characteristic data of the pump in advance.A device for calculating a pump characteristic value includes: a reference operating point identifyin...  
JP2013019422
To calculate a characteristic value of a pump with high accuracy without measuring operation characteristic data of the pump in advance.A device for calculating a pump characteristic value includes: a reference operating point identifyin...  
JP2013011241
To provide a multistage pump with improved tansporting performance.The multistage pump includes a rotating shaft 1, a plurality of impellers 2 fixed at the rotating shaft 1, and a pump casing 3 that accommodates the plurality of impeller...  
JP2013011254
To solve the problem that water inside a pump powered by an internal combustion engine and inside a pipe on the pump side remain in situ until the pump powered by the internal combustion engine is operated and that there is the risk of r...  
JP2012246865
To provide a pump facility of high maintainability, by managing and maintaining the pump facility from a present operation state.This pump facility 10 includes: a main pump 301 for pumping liquid; an auxiliary machine facility 303 includ...  
JP2012246826
To provide water supply equipment that enables easy detection of failure in a backflow prevention valve, includes a plurality of sets of water supply devices each comprising a backflow prevention valve, a pump, etc., and is configured by...  
JP2012241614
To provide a water supply device using a variable speed pump suitable for a terminal pressure constant control system without the need for concerning about an overload or overcurrent, and not requiring any special preliminary considerati...  
JP2012241567
To issue a warning of a pump failure due to cavitation or leakage of a pump device which sucks a fluid from a suction port and discharges the fluid from a discharge port without storing the fluid in a pressure tank.The pump device includ...  
JP2012229699
To provide a method for starting a water supply system that can eliminate a lack of water supply pressure caused in such a case as when flush valves for flushing toilets in facilities such as a school are used simultaneously.The water su...  
JP2012225255
To provide a water supply system capable of continuing the water supply without suspending the operations of pumps even if transmission faults take place between a plurality of inverter control sections and a control section that issue s...  
JP2012219764
To improve the reliability of a water supply device by stopping a pump even when the pressure on the discharge side of the pump is not increased due to clogging of a constant pressure valve with a foreign matter or the like.The water sup...  
JP2012219721
To provide a fluid flowing device inhibiting the deterioration of pump efficiency and inhibiting the occurrence of a pump lock state by magnetic foreign matters.To solve the problem, in the fluid flowing device including a pump 2 for cau...  
JP2012216133
To provide a liquid level control device and a liquid level control method capable of performing liquid level control with higher accuracy and reducing a useless adjustment.A liquid level control device 1 comprises: a container 20 where ...  
JP2012215176
To eliminate the work for causing start timing of one submersible pump 1A to be different from that of another submersible pump 1B and to reliably perform automatic alternate operations of the two submersible pumps 1, when installing the...  
JP2012215101
To improve pump efficiency by reducing unnecessary energy with a simple structure and a simple control.The pump includes a rotary drive shaft 5 provided inside a pump casing 3 having a fluid suction opening on one end side and a fluid ej...  

Matches 451 - 500 out of 3,457