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Patent Searching and Data


Matches 451 - 500 out of 3,489

Document Document Title
WO/1992/001299
Fuel bundles of a boiling-water nuclear reactor are inverted during refueling methods. Bundles burned in a first orientation are subjected to greater burnup near their bottoms and greater conversion of fertile fuel to fissile fuel near t...  
WO/1992/001289
A reactor core (104) includes upper and lower matrices of fuel bundles. Fuel rods in the upper matrix (126) have their plenums oriented upward, while fuel rods in the lower matrix (124) have their plenums oriented downward. Refueling inv...  
WO/1992/001297
A boiling water nuclear power plant (100) includes a reactor core isolation cooling (RCIC) system in which a turbine (146) used to pump feedwater to the reactor also drives a generator (200). The generator (200) is used to drive RCIC com...  
WO/1992/001291
A reactivity control system includes a reservoir (42) containing a liquid nuclear poison (44), at least one stationary, hollow control blade (32) extending vertically into a reactor core (14), and a poison conduit (52) disposed in flow c...  
WO/1992/001292
A drive (10) for positioning a control rod (12) in nuclear reactor core (104) is disclosed. The drive includes a turbine rotor (34) joined to hollow spindle (26) in a housing. The spindle has a piston (82) disposed therein and a piston r...  
WO/1992/001290
In accordance with the present invention, a nuclear reactor (100) with a recirculating heat transfer fluid has a bi-level core which provides enhanced flexibility in fuel arrangement. The bi-level core (104) includes two sets of fuel uni...  
WO/1992/001294
A drive (10) for positioning a control rod (12) in a nuclear reactor is disclosed. The drive (10) includes a housing (112) having a piston disposed therein, with a piston rod extending from the piston and through the housing for being jo...  
WO/1991/019170
A detector for detecting flow of fluid (4) having a heater (1) operable to transfer thermal energy (6) to a body of fluid (5) with which the detector is associated and first (2) and second (3) temperature sensors each of which is operabl...  
WO/1991/016541
The pump (P) includes a discharge head (34) having a pair of axially spaced end walls (56, 58). A tank (12) includes a housing (52) in communication with a liquid outlet conduit and forms part of a substantially permanently stationary pi...  
WO/1991/004099
An anti-flooding sewage grinder pump liquid level control system in a separately mounted canister is provided for installation within and controlling operation of a sewage grinder pump installed within a sewage collection tank (11). With...  
WO/1990/015251
The present invention relates to a method and apparatus for controlling the operation of a centrifugal pump. The method and apparatus in accordance with the present invention is especially developed for eliminating or minizing the proble...  
WO/1990/015252
A low pressure recirculation valve for cooling a centrifugal pump. A valve casing (12) having a first chamber (14) with an inlet (18) and a recirculation port (22), and a second chamber (16) with an outlet (20). A multiple piece check va...  
WO/1990/013460
A double-acting pump has two outlet channels (47, 48), which can be selectively charged with liquid in function of the direction of rotation, and two movable sealing membranes (36, 37) each of which is associated with an outlet channel (...  
WO/1988/007126
A drive assembly brake (80) is mounted in the gearbox (22) connecting a motor driven input shaft (24) to an output shaft (26), the output shaft being connected by a tubing string (10) to a submersed rotary pump. The gearbox includes an o...  
WO/1988/002831
Automatic recirculation valve for use in installations where a minimum flow is required for protecting such as centrifugal pumps. The valve includes a valve housing (13) with a plunger (12) controlled by a main flow and a spring (2). The...  
WO/1986/001861
Closed piping systems for liquids require pressure maintaining arrangements to define the level of pressure in the piping system in relation to the surrounding atmosphere. Various values of heights of delivery along the piping system are...  
WO/1985/001087
In a float switch, which is provided particularly for immersion pump systems with an electric motor connectable and disconnectable as a function of the level and with a pump coupled thereto and immersed into the liquid to be discharged a...  
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...  
JP2014095354
To provide a pump system that can detect backflow of liquid flowing in a pump pipe without providing a backflow detector in the pump pipe.A pump system comprises: a plurality of pump units 2A, 2B, and 3C each including a pump P and a mot...  
JP2014080874
To suppress the heat generation of a bearing due to flow rate deterioration by stopping rotations of a rotor, when pump efficiency is deteriorated.A control portion 7 for controlling feeding voltage to a stator 5 so as to keep a predeter...  
JP2014080950
To provide a low cost water supply system in which a water supply device have functions for specifying a pressure desired value, an initial time inverter frequency (a desired flow rate) and a required number of pumps and a useless operat...  
JP2014074362
To remove floating contaminant in self-priming pump through repetitive withdrawal operation.A self-priming pump system 1 comprises a lift pump 11 for sucking up sewage water W1, self-priming tank 13 for performing gas-liquid separation o...  
JP2014062505
To provide a water supply device in which starting frequencies of pumps are managed to a prescribed value, and a wasteful operation is excluded while equalizing operation loads in operating the plurality of pumps.A water supply device in...  
JP2014055532
To provide a water supply device capable of managing a starting frequency of a pump to a prescribed value, and excluding a wasteful operation while equalizing operation loads in operating a plurality of pumps.A water supply device in whi...  
JP2014043838
To provide a feed-water pump and a full water level detecting method of the feed-water pump capable of properly judging whether an internal part of a pump body arrives at a full water level when performing the priming water even in the c...  
JP2014043800
To provide a pump control device in which an additional inverter device can be easily installed at low cost and that can continue pump operation even if a state quantity measuring device such as a pressure sensor fails.A first inverter d...  
JP2014037840
To provide a fire pump device that can work reliably and effectively under disadvantageous conditions when a disaster occurs.A fire pump device comprises: a pump 10 for supplying water to water discharge means 50 provided to a pipe on ea...  
JP2014037807
To provide a double suction volute pump for low-load starting that can start an electric motor by a reduced-voltage starting method.A double suction volute pump for water comprises: an impeller rotating about an axis line; and a casing i...  
JP2014037776
To provide a technique for removing a foreign body caught between an impeller and an inner wall opposed thereto in an electric pump.An electric pump 2 comprises: a motor 10 having a rotor 6 that is axially movable by a predetermined dist...  
JP2014031749
To provide a pump device which makes the output of a high efficiency electric motor equivalent to the output of an existing electric motor by a controller, and which automatically controls to prevent the increase of power consumption, ev...  
JP2014031796
To provide a water supply device that can prevent water hammer from occurring in a case where a pump is activated first after a water supply device stops due to power failure or failure of the water supply device.A water supply device 1 ...  
JP2014020230
To reduce windage loss in a motor unit that includes a plurality of motors and a pump system that includes a plurality of motors.A plurality of pumps (20, 20) is provided such that respective inlets (21) are connected to a common pipe (4...  
JP2014015902
To provide a pump unit capable of ensuring redundancy without using a plurality of pump unit.The pump unit provided in a pipeline for feeding a liquid at a preset unit flow rate, comprises n+1 pumps and a constant flow rate valve. The pu...  
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...  

Matches 451 - 500 out of 3,489