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WO/1997/006433A1 |
In order to determine the nature of fluid passing through a pipe (6), for example whether material being pumped through a pipe is sludge or liquid phase, high frequency ultrasonic pulses from a generator (16) are caused to propagate arou...
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WO/1997/005393A1 |
A peripheral pump for feeding fuel from the tank to the internal combustion engine of a motor vehicle has a rotary, circular cylindrical running wheel (12) arranged in a pump chamber (17) formed by at least two adjacent walls (18, 19). F...
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WO/1996/034206A1 |
A safety pumping system including a pump (19) and an electric motor (15) is adapted to be immersed in a fluid (11) contained in a tank (10). The electric motor and the pump are interconnected by a driving shaft (23). The electric motor i...
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WO/1996/023155A1 |
An automatic recirculation valve (10) having a body portion (12), a central hub (60) integral with said body portion (12) and inlet (16), main outlet (18) and recirculation outlets (20). A main valve element (28) responsive to flow from ...
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WO/1996/018821A1 |
The invention pertains to a pump case (1) wherein a replaceable insert (6) is sealingly disposed in a medium-conveying case aperture (7). The insert, which may also be part of a split ring seal, allows different impellers to be used with...
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WO/1996/000853A1 |
The invention concerns a pump-protecting valve (1) having a valve housing (2), a pump connecting sleeve (4), arranged in a main passage direction (3), and a feed-water connecting sleeve (5) opposite the pump connecting sleeve. A non-retu...
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WO/1995/030092A1 |
The invention concerns a self-priming, multi-stage centrifugal pump (6) having a chamber (15) which is disposed externally of the housing (9) accommodating the pump stages (1 to 5), said chamber containing fluid to be delivered. The cham...
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WO/1995/014877A1 |
A mininum output valve has a housing (1) in which a valve seat (8) with a spring-loaded valve body (7) is arranged between an inlet (3) and an outlet (4). The minimum output valve further has a bypass connection (9) in communication with...
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WO/1995/009981A1 |
A soft-start pump controller system (10) for controlling a pump motor includes a switching device for supplying power to the pump motor; a periodic duty cycle generator (18) for periodically actuating the switching device at a fraction o...
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WO/1995/006610A1 |
An improved apparatus (30) for transporting the metering particulate material (40) including a transport duct (36) having an inlet (32), an outlet (34), and at least one moving surface (31) located therebetween having a downstream facing...
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WO/1995/002791A1 |
An integrated wet-rotor zoning circulator for circulating fluid within a zone in a hydronic heating or cooling system. The zoning circulator has three primary components: a motor (100), an impeller casing (300), and a controller (200). T...
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WO/1995/002126A1 |
A controller for controlling at least one pump connected to a supply network wherein the controller can detect a fault in the supply network by comparing the amount of material being delivered along the supply network with an expected am...
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WO/1994/026416A1 |
An integral, readily installed, universal pump assembly (18) has an integral, liquid-tight outer housing (19) for supporting within a single liquid-tight containment vessel an electric motor driven pump (21), and discharging liquid from ...
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WO/1994/010448A1 |
An apparatus for the transporting and slurrying of cuttings from an oil well or drilling rig, the slurry (40) is contained in a vessel (10) and the pump (24) is situated at the lower outlet with its axis of rotation substantially vertica...
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WO/1994/010489A1 |
A method and apparatus for monitoring and analyzing the performance of a recirculation control system are disclosed. According to the invention, the pressure of the liquid passing through the control system is measured directly by pressu...
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WO/1994/010449A1 |
In the state of the art, sludgers for pumping visquous fluids in which a lower viscosity solvent liquid is added to the fluid are filled with the visquous fluid when they are sunk into the borehole. In order to start the sludger, therefo...
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WO/1994/007032A1 |
A pump protecting slide valve has a housing (1) with an inlet (1A) at the side of the feed pump, an outlet (1B) at the side of the useful current and a bypass opening (Ac) at the side of the secondary current. A spindle (6A) is slidably ...
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WO/1994/004789A1 |
A pump system is disclosed for downhole use. The pump system comprises a first pump (16) and a second pump (46) in end to end relationship and the pumps are remotely and independently actuable.
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WO/1993/014450A1 |
A device is disclosed for regulating the flow rate of a fluid circulated in a closed network of pipes by a centrifugal pump, in particular for regulating the circulation of water in a heating system. In order to adapt the regulator to th...
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WO/1993/011360A1 |
A centrifugal pump having a diffuser (1) engaging with a rotor (25), a suction body (2) and a delivery body (3) fixed to the upstream and the downstream ends (1a, 1b) of the diffuser respectively and provided with corresponding suction a...
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WO/1993/001538A1 |
A recirculation valve (10) for cooling a centrifugal pump. The invention comprises a valve casing having a first chamber (14) for connection to a centrifugal pump and a second chamber (16) for connection to a fluid outlet, a recirculatio...
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WO/1992/022764A1 |
A method and apparatus for monitoring the performance of a recirculation control system are disclosed. According to the invention, the pressure of the liquid passing through the control system is measured directly by pressure and differe...
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WO/1992/018775A1 |
The multi-stage rotary pump proposed has a first normally priming rotary-pump stage and subsequent self-priming stages. In order to improve the self-priming capability and waste-escape security of the pump, in particular when fluids are ...
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WO/1992/015784A1 |
A water flow system for collecting and discharging waste water, storm water and the like includes a water pumping station into which water is delivered through an inflow main (16) and from which water is pumped through a water discharge ...
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WO/1992/011150A1 |
Said device is comprised of an adressing chamber CD which houses two membranes (M1,M2/ M3,M4/ M5,M6/ M7,M8) of high flexibility which may be provided with means for compensating the loss of elasticity. In the absence of washing liquid pr...
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WO/1992/008627A1 |
The disclosed pump is comprised of a shell (E) coupled to a container (DP) of washing liquid (L), the shell (E) being formed by a body (CB) and by a lid (TC) coupled to each other. The body (CB) forms a tubular section extension (1), a c...
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WO/1992/006302A1 |
A pump (10) comprises a hollow cylindrical body (12) open at one end. A central hole (14) is provided through the closed end of the body (12) with a perimeter wall (16) around the hole (14) of the same height as the boundary wall (18) of...
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WO/1992/005402A1 |
An apparatus for measuring change of position of a rotor in a drive system comprising a drive rotor and a driven rotor generally concentrically mounted with respect to the drive rotor, the drive and driven rotors being magnetically coupl...
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WO/1992/003229A1 |
A method of separating an aqueous solids containing suspension includes (a) subjecting a first solids containing suspension to centrifugal forces so as to separate the suspension into a first gas containing flow, a second gas-free flow a...
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WO/1992/001296A1 |
A method and system (10) for controlling nuclear reactivity in a nuclear reactor are disclosed. The method includes maintaining a nuclear poison solution at an initial poison pressure (P1) less than the steam pressure within the reactor ...
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WO/1992/001290A1 |
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...
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WO/1992/001295A1 |
The wetwell space in a suppression pool (26) of a nuclear reactor containment is continuously ventilated by exhausting gas therefrom, while at the same time, during normal system operation atmospheric air from a source of same is admitte...
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WO/1992/001299A1 |
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...
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WO/1992/001297A1 |
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...
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WO/1992/001292A1 |
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...
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WO/1992/001298A1 |
A recirculation system (10) is disclosed for driving reactor coolant water (114), contained in an annular downcomer (118) defined between a reactor vessel and a reactor core spaced radially inwardly therefrom. The system includes a plura...
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WO/1992/001291A1 |
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...
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WO/1992/001293A1 |
A recirculation system (10) is disclosed for driving reactor coolant water in an annular downcomer (118) defined between a reactor vessel and a core shroud (12) spaced radially inwardly therefrom. The system supplies feedwater to the ves...
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WO/1992/001289A1 |
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...
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WO/1992/001294A1 |
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...
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WO/1991/019170A1 |
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...
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WO/1991/016541A1 |
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...
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WO/1991/004099A1 |
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...
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WO/1991/002659A1 |
A device is disclosed for heating the seating compartment (10) of a motor vehicle. The heating compartment has a heating circuit connected to a coolant circuit (14) of the internal combustion engine (16). A feed pump (32) arranged in the...
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WO/1990/015252A1 |
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...
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WO/1990/015251A1 |
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...
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WO/1990/013460A1 |
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 (...
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WO/1988/007126A1 |
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...
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WO/1988/002831A1 |
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...
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WO/1986/001861A1 |
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...
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