XYLEM IP HOLDINGS LLC Patent applications |
Patent application number | Title | Published |
20150108938 | ENGINE CONTROL FOR A SYNCHRONOUS MOTOR - The invention relates to an engine control for a synchronous motor having a number of N stator coils set off in regard to each other, which are arranged around a rotor of the synchronous motor, wherein there may be impressed upon the stator coils by the engine control a coil voltage and wherein there is formed a coil current having a direct current component in a co-ordinate system rotating proportionally with the number of revolutions performed by the synchronous motor as well as a cross current component, wherein the cross current component effects a tangential force activating the rotor in the direction of rotation and wherein the direct current component effects a force acting perpendicularly to the rotor surface on the rotor, wherein the engine control has a direct current generator for generating a direct current component periodically alternating in the rotating co-ordinate system, in order to neutralise oscillations of the synchronous motor activated by the engine control by means of the force generated perpendicularly to the rotor surface, wherein the direct current generator is formed for evaluating at least one angle information and an operating cross current. | 04-23-2015 |
20140314633 | LIGHTWEIGHT, INTRINSICALLY SAFE OZONE ELECTRODE - An electrode arrangement for an ozone generator includes a tubular dielectric which concentrically encloses a rod at a distance therefrom, and a filler material provided in an interstice between the tubular dielectric and the rod. | 10-23-2014 |
20140134005 | METHOD FOR CONTROLLING A PUMP - A method for automatic mutual alternation between an arbitrary number of pumps by the control of each individual pump, which makes use of a start condition for a state change from an inactive state of the pump into an active state of the pump to be performed, as well as makes use of a stop condition for a state change from the active state into the inactive state to be performed. The method includes a sub method (Find start condition) that includes the step of, after a predetermined stage, arbitrarily changing the start condition of the individual pump within predetermined limits. | 05-15-2014 |
20140119953 | METHOD FOR CONTROLLING AT LEAST A PART OF A PUMP STATION - A method for controlling at least a part of a pump station including a number of speed controlled pumps, the method is arranged to minimize the specific energy consumption E | 05-01-2014 |
20140116961 | CONTROL DEVICE FOR A UV-DISINFECTING SYSTEM WITH BROADBAND UV EMITTERS - A device for monitoring and controlling water disinfecting systems having at least one broadband UV emitter arranged in a channel, wherein the device has at least one sensor, which is arranged in the water at a distance from the broadband UV emitter, and wherein the sensor is connected to a control unit, which is set up to control the output of the broadband UV emitter or the volumetric flow of water through the channel, wherein the sensor has a maximum sensitivity to UV radiation in a wavelength range between 200 nm and 240 nm. | 05-01-2014 |
20140048961 | DIFFUSOR AND DIFFUSOR UNIT FOR DIFFUSING A GAS INTO A LIQUID - A diffusor for diffusing a gas into a liquid including a membrane, a supporting structure supporting the membrane and a holder arranged to connect the supporting structure to a gas supply conduit, at least a part of the membrane being perforated. The membrane defines an inner chamber, and at least a part of the supporting structure is arranged in the inner chamber of the membrane, the supporting structure including at least one channel extending from an inlet opening that is in, direct or indirect, fluid communication with the gas supply conduit to an outlet opening that is in fluid communication with the inner chamber of the membrane. | 02-20-2014 |
20140030130 | SLIDING VANE PUMP - Disclosed herein is a sliding vane pump for providing positive displacement of a fluid such as water. The pump comprises a pump assembly having a housing with a fluid inlet and a fluid outlet formed therein, a lining member received in the housing and defining a substantially cylindrical inner surface and a rotor arranged inside the lining member to rotate about a rotational axis. The rotor defines a substantially cylindrical outer surface such that the inner surface of the lining member and the outer surface of the rotor define a working space therebetween, the working space having a radial cross-sectional area which varies about the rotational axis. The pump assembly also comprises a plurality of vanes received in substantially radial slots formed about the outer surface of the rotor. Each of the vanes is arranged to slide in the radial direction with respect to the rotor such that an outer edge of the vane contacts the inner surface of the lining member, thereby dividing the working space into working chambers. In use, rotation of the rotor draws the fluid from the fluid inlet into the working chambers and ejects the fluid from the working chambers into the fluid outlet. The vanes are formed of a carbon graphite or ceramic material and the rotor is formed of a ceramic material, which provides reduced thermal expansion compared to convention materials such as stainless steels. A base portion of each of the slots of the rotor is enlarged and has a rounded cross-sectional shape. The pump assembly further comprises a strainer assembly received into an opening in the housing and extending across the fluid inlet for filtering particulate matter from the fluid. The strainer assembly comprises a thermal sensor for sensing a temperature of fluid passing through the fluid inlet. | 01-30-2014 |
20130330243 | LIGHTWEIGHT, INTRINSICALLY SAFE OZONE ELECTRODE - An electrode arrangement for an ozone generator with a tubular outer electrode, which concentrically encloses a tubular dielectric at a distance therefrom, wherein the dielectric concentrically encloses a rod at a distance therefrom and wherein a filler material is provided in the interstice between the outer electrode and the dielectric and another filler material is provided in the interstice between the dielectric and the rod, wherein the rod is an insulator. | 12-12-2013 |
20130320233 | FLOW RECTIFIER FOR CLOSED PIPELINES - A channel for a UV irradiation device, in which the UV irradiation device is disposed in a closed channel and an inlet cone is provided in the direction of flow upstream of a UV reactor, which, as part of the wall of the channel, increases the cross section of the channel from an incoming pipeline cross section to a cross section of the reactor, in which a flow rectifier with at least one inner first guide element and at least one outer second guide element is disposed in the inlet cone, wherein the inner guide element is a substantially circular, cylindrical pipe and the outer guide element runs substantially parallel to the outer wall and is disposed at a distance from the outer wall. | 12-05-2013 |
20130279891 | WATER DELIVERY SYSTEM AND METHOD FOR MAKING HOT WATER AVAILABLE IN A DOMESTIC HOT WATER INSTALLATION - A water delivery system is provided, comprising at least one faucet device with a cold water faucet part and a hot water faucet part, a cold water line to the at least one faucet device, a tankless heater device for heating water, a hot water line having a first portion running from an outlet of the tankless heater device to the at least one faucet device and having a second portion running from the at least one faucet device to an inlet of the tankless heater device, and a circulatory pump arranged in the second portion of the hot water line, wherein the circulatory pump has a prefixed first performance level and a prefixed second performance level, wherein the first performance level causes a finite water flow in the hot water line which is below an operation threshold value of the tankless heater device. | 10-24-2013 |
20130264292 | DEVICE AND METHOD FOR TREATING LIQUIDS BY MEANS OF OZONE - A device and a method for treating liquids by ozone, including a pipe in which a main flow of the liquid is guided in a flow direction from an inlet to an outlet, an ozone feed point at which ozone can be introduced in gas form into the main flow, and at least two mixers which are located downstream of the ozone feed point, wherein the mixers are arranged at a distance from one another, and wherein at least one reaction zone is formed between the mixers, and wherein the mixers are designed in such a way that they each dissolve only a portion of the ozone in the main flow that has been introduced in gas form. | 10-10-2013 |
20130082464 | SUCTION CONNECTION FOR CONNECTING A SUCTION PIPE TO A DRY INSTALLED CENTRIFUGAL PUMP - A suction connection, including a first flange that includes a centrally located through hole and is arranged to be connected to an outlet of a suction pipe and a second flange that includes a centrally located through hole and that is arranged to be connected to an inlet of a dry installed centrifugal pump. The suction connection includes a first pipe socket, which is displacable in the axial direction between an operative position in which said first pipe socket disengageably connects the first flange and the second flange and thereby puts the through hole of the first flange in fluid communication with the through hole of the second flange, and a service position in which the first pipe socket is located at a distance from the second flange and thereby admit access to the through hole of the second flange. | 04-04-2013 |
20130052060 | RECHARGEABLE BATTERY POWERED UTILITY PUMP WITH SERIES CENTRIFUGAL PUMP CONFIGURATION - A utility pump is provided featuring a housing and battery configuration, where the housing is configured with a series configuration of integral pumps, and also configured with a battery receiving portion having electrical terminals for receiving power for providing to the series configuration of the integral pumps, and where the battery has a protruding portion with corresponding electrical terminals configured to contact the electrical terminals to provide power to the series configuration of the integral pumps when the protruding portion of the battery is inserted into the battery receiving portion of the housing and rotated in one direction to an “ON” position, and also configured not to contact the electrical terminals when the battery is not rotated to the “ON” position. | 02-28-2013 |
20130003495 | PROPELLER ASSEMBLY COMPRISING ONE HUB AND AT LEAST TWO BLADES - The inventions refer to a mixer assembly for generating and maintaining a movement within waste water, comprising a hub ( | 01-03-2013 |
20120217420 | UV DISINFECTION SYSTEM FOR WASTE WATER AND DRINKING WATER INCLUDING A CLEANING DEVICE - A UV disinfection system for waste water and drinking water, includes a number of UV radiators arranged in cladding tubes, the cladding tubes being configured essentially symmetrically to a longitudinal axis, as well as a cleaning device for the cladding tubes. The cleaning device includes at least one cleaning ring for each cladding tube, which surrounds the cladding tube, the at least one cleaning ring having a scraper ring resting against the cladding tube, at least one drive for driving the cleaning ring in the direction of the longitudinal axis, and supply provisions for supplying pressurised fluid under elevated pressure from a pressure source to the scraper ring are provided, wherein pressure may be applied onto the scraper ring from the pressure source in the direction of the cladding tube. | 08-30-2012 |
20120216843 | UV DISINFECTION SYSTEM WITH CONTACTLESS CLEANING - A UV disinfection system for waste water and drinking water, including a number of UV radiators arranged in cladding tubes and a cleaning device for the cladding tubes. The cladding tubes are configured essentially symmetrically to a longitudinal axis. The cleaning device for the cladding tubes includes (a) at least one cleaning ring for each cladding tube, which surround the cladding tube, (b) at least one drive for driving the cleaning ring in the direction of the axis, wherein the at least one cleaning ring is disposed at a distance (d) from the surface of the cladding tube, (c) openings directed in the cleaning ring towards the cladding tube, and (d) a supply of pressurised liquid under high pressure into the openings so that the pressurised liquid is directed as a cleaning jet onto the surface of the cladding tube. | 08-30-2012 |