Patent application number | Description | Published |
20120127766 | CONFIGURABLE HYBRID CONVERTER CIRCUIT - A circuit for a hybrid voltage source converter suitable for high voltage DC power transmission and reactive power compensation. The circuit comprises an assembly of electrically interconnected elements (Elements | 05-24-2012 |
20120182771 | CONVERTER WITH ACTIVE FAULT CURRENT LIMITATION - A voltage source converter for high voltage DC power transmission is disclosed. According to one aspect, the voltage source converter is connectable between a DC network and another electrical network to interconnect the DC network and the other electrical network. The voltage source converter includes a converter unit configured to convert power flowing between the DC network and the other electrical network and at least one fault unit. One or more of the fault units includes at least one fault module having a voltage source that is operable, in the event of a short circuit in a DC network connected to the voltage source converter, to produce a voltage that acts to reduce current flowing through the voltage source converter and the short circuit. | 07-19-2012 |
20150116881 | HIGH VOLTAGE DC CIRCUIT BREAKER APPARATUS - A circuit breaker apparatus for use in high voltage direct current (HVDC) power transmission is provided. The circuit breaker apparatus has one module or a plurality of series-connected modules, the or each module including: first, second, third and fourth conduction paths and first and second terminals for connection to an electrical network, each conduction path extending between the first and second terminals, the first conduction path including a mechanical switching element, the second conduction path including at least one semiconductor switching element, the third conduction path including a snubber circuit having an energy storage device and the fourth conduction path including a resistive element. | 04-30-2015 |
20150131189 | COMPOSITE HIGH VOLTAGE DC CIRCUIT BREAKER - A circuit breaker for high voltage direct current (HVDC) power transmission includes a module with a pair of terminals for connection to an electrical network, and four of conduction paths. Each first conduction path includes a mechanical switch connected in series with at least one first semiconductor switch to selectively allow current to flow between the first and second terminals through the first conduction path in a first mode of operation or commutate current from the first conduction path to the second conduction path in a second mode of operation. The second conduction path also has a semiconductor switch to selectively allow current to flow between the terminals through the second conduction path or commutate current from the second conduction path to the third conduction path in the second mode of operation. The third conduction path has a snubber circuit with an energy storage device to control a rate of change of voltage across the mechanical switch and oppose current flowing between the first and second terminals in the second mode of operation. The fourth conduction path has a resistive element to absorb and dissipate energy in the second mode of operation and divert charging current from the first and second terminals away from the energy storage device to limit a maximum voltage across the pair of terminals. | 05-14-2015 |
Patent application number | Description | Published |
20090120437 | Flow Generator Message System - A flow generator for delivering breathable gas to a patient includes a processor coupled with operation sensors and a user interface. The processor is programmed to generate at least one of time-based or event-based messages relating to at least one of flow generator operation, flow generator service, flow generator use, patient health, peripheral devices and services, patient treatment, and reminders. Time-based messages are generated at predetermined time intervals based on either time of use or elapsed time. The event-based messages are generated based on signals from the operation sensors. The user interface is configured to deliver the messages to at least one of a display, a flow generator service provider, the patient and a physician. By this system, operation of the flow generator is facilitated and enhanced. | 05-14-2009 |
20090326403 | DISTINGUISHING CLOSED AND OPEN RESPIRATORY AIRWAY APNEAS BY COMPLEX ADMITTANCE VALUES - Methods and apparatus are disclosed for determining the occurrence of a closed or open apnea. Respiratory air flow from a patient is measured to give an air flow signal. The determination of an apnea is performed by applying an oscillatory pressure waveform of known frequency to a patient's airway, calculating a complex quantity representing a patient admittance ( | 12-31-2009 |
20100275918 | CHARACTERISATION OF MASK SYSTEMS - A method and a CPAP apparatus for characterizing a plurality of different mask systems, e.g., masks and hoses, are provided. The CPAP apparatus can be calibrated for different mask systems and hoses by including sensors configured to measure flow and pressure at a flow generator of the CPAP apparatus. When the flow generator is fitted to a new mask system, or any changes are made to an existing mask system, mask or patient interface and/or hose, a method for calibrating the flow generator for the new mask system, mask and/or hose is provided. The method includes determining air flow characteristics using flow measurements made during a first test period when the flow through the mask system is open, measuring or estimating pressure in the mask system during a second test period when the flow through the mask system is blocked and determining air flow characteristics of the diffuser of the mask system using the air flow characteristics of the air delivery hose determined during the first test period and the pressure measurements made during the second test period. | 11-04-2010 |
20110139154 | IDENTIFICATION SYSTEM AND METHOD FOR MASK AND VENTILATOR COMPONENTS - Components of a CPAP or other patient ventilation apparatus have a remotely-readable identification tag encoded with component identification. data. The flow generator controller is programmed to receive data derived from the identification tag from a tag reader, and to adapt functions of the flow controller to coordinate with the component. | 06-16-2011 |
20120090610 | CHARACTERISATION OF MASK SYSTEMS - A method and CPAP apparatus characterizes different mask systems, e.g., masks and hoses. The CPAP apparatus can be calibrated for different mask systems and hoses by including sensors that measure flow and pressure at a flow generator of the apparatus. When the generator is fitted to a new mask system, or any changes are made to an existing one, a method calibrates the generator for the mask system. The method includes determining air flow characteristics using flow measurements from a first test period when flow through the mask system is open, measuring or estimating pressure in the mask system during a second test period when flow through the mask system is blocked and determining air flow characteristics of the diffuser of the mask system using the air flow characteristics of the air delivery hose determined during the first period and the pressure measurements made during the second period. | 04-19-2012 |
20130206143 | FLOW GENERATOR MESSAGE SYSTEM - A flow generator for delivering breathable gas to a patient includes a processor coupled with operation sensors and a user interface. The processor is programmed to generate at least one of time-based or event-based messages relating to at least one of flow generator operation, flow generator service, flow generator use, patient health, peripheral devices and services, patient treatment, and reminders. Time-based messages are generated at predetermined time intervals based on either time of use or elapsed time. The event-based messages are generated based on signals from the operation sensors. The user interface is configured to deliver the messages to at least one of a display, a flow generator service provider, the patient and a physician. By this system, operation of the flow generator is facilitated and enhanced. | 08-15-2013 |
Patent application number | Description | Published |
20140116442 | SYSTEMS, METHODS, AND/OR APPARATUSES FOR NON-INVASIVE MONITORING OF RESPIRATORY PARAMETERS IN SLEEP DISORDERED BREATHING - In certain example embodiments, an air delivery system includes a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment and a pulse oximeter. In certain example embodiments, the pulse oximeter is configured to determine, for example, a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator. Oximeter plethysmogram data may be used, for example, to determine estimated breath phase; sleep structure information; autonomic improvement in response to therapy; information relating to relative breathing effort, breathing frequency, and/or breathing phase; vasoconstrictive response, etc. Such data may be useful in diagnostic systems. | 05-01-2014 |
20150196725 | FLOW GENERATOR MESSAGE SYSTEM - A flow generator for delivering breathable gas to a patient includes a processor coupled with operation sensors and a user interface. The processor is programmed to generate at least one of time-based or event-based messages relating to at least one of flow generator operation, flow generator service, flow generator use, patient health, peripheral devices and services, patient treatment, and reminders. Time-based messages are generated at predetermined time intervals based on either time of use or elapsed time. The event-based messages are generated based on signals from the operation sensors. The user interface is configured to deliver the messages to at least one of a display, a flow generator service provider, the patient and a physician. By this system, operation of the flow generator is facilitated and enhanced. | 07-16-2015 |
Patent application number | Description | Published |
20100016694 | Systems, Methods, and/or Apparatuses for Non-Invasive Monitoring of Respiratory Parameters in Sleep Disordered Breathing - In certain example embodiments, an air delivery system includes a controllable flow generator operable to generate a supply of pressurized breathable gas to be provided to a patient for treatment and a pulse oximeter. In certain example embodiments, the pulse oximeter is configured to determine, for example, a measure of patient effort during a treatment period and provide a patient effort signal for input to control operation of the flow generator. Oximeter plethysmogram data may be used, for example, to determine estimated breath phase; sleep structure information; autonomic improvement in response to therapy; information relating to relative breathing effort, breathing frequency, and/or breathing phase; vasoconstrictive response, etc. Such data may be useful in diagnostic systems. | 01-21-2010 |
20110155133 | Mask Pressure Regulation in Cpap Treatment and Assisted Respiration by Dynamic Control of Mask Vent Flow - An air delivery system includes an air flow generator to provide a pressurized flow of air, a patient interface to provide a seal with the patient's face in use, an air delivery conduit to interconnect the air flow generator and the patient interface, and a controllable vent valve to control venting from the patient interface. The vent valve is controlled to maintain a substantially constant air flow in the air delivery conduit and the air flow generator. | 06-30-2011 |
20110162647 | POWER MANAGEMENT IN RESPIRATORY TREATMENT APPARATUS - A respiratory treatment apparatus provides respiratory treatment with improved power management control to permit more efficient power consumption and power supply units, such as battery powered operation. In one embodiment, power management prioritizes the flow generator ( | 07-07-2011 |
Patent application number | Description | Published |
20090157619 | SYSTEM AND METHOD FOR CREATING A DATABASE - A method of creating a database comprises receiving a document file such as a curriculum vitae or a job advertisement, performing semantic extraction on the document file, extracting a plurality of components from the document file, accessing a data matrix, the data matrix defining a plurality of standardised entries, translating each extracted component into a standardised entry from the data matrix, and storing the translated standardised entries in a data file. | 06-18-2009 |
20090249183 | SYSTEM AND METHOD FOR PROCESSING A TEXT FILE - A system and method for processing a text file includes receiving a text file, extracting one or more components from the text file, populating a predefined form with the extracted components, displaying the populated form, and receiving a user input approving the displayed form. The receiving of the text file may include receiving a predefined user input, copying the text file to a predefined location and displaying a graphical user interface, the graphical user interface including the predefined location. | 10-01-2009 |