Patents by Inventor Ralf Lorenzen
Ralf Lorenzen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8707951Abstract: A process for controlling a respirator with reduced gas excess, wherein a load situation (37) of an expiration valve is polled in a continuous sequence and a flow value (36) is reduced step by step from a preset starting flow value (41) and wherein the flow value (36) is again increased when a predetermined value (44) is exceeded.Type: GrantFiled: January 14, 2010Date of Patent: April 29, 2014Assignee: Dräger Medical GmbHInventors: Ralf Lorenzen, Hans-Joachim Kohl, Tobias Glaw, Tilman von Blumenthal
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Patent number: 8047205Abstract: A gas-mixing device for respirators can be used both in stationary operation and in mobile operation. The gas-mixing device has a storage tank (5), into which compressed air and oxygen can be introduced by dispensing valves (3, 8). In addition, a blower (10), which draws in gas from the environment (11), is connected to the storage tank (5). To dispense gas from the pressurized gas sources (4, 6) by means of the dispensing valves (3, 8), a first operating pressure level is set in the storage tank (5). When changing over to the blower operation, the operating pressure level is lowered to a pressure level adapted to the maximum respiration pressure.Type: GrantFiled: November 8, 2007Date of Patent: November 1, 2011Assignee: Dräger Medical GmbHInventors: Tilman von Blumenthal, Judith Löser, Ralf Lorenzen, Bernhard Ludwig, Frank Oelgarth
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Patent number: 7815166Abstract: An electrodynamic drive of a compact design is provided, particularly for a respiration system dispensing valve. The electrodynamic drive has a velocity measuring system that is uncoupled from the electrodynamic drive. The velocity measuring system is provided directly above a moving coil system, wherein the velocity measuring system has a short-circuit sleeve (15) for forming a separate magnetic circuit (221).Type: GrantFiled: February 5, 2008Date of Patent: October 19, 2010Assignee: Dräger Medical AG & Co. KGInventors: Karsten Hoffmann, Ralf Lorenzen
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Publication number: 20100224189Abstract: A process for controlling a respirator with reduced gas excess, wherein a load situation (37) of an expiration valve is polled in a continuous sequence and a flow value (36) is reduced step by step from a preset starting flow value (41) and wherein the flow value (36) is again increased when a predetermined value (44) is exceeded.Type: ApplicationFiled: January 14, 2010Publication date: September 9, 2010Applicant: Drager Medical AG & Co. KGInventors: Ralf LORENZEN, Hans-Joachim KOHL, Tobias GLAW, Tilman von BLUMENTHAL
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Patent number: 7708015Abstract: A process, system and device are provided for automatically recording pressure-vs.-volume curves during artificial respiration with a respirator. The inspiration pressure is increased during the supply of a breathing gas volume flow under the control of a control unit. The resulting breathing gas volume flow rate is detected and the volume is determined from the latter by integration. The control unit compares the breathing gas volume flow detected during the phase of expiration with a preselected set point and acts on an expiration valve (12) in the expiration line (8) by means of a controller in case of deviation from the set point in order to return the breathing gas volume flow to the set point.Type: GrantFiled: June 28, 2005Date of Patent: May 4, 2010Assignee: Dräger Medical AG & Co. KGInventors: Dieter Seeger, Ralf Lorenzen, Hans-Joachim Kohl
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Publication number: 20080245367Abstract: An electrodynamic drive of a compact design is provided, particularly for a respiration system dispensing valve. The electrodynamic drive has a velocity measuring system that is uncoupled from the electrodynamic drive. The velocity measuring system is provided directly above a moving coil system, wherein the velocity measuring system has a short-circuit sleeve (15) for forming a separate magnetic circuit (221).Type: ApplicationFiled: February 5, 2008Publication date: October 9, 2008Applicant: DRÄGER MEDICAL AG & CO. KGInventors: Karsten HOFFMANN, Ralf LORENZEN
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Publication number: 20080121233Abstract: A gas-mixing device for respirators can be used both in stationary operation and in mobile operation. The gas-mixing device has a storage tank (5), into which compressed air and oxygen can be introduced by dispensing valves (3, 8). In addition, a blower (10), which draws in gas from the environment (11), is connected to the storage tank (5). To dispense gas from the pressurized gas sources (4, 6) by means of the dispensing valves (3, 8), a first operating pressure level is set in the storage tank (5). When changing over to the blower operation, the operating pressure level is lowered to a pressure level adapted to the maximum respiration pressure.Type: ApplicationFiled: November 8, 2007Publication date: May 29, 2008Applicant: Drager Medical AG & Co. KGInventors: Tilman von Blumenthal, Judith Loser, Ralf Lorenzen, Bernhard Ludwig, Frank Oelgarth
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Publication number: 20060037616Abstract: A process, system and device are provided for automatically recording pressure-vs.-volume curves during artificial respiration with a respirator. The inspiration pressure is increased during the supply of a breathing gas volume flow under the control of a control unit. The resulting breathing gas volume flow rate is detected and the volume is determined from the latter by integration. The control unit compares the breathing gas volume flow detected during the phase of expiration with a preselected set point and acts on an expiration valve (12) in the expiration line (8) by means of a controller in case of deviation from the set point in order to return the breathing gas volume flow to the set point.Type: ApplicationFiled: June 28, 2005Publication date: February 23, 2006Applicant: Drager Medical AG & Co. KgaAInventors: Dieter Seeger, Ralf Lorenzen, Hans-Joachim Kohl
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Patent number: 6729343Abstract: A valve arrangement is provided with a very short minimum valve adjustment time. This is especially suitable for use in respirators or anesthesia apparatuses for metering gases for respirated patients. It has a valve (3, 4) with a seat (3) and with a valve closing part (4) for adjusting the gas flow rate, an inflow line (1) and a discharge line (2) as well as a drive system (5) for controlling the position of the valve closing part (4) relative to the seat (3). A gas flow rate measuring transducer (8) and a control unit (9) are provided for controlling the drive system (5) by means of a control signal. A velocity measuring transducer (7) for measuring the velocity of the valve closing means (4) relative to the seat (3) is present to provide an output signal used to calculate the control signal (40) for the drive system (5).Type: GrantFiled: March 18, 2002Date of Patent: May 4, 2004Assignee: Dräger Medical AG & Co. KGaAInventors: Bernhard Ludwig, Tilmann von Blumenthal, Ralf Lorenzen
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Publication number: 20020179147Abstract: A valve arrangement is provided with a very short minimum valve adjustment time. This is especially suitable for use in respirators or anesthesia apparatuses for metering gases for respirated patients. It has a valve (3, 4) with a seat (3) and with a valve closing part (4) for adjusting the gas flow rate, an inflow line (1) and a discharge line (2) as well as a drive system (5) for controlling the position of the valve closing part (4) relative to the seat (3). A gas flow rate measuring transducer (8) and a control unit (9) are provided for controlling the drive system (5) by means of a control signal. A velocity measuring transducer (7) for measuring the velocity of the valve closing means (4) relative to the seat (3) is present to provide an output signal used to calculate the control signal (40) for the drive system (5).Type: ApplicationFiled: March 18, 2002Publication date: December 5, 2002Inventors: Bernhard Ludwig, Tilmann von Blumenthal, Ralf Lorenzen