Patents by Inventor Karsten Hoffmann
Karsten Hoffmann 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: 8671941Abstract: A respirator with a breathing gas block (2) and with breathing gas ducts (13, 15, 17) and with a heater has the electric components located outside of the breathing gas-carrying areas. A heated distributor plate is flatly in contact on the underside of the breathing gas block (2) and has heating ribs (21, 22) that are in contact with breathing gas ducts (13, 15) at least in some areas.Type: GrantFiled: November 24, 2010Date of Patent: March 18, 2014Assignee: Dräger Medical GmbHInventors: Ralf Heesch, Karsten Hoffmann, Henryk Schnaars, Ahmet Türker
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Patent number: 8109270Abstract: A dispensing valve with admission pressure compensation and a safety device for maximum pressure limitation of the admission pressure. To accomplish the object, a deformation zone (18), which can be brought into contact with a support surface (14) by the admission pressure by admitting pressure in the direction of a reduction of the active area of the compensating diaphragm (10), is provided in the area of a compensating diaphragm (10).Type: GrantFiled: February 21, 2008Date of Patent: February 7, 2012Assignee: Dräger Medical GmbHInventor: Karsten Hoffmann
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Publication number: 20110146679Abstract: A respirator with a breathing gas block (2) and with breathing gas ducts (13, 15, 17) and with a heater has the electric components located outside of the breathing gas-carrying areas. A heated distributor plate is flatly in contact on the underside of the breathing gas block (2) and has heating ribs (21, 22) that are in contact with breathing gas ducts (13, 15) at least in some areas.Type: ApplicationFiled: November 24, 2010Publication date: June 23, 2011Applicant: Drager Medical AG & Co. KGInventors: Ralf HEESCH, Karsten HOFFMANN, Henryk SCHNAARS, Ahmet Türker
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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: 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: 20080223368Abstract: A dispensing valve with admission pressure compensation and a safety device for maximum pressure limitation of the admission pressure. To accomplish the object, a deformation zone (18), which can be brought into contact with a support surface (14) by the admission pressure by admitting pressure in the direction of a reduction of the active area of the compensating diaphragm (10), is provided in the area of a compensating diaphragm (10).Type: ApplicationFiled: February 21, 2008Publication date: September 18, 2008Applicant: DRAGER MEDICAL AG & CO. KGInventor: Karsten HOFFMANN
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Patent number: 7315754Abstract: An electrode belt for impedance tomography shall be improved such that it has a simple design and makes possible good contacting of the electrodes (2) with the body of the test subject to be examined. The electrode belt (1) has at least 16 electrodes (2) on an electrode holder or belt material (3), which is elastic at least in some sections. The belt formed of one or more belt material sections completely surrounds a test subject to be examined on the circumference of the body. Electrode feed lines (63) extend along the electrode holder (3). The electrode feed lines and are connected to a feed line (6) at least at one feed point (4) on the electrode holder (3).Type: GrantFiled: January 27, 2004Date of Patent: January 1, 2008Assignee: Dräger Medical AG & Co. KGaAInventors: Steffen Leonhardt, Eckhard Teschner, Markus Hampe, Hans-Wilhelm Steen, Jianhua Li, Karsten Hoffmann, Yvo Gärber, Hans Matthiessen, Rainer Degenhart, Dieter Sahmkow
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Patent number: 7286863Abstract: A device is provided for putting an electrode carrier on a recumbent patient. The device includes a first lifting cushion that supports the shoulder region and the head of the patient at the same time and into which a pressurized medium can be admitted. A second lifting cushion is provided that supports the lumbar region and into which pressurized medium can be admitted. A spacer is provided fixing the lifting cushions in relation to one another in the chest region.Type: GrantFiled: May 20, 2004Date of Patent: October 23, 2007Assignee: Dräger Medical AG & Co. KGaAInventors: Steffen Leonhardt, Eckhard Teschner, Dieter Sahmkow, Hans-Wilhelm Steen, Hans Matthiessen, Yvo Gärber, Karsten Hoffmann, Jianhua Li, Rainer Degenhart, Markus Hampe
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Publication number: 20050033134Abstract: A device is provided for putting an electrode carrier on a recumbent patient. The device includes a first lifting cushion that supports the shoulder region and the head of the patient at the same time and into which a pressurized medium can be admitted. A second lifting cushion is provided that supports the lumbar region and into which pressurized medium can be admitted. A spacer is provided fixing the lifting cushions in relation to one another in the chest region.Type: ApplicationFiled: May 20, 2004Publication date: February 10, 2005Inventors: Steffen Leonhardt, Eckhard Teschner, Dieter Sahmkow, Hans-Wilhelm Steen, Hans Matthiessen, Yvo Garber, Karsten Hoffmann, Jianhua Li, Rainer Degenhart, Markus Hampe
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Publication number: 20040260167Abstract: An electrode belt for impedance tomography shall be improved such that it has a simple design and makes possible good contacting of the electrodes (2) with the body of the test subject to be examined. The electrode belt (1) has at least 16 electrodes (2) on an electrode holder or belt material (3), which is elastic at least in some sections. The belt formed of one or more belt material sections completely surrounds a test subject to be examined on the circumference of the body. Electrode feed lines (63) extend along the electrode holder (3). The electrode feed lines and are connected to a feed line (6) at least at one feed point (4) on the electrode holder (3).Type: ApplicationFiled: January 27, 2004Publication date: December 23, 2004Inventors: Steffen Leonhardt, Eckhard Teschner, Markus Hampe, Hans-Wilhelm Steen, Jianhua Li, Karsten Hoffmann, Yvo Garber, Hans Matthiessen, Rainer Degenhart, Dieter Sahmkow
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Patent number: 6805119Abstract: A device for controlling the breathing gas flow is provided including a breathing gas block (2), a cover (4) and a valve plate (3) as well as a heating device. Condensation effects are prevented from occurring with the supply of the smallest possible amount of energy by provision of a heating foil (16) as a heating element.Type: GrantFiled: January 22, 2003Date of Patent: October 19, 2004Assignee: Dräger Medical AG & Co. KGaAInventors: Karsten Hoffmann, Olaf Wohlenberg
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Publication number: 20030200968Abstract: A device for controlling the breathing gas flow is provided including a breathing gas block (2), a cover (4) and a valve plate (3) as well as a heating device. Condensation effects are prevented from occurring with the supply of the smallest possible amount of energy by provision of a heating foil (16) as a heating element.Type: ApplicationFiled: January 22, 2003Publication date: October 30, 2003Inventors: Karsten Hoffmann, Olaf Wohlenberg
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Patent number: 6553990Abstract: A process, system and apparatus for changing the concentration in an anesthesia apparatus with a fresh gas metering unit (14) and a pressure sensor (17) in the breathing circuit, with a volume displacement device (1) in the inspiration branch and a PEEP/PMAX valve (7) in the expiration branch. The fresh gas metering unit (14), the pressure sensor (17), the volume displacement unit (1) and the PEEP/PMAX valve (7) are connected to an evaluating and control unit (15). To bring about a rapid change in the concentration of the anesthetic or fresh gas supplied in the breathing circuit without additional design effort on the anesthesia apparatus the volume displacement device (1) is rinsed, either under the control of the fresh gas supply or under the control of the speed at which the volume displacement device (1) is returned. The rinsing takes place simultaneously with the regular respiration operation of the anesthesia apparatus, which may take place in a volume-controlled or pressure-controlled manner.Type: GrantFiled: May 29, 2001Date of Patent: April 29, 2003Assignee: Dräger Medizintechnik GmbHInventor: Karsten Hoffmann
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Publication number: 20020023643Abstract: A process, system and apparatus for changing the concentration in an anesthesia apparatus with a fresh gas metering unit (14) and a pressure sensor (17) in the breathing circuit, with a volume displacement device (1) in the inspiration branch and a PEEP/PMAX valve (7) in the expiration branch. The fresh gas metering unit (14), the pressure sensor (17), the volume displacement unit (1) and the PEEP/PMAX valve (7) are connected to an evaluating and control unit (15). To bring about a rapid change in the concentration of the anesthetic or fresh gas supplied in the breathing circuit without additional design effort on the anesthesia apparatus the volume displacement device (1) is rinsed, either under the control of the fresh gas supply or under the control of the speed at which the volume displacement device (1) is returned. The rinsing takes place simultaneously with the regular respiration operation of the anesthesia apparatus, which may take place in a volume-controlled or pressure-controlled manner.Type: ApplicationFiled: May 29, 2001Publication date: February 28, 2002Inventor: Karsten Hoffmann
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Patent number: 6009871Abstract: A ventilating apparatus includes a closed breathing loop (3) which is supplied with the gases needed for ventilation via a metering unit (9). The ventilating apparatus is improved in such a manner that the respiratory gas can be metered during the inspiration phase without affecting the respiratory gas stroke volume supplied to the patient. The ventilating apparatus includes a flow-measuring device (14) for detecting a gas volume (V.sub.F) which is metered into the closed breathing loop (3) during the inspiration phase. A subtraction element (16) forms a difference volume (V.sub.T -V.sub.F) between the pump volume (V.sub.T) and the gas volume (V.sub.F). A switch (21) permits utilizing the difference volume (V.sub.T -V.sub.F) as a new adjusting value for the pump volume of the respiratory gas pump unit (2).Type: GrantFiled: November 12, 1997Date of Patent: January 4, 2000Assignee: Dragerwek AktiengesellschaftInventors: Siegfried Kiske, Karsten Hoffmann