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).

  • Patent number: 8671941
    Abstract: 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: Grant
    Filed: November 24, 2010
    Date of Patent: March 18, 2014
    Assignee: Dräger Medical GmbH
    Inventors: Ralf Heesch, Karsten Hoffmann, Henryk Schnaars, Ahmet Türker
  • Patent number: 8109270
    Abstract: 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: Grant
    Filed: February 21, 2008
    Date of Patent: February 7, 2012
    Assignee: Dräger Medical GmbH
    Inventor: Karsten Hoffmann
  • Publication number: 20110146679
    Abstract: 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: Application
    Filed: November 24, 2010
    Publication date: June 23, 2011
    Applicant: Drager Medical AG & Co. KG
    Inventors: Ralf HEESCH, Karsten HOFFMANN, Henryk SCHNAARS, Ahmet Türker
  • Patent number: 7815166
    Abstract: 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: Grant
    Filed: February 5, 2008
    Date of Patent: October 19, 2010
    Assignee: Dräger Medical AG & Co. KG
    Inventors: Karsten Hoffmann, Ralf Lorenzen
  • Publication number: 20080245367
    Abstract: 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: Application
    Filed: February 5, 2008
    Publication date: October 9, 2008
    Applicant: DRÄGER MEDICAL AG & CO. KG
    Inventors: Karsten HOFFMANN, Ralf LORENZEN
  • Publication number: 20080223368
    Abstract: 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: Application
    Filed: February 21, 2008
    Publication date: September 18, 2008
    Applicant: DRAGER MEDICAL AG & CO. KG
    Inventor: Karsten HOFFMANN
  • Patent number: 7315754
    Abstract: 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: Grant
    Filed: January 27, 2004
    Date of Patent: January 1, 2008
    Assignee: Dräger Medical AG & Co. KGaA
    Inventors: Steffen Leonhardt, Eckhard Teschner, Markus Hampe, Hans-Wilhelm Steen, Jianhua Li, Karsten Hoffmann, Yvo Gärber, Hans Matthiessen, Rainer Degenhart, Dieter Sahmkow
  • Patent number: 7286863
    Abstract: 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: Grant
    Filed: May 20, 2004
    Date of Patent: October 23, 2007
    Assignee: Dräger Medical AG & Co. KGaA
    Inventors: Steffen Leonhardt, Eckhard Teschner, Dieter Sahmkow, Hans-Wilhelm Steen, Hans Matthiessen, Yvo Gärber, Karsten Hoffmann, Jianhua Li, Rainer Degenhart, Markus Hampe
  • Publication number: 20050033134
    Abstract: 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: Application
    Filed: May 20, 2004
    Publication date: February 10, 2005
    Inventors: Steffen Leonhardt, Eckhard Teschner, Dieter Sahmkow, Hans-Wilhelm Steen, Hans Matthiessen, Yvo Garber, Karsten Hoffmann, Jianhua Li, Rainer Degenhart, Markus Hampe
  • Publication number: 20040260167
    Abstract: 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: Application
    Filed: January 27, 2004
    Publication date: December 23, 2004
    Inventors: Steffen Leonhardt, Eckhard Teschner, Markus Hampe, Hans-Wilhelm Steen, Jianhua Li, Karsten Hoffmann, Yvo Garber, Hans Matthiessen, Rainer Degenhart, Dieter Sahmkow
  • Patent number: 6805119
    Abstract: 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: Grant
    Filed: January 22, 2003
    Date of Patent: October 19, 2004
    Assignee: Dräger Medical AG & Co. KGaA
    Inventors: Karsten Hoffmann, Olaf Wohlenberg
  • Publication number: 20030200968
    Abstract: 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: Application
    Filed: January 22, 2003
    Publication date: October 30, 2003
    Inventors: Karsten Hoffmann, Olaf Wohlenberg
  • Patent number: 6553990
    Abstract: 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: Grant
    Filed: May 29, 2001
    Date of Patent: April 29, 2003
    Assignee: Dräger Medizintechnik GmbH
    Inventor: Karsten Hoffmann
  • Publication number: 20020023643
    Abstract: 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: Application
    Filed: May 29, 2001
    Publication date: February 28, 2002
    Inventor: Karsten Hoffmann
  • Patent number: 6009871
    Abstract: 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: Grant
    Filed: November 12, 1997
    Date of Patent: January 4, 2000
    Assignee: Dragerwek Aktiengesellschaft
    Inventors: Siegfried Kiske, Karsten Hoffmann