Patents by Inventor Frank Helleis

Frank Helleis 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).

  • VENTILATION APPARATUS FOR VENTILATING A PERSON, CONTROL METHOD FOR CENTRIFUGAL FAN OF A VENTILATION APPARATUS, AND VENTILATION METHOD
    Publication number: 20230310777
    Abstract: An apparatus comprises a centrifugal fan having an inlet and outlet, the fan receives ventilation air at the inlet and provides the ventilation air at an adjustable pressure at the outlet, a first respiration line with a first end connected to the inlet and a second end for receiving inhalation air, a second respiration line having a first end connected to the outlet and a second end for coupling a filter and a ventilation mask, the second respiration line having a sensor, to measure a flow parameter in the second respiration line, and a device for controlling the fan according to an output signal of the sensor, the fan and second respiration lines forming a continuous bidirectional flow path, the adjustable ventilation pressure at the outlet comprises an inhalation or an exhalation pressure less than or equal to the inhalation pressure, and the second respiration line has an air filter.
    Type: Application
    Filed: July 19, 2021
    Publication date: October 5, 2023
    Applicant: MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E.V.
    Inventor: FRANK HELLEIS
  • Gas chromatography apparatus
    Patent number: 7306656
    Abstract: The invention relates to a gas chromatography apparatus with a cooling device, wherein the cooling device includes a closed cooling circuit containing a refrigerant, so that no refrigerant is wasted.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: December 11, 2007
    Assignee: Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.
    Inventors: Lutz Lange, Frank Helleis, Jonathan Williams, Thomas Kenntner
  • Gas chromatography apparatus
    Publication number: 20060191414
    Abstract: The invention relates to a gas chromatography apparatus with a cooling device, wherein the cooling device includes a closed cooling circuit containing a refrigerant, so that no refrigerant is wasted.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 31, 2006
    Applicant: Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.
    Inventors: Lutz Lange, Frank Helleis, Jonathan Williams, Thomas Kenntner