Patents by Inventor Kristian Iversen

Kristian Iversen 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).

  • Electric laminar resistor and method of making same
    Patent number: 4910492
    Abstract: An electric laminar resistor and the method of making same wherein a thin metal film is applied to a ceramic substrate. Metal film material is removed to form a resistance track and recessed connecting zones at opposite ends of the track. A burnt-in thick layer paste is extended through the connecting zone recesses and solidified to form connecting elements that are adhered to the substrate. A glass frit coating is applied over the resistance track, but not over the connecting elements. The resistance of the resistor may be adjusted by separating a part of the track.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: March 20, 1990
    Assignee: Danfoss A/S
    Inventors: Kristian Iversen, Per G. Zacho
  • Electric laminar resistor and method of making same
    Patent number: 4853671
    Abstract: An electric laminar resistor wherein a thin metal film is applied to a ceramic substrate. Metal film material is removed to form a resistance track and recessed connecting zones at opposite ends of the track. A burnt-in thick layer paste extends through the connecting zone recesses and solidified to form connecting elements that are adhered to the substrate. A metal powder and glass frit coating is applied over the resistance track. The resistance of the resistor may be adjusted by separating a part of the track.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: August 1, 1989
    Assignee: Danfoss A/S
    Inventors: Kristian Iversen, Per G. Zacho
  • Means for setting the switching on and off periods of a burner of a hot water heating installation
    Patent number: 4585165
    Abstract: The invention relates to a hot water heating system which includes individually operated radiators arranged in parallel. A heat exchanger and a pump supply hot water to the radiators. Control apparatus is included for reducing the on and off switching frequences. The control apparatus includes an integrator which outputs a value which is proportional to the difference between a reference temperature and the temperature at the output of the heat exchanger. The integrator value is fed to a hysteresis switch which switches the heat exchanger on and off when the integrator value reaches the opposite limits of the hysteresis switch.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: April 29, 1986
    Assignee: Danfoss A/S
    Inventor: Kristian Iversen
  • Heating installation comprising a boiler and a heat pump
    Patent number: 4412581
    Abstract: The invention relates to a heating installation which includes a boiler and a heat pump. The heat pump has a multi-stage compressor. Graded threshold value operating switches for the multi-stage compressor and the boiler are provided. A control unit which includes comparator and integrator units functions to select compressor and boiler outputs in response to comparisons between indoor and outdoor temperatures made by the comparator unit.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: November 1, 1983
    Assignee: Danfoss A/S
    Inventors: Kristian Iversen, Henning Hansen