Patents Assigned to EMA Instrument AB
  • Venting device for oil-burning installations
    Patent number: 4570664
    Abstract: The invention relates to a venting device for oil-burning installations. A float arranged in a venting chamber controls both a connection between the venting chamber and the surrounding atmosphere and a connection between the venting chamber and the suction side of an oil pump included in the installation.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: February 18, 1986
    Assignee: EMA Instrument AB
    Inventors: Nils I. Jonsson, Lars E. Hedenstierna