Fluid Insulation Patents (Class 336/94)
  • Oil-filled apparatus with means for achieving pressure between parts thereof
    Patent number: 3936784
    Abstract: In an oil-filled apparatus, such as a transformer, having parts between which pressure is to be applied, such pressure is produced by providing between the parts bodies of an elastomer which absorbs the oil and expands as a result of such absorption. Such bodies may be used between windings and cores or as a seal between a transformer lid and a flange.
    Type: Grant
    Filed: May 23, 1974
    Date of Patent: February 3, 1976
    Assignee: Allmanna Svenska Elektriska Aktiebolaget
    Inventors: Carl Elfgren, Erich Spicar