Patents by Inventor Erland Nilsson

Erland Nilsson 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).

  • Spark gap devices
    Patent number: 4194138
    Abstract: In a spark gap device a number of arc-resistant insulating elements are stacked in spaced relationship to form spaces between adjacent insulating elements with each element having a through-hole. At least two metallic electrodes are sandwiched between the respective surfaces of adjacent insulating elements in spaced relation to form a spark-over gap therebetween. Each electrode includes a recessed portion and the recessed portions of aligned electrodes on respective opposite sides of an insulating element extend through each of the through-holes in contacting relationship. The insulating elements each include at least one elevation which projects snugly into the recessed portion of an associated electrode.
    Type: Grant
    Filed: November 9, 1978
    Date of Patent: March 18, 1980
    Assignee: ASEA Aktiebolag
    Inventors: Bengt Johansson, Erland Nilsson
  • Cover means for protecting tubes conveying hot mediums
    Patent number: 4119751
    Abstract: A long-distance heating conduit comprising one or more tubes conveying the heating medium, which tubes are supported in the conduit by support means consisting of an insulating material resistant to compression and surrounded by a heat-insulating material also resistant to compression and enclosed by cover foils having holes, the size and shape of which are dimensioned in such a manner that water substantially cannot penetrate, but that they are permeable to gases and vapors.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: October 10, 1978
    Assignee: Nyby Bruk AB
    Inventors: Erland Nilsson, Lennart Lundbohm
  • Long distance heating conduit in particular for hot water lines
    Patent number: 3933181
    Abstract: A long-distance heating conduit comprising one or more tubes conveying the heating medium, which tubes are supported in the conduit by support means consisting of an insulating material resistant to compression and surrounded by a heat-insulating material also resistant to compression and enclosed by cover foils having holes, the size and shape of which are dimensioned in such a manner that water substantially cannot penetrate, but that they are permeable to gases and vapors.
    Type: Grant
    Filed: April 19, 1973
    Date of Patent: January 20, 1976
    Assignee: Nyby Bruk AB
    Inventors: Erland Nilsson, Lennart Lundbohm