Patents Assigned to Stefa Industri Aktiebolag
  • Patent number: 4303250
    Abstract: Sealing in an adapter for available sealing grooves, preferably for a reciprocating piston rod (1) of a cylinder (2) and for adapting the sealing to other types of sealing rings and comprising an adapter body (7) the outer dimensions of which substantially correspond to those of the available sealing groove (3) and having a radially inner sealing (8) providing a seal between the piston rod (1) and the adapter body (7) and a radially outer sealing (9) providing a seal between the adapter body (7) and the cylinder (2). Preferably the first mentioned sealing (8) is mounted at or adjacent the end of the adapter body (7), which is opposed the pressurized chamber (P) whereas the second sealing (9) is provided at or adjacent the end of the adapter body (7) facing the pressurized chamber (P). One and the same adaptor body may include one or several sealings of both kinds.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: December 1, 1981
    Assignee: Stefa Industri Aktiebolag
    Inventor: Per-Ake Persson
  • Patent number: 4285526
    Abstract: A sealing device for bearings in which two sealing areas are provided in series, each comprising an elastomeric sealing lip, the lips being part of a single ring and contacting cylindrical surfaces of a surrounding housing, the sealing ring being attached to a metallic liner.
    Type: Grant
    Filed: September 25, 1979
    Date of Patent: August 25, 1981
    Assignee: Stefa Industri Aktiebolag
    Inventors: G. Rune Klinteberg, N. A. Bertil Johansson, B. Lennart Johansson, Christer H. Dahlgren