Patents by Inventor Ian M. Goldswain

Ian M. Goldswain 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).

  • Mechanical seal containing a sealing face with grooved regions which generate hydrodynamic lift between the sealing faces
    Patent number: 5496047
    Abstract: A mechanical face seal has a first sealing ring mounted non-rotatably and sealed with respect to a shaft, a second sealing ring mounted non-rotatably and sealed with respect to a housing the second sealing ring being mounted in axial alignment and being resiliently urged into sealing engagement with the first sealing ring.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: March 5, 1996
    Assignee: John Crane UK Limited
    Inventors: Ian M. Goldswain, Martin W. D. B. Hignett
  • Mechanical face seals
    Patent number: 5375855
    Abstract: A mechanical face seal includes a first sealing ring mounted non-rotatably and sealed with respect to a shaft and a second sealing ring mounted non-rotatably and sealed with respect to a housing, the second sealing ring being mounted in axial alignment with the first sealing ring and springs being provided to urge sealing faces of the first and second sealing rings into sealing engagement. The sealing face of the first sealing ring is provided with a plurality of grooved areas spaced angularly around its circumference, the grooved areas opening to one edge of the sealing face, a continuous annular dam formation being provided between the grooved areas and the other edge of the sealing face.
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: December 27, 1994
    Assignee: John Crane (UK) Limited
    Inventors: Ian M. Goldswain, Martin W. D. B. Hignett
  • Mechanical face seal with trapezoidal shaped grooves on a sealing face
    Patent number: 5222743
    Abstract: A mechanical face seal includes a first sealing ring mounted non-rotatably and sealed with respect to a shaft and a second sealing ring mounted non-rotatably and sealed with respect to a housing, the second sealing ring being mounted in axial alignment with the first sealing ring and springs being provided to urge sealing faces of the first and second sealing rings into sealing engagement. The sealing face of the first sealing ring is provided with a plurality of grooved areas spaced angularly around its circumference, the grooved areas opening to one edge of the sealing face, a continuous annular dam formation being provided between the grooved areas and the other edge of the sealing face.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: June 29, 1993
    Assignee: John Crane (UK) Limited
    Inventors: Ian M. Goldswain, Martin W. Do Boer Hignett