Patents by Inventor David Ernest Johnston

David Ernest Johnston 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).

  • Shaft seal having a hinge and a liner
    Publication number: 20020158421
    Abstract: A seal assembly for use with a rotating element such as a shaft includes a case having an axial portion and a radial portion. A seal body is bonded to at least the radial portion of the case. A hinge is bonded to the seal body adjacent to a terminating section of the radial portion of the case. A lip is bonded to the hinge. A liner is attached to the lip. The majority of bending loads and stresses are incurred in the hinge, thus increasing the life of the liner.
    Type: Application
    Filed: February 22, 2002
    Publication date: October 31, 2002
    Inventor: David Ernest Johnston