Patents by Inventor Karl A De Paiva

Karl A De Paiva 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).

  • Hub cap for a wheel bearing
    Patent number: 6488342
    Abstract: A hub cap (10) is fitted to the outer end of a wheel hub (11) containing a wheel bearing (14) to seal the outer end of the hub (11). The hub cap (10) has a cylindrical housing (16) which is provided with a transparent outer end wall (17) to permit the level of lubrication around the bearing (14) to be ascertained visually. The cylindrical housing (16) has an aperture within which a plug (22) is fitted. The plug (22) has a flexible diaphragm (21) which deforms to accommodate pressure changes within the hub cap (10). The hub cap (10) is particularly suitable for wheel bearings of trailers, such as boat trailers.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: December 3, 2002
    Assignee: Neumann Steel Pty. Ltd.
    Inventor: Karl A De Paiva