Patents by Inventor Andrew A. Fraser

Andrew A. Fraser 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).

  • Patent number: 4985763
    Abstract: A jet nozzle for use in propelling a trolley or sledge provided with a television or video camera along a conduit, such as a sewer, for use in inspecting the interior of the conduit, the jet nozzle comprising a casing having an end wall provided with a plurality of discharge openings communicating with a chamber formed between said end wall and a transverse wall, an inlet in communication with the chamber and connected to a home, a bearing provided on the casing mounting a connector member for connecting the jet nozzle to the trolley or sledge and allowing the casing to rotate relative to the connector member.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: January 15, 1991
    Inventor: Andrew A. Fraser