Patents by Inventor Harold W. Gray, Jr.

Harold W. Gray, Jr. 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).

  • Insulated rail for electric transit systems and method of making same
    Patent number: 7484669
    Abstract: A rail cover and support for mounting and insulating the rails of an electric transit system in which the rail cover is vulcanized both to the rail and outer skid support at the manufacturing site prior to delivery to the field and a rail cover completely surrounds both the base flange and web portion of each rail and terminates along the undersides of the top flange. In one form, the upper free ends of the rail cover are increased in thickness to form bumpers along opposite sides of the rail to cushion it against undue shifting or vibration. In fabricating the rail, a sheet dielectric material is vulcanized to the rail with or without a skid plate.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: February 3, 2009
    Assignee: MetroShield LLC
    Inventor: Harold W. Gray, Jr.