Patents by Inventor William Douglas Bennett

William Douglas Bennett 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).

  • Method and apparatus for the recovery of vulcanized elastomeric material
    Patent number: 4090670
    Abstract: Rubber is recovered for re-use e.g. from scrap pneumatic tires by briefly raising a surface of the tire to a high temperature and then rasping the heat-treated surface. Tires reinforced either with a textile or a steel ply can first be parted on opposite sides of the breaker structure. A machine is provided which accepts pieces of vulcanized material and progressively reduces them to heat-treated particles by repetitively heating a surface of each piece and attacking it with a rasping tool.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: May 23, 1978
    Assignee: Dunlop Limited
    Inventor: William Douglas Bennett