Patents by Inventor Kenneth Bickerstaff

Kenneth Bickerstaff 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: 4299018
    Abstract: A roll for use under high or low temperature conditions, for example a conveyor roll in a flat glass annealing lehr, comprises a tire of a different material from collars on the roll between which the tire is held. The tire and at least one collar have matching frusto-conical surfaces which are designed so that differential thermal expansion between the tire and the retaining collars causes sliding movement only of frusto-conical surfaces relative to each other.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: November 10, 1981
    Assignee: Pilkington Brothers Limited
    Inventors: Kenneth Bickerstaff, John D. Brewin