Patents by Inventor John E. Berryman

John E. Berryman 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).

  • Hydrostatic drive for lathes
    Patent number: 4230165
    Abstract: A veneer lathe for peeling a log has a knife carriage and a mechanism for moving the carriage towards and away from the log. There is an electric motor for moving the carriage towards the log at a rate of speed related to the rotational speed of the log so as to peel a required thickness of veneer and a clutch for coupling the electric motor to the mechanism or disengaging the electric motor from the mechanism. A hydraulic motor is connected to the mechanism for rapidly advancing the carriage towards the log or retracting the carriage from the log. A by-pass valve permits free rotation of the hydraulic motor when the clutch is engaged.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: October 28, 1980
    Assignee: P.S.I. Fluid Power Ltd.
    Inventors: John E. Berryman, John W. Metzner