Patents by Inventor Alfred T. Parrella

Alfred T. Parrella 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).

  • Control apparatus for roll grinders
    Patent number: 4371941
    Abstract: A digital control system is provided for positioning a tool relative to a workpiece. The tool is preferably a grinding wheel and the workpiece is a roll appropriately mounted within a roll grinding machine. The digital control system receives various infeed commands representative of the different types of infeed positioning that are to be performed during a grinding operation. The digital control system is thereafter operative to combine these infeed commands into a composite set of control signals. These control signals are applied to a single motor within a pivotal infeed arrangement which moves the grinding wheel relative to the workpiece.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: February 1, 1983
    Assignee: USM Corporation
    Inventors: Ronald J. Gordiski, Robert G. Bennett, Jr., Alfred T. Parrella, Michael Bagnall