Patents by Inventor Edward M. Gravely, Sr.

Edward M. Gravely, Sr. 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: 4151718
    Abstract: An electronic control device for hydraulic presses for making plywood and the like having electronic computer structure for developing a control for the desired hydraulic pressure having multiple input units on which at least the width, length and unit pressure may be set into the device for automatically effecting the calculation of the required hydraulic line pressure in order to apply the proper pressure upon the laminated plywood panels. The control device also anticipates maximum line pressure and cuts off the hydraulic pump(s) before the desired pressure is reached so that the inertia of the pump(s) and motor(s) will not increase the resultant line pressure above the predetermined desired pressure.
    Type: Grant
    Filed: December 7, 1976
    Date of Patent: May 1, 1979
    Assignee: Henry County Plywood Corporation (2/3)
    Inventor: Edward M. Gravely, Sr.