Patents by Inventor John Robert Sjolund

John Robert Sjolund 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: 5642979
    Abstract: Converts any fork lift truck to a roll turning fork truck by sliding a specially designed rectangular frame onto the truck forks. A safety chain is incorporated to firmly attach the device to the fork lift carriage. The frame combines a power hoist, with load sensing brake, and cable that engages a roll or coil core via a roll center lift, which continuously grips the core firmly, in combination with an arm proceeding out from the roll center lift to the outside mid-width of the roll or coil which is attached to an adjustable fixed length chain. By lowering or raising the hoist cable past the fixed length chain, rolls can be turned to either a true horizontal or vertical position. The adjustable "L" frame suspends from the fixed length chain at the lowest point with a pivot pin to achieve the turning feature when the hoist cable is activated.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: July 1, 1997
    Assignee: N.R.S. Systems, Inc.
    Inventors: Ralph E. Cullen, John Robert Sjolund