Patents by Inventor D. John Jacobson

D. John Jacobson 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).

  • Apparatus for coiling springs with tucked ends
    Patent number: 4986103
    Abstract: A coiling machine employs an apparatus wherein a coil spring having tucked ends may be formed at the coil forming station. After the helical coil is formed, a slider member engages the next to the last formed loop of the coil and forces the loop over the trailing or last formed loop of the coil. The coil is then severed from the wire supply so as to form a coil spring having a tucked trailing end.
    Type: Grant
    Filed: May 8, 1990
    Date of Patent: January 22, 1991
    Assignee: Newcomb Spring Corp.
    Inventor: D. John Jacobson