Patents by Inventor Karl-Erik Bohman

Karl-Erik Bohman 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).

  • Machine for deforming the gullets of saw blades to improve resistance to fatigue stress
    Patent number: 4578984
    Abstract: A machine to deform the gullets of saw blades, thereby increasing the resistance of the saw blade to fatigue cracks, by compressing the gullet bottom, the compression being accomplished by pressing the saw blade between one fixed die and one which is pressed upon by a threaded member, said member being turned a part of a turn, thereby moving axially, by being attached to a lever arm, which is lifted and pressed down by a piston, and comprising a mechanism for advancing the saw blade one tooth pitch after each compressing cycle.
    Type: Grant
    Filed: March 5, 1984
    Date of Patent: April 1, 1986
    Assignee: Uddeholm Strip Steel Aktiebolag
    Inventor: Karl-Erik Bohman