Patents by Inventor James Engdahl

James Engdahl 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).

  • Method for forming tapered piston pins
    Patent number: 7827683
    Abstract: A method is provided for cold forming center web or webless tapered piston pins in one forming sequence. The method eliminates secondary operations such as but not limited to machining, annealing, coating and secondary forming. The method includes the steps of cutting a metal rod into a substantially cylindrical slug piece, die extruding the slug piece to form a first cavity in the slug piece, optionally die extruding the slug piece to form a second cavity in the slug piece, piercing the slug piece to form the slug piece into a hollow cylindrical piece, die extruding the hollow cylindrical piece at either end to form a hollow cylindrical piece having a taper on an internal surface of the hollow cylindrical piece at either end.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: November 9, 2010
    Assignee: Burgess - Norton Mfg. Co., Inc.
    Inventors: Robert Weiss, Stephen Bangs, James Engdahl, Paul Fecteau
  • Method for forming tapered piston pins
    Publication number: 20080047125
    Abstract: A method is provided for cold forming center web or webless tapered piston pins in one forming sequence. The method eliminates secondary operations such as but not limited to machining, annealing, coating and secondary forming. The method includes the steps of cutting a metal rod into a substantially cylindrical slug piece, die extruding the slug piece to form a first cavity in the slug piece, optionally die extruding the slug piece to form a second cavity in the slug piece, piercing the slug piece to form the slug piece into a hollow cylindrical piece, die extruding the hollow cylindrical piece at either end to form a hollow cylindrical piece having a taper on an internal surface of the hollow cylindrical piece at either end.
    Type: Application
    Filed: August 11, 2006
    Publication date: February 28, 2008
    Inventors: Robert Weiss, Stephen Bangs, James Engdahl, Paul Fecteau