Patents by Inventor Eric T. Riley

Eric T. Riley 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 and apparatus for densifying powder metal gears
    Patent number: 7578963
    Abstract: The invention provides a method and apparatus for densifying the teeth of a powder metal preform gear. The die includes an aperture for receiving a body of the gear and a plurality of grooves for receiving the teeth of the gear. The grooves have a length and a variable width along the length. The grooves narrow tangentially relative to the aperture. The powder metal preform gear is urged through the die and the teeth are plastically and elastically deformed at a relatively narrow portion of the groove. After passing through the narrow portion of the groove and being compressed, the teeth can at least partially recover. The grooves defined by the die can be helical for forming a helical groove.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: August 25, 2009
    Assignee: PMG Indiana Corp.
    Inventors: Juan R. L. Trasorras, Eric T. Riley
  • Method and apparatus for densifying powder metal gears
    Patent number: 7025929
    Abstract: The invention provides a method and apparatus for densifying the teeth of a powder metal preform gear. The die includes an aperture for receiving a body of the gear and a plurality of grooves for receiving the teeth of the gear. The grooves have a length and a variable width along the length. The grooves narrow tangentially relative to the aperture. The powder metal preform gear is urged through the die and the teeth are plastically and elastically deformed at a relatively narrow portion of the groove. After passing through the narrow portion of the groove and being compressed, the teeth can at least partially recover. The grooves defined by the die can be helical for forming a helical groove.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: April 11, 2006
    Assignee: PMG Ohio Corp.
    Inventors: Juan R. L. Trasorras, Eric T. Riley