Patents by Inventor Mary Ellen Armitage

Mary Ellen Armitage 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).

  • Propshaft assembly with vibration attenuation and assembly method therefor
    Patent number: 6874228
    Abstract: A shaft structure and at least two non-identical inserts. The shaft structure has a cavity and vibrates in response to the receipt of an input of a predetermined frequency such that at least two second bending mode anti-nodes are generated in spaced relation to one another along the longitudinal axis of the shaft structure. Each of the inserts is disposed within the longitudinally extending cavity at a position that approximately corresponds to an associated one of the anti-nodes. A method for attenuating noise transmission from a vehicle driveline is also disclosed.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: April 5, 2005
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: Mary Ellen Armitage, Jeffrey N. Heaton, David P. Schankin, Donald J. Kurecka
  • Propshaft assembly with vibration attenuation and assembly method therefor
    Publication number: 20040192451
    Abstract: A shaft structure and at least two non-identical inserts. The shaft structure has a cavity and vibrates in response to the receipt of an input of a predetermined frequency such that at least two second bending mode anti-nodes are generated in spaced relation to one another along the longitudinal axis of the shaft structure. Each of the inserts is disposed within the longitudinally extending cavity at a position that approximately corresponds to an associated one of the anti-nodes. A method for attenuating noise transmission from a vehicle driveline is also disclosed.
    Type: Application
    Filed: April 8, 2004
    Publication date: September 30, 2004
    Inventors: Mary Ellen Armitage, Jeffrey N. Heaton, David P. Schankin, Donald J. Kurecka
  • Foam lined propshaft
    Patent number: 6752722
    Abstract: A shaft structure and at least two insert members. The shaft structure has a longitudinally extending cavity and is configured to vibrate in response to the receipt of an input of a predetermined frequency such that at least two second bending mode anti-nodes are generated in spaced relation to one another along the longitudinal axis of the shaft structure. The insert members are disposed within the longitudinally extending cavity and engage an inner wall of the shaft structure. Each of the insert members is located at a position that approximately corresponds to an associated one of the anti-nodes and has a density that is tailored to an anticipated displacement of the associated anti-node. A method for attenuating noise transmission from a vehicle driveline is also disclosed.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: June 22, 2004
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: Mary Ellen Armitage, Jeffrey N. Heaton, David P. Schankin, Donald J. Kurecka
  • Foam lined propshaft
    Publication number: 20030176224
    Abstract: A shaft structure and at least two insert members. The shaft structure has a longitudinally extending cavity and is configured to vibrate in response to the receipt of an input of a predetermined frequency such that at least two second bending mode anti-nodes are generated in spaced relation to one another along the longitudinal axis of the shaft structure. The insert members are disposed within the longitudinally extending cavity and engage an inner wall of the shaft structure. Each of the insert members is located at a position that approximately corresponds to an associated one of the anti-nodes and has a density that is tailored to an anticipated displacement of the associated anti-node. A method for attenuating noise transmission from a vehicle driveline is also disclosed.
    Type: Application
    Filed: March 13, 2002
    Publication date: September 18, 2003
    Inventors: Mary Ellen Armitage, Jeffrey N. Heaton, David P. Schankin, Donald J. Kurecka