Patents by Inventor Shridhar Yariagadda

Shridhar Yariagadda 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 and method for induction lamination of electrically conductive fiber-reinforced composite materials
    Patent number: 7419373
    Abstract: A method and apparatus for forming laminate composite structures. At least two laminae, each containing electrically conductive reinforcing fibers, are placed upon each other in contacting relationship to form a generally layered structure. The layered structure may be subjected to heat to conductively transfer heat through the layered structure and thereby improve the surface contact between the two laminae. The layered structure is volumetrically heated by inductively transferring energy to the electrically conductive reinforcing fibers. The heated, layered structure is consolidated, such as by applying pressure and reducing the temperature of the layered structure. The consolidated structure is then quenched by rapidly cooling the consolidated structure in a directionally controlled manner about a midplane thereof.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: September 2, 2008
    Assignee: Alliant Techsystems Inc.
    Inventors: Jack K. Gerhard, Eric J. Lynam, Mark R. Shaffer, Shridhar Yariagadda, Nicholas B. Shevchenko, Bruce K. Fink, Dirk Heider, John J. Tierney, John W. Gillespie, Jr.
  • Apparatus and method for induction lamination of electrically conductive fiber reinforced composite materials
    Publication number: 20060013913
    Abstract: A method and apparatus for forming laminate composite structures. At least two laminae, each containing electrically conductive reinforcing fibers, are placed upon each other in contacting relationship to form a generally layered structure. The layered structure may be subjected to heat to conductively transfer heat through the layered structure and thereby improve the surface contact between the two laminae. The layered structure is volumetrically heated by inductively transferring energy to the electrically conductive reinforcing fibers. The heated, layered structure is consolidated, such as by applying pressure and reducing the temperature of the layered structure. The consolidated structure is then quenched by rapidly cooling the consolidated structure in a directionally controlled manner about a midplane thereof.
    Type: Application
    Filed: April 19, 2005
    Publication date: January 19, 2006
    Inventors: Jack Gerhard, Eric Lynam, Mark Shaffer, Shridhar Yariagadda, Nicholas Shevchenko, Bruce Fink, Dirk Heider, John Tierney, John Gillespie
  • Method for induction lamination of electrically conductive fiber reinforced composite materials
    Patent number: 6881374
    Abstract: A method and apparatus for forming laminate composite structures. At least two laminae, each containing electrically conductive reinforcing fibers, are placed upon each other in contacting relationship to form a generally layered structure. The layered structure may be subjected to heat to conductively transfer heat through the layered structure and thereby improve the surface contact between two laminae. The layered structure is volumetrically heated by inductively transferring energy to the electrically conductive reinforcing fibers. The heated, layered structure is consolidated, such as by applying pressure and reducing the temperature of the layered structure. The consolidated structure is then quenched by rapidly cooling the consolidated structure in a directionally controlled manner about a midplane thereof.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: April 19, 2005
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Jack K. Gerhard, Eric J. Lynam, Mark R. Shaffer, Shridhar Yariagadda, Nicholas B. Shevchenko, Bruce K. Fink, Dirk Heider, John J. Tierney, John W. Gillespie, Jr.
  • Apparatus and method for induction lamination of electrically conductive fiber reinforced composite materials
    Publication number: 20030062118
    Abstract: A method and apparatus for forming laminate composite structures. At least two laminae, each containing electrically conductive reinforcing fibers, are placed upon each other in contacting relationship to form a generally layered structure. The layered structure may be subjected to heat to conductively transfer heat through the layered structure and thereby improve the surface contact between the two laminae. The layered structure is volumetrically heated by inductively transferring energy to the electrically conductive reinforcing fibers. The heated, layered structure is consolidated, such as by applying pressure and reducing the temperature of the layered structure. The consolidated structure is then quenched by rapidly cooling the consolidated structure in a directionally controlled manner about a midplane thereof.
    Type: Application
    Filed: September 24, 2002
    Publication date: April 3, 2003
    Inventors: Jack K. Gerhard, Eric J. Lynam, Mark R. Shaffer, Shridhar Yariagadda, Nicholas B. Shevchenko, Bruce K. Fink, Dirk Heider, John J. Tierney, John W. Gillespie