Patents by Inventor Ravi S. Thyagarajan

Ravi S. Thyagarajan 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).

  • Defect detection system using finite element optimization and mesh analysis
    Patent number: 10949584
    Abstract: A defect detection system uses dedicated, simultaneously operating finite element optimization and mesh generation. Using an Eddy-current based probe, the system can detect and model surface and sub-surface defects.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: March 16, 2021
    Assignees: BOARD OF TRUSTEES OF MICHIGAN STATE UNIVERSITY, SECRETARY OF THE ARMY
    Inventors: S. Ratnajeevan H. Hoole, Sivamayam Sivasuthan, Victor Uthayakumar Karthik, Paramsothy Jayakumar, Ravi S. Thyagarajan, Lalita Udpa, Arunasalam Rahunanthan
  • Reclining seat to mitigate the effects of mine blast load on spine and lower leg injuries
    Patent number: 10245985
    Abstract: A seat assembly reclines during an under-vehicle explosion or other upward impact on the vehicle to mitigate spinal and lower leg damage to a human occupant. The seat assembly has a back frame portion and a lower frame portion. The lower frame portion has a pivotal connection with an energy absorbing mechanism mounted to the vehicle floor. The pivotal connection includes a stop mechanism to prevent seat assembly tilt during normal vehicle operation but allow tilt due to an explosion. A second mechanism is disposed between the back frame portion and the floor; this mechanism controls the seat assembly pivot and provides further absorbing of energy from the upward impact. Projections from the front of the lower frame portion toward the floor can be used to enhance seat assembly pivoting; specially designed seat engagement levers can be used for this purpose as well.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: April 2, 2019
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ravi S. Thyagarajan, Jaisankar Ramalingam, Robert G. Kargus
  • Reclining seat to mitigate the effects of mine blast load on spine and lower leg injuries
    Patent number: 9527413
    Abstract: A seat assembly reclines during an under-vehicle explosion or other upward impact on the vehicle to mitigate spinal and lower leg damage to a human occupant. The seat assembly has a back frame portion and a lower frame portion. The lower frame portion has a pivotal connection with an energy absorbing mechanism mounted to the vehicle floor. The pivotal connection includes a stop mechanism to prevent seat assembly tilt during normal vehicle operation but allow tilt due to an explosion. A second mechanism is disposed between the back frame portion and the floor; this mechanism controls the seat assembly pivot and provides further absorbing of energy from the upward impact. Projections from the front of the lower frame portion toward the floor can be used to enhance seat assembly pivoting; specially designed seat engagement levers can be used for this purpose as well.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: December 27, 2016
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Ravi S. Thyagarajan, Jaisankar Ramalingam, Robert G. Kargus
  • DEFECT DETECTION SYSTEM USING FINITE ELEMENT OPTIMIZATION AND MESH ANALYSIS
    Publication number: 20160343106
    Abstract: A defect detection system uses dedicated, simultaneously operating finite element optimization and mesh generation. Using an Eddy-current based probe, the system can detect and model surface and sub-surface defects.
    Type: Application
    Filed: May 20, 2016
    Publication date: November 24, 2016
    Inventors: S. Ratnajeevan H. Hoole, Sivamayam Sivasuthan, Victor Karthik Uthayakumar, Paramsothy Jayakumar, Ravi S. Thyagarajan