Patents by Inventor Rajagopal Vijayakumar

Rajagopal Vijayakumar 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).

  • Patent number: 10663376
    Abstract: An apparatus includes a motor having a first shaft extending therefrom. The motor is configured to apply energy to the first shaft. A particle cartridge mechanically is coupled to the motor via the first shaft. The particle cartridge includes a screen separating an internal volume of the particle cartridge from an environment of the apparatus, and a plurality of particles disposed within the internal volume. A particle manipulation element is mechanically coupled to the first shaft and in contact with the plurality of particles. The particle manipulation element moves in response to the energy being applied to the first shaft to force some of the particles through the screen and into the environment of the apparatus.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: May 26, 2020
    Assignee: United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Juan H. Agui, Rajagopal Vijayakumar
  • Patent number: 10078036
    Abstract: A modular pre-filtration apparatus may be beneficial to extend the life of a filter. The apparatus may include an impactor that can collect a first set of particles in the air, and a scroll filter that can collect a second set of particles in the air. A filter may follow the pre-filtration apparatus, thus causing the life of the filter to be increased.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: September 18, 2018
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Juan H. Agui, Rajagopal Vijayakumar
  • Patent number: 9121792
    Abstract: A modular pre-filtration apparatus may be beneficial to extend the life of a filter. The apparatus may include an impactor that can collect a first set of particles in the air, and a scroll filter that can collect a second set of particles in the air. A filter may follow the pre-filtration apparatus, thus causing the life of the filter to be increased.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: September 1, 2015
    Assignee: The United States of America as Represented by the Administrator of National Aeronautics and Space Administration
    Inventors: Juan H Agui, Rajagopal Vijayakumar
  • Patent number: 8408046
    Abstract: A system for in line in situ validation of an air filter of an exhaust filter system including a scan head, a means for facilitating movement of said scan head in the XY plane, a means for externally controlling the movement of the scan head from outside the plenum of the exhaust filter system in the XY plane, and a means for coupling the scan head to the means for externally controlling the movement of the scan head, is provided. The system can also include a scanning arm, inside and outside magnetic couples, and rolling means to facilitate movement of the inside and outside magnetic couples. A method for in line in situ validation of an air filter in an exhaust filter system is also described, which involves the use of the system for in line in situ validation of air filters of an exhaust filter system.
    Type: Grant
    Filed: November 13, 2009
    Date of Patent: April 2, 2013
    Inventors: Zhonglin Xu, Yizhao Zhang, Feng Wen, Jinming Shen, Xin Feng, Rajagopal Vijayakumar
  • Patent number: 7998259
    Abstract: The present invention relates generally to particle removal and air borne molecular contaminant air filters, and, more particularly, to a combination particle and air borne molecular contaminant filter with an activated material separator.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: August 16, 2011
    Inventor: Rajagopal Vijayakumar
  • Patent number: 7224454
    Abstract: An analyzing probe for insertion into numerous different environments to determine at least one characteristic of particulate matter suspended in a fluid stream of a test sample. Preferably, the analyzing probe includes a minimal amount of optical elements such as lenses that are subjected to the conditions of the environment of the fluid stream to be tested. Further, the analyzing probe is preferably designed so that it can be readily manufactured, operated and installed by relatively unskilled laborers.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: May 29, 2007
    Assignee: Hamilton Associates, Inc.
    Inventors: Rajagopal Vijayakumar, Sylvain Dominique Masset
  • Publication number: 20050225760
    Abstract: An analyzing probe for insertion into numerous different environments to determine at least one characteristic of particulate matter suspended in a fluid stream of a test sample. Preferably, the analyzing probe includes a minimal amount of optical elements such as lenses that are subjected to the conditions of the environment of the fluid stream to be tested. Further, the analyzing probe is preferably designed so that it can be readily manufactured, operated and installed by relatively unskilled laborers.
    Type: Application
    Filed: August 30, 2004
    Publication date: October 13, 2005
    Inventors: Rajagopal Vijayakumar, Sylvain Masset
  • Patent number: 6784988
    Abstract: An analyzing probe for insertion into numerous different environments to determine at least one characteristic of particulate matter suspended in a fluid stream of a test sample. Preferably, the analyzing probe includes a minimal amount of optical elements such as lenses that are subjected to the conditions of the environment of the fluid stream to be tested. Further, the analyzing probe is preferably designed so that it can be readily manufactured, operated and installed by relatively unskilled laborers.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: August 31, 2004
    Assignee: Hamilton Associates, Inc.
    Inventors: Rajagopal Vijayakumar, Sylvain Dominique Masset
  • Publication number: 20040012777
    Abstract: An analyzing probe for insertion into numerous different environments to determine at least one characteristic of particulate matter suspended in a fluid stream of a test sample. Preferably, the analyzing probe includes a minimal amount of optical elements such as lenses that are subjected to the conditions of the environment of the fluid stream to be tested. Further, the analyzing probe is preferably designed so that it can be readily manufactured, operated and installed by relatively unskilled laborers.
    Type: Application
    Filed: July 17, 2002
    Publication date: January 22, 2004
    Inventors: Rajagopal Vijayakumar, Sylvain Dominique Masset