Patents by Inventor Ranajit Das

Ranajit Das 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).

  • Bi-directional wing unfolding mechanism
    Patent number: 11175117
    Abstract: The present disclosure relates to a bi-directional wing unfolding mechanism for unfolding and locking wings of air vehicle during deployment. The mechanism comprises one or more flexible member to enable lift and rotational movements of the wings of air vehicle about one or more axis. The mechanism also comprises one or more pairs of lock pins to lock undesired lift and rotational movement of the wings after the desired movements, thereby enabling minimum roll disturbance and near synchronous locking of all wings. Further, the mechanism also enables folding and unfolding of the wings having higher aspect ratio by folding and unfolding at mutually perpendicular axes. The mechanism also enables lower drag and results in high aerodynamic performance, low roll rate and better flight trajectory.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: November 16, 2021
    Assignee: CHAIRMAN, DEFENCE RESEARCH & DEVELOPMENT ORGANISATION (DRDO)
    Inventors: Venkata Lakshmi Chennakeseva Rao Bavanari, Ismail Shaik, Prakash Jain, Seeta Rama Anjaneyulu Pamarthi, Naveed Ali, Ranajit Das, Kaikobad Erachshaw Kapadia
  • BI-DIRECTIONAL WING UNFOLDING MECHANISM
    Publication number: 20190154420
    Abstract: The present disclosure relates to a bi-directional wing unfolding mechanism for unfolding and locking wings of air vehicle during deployment. The mechanism comprises one or more flexible member to enable lift and rotational movements of the wings of air vehicle about one or more axis. The mechanism also comprises one or more pairs of lock pins to lock undesired lift and rotational movement of the wings after the desired movements, thereby enabling minimum roll disturbance and near synchronous locking of all wings. Further, the mechanism also enables folding and unfolding of the wings having higher aspect ratio by folding and unfolding at mutually perpendicular axes. The mechanism also enables lower drag and results in high aerodynamic performance, low roll rate and better flight trajectory.
    Type: Application
    Filed: July 11, 2017
    Publication date: May 23, 2019
    Inventors: Venkata Lakshmi Chennakeseva Rao BAVANARI, Ismail SHAIK, Prakash JAIN, Seeta Rama Anjaneyulu PAMARTHI, Naveed ALI, Ranajit DAS, Kaikobad Erachshaw KAPADIA
  • Extracting gene-gene interactions from gene expression data
    Patent number: 8478541
    Abstract: Disclosed are methods and custom computing apparatuses for identifying gene-gene interactions from gene expression data, based on which a gene regulatory sub-network can be built. In particular, relationships in which multiple genes co-regulate one target gene can also be identified.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: July 2, 2013
    Assignee: Indian Statistical Institute
    Inventors: Sushmita Mitra, Chivukula Anjaneya Murthy, Ranajit Das
  • Extracting Gene-Gene Interactions from Gene Expression Data
    Publication number: 20120041912
    Abstract: Disclosed are methods and custom computing apparatuses for identifying gene-gene interactions from gene expression data, based on which a gene regulatory sub-network can be built. In particular, relationships in which multiple genes co-regulate one target gene can also be identified.
    Type: Application
    Filed: August 10, 2010
    Publication date: February 16, 2012
    Inventors: Sushmita MITRA, C. A. Murthy, Ranajit Das