Patents by Inventor Ashish K. Dasgupta

Ashish K. Dasgupta 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).

  • Optical sensor for quality monitoring of a welding process
    Patent number: 8164022
    Abstract: Disclosed is the design and working principle of a welding monitoring system that can monitor the spectra of zinc and iron in the plasma generated during a welding process involving zinc-coated steel. The monitoring system is capable of monitoring multiple parameters, including spectral line intensity, electron temperature, and ratio of zinc and iron composition in the plasma. The results can then be used individually or in combination to predict resulting weld quality and generate appropriate feedback control signals.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: April 24, 2012
    Assignee: The Regents of the University of Michigan
    Inventors: Jyoti Mazumder, Ashish K. Dasgupta, Mikhail Vasilyev
  • Zero-gap laser welding
    Patent number: 7820939
    Abstract: A method for laser welding a pair of overlapping metal members together and a weld joint produced by the method. At least one of the metal members has a protective metal coating. The method includes applying a thin layer of an alloying agent on at least one of the metal members between the metal members, melting the protective metal coating and the alloying agent to form an alloy that is disposed between the overlapping members with zero gap, welding the overlapping metal members together to form a weld, and controlling the amount of the alloying agent such that the extended solid solubility of the alloying agent in the weld is not exceeded.
    Type: Grant
    Filed: July 27, 2004
    Date of Patent: October 26, 2010
    Assignee: The Regents of the University of Michigan
    Inventors: Jyotirmoy Mazumder, Ashish K. Dasgupta
  • Zero-Gap Laser Welding
    Publication number: 20080302768
    Abstract: A method for laser welding a pair of overlapping metal members together and a weld joint produced by the method. At least one of the metal members has a protective metal coating. The method includes applying a thin layer of an alloying agent on at least one of the metal members between the metal members, melting the protective metal coating and the alloying agent to form an alloy that is disposed between the overlapping members with zero gap, welding the overlapping metal members together to form a weld, and controlling the amount of the alloying agent such that the extended solid solubility of the alloying agent in the weld is not exceeded.
    Type: Application
    Filed: July 27, 2004
    Publication date: December 11, 2008
    Applicant: The Regents of the Univeresity of Michigan
    Inventors: Jyotirmoy Mazumder, Ashish K. Dasgupta
  • OPTICAL SENSOR FOR QUALITY MONITORING OF A WELDING PROCESS
    Publication number: 20080210674
    Abstract: Disclosed is the design and working principle of a welding monitoring system that can monitor the spectra of zinc and iron in the plasma generated during a welding process involving zinc-coated steel. The monitoring system is capable of monitoring multiple parameters, including spectral line intensity, electron temperature, and ratio of zinc and iron composition in the plasma. The results can then be used individually or in combination to predict resulting weld quality and generate appropriate feedback control signals.
    Type: Application
    Filed: December 6, 2007
    Publication date: September 4, 2008
    Inventors: Jyoti Mazumder, Ashish K. Dasgupta, Mikhail Vasilyev