Patents by Inventor Vivek R. Dave'

Vivek R. Dave' 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: 8359979
    Abstract: A projectile formed from dissimilar materials. The projectile includes a metallurgical interlayer that joins the dissimilar materials together. The metallurgical interlayer also matches the shock impedance of the two materials to prevent delamination during launch and during impact.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: January 29, 2013
    Assignee: B6 Sigma, Inc.
    Inventors: Vivek R. Dave, Mark J. Cola, Daniel A. Hartman, C. Robert Kline, Jr., Joel W. House, Geremy Jason Kleiser
  • Patent number: 8354608
    Abstract: A new method of process control for fusion welding maintains a controlled weld pool size or volume, for example in some applications a substantially constant weld pool size or volume. The invention comprises a method of linking machine and process variables to the weld pool size or volume in real time, thereby enabling constant weld pool volume control. The invention further comprises a method of using thermal inverse models to rapidly process real-time data and enable models-based control of welding processes so as to implement constant weld pool volume control.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: January 15, 2013
    Assignee: B6 Sigma, Inc.
    Inventors: Vivek R Dave, Mark J Cola
  • Publication number: 20100288734
    Abstract: A new method of process control for fusion welding maintains a controlled weld pool size or volume, for example in some applications a substantially constant weld pool size or volume. The invention comprises a method of linking machine and process variables to the weld pool size or volume in real time, thereby enabling constant weld pool volume control. The invention further comprises a method of using thermal inverse models to rapidly process real-time data and enable models-based control of welding processes so as to implement constant weld pool volume control.
    Type: Application
    Filed: May 14, 2010
    Publication date: November 18, 2010
    Inventors: Vivek R. Dave, Mark J. Cola
  • Publication number: 20100229751
    Abstract: The present inventions provide methods of manufacturing methods for case metallic materials for munitions that have high enthalpic energy release and controlled fragmentation and breakup enabling fragment speeds up to twice what is otherwise possible in explosively driven metal systems, and munitions made by such methods. Embodiments of the invention involve the thixotropic processing of energetic materials such as aluminum together with high density materials such as tantalum or tungsten to achieve material microstructures with a bulk density equivalent to steel, but with the energy release potential of materials such as finely dispersed aluminum powders.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 16, 2010
    Inventors: Vivek R. Dave, Mark J. Cola, Robert E. Swanson, Daniel Hartman
  • Patent number: 6917010
    Abstract: The present invention includes a method for brazing of two objects or heat treatment of one object. First, object or objects to be treated are selected and initial conditions establishing a relative geometry and material characteristics are determined. Then, a first design of an optical system for directing heat energy onto the object or objects is determined. The initial conditions and first design of the optical system are then input into a optical ray-tracing computer program. The program is then run to produce a representative output of the heat energy input distribution to the object or objects. The geometry of the object or objects, material characteristics, and optical system design are then adjusted until an desired heat input is determined.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: July 12, 2005
    Assignee: The Regents of the University of California
    Inventors: John O. Milewski, Vivek R. Daveā€², Dane Christensen, Robert W. Carpenter, II
  • Patent number: 6857553
    Abstract: A method for determining the quality of an examined weld joint comprising the steps of providing acoustical data from the examined weld joint, and performing a neural network operation on the acoustical data determine the quality of the examined weld joint produced by a friction weld process. The neural network may be trained by the steps of providing acoustical data and observable data from at least one test weld joint, and training the neural network based on the acoustical data and observable data to form a trained neural network so that the trained neural network is capable of determining the quality of a examined weld joint based on acoustical data from the examined weld joint. In addition, an apparatus having a housing, acoustical sensors mounted therein, and means for mounting the housing on a friction weld device so that the acoustical sensors do not contact the weld joint. The apparatus may sample the acoustical data necessary for the neural network to determine the quality of a weld joint.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: February 22, 2005
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Daniel A. Hartman, Vivek R. Dave' , Mark J. Cola, Robert W. Carpenter
  • Publication number: 20030201252
    Abstract: The present invention includes a method for brazing of two objects or heat treatment of one object. First, object or objects to be treated are selected and initial conditions establishing a relative geometry and material characteristics are determined. Then, a first design of an optical system for directing heat energy onto the object or objects is determined. The initial conditions and first design of the optical system are then input into a optical ray-tracing computer program. The program is then run to produce a representative output of the heat energy input distribution to the object or objects. The geometry of the object or objects, material characteristics, and optical system design are then adjusted until an desired heat input is determined.
    Type: Application
    Filed: April 29, 2003
    Publication date: October 30, 2003
    Inventors: John O. Milewski, Vivek R. Dave', Dane Christensen, Robert W. Carpenter
  • Publication number: 20020139781
    Abstract: There has been invented a method and apparatus for heat treating or brazing joints in metals and ceramics using an optical concentrator (reflecting waveguide) to reflect energy from infrared energy heat sources, in a pattern which will provide precisely tailored illumination, heating, melting of filler and fusion of the area to be heat treated or the joint to be formed. CAD optical ray tracing software is used to custom design the reflecting waveguides for directing the energy as needed. With the invention, shorter, reduced energy heat cycles can be used to produce reliable accurate brazes, including brazes to join small diameter tubes. No furnace is necessary because localized small area brazing can be done in situ with the invention method and apparatus. Various heat sources can be used to braze various geometries, including very small diameter tubes.
    Type: Application
    Filed: February 1, 2001
    Publication date: October 3, 2002
    Inventors: John O. Milewski, Vivek R. Dave, Dane Christensen, Robert W. Carpenter