Patents by Inventor Shikha Pokharel

Shikha Pokharel 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: 11511976
    Abstract: A system for determining a lifting capacity of a pipelayer is provided. The system includes a load sensor configured to generate a signal indicative of a load suspended from a lifting hook, an angle sensor configured to generate a signal indicative of an angular position of a chassis relative to ground surface, a boom position sensor configured to generate a signal indicative of a position of a boom relative to an undercarriage, and a counterweight position sensor configured to generate a signal indicative of a position of a counterweight relative to the undercarriage. The system further includes a controller configured to receive the signal from each of the load sensor, the angle sensor, the boom position sensor, and the counterweight position sensor. The controller is also configured to determine the lifting capacity of the pipelayer based, at least in part, on the received signal.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: November 29, 2022
    Assignee: Caterpillar Inc.
    Inventors: Curtis John Caldwell, Sean D. Lawson, Robert Jackson, Shikha Pokharel Thapa, Aaron Gnagey
  • Publication number: 20210101788
    Abstract: A system for determining a lifting capacity of a pipelayer is provided. The system includes a load sensor configured to generate a signal indicative of a load suspended from a lifting hook, an angle sensor configured to generate a signal indicative of an angular position of a chassis relative to ground surface, a boom position sensor configured to generate a signal indicative of a position of a boom relative to an undercarriage, and a counterweight position sensor configured to generate a signal indicative of a position of a counterweight relative to the undercarriage. The system further includes a controller configured to receive the signal from each of the load sensor, the angle sensor, the boom position sensor, and the counterweight position sensor. The controller is also configured to determine the lifting capacity of the pipelayer based, at least in part, on the received signal.
    Type: Application
    Filed: October 7, 2019
    Publication date: April 8, 2021
    Applicant: Caterpillar Inc.
    Inventors: Curtis John Caldwell, Sean D. Lawson, Robert Jackson, Shikha Pokharel Thapa, Aaron Gnagey
  • Publication number: 20160201535
    Abstract: A method is provided for calibrating an after-treatment system retrofitted onto an engine, the after-treatment system including a Selective Catalytic Reduction (SCR) device therein. The method is implemented using a controller having a memory pre-fed with an Engine-out NOx map, a SCR conversion map, a maximum SCR capability map, and a NOx dosing map corresponding to bench-run conditions for the given engine and the after-treatment system configurations. The method includes updating the Engine-out NOx map, the SCR conversion map, the maximum SCR capability map, and the NOx dosing map by the controller on the basis of actual sensed parameters of an exhaust stream associated with operation of the given engine and after-treatment system. The method further includes directing the controller to vary a feed-forward reductant dosing quantity at the SCR device during a subsequent operation of the engine based on the updated NOx dosing map stored at the controller.
    Type: Application
    Filed: March 21, 2016
    Publication date: July 14, 2016
    Applicant: Caterpillar Inc.
    Inventors: Shikha Pokharel, James Harris Mutti, JR., Matthew Jay Segebart