Patents by Inventor Jagannath Pranatharthikaran

Jagannath Pranatharthikaran 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).

  • Non-contact seal for rotational equipment with axially expended seal shoes
    Patent number: 11619309
    Abstract: An assembly is provided for rotational equipment. This rotational equipment assembly includes a plurality of seal shoes, a seal base, a plurality of spring elements and a secondary seal assembly. The seal shoes are arranged circumferentially about an axial centerline in an annular array. The seal shoes include a first seal shoe. The seal base circumscribes the annular array. The spring elements include a first spring element. The first spring element connects and extends between the first seal shoe and the seal base. The secondary seal assembly is configured to seal a gap between the seal base and the seal shoes. An axial end portion of the first seal shoe projects axially along the axial centerline, in a direction away from the first spring element, beyond the secondary seal assembly.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: April 4, 2023
    Assignee: Raytheon Technologies Corporation
    Inventors: Eric A. Grover, Jagannath Pranatharthikaran
  • NON-CONTACT SEAL FOR ROTATIONAL EQUIPMENT WITH AXIALLY EXTENDED SEAL SHOES
    Publication number: 20220065351
    Abstract: An assembly is provided for rotational equipment. This rotational equipment assembly includes a plurality of seal shoes, a seal base, a plurality of spring elements and a secondary seal assembly. The seal shoes are arranged circumferentially about an axial centerline in an annular array. The seal shoes include a first seal shoe. The seal base circumscribes the annular array. The spring elements include a first spring element. The first spring element connects and extends between the first seal shoe and the seal base. The secondary seal assembly is configured to seal a gap between the seal base and the seal shoes. An axial end portion of the first seal shoe projects axially along the axial centerline, in a direction away from the first spring element, beyond the secondary seal assembly.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 3, 2022
    Inventors: Eric A. Grover, Jagannath Pranatharthikaran
  • Controlled contact surface for a secondary seal in a non-contact seal assembly
    Patent number: 11230940
    Abstract: A rotational equipment assembly includes a plurality of seal shoes, a seal base, a plurality of spring elements and a secondary seal assembly. The seal shoes are arranged circumferentially around an axial centerline and include a first seal shoe. The first seal shoe includes a first seal shoe base and a first seal shoe rib that projects axially out from the first seal shoe base to an axial distal end of the first seal shoe rib. The seal base extends circumferentially around the axial centerline. The spring elements include a first spring element that connects and extends between the first seal shoe and the seal base. The secondary seal assembly is configured to seal a gap between the seal base and the seal shoes. The secondary seal assembly includes a free floating seal plate that axially contacts and is configured to slide radially along the first seal shoe rib.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: January 25, 2022
    Assignee: Raytheon Technologies Corporation
    Inventors: Michael G. McCaffrey, Joseph D. Evetts, Kristine M. Carnavos, Conway Chuong, Christopher W. Robak, William Proscia, Purity Dele-Oni, Caroline Karanian, John E. Paul, Jagannath Pranatharthikaran