Patents by Inventor Enrico FEDERIGHI

Enrico FEDERIGHI 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).

  • Turbine with a shroud ring around rotor blades and method of limiting leakage of working fluid in a turbine
    Patent number: 11976561
    Abstract: A gas (or steam) turbine is disclosed including: a rotor with at least one array of rotor blades, a stator with a casing and a shroud ring; the shroud ring extends around the array of blades rotor and the casing extends around the shroud ring. The shroud ring has radial size independent from temperature due to its material and is movably coupled with the casing so to allow the casing of the stator to thermally expand and contract during operation of the turbine while maintaining the shroud ring radial size. Also, the rotor thermally expands and contracts during operation of the turbine, and, at working temperature, tip regions of the rotor blades are in close proximity to an inner region of the shroud ring so that clearance is small or zero at working condition.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: May 7, 2024
    Assignee: Nuovo Pignone Tecnologie—S.R.L.
    Inventors: Antonio Asti, Leonardo Tognarelli, Simone Marchetti, David Gentile, Enrico Federighi
  • TURBINE WITH A SHROUD RING AROUND ROTOR BLADES AND METHOD OF LIMITING LEAKAGE OF WORKING FLUID IN A TURBINE
    Publication number: 20220090510
    Abstract: A gas (or steam) turbine is disclosed including: a rotor with at least one array of rotor blades, a stator with a casing and a shroud ring; the shroud ring extends around the array of blades rotor and the casing extends around the shroud ring. The shroud ring has radial size independent from temperature due to its material and is movably coupled with the casing so to allow the casing of the stator to thermally expand and contract during operation of the turbine while maintaining the shroud ring radial size. Also, the rotor thermally expands and contracts during operation of the turbine, and, at working temperature, tip regions of the rotor blades are in close proximity to an inner region of the shroud ring so that clearance is small or zero at working condition.
    Type: Application
    Filed: January 24, 2020
    Publication date: March 24, 2022
    Inventors: Antonio ASTI, Leonardo TOGNARELLI, Simone MARCHETTI, David GENTILE, Enrico FEDERIGHI