Patents by Inventor Girija Marathe

Girija Marathe 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).

  • Elevator system safety brake
    Patent number: 12103822
    Abstract: A braking mechanism includes a wedge selectably engageable with a guide rail, and a frictional surface defined on the wedge configured for selective engagement with the guide rail in an overspeed condition. The frictional surface includes a friction coating of polycrystalline blocky diamond material. An elevator system includes an elevator car, a guide rail along which the elevator car travels, and a braking mechanism located at the elevator car and selectably engageable with the guide rail to slow or stop travel of the elevator car along the guide rail. The braking mechanism includes a wedge having a frictional surface configured for selective engagement with the guide rail in an overspeed condition. The frictional surface includes a friction coating of polycrystalline blocky diamond material.
    Type: Grant
    Filed: September 27, 2022
    Date of Patent: October 1, 2024
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Girija Marathe, David R. Torlai
  • ELEVATOR SYSTEM SAFETY BRAKE
    Publication number: 20240101392
    Abstract: A braking mechanism includes a wedge selectably engageable with a guide rail, and a frictional surface defined on the wedge configured for selective engagement with the guide rail in an overspeed condition. The frictional surface includes a friction coating of polycrystalline blocky diamond material. An elevator system includes an elevator car, a guide rail along which the elevator car travels, and a braking mechanism located at the elevator car and selectably engageable with the guide rail to slow or stop travel of the elevator car along the guide rail. The braking mechanism includes a wedge having a frictional surface configured for selective engagement with the guide rail in an overspeed condition. The frictional surface includes a friction coating of polycrystalline blocky diamond material.
    Type: Application
    Filed: September 27, 2022
    Publication date: March 28, 2024
    Inventors: Girija Marathe, David R. Torlai