Patents by Inventor Fred Spielman

Fred Spielman 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).

  • Passenger conveyor step having an acoustic barrier
    Patent number: 7726459
    Abstract: An escalator step (12) includes a sound barrier material (40) covering over at least a portion of an inner surface (42) of a tread portion(30) and an inner surface (44) of a rise portion (32). In one example, the sound barrier material (40) comprises a sheet of vinyl. The sound barrier material (40) reduces noise radiation from the step (12) toward a cavity (26) within a passenger conveyor support structure (20) and reduces noise emanations from the cavity (26) through the steps (12). Several embodiments for securing the sound barrier material (40) in place are disclosed.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: June 1, 2010
    Assignee: Otis Elevator Company
    Inventors: Vijay Jayachandran, Goldino Alves, Dave Jarvis, Fred Spielman