Patents by Inventor Frank M. Sansevero

Frank M. Sansevero 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).

  • Curved escalator with fixed center constant radius path of travel
    Patent number: 4883160
    Abstract: An escalator is provided with a curved path of travel from its entry to its exit landings. The path of travel of the escalator steps as seen in plan is a curve having a fixed center and a constant radius from landing to landing. In elevation, each landing portion will be disposed in vertically spaced horizontal planes, and there will be a medial constant slope ascending or descending portion. Interconnecting each landing portion with the constant slope portion will be entry and exit transitional curved portions of varying slope as seen in the elevational view. To enable the steps to traverse the curved path successfully, the effective length of the outer of the step chains is varied at different points along the path of travel of the escalator.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: November 28, 1989
    Assignee: Otis Elevator Company
    Inventors: Frank M. Sansevero, Klaus Seehausen, James A. Rivera, Dat Nguyen, Peter Borchers