Patents by Inventor Jean-Pierre van Rooy

Jean-Pierre van Rooy 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).

  • Adapting escalator speed to traffic using fuzzy logic
    Patent number: 5564550
    Abstract: In one embodiment, fuzzy sets indicative of the degree to which the time since the last passenger boarded an escalator can be deemed to be zero, a very long time, or something in between, are combined with fuzzy sets indicative of the extent to which the maximum number of passengers in a recent temporal or cyclic period can be deemed to be a zero passenger, a very large group, or something in between. In another embodiment, fuzzy sets indicative of the degree to which the time since the last passenger exited an empty escalator can be deemed to be nearly zero, a very long time, or something in between, are combined with fuzzy sets indicative of the degree to which the maximum group of passengers on the escalator at any time since the last time it was empty can be deemed to be a single passenger, a very large group, or something in between.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: October 15, 1996
    Assignee: Otis Elevator Company
    Inventors: Jean-Pierre van Rooy, Joseph Bittar, David J. Sirag, Jr., Bruce A. Powell