Patents by Inventor Nicholas Kassetas

Nicholas Kassetas 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).

  • Light barrier for reopening elevator doors
    Patent number: 5627439
    Abstract: An apparatus for detecting an object adjacent an elevator door includes a housing (47) mounted at an upper edge of a car door opening (38) and in which are mounted a plurality of short range detector pairs (50) and a plurality of long range detector pairs (53). Each short range detector pair includes a transmitter (14,25,40) for generating a relatively short range infrared beam (18,27,42) toward a path of travel (16) of an elevator door (17) across the door opening and a short range receiver (15,26,41) for detecting a reflection (31) of the beam from a facing surface (17b) of the door and generating a short range beam detection signal.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: May 6, 1997
    Assignee: Inventio AG
    Inventors: Richard A. Gregory, Nicholas Kassetas