Patents by Inventor Robert Mashiak

Robert Mashiak 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).

  • Monitoring of elevator door performance
    Patent number: 5760350
    Abstract: An apparatus and method for providing an elevator door performance result of an elevator door in an elevator door system which normally operates sequentially from state-to-state in a closed loop sequential chain of normal operating states is disclosed. A plurality of parameter signals provided by the elevator door system is monitored by the apparatus. The apparatus comprises: a door state sequencer for providing a performance measure; a module for providing a reference measure and an acceptable range; and an abnormal detection module for analyzing the door performance measure.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: June 2, 1998
    Assignee: Otis Elevator Company
    Inventors: Ronald R. Pepin, Robert Mashiak, Sanjay Kamani, Patrick Lusaka, Jean-Marie Rennetaud