Patents by Inventor Robert James Logemann

Robert James Logemann 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).

  • Special emergency service control arrangement for elevator car
    Patent number: 5780788
    Abstract: An electronic controller arrangement for an elevator car includes an auxiliary controller including instructions for disconnecting a main operational controller from a door operator when either a Phase I (emergency car recall operation); or a Phase II (in-car operation during emergency); special emergency service signal is detected by the auxiliary controller and for performing all door control operations during the Phase I or Phase II emergency condition.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: July 14, 1998
    Assignee: Otis Elevator Company
    Inventors: John Michael Eschenbrenner, Robert James Logemann