Patents by Inventor Robert M. Hammell

Robert M. Hammell 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).

  • Patent number: 6685003
    Abstract: A pulse free escalator system has two spaced apart pulse free turnaround sections and at least one pulse-free transition zone. A method of designing the turnaround sections and the at least one transition zone is described herein. The escalator system has a pair of guide tracks and a pair of linkage assemblies, each comprising a plurality of links joined together. Each linkage assembly has a plurality of rollers for supporting the linkage assembly which travel in a respective one of the guide tracks. Each guide track has two spaced apart turnaround portions with each turnaround portion defining a travel path for each roller having a linear entry section, a linear exit section, and a pulse-free section intermediate the two sections.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: February 3, 2004
    Assignee: Otis Elevator Company
    Inventors: George Scott Copeland, Timothy P. Galante, Richard N. Fargo, Robert M. Hammell
  • Publication number: 20030121756
    Abstract: The present invention relates to a pulse free escalator system having two spaced apart pulse free turnaround sections and at least one pulse-free transition zone and to a method of designing the turnaround sections and the at least one transition zone. The escalator system has a pair of guide tracks and a pair of linkage assemblies, each comprising a plurality of links joined together. Each linkage assembly has a plurality of rollers for supporting the linkage assembly which travel in a respective one of the guide tracks. Each guide track has two spaced apart turnaround portions with each turnaround portion defining a travel path for each roller having a linear entry section, a linear exit section, and a pulse-free section intermediate said two sections.
    Type: Application
    Filed: December 28, 2001
    Publication date: July 3, 2003
    Inventors: George Scott Copeland, Timothy P. Galante, Richard N. Fargo, Robert M. Hammell