Patents by Inventor Joseph H. Marshall

Joseph H. Marshall 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).

  • Elevator door interlock assembly
    Patent number: 11780710
    Abstract: A novel elevator door interlock assembly configured for use in an elevator having a swing door is provided. The elevator door interlock further configured to enable use of the elevator and disable use of the elevator. The novel elevator door interlock including a mounting plate configured for attachment to a surface of a swing door frame. An interlock module is attached to the mounting plate and configured to facilitate locking and unlocking of the swing door. A latch bracket is attached to the swing door and configured for insertion into a cavity formed within the interlock module. The combination of the mounting plate and the interlock module have a maximum thickness of 0.75 inches.
    Type: Grant
    Filed: March 24, 2023
    Date of Patent: October 10, 2023
    Assignee: Atlas Elevator Components, Inc.
    Inventors: Andrew Darnley, III, Susan M. Siegmann, Joseph H. Marshall, Jesse S. Duncan
  • ELEVATOR DOOR INTERLOCK ASSEMBLY
    Publication number: 20230303363
    Abstract: A novel elevator door interlock assembly configured for use in an elevator having a swing door is provided. The elevator door interlock further configured to enable use of the elevator and disable use of the elevator. The novel elevator door interlock including a mounting plate configured for attachment to a surface of a swing door frame. An interlock module is attached to the mounting plate and configured to facilitate locking and unlocking of the swing door. A latch bracket is attached to the swing door and configured for insertion into a cavity formed within the interlock module. The combination of the mounting plate and the interlock module have a maximum thickness of 0.75 inches.
    Type: Application
    Filed: March 24, 2023
    Publication date: September 28, 2023
    Inventors: Andrew Darnley, III, Susan M. Siegmann, Joseph H. Marshall, Jesse S. Duncan