Patents by Inventor Brian J. Bert

Brian J. Bert 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).

  • Door latch
    Patent number: 4819976
    Abstract: A door latch mechanism mounts on a door for selectively engaging a door strike. A latch bolt moves along a line of action to disengage the strike and allow the door to be opened. A dead lock prevents unwanted opening of the door and includes a blocking element to prevent movement of the latch bolt along its line of action. A release enables the latch bolt to move along its line of action and includes a bell crank for displacing the blocking element whereby the latch bolt can disengage the strike.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: April 11, 1989
    Assignee: American Device Manufacturing Company
    Inventor: Brian J. Bert