Patents by Inventor Giovanni Bertoldo

Giovanni Bertoldo 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: 5369912
    Abstract: A door which can be automatically opened and closed can have an additional releasable connection for allowing the door panels to be manually opened by disengaging the door panels from the device for automatically opening and closing the doors. In particular, two-panel doors which execute a combined sliding and rotational motion around a vertical axis of rotation during the closing and opening motion can be configured with such a device to make it possible to use the doors in evacuation and emergency routes, i.e. routes in which a manual force can be applied from inside to open the door panels. Further, so that the door does not remain open, there can also preferably be switches or circuits in the construction which indicate that a manual opening of the door panels has occurred, in which case an electronic signal can be generated to place the drive device in motion, to thereby automatically restore the connection between the door panels and the drive system.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: December 6, 1994
    Assignee: Dorma GmbH + Co. KG
    Inventors: Lothar Ginzel, Giovanni Bertoldo