Patents by Inventor Svan Busch

Svan Busch 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).

  • Electrohydraulic servo door drive for operating a door, a window, etc.
    Patent number: 6978609
    Abstract: The invention pertains to an electrohydraulic servo door drive for operating a door, a window, or the like, with a hold-open function, where a valve is installed in the hydraulic circuit to implement the hold-open function. To create an electrohydraulic servo door drive which requires less space and can be produced at lower cost, it is provided according to the invention that the valve is designed as a hydraulically controlled hold-open valve.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: December 27, 2005
    Assignee: Dorma GmbH + Co. KG
    Inventor: Svan Busch
  • Electrohydraulic servo door drive for operating a door, a window, etc.
    Publication number: 20040182234
    Abstract: The invention pertains to an electrohydraulic servo door drive for operating a door, a window, or the like, with a hold-open function, where a valve is installed in the hydraulic circuit to implement the hold-open function. To create an electrohydraulic servo door drive which requires less space and can be produced at lower cost, it is provided according to the invention that the valve is designed as a hydraulically controlled hold-open valve.
    Type: Application
    Filed: December 16, 2003
    Publication date: September 23, 2004
    Applicant: Dorma GmbH + Co. KG
    Inventor: Svan Busch