Patents by Inventor Arne Liebscher

Arne Liebscher 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).

  • Publication number: 20040107642
    Abstract: The invention pertains to a sliding door system with at least one automatically driven sliding leaf, which is guided on a traveling carriage and a support profile, where the drive and a runway rail are mounted in a housing above the sliding leaf, and where the sliding leaf can be swung open if necessary in the outward direction around a vertical axis. To create a sliding door system which ensures a reliable and effective sealing function, especially with respect to smoke and fire, which is suitable for use in escape and rescue routes, and which can be used anywhere, regardless of the structural conditions, the sliding leaf, when in the closed position, has sealing-devices, which are active at all times, on all horizontal and vertical edges.
    Type: Application
    Filed: April 14, 2003
    Publication date: June 10, 2004
    Applicant: DORMA GmbH + Co. KG
    Inventor: Arne Liebscher
  • Patent number: 6283189
    Abstract: An emergency opening device for a swinging folding door or a swinging folding gate, using an electric motor drive with a switchable electromagnetic coupling for closing and opening the door panels. The door has an emergency opening device, whereby the emergency opening device consists of an elastic tension or compression device to which a pre-load can be applied during the closing of the door. The tension or compression device can be engaged in the drive shaft of the outer panel or in the vicinity of the main closing edge of the inner panel.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: September 4, 2001
    Assignee: DORMA GmbH +Co. KG
    Inventor: Arne Liebscher