Patents by Inventor Harald Nathmann

Harald Nathmann 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).

  • Chair, in particular office chair
    Patent number: 5797653
    Abstract: A chair, in particular an office chair, has a so-called synchronous mechanism in the form of a front seat support member stationary in relation to a chair column and a rear seat support member pivotable about a pivot axle in relation to the front seat support member and bearing a back-rest. A seat supports itself on the two seat support members. A blocking lever of a blocking mechanism and having a stop face is articulated on the rear seat support member at a distance from the pivot axle. This stop face is moved by gravity into engagement with a blocking face stationary in relation to the front seat support member. For releasing this locking, the blocking lever is lifted by a blocking actuator arm.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: August 25, 1998
    Assignee: Dauphin Entwicklungs - u. Beteiligungs-GmbH
    Inventors: Manfred Elzenbeck, Klaus Haar, Harald Nathmann
  • Chair, in particular office chair
    Patent number: 5564783
    Abstract: A chair has a chair column on which a front seat support member is fixed. A rear seat support member provided with a back-rest support for a back-rest is joined to the front seat support member by a pivot axle. A seat is supported on the two seat support members. The seat is supported in relation to the rear seat support member by a supporting axle, which is adjustable in height relative to the rear seat support member by a seat pitch adjuster. The seat pitch adjuster can be a retrofit kit.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: October 15, 1996
    Assignee: Duphin Entwicklungs-u. Beteiligungs-GmbH
    Inventors: Manfred Elzenbeck, Klaus Haar, Harald Nathmann