Patents by Inventor Dieter Hellmann

Dieter Hellmann 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: 6273677
    Abstract: A centrifugal pump having an axial inlet and an inflow guide device mounted upstream of the impeller, which guide device is composed of several fixed guide vanes, which on the side facing the impeller each have an edge pointing in or opposite to the direction of rotation of the impeller. The edge pointing in or opposite to the direction of rotation may take the form of a swirl blade (8) which is formed on the guide vane (6) and located in the vicinity of the wall of the inlet (2), and which has a shorter radial length than the guide vane (6). This increases the efficiency of the pump and achieves an effect which increases the breadth of applicability of the pump.
    Type: Grant
    Filed: November 29, 1999
    Date of Patent: August 14, 2001
    Assignee: KSB Aktiengesellschaft
    Inventors: Baogang Wang, Juergen Schill, Dieter Hellmann
  • Patent number: 4732554
    Abstract: An apparatus for removing injection molded articles from an opened injection mold of an injection molding machine. The apparatus has a low structural weight and provides exact control of the movements of a grasping member for grasping the injection molded articles. The apparatus has a guide bed and a carriage movably mounted on the guide bed. The guide bed is aligned parallel to the direction of operation of the closing unit of the injection mold. The carriage includes a cantilever which extends transversely of the guide bed. The cantilever carries a slide member longitudinally movable on the cantilever. An adjustable support member is mounted on the slide member. The grasping member is mounted at the lower end of the support member. The grasping member is adjustable relative to the support member about at least two joints extending perpendicularly to each other.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: March 22, 1988
    Assignee: Battenfeld Maschinenfabriken GmbH
    Inventor: Dieter Hellmann