Patents by Inventor Hermann Haarkotter

Hermann Haarkotter 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: 4660811
    Abstract: A spring according to this invention has a core of an elastically deformable but substantially incompressible material and having two axially spaced end surfaces operatively engageable with objects to be relatively resiliently mounted. Thus when the two bodies engaging the end surfaces move toward each other the core swells radially. An annular belt formed of an elastic synthetic resin snugly surrounds the core between its ends. The belt can be lapped or can be a single unitary ring. It may also be formed of a plurality of independent layers having ends provided with a heat-shrunk clip for securing the ends together. To soften the initial spring characteristic the belt is corrugated and has peaks engaging the core and valleys normally not engaging the core. The corrugations may run longitudinally or transversely.
    Type: Grant
    Filed: August 7, 1985
    Date of Patent: April 28, 1987
    Assignee: Ringfeder GmbH
    Inventors: Dieter Muhlhahn, Gino Marsella, Friedhelm Detzner, Dieter Simons, Horst-Dieter Schafer, Hermann Haarkotter
  • Patent number: 4025213
    Abstract: An inner annular member of the arrangement surrounds the shaft and has an outer circumferential face two sections of which conically taper in mutually opposite directions. The inner annular member is also provided with a radially outward extending collar intermediate these sections. A pair of outer annular members each surround one of the sections with clearance and have an exterior cylindrical surface and an interior surface having a taper opposite to that of the respective section to form therewith a wedge-shaped annular clearance. The outer annular members abut from opposite axial ends against the collar. Tension members are received in the respective clearance and are drawn by both or the like inwardly of the clearance so as to force the inner member against the shaft and to the outer members against the surrounding hub, thus coupling the hub and the shaft for joint movement.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: May 24, 1977
    Assignee: Ringfeder GmbH
    Inventors: Horst-Dieter Schafer, Manfred Witzel, Paul Loosen, Hermann Haarkotter