Patents by Inventor Siegfried Schaper

Siegfried Schaper 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: 5156041
    Abstract: Methods and apparatus for determining the permeation behavior of foreign fluid molecules into solids whereby the results are typically obtained in less than one day. In a principal embodiment, information about the relationship between the saturation concentration and the diffusion constant of the solid is obtained by subjecting a first, thick, sample of the solid to the foreign fluid substance, which has been radioactively-tagged with a class C isotope, for a short diffusion time interval. The penetrated foreign substance is then washed out of the thick sample with an untagged solvent and the resulting solution is then analyzed to determine the quantity of the foreign substance that has diffused into the thick sample for the diffusion time. A second, thin, sample of the solid is prepared, and analyzed in a series of steps analogous to the thick, sample, whereby information concerning the saturation concentration, individually, is obtained.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: October 20, 1992
    Assignee: Audi, AG
    Inventors: Siegfried Schaper, Martin Winterkorn, Hans G. Haldenwanger, Jurgen Kalus, Harald Kaul
  • Patent number: 4929315
    Abstract: A process for galvanic coating of a selected area on a preform, comprising applying an electrically conducting metallic primer to substantially the entire surface of the preform; masking a portion of the surface coated leaving exposed an unmasked portion not to be coated; forming a clear coat to the exposed portion not to be galvanized; removing the mask to expose the portion of the surface not clear coated; and galvanically coating the area of metallic primer.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: May 29, 1990
    Assignee: Audi AG
    Inventors: Siegfried Schaper, Martin Seufert
  • Patent number: 4830810
    Abstract: A novel method of blow molding and fluorinating plastic containers carried out in essentially three steps, including blow molding of the container at a first predetermined pressure in a mechanically locked mold with an inert gas, testing the mold for pressure tightness at a second higher level of pressure with an inert gas, and thereafter introducing a fluorine containing gas into the mold at a third level of pressure.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: May 16, 1989
    Assignee: Audi AG.
    Inventors: Peter Ufer, Siegfried Schaper, Hans-Gunther Haldenwanger, Ingrid Paulus
  • Patent number: 4771997
    Abstract: The disclosure relates to a device with a flat component made of fiber-reinforced synthetic material and an end power induction unit, in particular a leaf spring or transverse link for motor vehicles. The flat component essentially enters the power induction unit without a change in fiber direction and is contained therein by a clamp. The contact point on the power induction unit is displaced by a distance "a", asymmetrically to the fiber levels such that a resultant of perpendicular forces and forces acting parallel to the fiber direction cause a reduction in stress and momentary relief. The portion of the flat component in the power induction unit has a length, using the perpendicular projection of the point of application of force, that is at least two-thirds of the length from the point of application of force to the resultant in the fiber plane or at least corresponds to quantity "a".
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: September 20, 1988
    Assignee: Audi AG
    Inventors: Hans-Gunther Haldenwanger, Manfred Schneeweiss, Siegfried Schaper
  • Patent number: 4450610
    Abstract: A piston composed at least in part of fiber-reinforced synthetic resin material, is provided with a piston base or bottom, a piston shaft or shank, and eyes for engagement with a member to be driven by or for driving the piston. According to the method of this invention, the piston bottom and piston shaft are fabricated separately and are form-fittingly interconnected while the eyes are enclosed in a body which is fixed to the piston shaft and abuts at opposite end this shaft and the piston bottom. At least this body and the shaft are formed by a winding of fiber roving impregnated with hardenable synthetic.
    Type: Grant
    Filed: October 22, 1981
    Date of Patent: May 29, 1984
    Assignee: Audi Nsu Auto Union Aktiengesellschaft
    Inventor: Siegfried Schaper
  • Patent number: 4408380
    Abstract: A method of making a connecting rod for an internal combustion engine having a one-piece crankshaft construction generally consisting of positioning a first crankpin bushing segment having a connecting rod shank consisting of a reinforced resinous material mounted thereon, on a crankpin of the crankshaft, positioning a second crankpin bushing segment on the crankpin, and applying a reinforcing material and a resinous material about a periphery of the connecting rod shank and the second crankpin bushing segment to form an integral unit consisting of the crankpin bushing segments embedded in the connecting rod shank, attached to the crankpin.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: October 11, 1983
    Assignee: Audi NSU Auto Union Aktiengesellschaft
    Inventors: Siegfried Schaper, Anton Wimmer, Werner Dommes