Patents by Inventor Bernhard Wietek

Bernhard Wietek 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: 5403550
    Abstract: An electrode for determining corrosion of metal reinforcement in concrete includes a wire surrounded by insulation and made of a metal which is more electro-positive than a metal reinforcement. An electrically active part of the wire is in electrolytic contact with moisture in concrete surrounding the reinforcement. The insulation is disposed along the whole of the electrically active part of the wire in such a way that the insulation keeps this part of the wire separated from the reinforcement and galvanically insulated therefrom.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: April 4, 1995
    Inventor: Bernhard Wietek
  • Patent number: 5087346
    Abstract: A sheathing pipe for an anti-corrosion rod of steel is described, in which the inside of the sheathing pipe has at least one electrode that can make electrical contact with the outside.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: February 11, 1992
    Inventor: Bernhard Wietek
  • Patent number: 4639168
    Abstract: To lower ground water in the region of foundation bodies, such as foundation piles and the like, a water-pervious layer of filtering concrete, in particular of uniform-grained concrete, is arranged below an upper water-impervious part which is made of standard concrete. From this layer the entering ground water is sucked through a pipe which extends through the foundation body and is designed as a water-pervious filter pipe in the region of the layer of filtering concrete. The layer of filtering concrete is preferably reinforced by reinforcing irons. After lowering of the ground water level, the filtering concrete is injected with a hardenable injection material, thus enabling the lower end of the foundation body to better absorb the pressures transmitted from the upper part.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: January 27, 1987
    Inventor: Bernhard Wietek