Patents by Inventor Peter Krichau

Peter Krichau 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).

  • Method and a pipe element for providing a radially outwards directed bead at the end rim of a pipe
    Patent number: 5649662
    Abstract: In this method a short pipe element (2) with a radially outwards directed bead (3) at its end rim (4) is inserted into a pipe, and a radially outwards directed bead (7, 8) is rolled in the other end (5) of the pipe element (2) and in the pipe (1), such that the pipe element is fixed inside the pipe. The pipe element (2) may before insertion into the pipe be provided with at least two radially outwards directed beads (9, 10), causing the pipe element after insertion to be tightly clamped and fixed inside the pipe, and the pipe element (2) may over a part of its outer surface be coated with a sealing material (13).
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: July 22, 1997
    Assignee: Lindab A/S
    Inventors: Peter Krichau, Werner J. Andresen