Patents by Inventor York A. Wahrendorf

York A. Wahrendorf 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).

  • Earth retaining wall of vertically stacked chevron shaped concrete blocks
    Patent number: 4193718
    Abstract: An earth retaining wall formed by stacked, alternately staggered rows of spaced, nesting, chevron-shaped concrete blocks. Adjacent blocks in some rows are coupled together by connecting tubes extending into holes through the blocks, and elongated anchoring devices are connected to the tubes and extend horizontally into the earth. Alternatively, the anchoring devices may be concrete extensions integrally moulded with the blocks.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: March 18, 1980
    Assignee: SF-Vollverbundstein-Kooperation GmbH
    Inventors: York A. Wahrendorf, Herbert K. Frenzel, Adolf K. Ambrosch, Knud A. Rasmussen, Horst Seibert, Horst J. Dieckmann