Patents by Inventor Jens Peter Nielsen

Jens Peter Nielsen 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).

  • Machine for making concrete pipes in upright position
    Patent number: 4067679
    Abstract: In a concrete pipe moulding machine comprising a rotationally vibrated core and an outer mould, deficiencies may occur especially in the upper ends of the moulded pipes due to rather vigorous relative movements between the core and the outer mould. Means are provided to moderately reduce these relative movements by neutralizing the tendency of the outer mould to perform a rocking motion caused by the transmission of the rotating vibration forces via the moulding material onto the outer mould.
    Type: Grant
    Filed: September 21, 1976
    Date of Patent: January 10, 1978
    Assignee: Pedershaab Maskinfabrik A/S
    Inventor: Jens Peter Nielsen