Patents Assigned to Deltracon Deventer B.V.
  • Method and apparatus for preparing concrete mortar
    Patent number: 4881819
    Abstract: The invention relates to a method and apparatus for preparing concrete mortar. In order to regulate the moisture content of the concrete mortar a sand sample is taken of the sand used. This sand sample is dried. The amount of water added to a concrete charge is regulated subject to the weight difference of the sand sample prior to and after drying.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: November 21, 1989
    Assignee: Deltracon Deventer B.V.
    Inventor: Frederik C. Blees