Patents Assigned to Waco Beton B.V.
  • Watertight seal between two concrete elements
    Patent number: 4449720
    Abstract: A watertight seal (1) between two adjoining channel-shaped concrete elements (2) has an elastic sealing strip (3) sandwiched between a socket (5) of one concrete element (2) enveloped by the socket (5). The sealing strip (3) is recessed and has a transverse profile such, that when the socket is slid over the wedge (7), material (12) of the sealing strip (3) shifts in a direction contrary to movement of the socket in order to prevent damage of the sealing strip.
    Type: Grant
    Filed: November 17, 1981
    Date of Patent: May 22, 1984
    Assignees: Ballast-Nedam Groep N.V., Waco Beton B.V.
    Inventors: Tjako A. Wolters, Aloysius G. Roggekamp