Patents Assigned to Messrs. Stetter GmbH
  • Patent number: 4892441
    Abstract: This invention is both an apparatus and a method for distributing concrete coming from a concrete pump to anyone of a plurality of points of use. An intermediate conduit is connected with a main supply conduit and the intermediate conduit comprises a plurality of branch points connected in series by the intermediate conduit. At each branch point a short branch pipe is connected with the intermediate conduit. All branch pipes can be completely plugged by rubber plugs. A discharge conduit is connected with the end of the intermediate conduit and a draining device can be operatively connected with the discharge conduit to force a deformable plug through the intermediate conduit and at least a part of the supply conduit in order to drain and cleanse the whole system before setting of the concrete will begin. The draining process is activated at the end of a working day or working period and can be automatically started after a predetermined stop period of the concrete pump.
    Type: Grant
    Filed: March 24, 1989
    Date of Patent: January 9, 1990
    Assignee: Messrs. Stetter GmbH, Dr. Karl-Lenz-Str.
    Inventor: Rudolf Riker
  • Patent number: 4795264
    Abstract: A concreting train consists of a plurality of wagons supporting a mixer, a multiple conveyor arrangement and separate containers for cement and aggregate. A container for cement has at least one integrated conveyor worm. All container wagons are provided with inclined conveyor belts which extend below the containers and overlap one another. On separate pathes aggregate and cement are supplied into a housing of the mixer wagon. The housing is supported on a weighing frame in order to additively weigh the mixing components. The housing contains a mixing shaft operatively connected with a drive motor. The housing is mounted for reciprocating movement along an inclined angled track in order to lift the housing on a higher level for discharging the concrete into a hopper of a concrete pump.
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: January 3, 1989
    Assignee: Messrs. Stetter GmbH
    Inventor: Rudolf Riker