Patent ID: 8123504
Filing Date: 2012-02-28
Classification: F04B,Y10S,Y10T

Abstract:
1. A multi cylinder thick materials pump for providing concrete comprising: at least two stationary feeding cylinders for feeding a thick material from a pre filling container into a feed line; and a shift valve associated with the feed line for alternatively connecting the feeding cylinders with the feed line, the shift valve comprising: at least two moveable valve bodies, each of the valve bodies including a straight transfer section between a respective one of the feeding cylinders and the feed line, the shift valve being connected downstream of the feeding cylinders to a collector tube; and each of the moveable valve bodies comprising a rotationally movable rotating slide having an axis of rotation that is offset from the axis of its respective feeding cylinder, each of the rotating slides including at least three sections disposed about the axis of rotation of the rotating slide that are selectively rotated into alignment with its respective feeding cylinder comprising the straight transfer sections formed as an aperture passing through the rotating slide for connecting the respective one of the feeding cylinders with the feed line, a blocking section for blocking the connection between the respective feeding cylinder and the feed line, and an inlet section which when rotated into alignment with its respective feeding cylinder is simultaneously aligned with the pre filling container; wherein the rotation of each rotating slide and the operation of each feeding cylinder is coordinated to provide a substantially continuous flow of concrete through the feed line.