Patent ID: 7771174

Claim:
A two-cylinder slurry pump for the continuous feeding of high-viscosity material, said pump comprising: first and second feed cylinders; a precharging tank; a feed line, said feed cylinders for removing high-viscosity material from said pre-charging tank and delivering the high-viscosity material to said feed line; and a changeover valve having a pivotable diverter valve for switching between said first feed cylinder and said second feed cylinder, said diverter valve having an inlet opening assigned to said feed cylinders, a discharge opening assigned to said feed line, and a side facing said cylinders and comprising: a hollow body having a cross-section that narrows from said inlet opening to said discharge opening; said hollow body being pivotably supported in the region of said discharge opening about a pivot axis and positionable for connecting at least one of said first feed cylinder and said second feed cylinder to said feed line in any position of said changeover valve; and a support arrangement and a plate cam securely connected thereto are assigned to said diverter valve on said side facing said cylinders of said diverter valve towards said cylinders, said plate cam including a first opening forming said inlet opening of said diverter valve, and said plate cam further including a second opening forming an intake opening arranged at a sufficient distance from said inlet opening to allow said cam plate to close one of said feed cylinders completely.