Line and valve system for fluidized particle handling

Claim 1

IN A PROCESS WHEREIN FINELY DIVIDED SOLID PARTICLES ARE CAUSED TO FLOW, FROM A SOURCE EXTERNAL TO AND AT A LOWER LEVEL THAN A FLUIDIZED BED OF FINELY DIVIDED SOLID PARTICLES, THROUGH A CONDUIT WHICH DISCHARGES INTO THE LOWER PORTION OF SAID FLUIDIZED BED OF FINELY DIVIDED SOLID PARTICLES, WHEREIN SAID FLOW THROUGH THE CONDUIT IS PERIODICALLY TERMINATED BY BLOCKING OFF SAID CONDUIT AND WHEREIN THE PRESSURE EXERTED BY THE FLUIDIZED BED OF PARTICLES AT THE DISHARGE END OF THE CONDUIT EXCEEDS THE CONDUIT PRESSURE DURING TERMINATION OF FLOW TO THE EXTENT THAT A PORTION OF SAID BED OF PARTICLES IS FORCED INTO SAID CONDUIT, THE IMPROVEMENT WHICH COMPRISES CAUSING THE FINELY DIVIDED SOLID PARTICLES TO FLOW THROUGH A CONDUIT FROM SAID EXTERNAL, LOWER LEVEL SOURCE, UPWARDLY TO A POINT