Patent ID: 8439657

Claim:
A concrete or sludge pump comprising: a stationary assembly and a rotating assembly; the stationary assembly comprising: an access gate which is attached to a rotating pressure plate housing by two hinges and two safety latches, the access gate having two large holes disposed on opposite sides of a gate center; when in the closed position, the access gate retains a stationary pressure plate; a stationary wear plate is bolted to the stationary pressure plate; one of the large holes of the access gate is connected to an outlet of the pump, the other of the large holes of the access gate is connected to an inlet of the pump; the pump inlet is connected to a ninety degree upward pipe bend, the other end of the pipe bend connected to a bottom end of upward facing hopper via a flexible leveling joint; the bottom end of the hopper, the end of the other end of the pipe bend, the ninety degree upward pipe bend and pump cylinders all having the same inner diameter; a neoprene rubber pipe is located between the pump outlet and the stationary pressure plate and a further neoprene pipe is located between the 90 ninety degree pipe bend and the stationary pressure plate; the neoprene rubber pipe having an inner diameter that is the same inner diameter as the pump cylinders; the rotating assembly comprising: a rotating pressure plate housing, a rotating pressure plate; the rotating pressure plate bolted on one side to a rotating wear plate; the other side of the rotating pressure plate bolted to two pump cylinders and a chain sprocket; the pump cylinders are bolted to the rotating pressure plate at one end and the other end of the pump cylinders are bolted to an exchange box; the pump cylinders on one side of the exchange box and the other side of exchange box is bolted to hydraulic rams; each of the two pumping cylinders containing a piston; a piston position electronic detection system is provided for detecting the position of the pistons as they reach their destination; the hydraulic rams bolted to a hydraulic live swivel joint; the hydraulic live swivel joint providing hydraulic pressure from an electrically controlled stationary hydraulic valve to the hydraulic rams to drive the pistons in the pump cylinders; the rotating assembly supported by three ball bearings; a bi-directional hydraulic motor is bolted to the rotating pressure plate housing; the motor is positioned so that a sprocket on a motor shaft is in line with the sprocket bolted to the rotating pressure plate; a chain links the two sprockets and the motor is able to rotate the rotating assembly 180 degrees per cycle, or continuous about a common axis in both forward or reverse directions.