Feeding and mixing apparatus for concrete guns or the like

Claim 1

APPARATUS FOR FEEDING AND MIXING CEMENTITIOUS MATERIAL, COMPRISING: A VEHICLE HAVING MOUNTED THEREON A PRE-MIXING CHAMBER INCLUDING FIRST AND SECOND DISCRETE MIXING COMPARTMENTS ADAPTED TO RECEIVE AN AGGREGATE OF CEMENTITIOUS MATERIAL; A SECONDARY MIXING CHAMBER MOUNTED ON SAID VEHICLE IN ELEVATED RELATIONSHIP TO SAID PRE-MIXING CHAMBER; AGITATOR MEANS ROTATABLY MOUNTED IN EACH OF SAID MIXING CHAMBERS FOR MIXING THE MATERIAL CONTAINED THEREIN, SAID AGITATOR MEANS FOR SAID PRE-MIXING CHAMBER EXTENDING THROUGH SAID DISCRETE MIXING COMPARTMENTS; CONVEYOR MEANS COMMUNICATING BETWEEN SAID PRE-MIXING CHAMBER AND SAID SECONDARY MIXING CHAMBER FOR PROGRESSIVELY CONVEYING MATERIAL FROM SAID PRE-MIXING CHAMBER TO SAID SECONDARY MIXING CHAMBER, EACH OF SAID DISCRETE COMPARTMENTS HAVING A DISCHARGE OPENING COMMUNICATING WITH SAID CONVEYOR MEANS AND MEANS OPERABLE TO SELECTIVELY OPEN AND CLOSE SAID OPENINGS COMMUNICATING WITH SAID CONVEYOR MEANS, AND SAID SECONDARY MIXING CHAMBER HAVING A DISCHARGE OPENING, AND MEANS COMPRISING A CONCRETE GUN MOUNTED ON SAID VEHICLE AND COMMUNICATING WITH SAID DISCHARGE OPENING OF SAID SECONDARY MIXING CHAMBER AND LOCATED THEREUNDER, SAID CONCRETE GUN HAVING VERTICALLY ALIGNED UPPER AND LOWER COMPARTMENTS, A FIRST VALVE FOR CONTROLLING THE FLOW OF MATERIAL FROM SAID DISCHARGE OPENING OF SAID SECONDARY MIXING CHAMBER INTO SAID UPPER COMPARTMENT, MEANS FOR PRESSURIZING SAID UPPER COMPARTMENT, AND A SECOND VALVE FOR CONTROLLING THE FLOW OF MATERIAL FROM SAID UPPER COMPARTMENT INTO SAID LOWER COMPARTMENT.