Slurry metering pump

Claim 1

A VOLUMETRIC METERING PUMP WHICH COMPRISES IN COMBINATION: AN ELONGATED HOUSING MEMBER HAVING AN OPENING AT THE ONE END AND THE OTHER END AND CHARACTERIZED BY A PLURALITY OF CONTOURED INTERIOR RESTRICTIONS DEFINING INLET, DELIVERY, AND OUTLET CHAMBERS AT THE ONE END, BETWEEN THE TWO ENDS, AND AT THE OTHER END RESPECTIVELY; AN ELONGATED REINFORCED TUBULAR HOSE ELEMENT DISPOSED WITHIN AND THROUGHOUT THE LENGTH OF THE HOUSING MEMBER; SUPPORT MEMBERS WITHIN THE HOSE ELEMENT AND AT THE RESTRICTIONS TO PROVIDE FLUID-TIGHT CHAMBERS BETWEEN THE EXTERNAL WALLS OF THE HOSE ELEMENT AND THE INTERNAL WALLS OF EACH CHAMBER AND TO PREVENT THE COLLAPSE OF THE HOSE ELEMENT AT EACH RESTRICTION; MEANS TO INTRODUCE A PRESSURIZED FLUID INTO THE INLET CHAMBER BETWEEN THE EXTERNAL WALL OF THE HOSE ELEMENT AND THE INTERNAL WALL OF THE CHAMBER; MEANS TO INTRODUCE AN PRESSURIZED FLUID INTO THE OUTLET CHAMBER BETWEEN THE EXTERNAL WALL OF THE HOSE ELEMENT AND THE INTERNAL WALL OF THE OUTLET CHAMBER; MEANS TO INTRODUCE A PRESSURIZED FLUID INTO THE ONE END OF THE DELIVERY CHAMBER BETWEEN THE EXTERNAL WALL OF THE HOSE ELEMENT AND THE INTERNAL WALL OF THE DELIVERY CHAMBER; A PAIR OF ELONGATED FLAT PLATE MEMBERS WITHIN THE DELIVERY CHAMBER AND OPPOSINGLY MOUNTED ON EITHER SIDE OF THE HOSE ELEMENT; AND MEANS TO ADJUST THE INWARD AND OUTWARD MOVEMENT OF THE PLATE MEMBERS SUBSTANTIALLY PERPENDICULAR TO THE FLOW OF MATERIAL THROUGH THE HOSE ELEMENT, THEREBY PROVIDING FOR ADJUSTMENT OF THE VOLUME OF MATERIAL DISPENSED FROM THE PUMP IN EACH CYCLE.