Patent ID: 6588448
Filing Date: 2003-07-08
Classification: E04G,Y10T

Abstract:
In combination:a truck comprising a wheeled frame having rearward and forward ends, and a cab mounted on the forward end of said wheeled frame; a rotatable pedestal assembly mounted on said wheeled frame rearwardly of said cab; a telescopic boom assembly, having inner and outer ends, having its inner end pivotally secured, about a horizontal axis, to said pedestal; a first hydraulic cylinder pivotally connecting said telescopic boom assembly to said pedestal for pivotally moving said telescopic boom assembly with respect to said pedestal; said telescopic boom assembly comprising an inner first boom member having inner and outer ends and first and second sides, at least one intermediate boom member, having inner and outer ends, telescopically mounted in said inner boom member which is movable between retracted and extended positions with respect to said inner boom member, and an outer boom member having inner and outer ends, telescopically mounted in said intermediate boom member, which is movable between retracted and extended positions with respect to said intermediate boom member; said outer boom member being movable with said intermediate boom member as said intermediate boom member is retracted and extended; a first concrete conduit, having inner and outer ends, positioned at said first side of said inner boom member; said inner end of said first concrete conduit being positioned at said inner end of said inner boom member; said outer end of said first concrete conduit being positioned at said outer end of said inner boom member; said inner end of said first concrete conduit being in communication with a source of concrete under pressure; an elongated, flexible concrete hose having first and second ends; said first end of said flexible concrete hose being operatively connected to said outer end of said first concrete conduit; a first elongated support, having inner and outer ends, mounted on said inner boom member at said first side thereof; a second elongated support, having inner and outer ends, mounted on said inner boom member at said second side thereof; a third elongated support, having inner and outer ends, movably mounted on said second elongated support; said third elongated support being movable between retracted and extended positions with respect to said second elongated support; said outer end of said third elongated support being operatively secured to said outer end of said intermediate boom member so that said third elongated support moves from its said retracted position to its said extended position as said intermediate boom member is moved from its said retracted position to its said extended position; a second concrete conduit, having inner and outer ends; said inner end of said second concrete conduit being in fluid communication with said second end of said flexible concrete hose; said second concrete conduit being secured to said outer end of said outer boom member for movement therewith; said second concrete conduit being positioned on said third elongated support when said outer boom member is in its said retracted position; said second concrete conduit extending from said outer end of said third elongated support when said outer boom member is in its said extended position; said flexible concrete hose being positioned on said first elongated support and at least partially upon said second elongated support when said intermediate and outer boom members are in their said retracted positions; and a concrete discharge conduit operatively secured to said outer end of said second concrete conduit.