Patent ID: 7228639

Claim:
A measuring device for obtaining inlet invert measurements, pipe invert measurements, and pipe diameter measurements, comprising: a. an invert measuring rod, comprising: i) a plurality of rod segments, each rod segment having a threaded bore at a first end and an axially extending threaded stud at a second end, the threaded bores and studs of adjacent rod segments when engaged and connecting adjacent rod segments one to another forming a continuous rod; ii) a plurality of scale portions disposed lengthwise on corresponding rod segments to define a rod scale with measurement indicators increasing from the bottom to the top of the continuous rod when the rod segments are assembled; and iii) a conical rod tip extending downwardly from the bottom of the lowermost segment of the continuous rod when assembled; b. a foot assembly, comprising: i) a guide rod removably connected to and extending perpendicularly from the bottom of the lower segment of the continuous rod, when connected having a free end opposite the connecting with the invert measuring rod; ii) a bottom conical foot connected to and extending downwardly from the free end of the guide rod and parallel to the invert measuring rod, the bottom conical foot having an axial length the same as axial length of the conical rod tip, and extending from the free end of the guide rod parallel to the invert measuring rod; and iii) a top conical foot connector to and extending upwardly from the free end of the guide rod, parallel to the invert measuring rod; and c. a diameter measuring sleeve, comprising: i) a tubular portion positionable concentrically about the invert measuring rod and having an inner diameter just greater than the outer diameter of the invert measuring rod to create a friction fit therebetween permitting sliding movement of the tubular portion along the length of the invert measuring rod to a selected position and retaining the tubular portion at the selected position on the rod; and ii) a measurement scale disposed lengthwise on the tubular portion with numerical indicators of measure increasing from the collar to the bottom of the tubular portion.