Patent ID: 9243944
Filing Date: 2016-01-26
CPC Classification: E02D,E03B,F16L,G01F,Y10T

Claim Text:
1. A pit liner assembly comprising: a tubular upper section defining a first internal chamber; a tubular lower section defining a second internal chamber, the first internal chamber of the tubular upper section and the second internal chamber of the tubular lower section in combination defining an assembly internal chamber; a pin, the pin connected to one of the upper section and the lower section; a notch array defined in at least one of the upper section and the lower section, each pin protruding into one notch array, the array including a step, the step including a horizontal portion and a vertical portion, the lower section and the upper section sized to telescope with each other; a relief cut formed into each tubular section in which a notch array is defined; and a platform moveable within the assembly internal chamber.