Patent ID: 7488168

Claim:
An apparatus for centering a reinforcing frame within a form for fabrication of a concrete pipe, and which is adapted to operably interconnect to a concrete dispensing shaft, comprising: a slotted flange operably interconnected to the dispensing shaft, said slotted flange comprising a plurality of cam bearings; a plurality of shafts with a first end and a second end, wherein said first end includes a crank arm for operable interconnection to said cam bearings of said slotted flange; a plurality of bearings operably interconnected to said shaft and interconnected to said dispensing shaft that allow said shaft to freely rotate; a plurality of centering arms interconnected to said shaft, said centering arms capable of reciprocating between a first retracted position and a second extended position, wherein in said second extended position said centering arms define a dimension substantially equal to the internal dimension of the reinforcing frame; and wherein rotation of said slotted flange displaces said crank arms thus rotating said shaft and deploying said centering arms from said first retracted position to said second extended position.