Concrete forming tube
OwnerJames M. Bradacinventor
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Abstract
A large diameter single-piece thermoplastic concrete forming tube with axially spaced and integrally formed fully encircling circumferentially continuous radially rigidifying ribs, and method of forming a concrete column employing the tube.
Claims13
A single-piece concrete form tube, comprising an inflexible thermoplastic tube at least 16 inches in diameter and at least 4 feet long in the axial direction, the tube open at both axial ends and having a plurality of integrally formed fully encircling circumferentially continuous radially rigidifying ribs axially spaced between 10 and 36 inches apart center-to-center along the full axial length of the tube whereby any 3 foot length of the tube includes at least one radially rigidifying rib.
Dependencies are inferred from the claim text.