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US 4,378,032 AGranted
Slotted concrete pipe
OwnerVincent A. Saggeseinventor
Life of this patent
Estimating the term…
Abstract
Concrete pipe including a hollow tube of concrete with a grid of reinforcing bars embedded therein. A plurality of inserts are embedded in the concrete pipe in between the bars of the grid and have passageways therethrough to form slots between the interior of the concrete pipe and the exterior thereof at predetermined locations to form slotted concrete pipe.
Claims3
A concrete pipe comprising;
- a hollow tube of concrete formed with a grid of reinforcing bars embedded therein, a plurality of inserts embedded in the concrete pipe and having through passageways to form slots between the interior of the concrete pipe and the exterior thereof at predetermined locations to form slotted concrete pipe, and each insert is located in between the bars of the grid and is attached to adjacent bars of the grid within the concrete pipe.
Dependencies are inferred from the claim text.