초록 ▼

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 ther

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.

대표청구항 ▼

1. 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 loca

1. 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. 2. The invention in accordance with claim 1 wherein each insert is a rectangularly-shaped hollow member open at the inner and outer edges and is attached to the bars of the grid within the concrete pipe by means of at least one clip. 3. The invention is accordance with claim 1 wherein each insert is formed of a resilient strip of material with apertures therein, the strip resiliently coupled with adjacent bars of the grid, at least one hollow plug open at the inner and outer edge and inserted through an aperture of the strip and held in position by the strip so that the both open edges of the plug communicate with the interior and exterior of the concrete pipe to provide a through passageway.