Patent ID: 7597361
Filing Date: 2009-10-06
Classification: A01G,F16L

Abstract:
1. In combination with a tubular irrigation pipe having a first predetermined inside diameter, an outer surface, a plastic lined inner surface, and at least one outlet opening formed therein, comprising: a hollow stem fitting including a disc-shaped base portion and a stem portion extending upwardly therefrom; said stem fitting having a central opening extending therethrough; said stem portion having an outside diameter which is less than the diameter of said base portion; said disc-shaped base portion having an upper face extending around said stem portion; said stem portion having an upper end; said base portion having a diameter which is greater than the diameter of the outlet opening; said stem portion having an externally threaded portion and an internally threaded portion; a ring-shaped base ring, having lower and upper faces, removably positioned on said base portion of said stem fitting; said lower face of said base ring being complementary to said upper face of said base portion; said upper face of said base ring being complementary to the inner surface of the pipe of first predetermined diameter; said upper face of said base ring having a recessed area formed therein; a seal washer positioned in said recessed area of said base ring; said hollow stem fitting being positioned in the outlet opening so that said base portion, said base ring and said seal washer are positioned within the pipe with said stem fitting extending upwardly and outwardly through the outlet opening; a generally ring-shaped upper washer mounted on said stem portion outwardly of the pipe and having lower and upper faces; said lower face of said upper washer being complementary to the outer surface of the pipe; said upper face of said upper washer being generally flat; a nut threadably mounted on said externally threaded portion of said stem portion to sealably and physically maintain said hollow stem fitting on the pipe and so that sprinkler plumbing may be threadably received by said internally threaded portion of said stem portion; said nut and said upper washer have cooperating nut locking means thereon.