04697952 is referenced by 7 patents and cites 5 patents.

Underground irrigation apparatus (10) having a ground penetrating part (12) arranged for forming a hole (14) in ground (16) to be irrigated, and a separate distribution part (18) arranged for insertion into the hole (14) formed by the ground penetrating part (12) and dispensing a fluid into ground to be irrigated. Preferably, the ground penetrating part (12) is inserted into a socket (22) formed in the distribution part (18) when the latter is lowered into the hole (14) previously formed by the ground penetrating part (12) in order to prevent clogging of discharge ports of the distribution part (18) during the installation process.

Title
Underground irrigation apparatus and method for using same
Application Number
6/834544
Publication Number
4697952
Application Date
February 28, 1986
Publication Date
October 6, 1987
Inventor
Mitchell E Maddock
541 West Coolidge Ave., Coolidge, 85228
AZ, US
Agent
Richard R Mybeck
IPC
E02B 13/00
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