Patent ID: 6286765
Filing Date: 2001-09-11
Classification: A01G,Y02A,Y10S,Y10T

Abstract:
An irrigation system for the uniform distribution of a spray of water by continuously cycling a spray head on and off during a watering period, said system comprising:at least one spray head connected to receive water from a water supply;at least one supply valve connected to control the flow of water from the water supply to the spray head, the supply valve operating alternatively in an open position to allow water to flow to the spray head and a closed position in which water from the water supply is blocked from flowing to the spray head; anda control circuit coupled to the supply valve for activating the supply valve continuously between a closed position and an open position to produce a plurality of flow cycles at the spray head during a watering period of time, wherein each flow cycle comprises:an opening transition flow period occurring in response to the supply valve switching from the closed position to the open position;a full flow period immediately following the opening transition flow period during which full flow period the supply valve is in the open position;a closing transition flow period immediately following the full flow period in response to the supply valve switching from the open position to closed position; anda low flow period immediately following the closing transition flow period, the supply valve being in the closed position during the low flow period, the opening transition flow period combined with the closing transition flow period amounting to a total transition period on the order of the full flow period.