Constant Pressure Rainwater Harvesting Distribution Device and System

Abstract

A rainwater harvesting device and system that stores water for irrigation and outdoor use that provides constant pressure via gravity to a sprayer such as might be used for landscape or garden irrigation, or outdoor washing. The device and system comprise a water storage vessel that is free to move vertically, and optionally contained within a rack or other structure if necessary, and supported by one or more springs, which can be compression or tension springs or a combination thereof. When the vessel is at or near capacity, the spring assembly is largely or fully compressed/extended and supports the vessel at a minimal elevation. In such a state, the pressure head provided by the static water level is sufficient to provide a desired pressure at the sprayer. During periods of lower storage, however, such as following water draw-off and lower replenishment, the spring assembly responds to the lower load by extending vertically, thus raising the vessel and thereby providing an increase in elevation head, maintaining the same desired pressure at the sprayer, regardless of the volume contained in the vessel.

1 ) A rainwater harvesting device comprising a water storage vessel having at least one outlet spigot and wherein said water storage vessel is connected to at least one spring and said water storage vessel is raised or lowered by said spring dependent upon an amount of water in said water storage vessel. 
     
     
         2 ) The rainwater harvesting device of  claim 1 , wherein said at least one spring is a compression spring. 
     
     
         3 ) The rainwater harvesting device of  claim 2  further comprising an overflow port and wherein said water storage vessel is contained within a rack. 
     
     
         4 ) The rainwater harvesting device of  claim 3  having an irrigation hose and sprayer connected to said outlet spigot. 
     
     
         5 ) The rainwater harvesting device of  claim 4  further comprising a water purifier. 
     
     
         6 ) The rainwater harvesting device of  claim 3  wherein said at least one compression spring is connected to a base. 
     
     
         7 ) The rainwater harvesting device of  claim 6 , wherein said water storage vessel is insulated sufficient to prevent freezing of water contained in said water storage vessel. 
     
     
         8 ) The rainwater harvesting device of  claim 6 , wherein a chemical suitable for fertilizing plants is added to the water contained in said water storage vessel. 
     
     
         9 ) The rainwater harvesting device of  claim 1 , wherein said at least one spring is a tension spring connected to the top portion of said storage vessel. 
     
     
         10 ) A rain water harvesting system comprising: at least one roof gutter contacted to receive water from a roof; at least one water storage vessel connected to said roof gutter; at least one compression spring connected to said water storage vessel having an outlet spigot, wherein said outlet spigot is connected to an irrigation hose and a sprayer suitable for irrigating an area with substantially constant water pressure.