Patent ID: 7681807

Claim:
An apparatus to regulate the flow of water through a sprinkler comprising: a body defining an inlet opening, an outlet flow opening and a passageway therebetween; a regulator valve being located in the passageway to regulate the flow of water between the inlet opening and the outlet flow opening, the regulator valve restricting flow depending on an amount that pressure downstream of the regulator valve exceeds a first predetermined threshold; a bypass valve being embedded at least in part with the regulator valve and being located downstream of the regulator valve to allow at least a portion of the flow to bypass the outlet flow opening through a bypass valve opening when pressure at the outlet flow opening exceeds a second predetermined threshold; the regulator valve includes a pressure responsive movable member and a regulator valve seat, the pressure responsive movable member having a bearing portion and a flow portion, and the flow of water through the passageway being about the pressure responsive movable member; the flow portion is biased to a spaced position from the regulator valve seat and configured to be forced in a direction generally against the flow of water to variable positions closer to the valve seat depending on the amount that the pressure downstream of the regulator valve exceeds the first predetermined threshold; and a first spring to bias the flow portion away from the regulator valve seat, and the first predetermined threshold depends at least on the first spring.