Patent ID: 9138767
Filing Date: 2015-09-22
Classification: B05B

Abstract:
1. A sprinkler device comprising: a housing conduit, which has an upstream end and a downstream end, and includes an inlet at the upstream end; an inner conduit fitted in the housing conduit in an axially movable manner so that the inner conduit moves axially to an extended position, at which the inner conduit projects from the housing conduit, when a predetermined level of water pressure is applied to the inlet; a valve, disposed at an upstream end of the inner conduit and at a location that is proximal to the downstream end of the housing conduit when the inner conduit is in the extended position, including a valve body, a housing member, a chamber, and a movable valve member, the chamber being enclosed by the valve body and the housing member, and the movable valve member being disposed in the chamber; and a valve opening device located within the inner conduit downstream of the valve to operate the valve, wherein a rounded annular projection is formed on an inner surface of the inner conduit, the annular projection resisting downward axial movement of the valve body and retaining the valve body in the upstream end of the inner conduit, when the movable valve member is in an upstream position in the chamber, the valve opens and water can flow through the chamber to the inner conduit, when the movable valve member is in a downstream position in the chamber, the valve closes and water is blocked from flowing through the chamber, a force of water pressure from the inlet tends to move the movable valve member downstream in the chamber so as to close the valve in the chamber, an upstream end of the valve opening device engages the movable valve member of the valve, so that an axial force applied by the valve opening device toward the valve opposes the force of water pressure that tends to move the movable valve member downstream in the chamber and close the valve, the length of the valve opening device is predetermined in relation to the length of the inner conduit so that the valve opening device normally holds the movable valve member in the upstream position in the chamber so as to keep the valve open, the housing member includes a plurality of openings, into which water flows when the valve is open, and if the valve opening device is severed, water pressure from the inlet will force the movable valve member downstream in the chamber thereby closing the valve.