Patent ID: 8387712
Filing Date: 2013-03-05
Classification: A62C

Abstract:
1. A fire sprinkler with a built-in cutoff valve, comprising: a sprinkler housing comprising an externally threaded round sprinkler nozzle disposed along a central axis and allowing fire retardant to flow into said housing, said sprinkler nozzle having a distal end for connecting to a supply pipe and a proximal end overlapping a ball valve capable of being manually set to allow or disallow the flow of retardant, such ball valve comprised of a rotatable ball set between an upper ball seal and a lower ball seal and connected to a closure stem, such upper ball seal disposed within the proximal end of the sprinkler nozzle and such lower ball seal disposed within the upper annulus of a lower body unit comprised of such upper annulus attached to a pair of support arms, wherein each support arm extends from the upper annulus and terminates at a lower annulus that is disposed along the central axis, such lower body unit further comprising an activation plug disposed within each of the upper annulus, lower ball seal and the ball itself, said activation plug braced against the proximal end of a heat-sensitive rod disposed along the central axis between said support arms, the distal end of such heat-sensitive rod seated in the proximal end of a bracing point, the distal end of such bracing point attached to the center of a circular deflector shield, and said support annulus attached to the center of said deflector shield.