Patent ID: 8122969
Filing Date: 2012-02-28
Classification: A62C,B05B

Abstract:
1. A fire protection sprinkler for protection of at least extra hazard and high piled storage occupancies up to a maximum protection area of 196 square feet, the sprinkler comprising: a body defining an internal passageway extending along an axis between an inlet end and an opposite outlet end, the internal passageway having a K-factor between about 21 and 35, where the K-factor equals an average flow of water in gallons per minute through the internal passageway divided by a square root of pressure of water fed into the inlet end of the internal passageway in pounds per square inch gauge; at least one support arm having a first end and a second end, the first end extending from the body, the at least one arm axially extending from the first end to the second end toward the axis to an apex aligned along the axis; and a thermally-responsive closure assembly mounted in a manner to secure the outlet end of the internal passageway against the flow of water in a non-fire condition and to release in response to a predetermined temperature condition indicative of a fire to permit the flow of water from the outlet end of the internal passageway, the thermally-responsive closure assembly including a closure element and a heat-responsive trigger mounted to releasably secure the closure element at the outlet end of the internal passageway, the heat-responsive trigger having a Response Time Index (RTI) of at least 15 meter