Patent ID: 8657020
Filing Date: 2014-02-25
Classification: A62C,B05B

Abstract:
1. A fire protection sprinkler for use in protection of at least extra hazard and high piled storage occupancies up to a maximum protection area at least 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; a pair of support arms each having a first end and a second end and extending from the body, the arms extending from the first end to the second end toward the axis to an apex aligned along the axis; and a deflector having an outer perimeter centered about the axis, the deflector being supported by the pair of arms and spaced from the outlet end of the internal passageway with the arms defining a plane bisecting the deflector, the deflector including a plurality of tines and a plurality of openings along the deflector perimeter, each opening having an innermost portion and a pair of sidewalls extending from the innermost portion to the perimeter, the plurality of openings including openings of a first type having sidewalls uniformly disposed about the axis, the plurality of openings including openings of a second type having a first point disposed on one of the pair of sidewalls and a second point disposed on the other of the pair of sidewalls, the first point and the second point being located along the sidewalls at equal distances from the perimeter of the deflector and at different radial distances from the axis, the openings of the first type being disposed at eight locations about the deflector perimeter and one opening of the second type being disposed about the deflector perimeter between each of the locations of the first type of openings to provide a non-circular spray pattern having at least one of: 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