Patent ID: 8839877
Filing Date: 2014-09-23
Classification: A62C,B05B

Abstract:
1. An upright-type fire protection sprinkler comprising: a body defining an internal passageway extending between an inlet end and an opposite outlet end, the internal passageway having a K-factor between about 18 and about 41, 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, the outlet end having an axis; and a deflector mounted to the body by at least one support arm extending from the body and disposed in alignment with the axis and generally above and spaced from the outlet end of the internal passageway at a position with an inner surface of the deflector opposed to flow of water from the outlet end of the internal passageway, the inner surface of the deflector configured and arranged to deflect flow of water generally radially outwardly and downwardly of the sprinkler; wherein the inner surface of the deflector defines: a generally planar central area intersecting and generally perpendicular to the axis, a redirecting area including four slanted redirecting surfaces extending from a radially outer peripheral edge of the central area, each at a predetermined acute angle, relative to a horizontal plane through the central area, with a radially outer perimeter of the slanted redirecting surfaces being axially relatively closer to the outlet than the central area, and a channel disposed between each of the four slanted redirecting surfaces, and a plurality of spaced-apart tines extending from the radially outer perimeter of the slanted redirecting surfaces, towards the outlet, at predetermined tine angles, measured relative to the axis, wherein each of the four slanted redirecting surfaces is substantially planar, wherein each of the redirecting surfaces is symmetrical about a vertical plane generally through its center, with an intersection of each of the vertical planes with each of the slanted redirecting surfaces defining the predetermined acute angle, measured relative to the horizontal plane through the central area, and wherein each of the predetermined acute angle is between about 10 degrees and about 40 degrees.