초록 ▼

Ceiling, sprinklers and sprinkler systems provide extended areas of coverage through a combination of extra large and super large orifices and deflectors which extend radial distributions with acceptable uniform average and absolute distribution densities all around and beneath the sprinklers. Descr

Ceiling, sprinklers and sprinkler systems provide extended areas of coverage through a combination of extra large and super large orifices and deflectors which extend radial distributions with acceptable uniform average and absolute distribution densities all around and beneath the sprinklers. Described deflectors are circular and substantially flat, being essentially flat in pendent style and slightly fructoconical in upright style. Slots of alternating length are provided extending inwardly towards the center of the deflector from the circular perimeter to within no more than one-half inch and preferably no more than 0.6 of an inch from the center of the deflector. The upright sprinkler deflector includes central circular planar areas at least one inch and preferably at least 1.2 inch in diameter while the outer annular peripheral portion of such deflectors are coned back towards their supporting tubular bodies at an included cone angle of about one hundred forty degrees or more. Sprinkler systems of the present invention can be installed with closest adjoining pairs of sprinklers and branch lines spaced more than fifteen feet apart when the sprinklers are located within at least seven feet six inches and as close as only three feet to the protected area.

대표청구항 ▼

An extended coverage ceiling sprinkler comprising: a generally tubular body having an outlet orifice at one end, the tubular body having a K factor greater than 8.7, where the K factor equals the flow of water in gallons per minute through the tubular body divided by the square root of the pressure

An extended coverage ceiling sprinkler comprising: a generally tubular body having an outlet orifice at one end, the tubular body having a K factor greater than 8.7, where the K factor equals the flow of water in gallons per minute through the tubular body divided by the square root of the pressure of the water fed into the tubular body in pounds per square inch; a plug at least generally closing the outlet orifice; a triggering element releasably retaining the plug closing the outlet orifice; and deflecting means spaced from and generally aligned with the outlet orifice so as to be impacted by a flow of water issuing in a column from the outlet orifice after release of the plug, the deflecting means being configured and positioned for deflecting the water flow generally radially outwardly all around the water column such that when said ceiling sprinkler is arranged with three other sprinklers identical to said ceiling sprinkler to define an at least rectangular array having an area of at least 144 sq. ft., with a separate one of the four identical sprinklers located at each of the four corners of the rectangle and the deflecting means of each identical sprinkler positioned at least within two feet of a generally smooth ceiling parallel to and at least coextensive in area with the sprinkler defined rectangle, and water is supplied simultaneously to each of the four identical sprinklers at a pressure sufficient to flow through each sprinkler at a discharge rate equal to the area of the sprinkler rectangle in square feet times a selected discharge density of at least 0.15 gallons per minute/GPM/ft2, the supplied water is projected by the four identical sprinklers at least onto a square area centered with respect to the sprinklers no more than three feet beneath the sprinkler deflecting means, the centered square area being at least six feet shorter on a side than a shortest side of the sprinkler rectangle, and the centered square area receives water from the four identical sprinklers at an average density in GPM/ft2 at least equal to the selected discharge density in GPM/ft2 and each square foot of the centered square area receives at least 0.02 GPM.