Patent ID: 9573007
Date: 2017-02-21
CPC Classifications: A62C

Claim:
1. A fire protection sprinkler in a dry-pipe sprinkler system comprising: a frame body defining an internal passageway extending along a sprinkler axis between an inlet end and an opposite outlet end to define a passageway length, the internal passageway having a nominal K-factor of at least 25, 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, the first end extending from the frame body; and a deflector centered and axially aligned with the sprinkler axis, the deflector being supported by the second end of the pair of support arms so as to be spaced from the outlet end of the internal passageway, the pair of support arms extending from the first end to the second end toward the axis so as to form an apex aligned along the axis; and means for allowing the flow of water to flow from the outlet end of the internal passageway to be distributed by the deflector to address a fire in a rack storage arrangement of at least one of Class I-IV and Cartoned Unexpanded Group A Plastics commodity as defined by NFPA 13 (2013 Edition) stored at least at a nominal 40-ft storage height when the sprinkler is disposed in a grid of sprinklers in a dry-pipe piping system and installed proximate a nominal 45 ft. high ceiling or higher, the means including: