Patent ID: 8783373

Claim:
A sidewall fire protection sprinkler, comprising: a body defining an input passage having an input and an output orifice sealed with a seal cap; and a deflector attached to the body, the deflector comprising: a central portion curved about a first, horizontal axis that is transverse to a second axis that extends in an output direction of the sprinkler; end portions extending outwardly from the central portion along the first axis, the end portions each respectively including an upper part and a lower part separated by a gap which defines an elongated notch extending between the upper part and the lower part at an innermost portion of the gap adjacent to the central portion, wherein the gap is formed extending outwardly from the central portion substantially along the first axis; and planar portions extending respectively from top edges of the upper parts of the end portions, wherein the planar portions extend in the output direction, wherein the sprinkler has a nominal K-factor in a range from about 2.8 to about 16.