Patent ID: 6059044
Filing Date: 2000-05-09
Classification: A62C

Abstract:
A pendent-type fire protection sprinkler comprising:a sprinkler body defining an orifice and an outlet for delivering a flow of fluid from a source,said orifice defining an orifice axis, andsaid outlet being disposed generally coaxial with said orifice axis,at least one arm extending from said sprinkler body,an apex element supported by said at least one arm, with said apex axis being generally coaxial with said orifice axis, anda deflector mounted to said apex element, said deflector having a deflector body defining a first, inside surface opposed to the flow of fluid and an opposite, second surface, and having a deflector axis generally coaxial with said orifice axis,said deflector body defining at least one pair of generally opposing reentrant slots extending through said deflector body, from said first, inside surface to said second, outside surface, with slot openings at an outer peripheral edge of said deflector body, said reentrant slots extending inwardly from said peripheral edge, along reentrant slot centerlines, generally toward said deflector axis,said reentrant slots having a first width transverse to said slot centerlines in a region of said peripheral edge and a second width transverse to said slot centerlines in a region spaced inwardly, toward said deflector axis, relative to the region of said peripheral edge, said second width being greater than said first width,the innermost portions of said reentrant slots extending inwardly toward said deflector axis to be no further outward from said deflector axis than the outermost surface of said apex element.