Patent ID: 8387711
Filing Date: 2013-03-05
Classification: A62C

Abstract:
1. A dry sidewall horizontal sprinkler having an actuated and an unactuated state, the sprinkler comprising: a tube having a proximal end and a distal end, the proximal end of the tube having an inlet for connection to a liquid supply system containing a liquid, the tube defining a dry passageway extending therethrough and disposed along a longitudinal sprinkler axis, the tube providing fluid communication of the liquid between the proximal end and the distal end when the sprinkler is in the actuated state; a sprinkler body engaging the distal end of the tube, the body including a frame and a pair of frame arms extending distal of the frame, the frame defining an outlet in fluid communication with the dry passageway for discharge of the liquid when the sprinkler is in an actuated state, the pair of frame arms disposed on a bisectional plane that includes the longitudinal sprinkler axis, each of the pair of frame arms having a proximal facing impact point disposed on the bisectional plane; a deflector engaging the frame arms and distally spaced from the outlet for distribution of the liquid when the liquid is discharged from the outlet in the actuated state, the deflector including a canopy portion radially spaced from the longitudinal sprinkler axis, the deflector providing an extended coverage protection area at a density of 0.15 GPM per square foot to 0.20 GPM per square foot for an ordinary hazard occupancy; and a sealing assembly disposed within the dry passageway to control liquid flow of the liquid from the liquid supply system to the dry passageway, the sealing assembly including a spring seal disposed against a distal side of the tube inlet to seal the inlet in the unactuated state, the sealing assembly including a seat member disposed in the outlet to align a pair of distal facing impact points on opposing sides of the seat member on the bisectional plane, the seat member distal facing impact points and the frame arm proximal facing impact points disposed at the same radial distance from the longitudinal sprinkler axis, a substantial portion of a mass of the seat member being disposed to a lower side of the bisectional plane, the seat member having a proximal planar surface disposed on a plane that is normal to the longitudinal sprinkler axis and a proximal oblique surface that intersects the longitudinal sprinkler axis at an acute angle to define an oblique portion of the seat member, the oblique portion of the seat member disposed substantially to an upper side of the bisection plane and directly adjacent to the proximal planar surface.