Abstract: A sprinkler with a push-in connection includes a sprinkler frame, an operating element, and a sealing cap. The sprinkler also includes one or more sealing gaskets and a retainer. Each such sealing gasket is located at least partially within a groove in the sprinkler frame. The retainer is also at least partially located within a groove in the sprinkler frame. The retainer connects to an internal bore of an outlet of a fluid supply conduit when the sprinkler is installed in the outlet. The one or more gaskets seal against the internal bore of the outlet when the sprinkler is installed in the outlet. The retainer is a spring mechanism so that the diameter of the retainer is reduced when the sprinkler is inserted into the internal bore of the outlet, and the retainer maintains pressure against the outlet internal bore.

Abstract: A flexible dry sprinkler has an inlet having an inlet orifice, an outlet, a flexible tube having a first end attached to the inlet and a second end attached to the outlet, an inlet seal for sealing the inlet orifice, whereby, when the inlet seal releases, fluid is permitted to flow from the inlet orifice to the outlet through the flexible tube, and a yoke positioned in the inlet, the yoke having a plurality of spaced-apart legs that permit the fluid to flow passed the yoke toward the outlet.

Abstract: A sprinkler guard includes at least one plate centered relative to a central axis of the sprinkler guard. A plurality of legs includes first and second legs that are attached to one plate, and third and fourth legs that are attached to another plate. A circular ring is attached to lower ends of the first to fourth legs, a center of the circular ring coinciding with the central axis, and the first to fourth legs being spaced apart about the circumference of the circular ring. First and second arms are attached to the first and second legs, respectively. In addition, a cross bar can be attached to the circular ring and extend across a diameter of the circular ring.

Abstract: A cover plate is configured to be releasably connected to a concealed fire protection sprinkler to conceal the fire protection sprinkler. The cover plate includes a first layer of metal on a first side of the cover plate that faces the concealed fire protection sprinkler, and a second layer of metal on a second side of the cover plate, the second side being opposite to the first side. The second layer of metal is more resistant to corrosion than the first layer, and is bonded to the first layer. In addition, the first layer is more thermally conductive than the second layer.

Abstract: A fire protection nozzle includes a body having two frame arms having proximal ends connected to an outlet of the body, and distal ends, the two frame arms defining a frame arm plane, and a junction formed by the distal ends of the frame arms, the junction including a central bore and an outer wall. A deflector is mounted to the body, and includes a planar member having a mounting hole in a center of the planar member to receive the outer wall of the junction, and a plurality of slots on a periphery of the planar member. The plurality of slots includes first slots, second slots, third slots, and fourth slots.

Abstract: A fire protection sprinkler system includes a horizontal barrier that covers two adjacent racks, and the vertical flue space between the racks. The horizontal barrier is provided at a predetermined height, and has a width that is at least equal to a width of the rack, and a depth that is at least equal to a sum of a depth of the rack, a depth of the other rack, and a depth of the vertical flue space. In addition, the horizontal barrier is a sheet having one or more apertures. The system also includes a rack level fire protection sprinkler connected to a fluid supply conduit, and being disposed in the vertical flue space below the horizontal barrier. The rack level sprinkler has a K-factor of 11.2 gpm/(psi)1/2 or greater, and is vertically spaced from commodities stored on the rack and the other rack covered by the horizontal barrier.

Abstract: A fire protection sprinkler system includes a horizontal barrier that covers two adjacent racks, and the vertical flue space between the racks. The horizontal barrier is provided at a predetermined height, and has a width that is at least equal to a width of the rack, and a depth that is at least equal to a sum of a depth of the rack, a depth of the other rack, and a depth of the vertical flue space. In addition, the horizontal barrier can be a sheet having one or more apertures. The system also includes a rack level fire protection sprinkler connected to a fluid supply conduit, and being disposed in the vertical flue space below the horizontal barrier. The rack level sprinkler has a K-factor of 11.2 gpm/(psi)1/2 or greater, and is vertically spaced from commodities stored on the rack and the other rack covered by the horizontal barrier.

Abstract: A dry sprinkler includes a flexible tube section that maintains a pressurized fluid, such as a liquid antifreeze solution, between a first end and a second end. A first seal prevents fluid from a supply line from entering the flexible tube section. The first seal is maintained in a sealed position by a pressure of the pressurized fluid. A sprinkler head is coupled to the second end of the flexible tube section, and includes a frame, an output orifice, a deflector, a second seal that seals the output orifice, and a thermally responsive element configured to maintain the second seal in a sealed position when the thermally responsive element is in a non-responsive state. A differential pressure controller maintains a ratio between the pressure of the pressurized fluid in the flexible tube section and a pressure of a supply fluid in the supply line to at least a certain ratio.

Abstract: A sprinkler guard includes at least one plate centered relative to a central axis of the sprinkler guard. A plurality of legs includes first and second legs that are attached to one plate, and third and fourth legs that are attached to another plate. A circular ring is attached to lower ends of the first to fourth legs, a center of the circular ring coinciding with the central axis, and the first to fourth legs being spaced apart about the circumference of the circular ring. First and second arms are attached to the first and second legs, respectively. In addition, a cross bar can be attached to the circular ring and extend across a diameter of the circular ring.

Abstract: A dry fire protection sprinkler has an inlet seal assembly to seal an inlet orifice. A spring seal compresses in response to a load. An inlet release unit releases the inlet seal assembly. A flexible tube has an inlet end connected to the inlet release unit. A flexible linkage extends through the flexible tube, and has an inlet end connected to the inlet release. An outlet biasing portion is connected to an outlet end of the tube and an outlet end of the linkage, which displaces upon activation of the sprinkler. A sprinkler body is connected to the outlet biasing portion, with an outlet seal assembly to seal its outlet orifice. When ambient reaches a predetermined temperature, the outlet seal assembly releases from the outlet orifice, and the outlet biasing portion displaces the linkage, causing the inlet of the linkage to operate the inlet release unit, releasing the inlet seal.

Abstract: A fire protection nozzle includes a body having two frame arms having proximal ends connected to an outlet of the body, and distal ends, the two frame arms defining a frame arm plane, and a junction formed by the distal ends of the frame arms, the junction including a central bore and an outer wall. A deflector is mounted to the body, and includes a planar member having a mounting hole in a center of the planar member to receive the outer wall of the junction, and a plurality of slots on a periphery of the planar member. The plurality of slots includes first slots, second slots, third slots, and fourth slots.

Abstract: A sprinkler with a push-in connection includes a sprinkler frame, an operating element, and a sealing cap. The sprinkler also includes one or more sealing gaskets and a retainer. Each such sealing gasket is located at least partially within a groove in the sprinkler frame. The retainer is also at least partially located within a groove in the sprinkler frame. The retainer connects to the internal bore of a welded outlet or a mechanical outlet when the sprinkler is installed in the outlet. The one or more gaskets seal against the internal bore of a welded outlet or a mechanical outlet when the sprinkler is installed in the outlet. The retainer is a spring mechanism so that the diameter of the retainer is reduced when the sprinkler is inserted into the internal bore of the outlet, and the retainer maintains pressure against the outlet internal bore.

Abstract: A fire protection sprinkler system includes a horizontal barrier that covers two adjacent racks, and the vertical flue space between the racks. The horizontal barrier is provided at a predetermined height, and has a width that is at least equal to a width of the rack, and a depth that is at least equal to a sum of a depth of the rack, a depth of the other rack, and a depth of the vertical flue space. In addition, the horizontal barrier is a sheet having one or more apertures. The system also includes a rack level fire protection sprinkler connected to a fluid supply conduit, and being disposed in the vertical flue space below the horizontal barrier. The rack level sprinkler has a K-factor of 11.2 gpm/(psi)1/2 or greater, and is vertically spaced from commodities stored on the rack and the other rack covered by the horizontal barrier.

Abstract: A fire protection sprinkler system includes at least two horizontal barriers, each covering two adjacent racks and a vertical flue space between the racks. The horizontal barriers are provided at a predetermined height, and have a width that is at least equal to a width of the rack, and a depth that is at least equal to a sum of a depth of the two racks and a depth of the vertical flue space. The horizontal barrier is spaced from an adjacent horizontal barrier. The system also includes at least two rack level fire protection sprinklers disposed in the vertical flue space below a horizontal barrier, of the at least two horizontal barriers. The sprinkler have a K-factor of 11.2 gpm/(psi)1/2 or greater, and are vertically spaced from commodities stored on the racks. Each horizontal barrier covers one rack level sprinkler, of the at least two rack level sprinklers.

Abstract: A cover plate is configured to be releasably connected to a concealed fire protection sprinkler to conceal the fire protection sprinkler. The cover plate includes a first layer of metal on a first side of the cover plate, the first side of the cover plate having the first layer of metal directly facing, in its entirety, the concealed fire protection sprinkler, and a second layer of metal on a second side of the cover plate, the second side being opposite to the first side. The second layer of metal is more resistant to corrosion than the first layer, and is bonded to the first layer. In addition, the first layer of metal facing the concealed fire protection sprinkler is more thermally conductive than is the second layer.

Abstract: A dry sprinkler has a casing tube having an inlet orifice and an outlet orifice. When the sprinkler is in a non-actuated state, an inlet seal assembly operatively seals the inlet orifice and an outlet seat assembly operatively seals the outlet orifice. A translating member extends through the casing tube between an inlet and an outlet. The translating member axially translates from a first position, in which the translating member retains the inlet seal assembly in a sealed state, to a second position, in which the translating member releases the inlet seal assembly, toward the outlet when the outlet seat assembly is released. The sprinkler has a nominal K-factor greater than 17 gpm/(psi)1/2. In addition, a difference between a cross-sectional area of the casing tube and a cross-sectional area bounded by an outer perimeter of the translating member is more than 30% of the cross-sectional area of the casing tube.

Abstract: A pendent fire protection sprinkler includes a sprinkler body having an inlet and an outlet that define a fluid passage and a sprinkler axis, a pair of frame arms that form a junction, a plug that seals the fluid passage, and a thermally responsive element provided between the plug and the junction, and configured to maintain the plug in the fluid passage prior to actuation of the sprinkler. A deflector, mounted to the junction, includes an annular, planar central portion extending along a plane that is perpendicular to the sprinkler axis, as well as a first angled portion, a second angled portion, a third angled portion, and a fourth angled portion, each angled portion extending outwardly from the planar central portion. In addition, each of the first to fourth angled portions is bent away from the frame arms in the outlet direction from the plane of the planar central portion.

Abstract: A dry sprinkler includes a flexible tube section that maintains a pressurized fluid, such as a liquid antifreeze solution, between a first end and a second end. A first seal prevents fluid from a supply line from entering the flexible tube section. The first seal is maintained in a sealed position by a pressure of the pressurized fluid. A sprinkler head is coupled to the second end of the flexible tube section, and includes a frame, an output orifice, a deflector, a second seal that seals the output orifice, and a thermally responsive element configured to maintain the second seal in a sealed position when the thermally responsive element is in a non-responsive state. A differential pressure controller maintains a ratio between the pressure of the pressurized fluid in the flexible tube section and a pressure of a supply fluid in the supply line to at least a certain ratio.

Abstract: A pressure maintenance device is connected to a fire protection sprinkler system having downstream piping that is exposed to freezing temperatures, and supplies a pressurized fluid to the downstream piping when the sprinkler system is in an inactivated state. When an outlet pressure sensor near an outlet of the pressure maintenance device detects that a pressure of the pressurized fluid downstream of an outlet regulator falls below a first predetermined pressure, the pressure maintenance device supplies the pressurized fluid in a primary supply mode or a secondary supply mode. The pressure maintenance device automatically switches from the primary supply mode to the secondary supply mode if a supply pressure sensor detects that a pressure of the pressurized fluid downstream of a first pressurized fluid valve, and upstream of the outlet pressure regulator, falls below a second predetermined pressure.

Abstract: A flexible dry sprinkler includes an inlet, an inlet seal assembly having a spring seal that compresses in response to a longitudinal load, and an inlet release unit. A flexible tube has an inlet end and an outlet end, and a flexible linkage extends through the flexible tube, and is connected to the inlet release unit. An outlet release unit is connected to the outlet end of the flexible tube and to an outlet end of the flexible linkage, and displaces the outlet end of the flexible linkage upon activation of the flexible dry fire protection sprinkler. A sprinkler body is connected to the outlet release unit, and has an outlet orifice sealed by an outlet seal assembly until ambient temperature reaches a predetermined temperature. When the ambient temperature reaches the predetermined temperature, translation of the flexible linkage in an outlet direction causes release of the inlet seal assembly.