A fire suppression sprinkler adapted to receive arcuate surfaces of a grooved coupling is retainable to the coupling in a pre-assembled state. The coupling joins the sprinkler in facing axial end to end relation directly to grooved pipe. The sprinkler has a monolithic body which defines a bore having an inlet and an outlet. A groove, positioned between the inlet and the outlet extends around the body. A projection, positioned between the groove and the outlet also extends around the body.

A fire protection sprinkler includes a sprinkler frame and a deflector. The deflector is coupled to the sprinkler frame and distributes fluid discharged from an outlet of the sprinkler in a spray pattern centered about a sprinkler axis and defined by a fluid density in a first quadrant area 2.5 feet (ft.) below the sprinkler and perpendicular to the sprinkler axis, the first quadrant area having a first corner disposed along the sprinkler axis with a first edge extending in the direction of a fluid supply pipe, a second edge extending perpendicular to the first edge and intersecting the first edge at the sprinkler axis, the first quadrant area being defined by a grid of one square foot areas totaling an area of no more than 10 ft.×10 ft., the total fluid density being at least 15 gpm/sq. ft.

A fire protection sprinkler includes a sprinkler frame and a deflector. The deflector is coupled to the sprinkler frame and distributes fluid discharged from an outlet of the sprinkler in a spray pattern centered about a sprinkler axis and defined by a fluid density in a first quadrant area 2.5 feet (ft.) below the sprinkler and perpendicular to the sprinkler axis, the first quadrant area having a first corner disposed along the sprinkler axis with a first edge extending in the direction of a fluid supply pipe, a second edge extending perpendicular to the first edge and intersecting the first edge at the sprinkler axis, the first quadrant area being defined by a grid of one square foot areas totaling an area of no more than 10 ft.×10 ft., the total fluid density being at least 15 gpm/sq. ft.

System and methods using automatic fire protection sprinklers to provide ceiling-only fire protection of rack storage. The systems and methods provide for hydraulic and system parameters that include a hydraulic design area based upon five to no more than twelve hydraulically most remote fire protection sprinklers with a prescribed hybrid minimum design pressure.

Fire protection sprinkler assemblies and methods thereof having thermally responsive glass bulb trigger arrangements for suppression mode fast response fire protection in which the glass bulb trigger arrangements provide a consistent thermal response.

A battery pack includes at least one battery module arranged in one direction and having a cell assembly including a plurality of secondary batteries arranged in one direction; and a fire extinguishing unit having a fire extinguishing tank configured to contain a fire extinguishing agent therein, a pipe connected to the fire extinguishing tank to supply the fire extinguishing agent from the tire extinguishing tank to the at least one battery module, and a fire extinguishing valve configured so that, when an internal gas of the battery module is heated over a predetermined temperature, an inner configuration of the fire extinguishing valve is partially deformed by the heated internal gas to open an output hole thereof so as to supply the fire extinguishing agent from the fire extinguishing tank into the battery module.

A battery pack includes at least one battery module arranged in one direction and having a cell assembly including a plurality of secondary batteries arranged in one direction; and a fire extinguishing unit having a fire extinguishing tank configured to contain a fire extinguishing agent therein, a pipe connected to the fire extinguishing tank to supply the fire extinguishing agent from the tire extinguishing tank to the at least one battery module, and a fire extinguishing valve configured so that, when an internal gas of the battery module is heated over a predetermined temperature, an inner configuration of the fire extinguishing valve is partially deformed by the heated internal gas to open an output hole thereof so as to supply the fire extinguishing agent from the fire extinguishing tank into the battery module.

A bulb device 100 for a sprinkler device 200 of a fire suppression system, and a method of manufacturing a bulb device 100. The bulb device 100 includes a sprinkler bulb 101; a wireless communication device 120; and a coupling 150 affixing the wireless communication device 120 to an external surface of the sprinkler bulb 101.

A bulb device 100 for a sprinkler device 200 of a fire suppression system, and a method of manufacturing a bulb device 100. The bulb device 100 includes a sprinkler bulb 101; a wireless communication device 120; and a coupling 150 affixing the wireless communication device 120 to an external surface of the sprinkler bulb 101.

A concealable sprinkler head includes a frame having a body mountable to a fire suppression liquid source, a pair of frame arms and a pair of corresponding drop pins slidably engaged with a respective frame arm. A thermal trigger is supported within the sprinkler frame. A fluid deflector is secured to the drop pins and includes a generally horizontal surface. The drop pins extend substantially orthogonally from the horizontal surface. An inclined surface of the fluid deflector extends angularly upwardly from the horizontal surface. A concealing cup surrounds the frame arms. A cover plate is attached to the concealing cup, covering the distal end thereof, wherein the drop pins and the deflector are positioned within the concealing cup. The cover plate is removable from the concealing cup permitting the drop pins and the deflector to axially slide out of the concealing cup into an operational position.