A sprinkler head for a sprinkler system including a pipe section, a sealing member provided over a pipe section discharge opening, an abutment connected, to the pipe section via a support element, and thermal release element disposed between the abutment and sealing member. A triggering means controls active thermal triggering of the thermal release element and includes an electrical circuit board having a controller, an electric power supply, and an electrical conduction path along the thermal release element. The electrical circuit board is in electrical contact with the sealing member and support element. The abutment and sealing member are electrically connected to the electrical conduction path. Current fed by the power supply through the support element, the abutment, the electric conduction path, and sealing member is produced by means of the controller, causes active heating and thus a triggering of the thermal release element.

The system includes an intake assembly upstream of a pump within the bucket which selectively uses an outer port for drawing water outside of the bucket into the system and an inner port for drawing water from within the bucket into the system. A polymer gel port is interposed between the intake assembly and the pump for combination, mixing and activation of a water and polymer gel emulsion combination within the pump. A fill assembly is provided downstream of the pump which can selectively direct water back into the bucket. A discharge assembly is also provided downstream of the pump which leads to a nozzle or other outlet for water and/or polymer gel emulsion from the system. A control valve selects between delivery of water and/or polymer gel emulsion back into the bucket through the fill assembly or out of the bucket through the discharge.

A system for forming and maintaining GPS tracked and mapped environmentally-clean chemical-based fire protection zones formed over property and ground surfaces in and about a neighborhood of homes, that proactively inhibit fire ignition and flame spread when exposed to wild fire. The system includes a GPS-tracking anti-fire (AF) liquid spraying system wirelessly connected to a wireless communication network supporting a network database. The GPS-tracked anti-fire liquid spraying system is used to spray particular GPS-specified ground surfaces in and about the neighborhood, with an environmentally-clean anti-fire chemical liquid so to form environmentally-clean chemical fire protection zones over the GPS-specified property surfaces, while generating GPS-coordinate and time/date stamped data records pertaining to the application of the environmentally-clean anti-fire chemical liquid spray during the formation of the environmentally-clean chemical fire protection zones. The GPS-coordinate and time/date stamped data records are transmitted over the wireless communication network for storage in the network database. A mobile computing system is used to access the GPS-coordinate and time/date stamped data records from the network database, relating to the formation of the GPS-specified environmentally-clean chemical fire protection zones, so as to verify that the GPS-specified environmentally-clean chemical fire protection zones were formed at the GPS-specified property surfaces on the particular date, to proactively inhibit fire ignition and flame spread when exposed to wild fire.

A neighborhood of buildings or homes, provided with a system for forming and maintaining GPS tracked and mapped environmentally-clean chemical-based fire protection zones formed over property and ground surfaces in and about the neighborhood of homes, that proactively inhibit fire ignition and flame spread when exposed to wild fire. The system includes a GPS-tracking anti-fire (AF) liquid spraying system wirelessly connected to a wireless communication network supporting a network database. The GPS-tracked anti-fire liquid spraying system is used to spray particular GPS-specified ground surfaces in and about the buildings and neighborhood, with an environmentally-clean anti-fire chemical liquid so to form environmentally-clean chemical fire protection zones over the GPS-specified property surfaces, while generating GPS-coordinate and time/date stamped data records pertaining to the application of the environmentally-clean anti-fire chemical liquid spray during the formation of the environmentally-clean chemical fire protection zones. The GPS-coordinate and time/date stamped data records are transmitted over the wireless communication network for storage in the network database. A mobile computing system is used to access the GPS-coordinate and time/date stamped data records from the network database, relating to the formation of the GPS-specified environmentally-clean chemical fire protection zones, so as to verify that the GPS-specified environmentally-clean chemical fire protection zones were formed at the GPS-specified property surfaces on the particular date, to proactively inhibit fire ignition and flame spread when exposed to wild fire.

A pulsed low-altitude and high-spray tank fire truck and a spray method thereof are provided. A liquid working medium is stored in the liquid working medium storage tank. A phase change enabler is configured to heat the liquid working medium such that the liquid working medium changes from a liquid phase into a gas phase and to pressurize the gasified working medium and send it into an energy storage gas tank. The first and second pressure-resistant water tanks work alternately. The first and second electric control water cannons are configured to spray a high-pressure liquid fire extinguishing agent to a position of a fire point at a specified height. The system control module is configured to realize automatic inflating of the first and second pressure-resistant water tanks and automatic spray operation of the first and second electric control water cannons.

A pulsed low-altitude and high-spray tank fire truck and a spray method thereof are provided. A liquid working medium is stored in the liquid working medium storage tank. A phase change enabler is configured to heat the liquid working medium such that the liquid working medium changes from a liquid phase into a gas phase and to pressurize the gasified working medium and send it into an energy storage gas tank. The first and second pressure-resistant water tanks work alternately. The first and second electric control water cannons are configured to spray a high-pressure liquid fire extinguishing agent to a position of a fire point at a specified height. The system control module is configured to realize automatic inflating of the first and second pressure-resistant water tanks and automatic spray operation of the first and second electric control water cannons.

Thermally activated devices, including thermally activated release devices. These devices may be used as part of any device or system in which thermal activation may be desired. In particular, described herein are thermally activated devices configured as sprinkler valves. The thermally activated devices typically include a channel and a plug element, where the plug element is a shape memory material, which may be a single-crystal shape memory alloy. The channel has two connected regions, where the first region has a diameter that is greater than the diameter of a plug element in a first configuration and the second region has a diameter that is less than the diameter of the plug element in the first configuration but greater than the diameter of the plug element in its second configuration.

This application provides azeotropic and near-azeotropic compositions of Z-1233zd and a second component selected from the group consisting of methyl formate, dimethoxymethane, HFC-43-10-mee and HFC-245fa. The inventive compositions are useful as aerosol propellants, refrigerants, cleaning agents, expansion agents for thermoplastic and thermoset foams, solvents, heat transfer media, gaseous dielectrics, fire extinguishing and suppression agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents. The compositions were modeled based on Vapor-Liquid Equilibria data such as those illustrated in the figures.

Battery powered electric motor-driven fire pump system for maintaining water pressure in a fire sprinkler network. The fire pump system includes: a fire pump controller including a fire pump controller logic, a battery charger and a plurality of starting contactors; a battery pack connected to the battery charger and to the plurality of starting contactors, the battery pack rechargeable by the battery charger; an electric motor powered by the battery pack through the plurality of starting contactors; and a fire pump drivable by the electric motor. In use, when the fire pump controller detects a drop in water pressure in the fire sprinkler network, the fire pump controller activates the electric motor to drive the fire pump to restore water pressure in the fire sprinkler network.

Battery powered electric motor-driven fire pump system for maintaining water pressure in a fire sprinkler network. The fire pump system includes: a fire pump controller including a fire pump controller logic, a battery charger and a plurality of starting contactors; a battery pack connected to the battery charger and to the plurality of starting contactors, the battery pack rechargeable by the battery charger; an electric motor powered by the battery pack through the plurality of starting contactors; and a fire pump drivable by the electric motor. In use, when the fire pump controller detects a drop in water pressure in the fire sprinkler network, the fire pump controller activates the electric motor to drive the fire pump to restore water pressure in the fire sprinkler network.