A sprinkler system comprises at least one double interlock pre-action head that has a conduit having an inlet and outlet to permit flow of fire suppressant fluid through the conduit. A dedicated electrically actuatable valve is connected to the conduit to prevent fire suppressant fluid in sprinkler system piping from entering the conduit. The electrically actuatable valve opens in response to a signal from a fire detector to permit fire suppressant fluid to flow into the conduit. A heat-sensitive valve is connected to the conduit and opens to permit fire suppressant fluid to exit the conduit when ambient temperature at the heat-sensitive valve is at or above a predefined temperature. The double interlock pre-action head provides a dry pipe solution for a single room while being fully integratable into any building-wide sprinkler system, including wet pipe systems.

The invention relates to a sprinkler bulb comprising a sealed frangible housing 110, and a circuit device 120 within the housing, wherein the circuit device comprises a capacitor 150 arranged to be used as a pressure sensor. The invention also relates to a method of measuring pressure inside a sprinkler bulb using a capacitor 150 of the circuit device 120 within a housing 110 of the bulb as a pressure sensor.

The invention concerns a pipe arrangement comprising a protective device for protecting against environmental influences, the pipe arrangement comprising: a) a pipe joint which includes at least two pipe ends (1, 2) which are fixed together by means of a mechanical joint (3) and in which the pipe ends (1, 2) and also the mechanical joint are closed with a deformable hollow body (4), or b) a pipe (1) with a pipe opening (14), for example a leak, through which a medium which is disposed within the pipe can escape, wherein the pipe (1) is enclosed by a deformable hollow body where the pipe opening (14) is and wherein the pipe (1) is covered by the hollow body (4) in a predetermined portion on both sides of the opening (14), or c) a pipe having a pipe opening on which a sprinkler of a sprinkler installation is mounted, wherein the pipe (1) and also the sprinkler outlet is enclosed by a deformable hollow body (4) where the sprinkler is fixed to the pipe so that the hollow body (4) surrounds both the pipe end (1) and also the sprinkler outlet and a part of the sprinkler, or d) a pipe of a pipe system, wherein the pipe (1) is formed from two pipe portions which are connected together in positively locking relationship, for example by a welding process, a soldering process, a gluing process or the like, and wherein in the region of the positively locking connection the pipe is enclosed or covered by a deformable hollow body, or e) a pipe of a pipe system, wherein the pipe is enclosed by a deformable hollow body and where the hollow body (4) encloses the pipe (1) the pipe is carried by a suspension (13) which preferably has a material different from the material of the pipe.

A system for fighting fire, includes a timer unit with an electrical power input and out line. The timer is connected to a flow switch that response to water movement. The water movement occurs when the glass bulb shatters in a sprinkler head. The glass bulb contains a fluid which expands when exposed to heat. When the rated temperature is reached, the fluid expands sufficiently to shatter the glass bulb, allowing the sprinkler to activate and water to flow. The flow of the water tells the flow switch to turn on the timer that is set for in this example one hundred and ten seconds. The timer turns on the pump. The pump gets it water from a water tank. The pump forces the water threw the pressurize pipe system to one or more sprinkler heads. The pressure is maintain by check valves, that hold a constant 40 psi. This system is mobile. The system will need to be maintain every six month. After the system puts out a fire it will need be reset.

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.

An automatic stovetop fire suppressor providing a gradual release of a fire suppressing agent in a desired distribution pattern and method of gradual and spatial agent release are provided herein. A plastic cone shaped lid seals on the bottom of a can and forms a closed container. The closed container is filled with a fire suppressing agent. An initiator charge breaks a designed breaking point of a reduced horizontal cross sectional area when fuse activated. The bottom lid drops down exposing a radial opening. Fire suppressing agent flows out of the radial opening, suppressing a stovetop fire with minimal or no splashing of cooking oil. An initiator housing is affixed to a top wall of the can and serves as the welding point for securing the plastic lid. A travel limiting member attached to the bottom lid catches on a shoulder of the initiator housing to limit the radial opening height.

An automatic stovetop fire suppressor providing a gradual release of a fire suppressing agent in a desired distribution pattern and method of gradual and spatial agent release are provided herein. A plastic cone shaped lid seals on the bottom of a can and forms a closed container. The closed container is filled with a fire suppressing agent. An initiator charge breaks a designed breaking point of a reduced horizontal cross sectional area when fuse activated. The bottom lid drops down exposing a radial opening. Fire suppressing agent flows out of the radial opening, suppressing a stovetop fire with minimal or no splashing of cooking oil. An initiator housing is affixed to a top wall of the can and serves as the welding point for securing the plastic lid. A travel limiting member attached to the bottom lid catches on a shoulder of the initiator housing to limit the radial opening height.

Automatic fire protection sprinklers, systems and methods for vacuum dry sprinkler protection. The sprinklers include a seal assembly having a translator configured to overcome or break a vacuum force and pivot out of the fluid flow path of the sprinkler.

A fire sprinkler head (12) has a valve (42) with an X-brace latch (54), and includes a flexible conduit (14). A sprinkler nozzle (16) is secured to a first end of the flexible conduit (14). The sprinkler nozzle (16) includes a first fitting (28), a sprinkler orifice (20) and fusible element (22). A second fitting (40) is secured to the second end of the flexible conduit (14) and includes the valve (42). The valve (42) has a valve element (44) which is moveable from a latched position to an unlatched position. A flexible link (56) extends from the sprinkler nozzle (16) to the X-brace valve latch (54). Breaking of the fusible element (22) releases the flexible link (56) to move from the latched position to the unlatched position, releasing the valve (42) for flow there-through.

A fire sprinkler head (12) has a valve (42) with an X-brace latch (54), and includes a flexible conduit (14). A sprinkler nozzle (16) is secured to a first end of the flexible conduit (14). The sprinkler nozzle (16) includes a first fitting (28), a sprinkler orifice (20) and fusible element (22). A second fitting (40) is secured to the second end of the flexible conduit (14) and includes the valve (42). The valve (42) has a valve element (44) which is moveable from a latched position to an unlatched position. A flexible link (56) extends from the sprinkler nozzle (16) to the X-brace valve latch (54). Breaking of the fusible element (22) releases the flexible link (56) to move from the latched position to the unlatched position, releasing the valve (42) for flow there-through.