Abstract: A temperature pressure relief device includes a body including an inlet passage into which high-pressure gas is introduced, an interior passage extending from the inlet passage in a predetermined first direction, and a high-pressure gas exhaust passage that is formed between the inlet passage and a reference end that is a distal end of the interior passage in the first direction and that connects the interior passage to an outside, a blocking part disposed in the interior passage of the body and selectively placed in one of a blocking state or a connecting state, and a support part arranged between the blocking part and the reference end, in which the support part is maintained in a solid state at a reference temperature or less and is in a molten state at more than the reference temperature and discharged from the interior passage.

Abstract: Methods and systems are provided for a cooling system valve comprising a fusible insert and a heating element coupled to the insert. In one example, in response to an increase in coolant temperature to above a first threshold temperature, a movable element of the cooling system valve may be actuated to a fully open position and in response to an increase in coolant temperature to above a second threshold temperature with the movable element in a fully open position, electric current may be routed through the heating element to heat and melt the fusible insert. By melting the fusible portion, coolant may flow through an opening created in the movable element.

Abstract: Disclosed herein is an invention related to a safety valve and gas cylinder having the same. The disclosed safety valve includes a valve part configured to discharge gas filled in a main body, and a blocking part disposed in the valve part and configured to block a gas flow path in accordance with a temperature and pressure inside the main body.

Abstract: A safety arrangement for a DME fuel tank of a vehicle, adapted to release an excessive pressure from the fuel tank, including a spring-loaded pressure release valve adapted to open at a predefined pressure level, where the safety arrangement further includes a housing mounted on the fuel tank and having an outer opening closed by a lid, where the pressure release valve is arranged in the housing and where the housing is provided with an outlet pipe having an outlet opening, and where the lid is adapted to melt at a predefined temperature, thereby allowing gas to exit the pressure release valve through the outer opening of the housing when the pressure release valve is open and the lid has melted. A small gas leakage caused by an excessive pressure can be discharged downwards through the outlet pipe and outlet opening towards the ground, and a large gas leakage, caused by e.g. a fire, can be discharged outwards from the fuel tank, away from the fire.

Abstract: A torque converter check valve has a valve element movable between a closed position and an open position by applying hydraulic pressure to a portion of the valve element and by applying a resilient force by a resilient element acting on another portion of the valve element. A spacer element is provided to act on the valve element and limit movement of the valve element in the direction in which the resilient element is compressed to reduce wear on the resilient element during operation of the torque converter check valve.

Abstract: A thermal safety device includes a device body with an inlet duct and at least one outlet hole in communication with the atmosphere, a shut-off device mounted in the device body and movable between a closed position and an open position, and a retaining element that keeps the shut-off device in the closed position. The retaining element includes a casing containing a heat sensitive substance configured to expand upon reaching a first predetermined temperature and break the casing and allow the valve to open. A yielding support element provides support for and protects the casing until the temperature reached by the support element is higher than a second predetermined temperature which is higher than the first. The support element is configured to yield upon reaching the second predetermined temperature to place the shut-off device in the open position.

Abstract: Various embodiments of exhaust valves are described. In an example, an exhaust valve assembly includes a valve body having a cylinder, a piston disposed within the cylinder, and a sealing material disposed within a trough at the bottom of the cylinder. The selection of the sealing material may be based on an operational temperature that is above a melting point of the sealing material.

Abstract: A temperature activated valve is provided comprising a trigger for effecting actuation of the valve. The trigger includes a temperature responsive trigger portion including a plurality of constituent trigger segments connected to one another in series. The constituent trigger segments include a plurality of temperature responsive trigger segments. Each one of the temperature responsive trigger segments, independently, includes a composite material, the composite material including: (a) a shape changing material-comprising component configured to assume a change in shape in response to receiving of heat energy by the temperature responsive trigger segment, and (b) a relatively inelastic material-comprising component having a modulus of elasticity that is greater than the modulus of elasticity of the shape changing material-comprising component.

Abstract: A diaphragm valve having at least two axially extending fluid passageways, which are aligned with each other and which extend towards each other, and a separation wall between the fluid passageways provides for the separation wall, if viewed in the longitudinal sectional view, to have a flatter and a steeper section for delimiting the fluid passageways. Moreover, a method for producing a diaphragm valve housing is provided.

Abstract: The invention provides an electrically operated valve which can control a flow rate precisely at a small flow rate distributing time and can circulate a fluid so as to prevent a pressure loss as much as possible at a large flow rate distributing time without an increase of a working and assembling cost. A movable valve seat body forming a main valve port for forming a small flow rate flow path extending from a first inlet and outlet to a second inlet and outlet is arranged between a valve chamber and a lower chamber. The movable valve seat body is structured such that its lower portion is slidably fitted and inserted to the lower chamber, and such as to serve as a float type check valve body for opening and blocking a large flow rate flow path extending from the second inlet and outlet to the first inlet and outlet.

Abstract: A temperature activated valve is provided comprising a trigger for effecting actuation of the valve. The trigger includes a temperature responsive trigger portion including a plurality of constituent trigger segments connected to one another in series. The constituent trigger segments include a plurality of temperature responsive trigger segments. Each one of the temperature responsive trigger segments, independently, includes a composite material, the composite material including: (a) a shape changing material-comprising component configured to assume a change in shape in response to receiving of heat energy by the temperature responsive trigger segment, and (b) a relatively inelastic material-comprising component having a modulus of elasticity that is greater than the modulus of elasticity of the shape changing material-comprising component.

Abstract: A method for operating a reducing agent delivery device having a liquid reducing agent tank, an injector dispensing reducing agent into an exhaust treatment device, an internal combustion engine and a reducing agent line from tank to injector, includes conveying the reducing agent from tank to injector with a pump and providing a pressure sensor in the line. The method includes, repeatedly: determining and providing supply pressure for the injector in the delivery device with the pump, calculating an injector opening time from a determined injection volume and supply pressure and opening the injector at the calculated injector opening time. A venting procedure at a point in time includes: determining an increase of a pressure conveying volume characteristic in the delivery device, calculating an air bubble volume by comparing the increase to a target increase, and conveying a conveying volume through the injector. A motor vehicle is also provided.

Abstract: A method and apparatus to periodically inspect and control piston movability are provided that can include using a contactless sensor system through a gas outlet port of a pressure relief device. By moving a stop, relative movement of the piston can be compared to the fixed body reflecting a movability or a blocking of the release piston. Inductive/magnetic or optical borescope sensors can detect piston movement through the gas outlet, for example. The activation function where the piston must move when activated can therefore be tested and maintained.

Abstract: A tank system includes a high-pressure tank, a detection unit for detecting a temperature increase in at least a portion of the high-pressure tank, a decompression unit for decompressing the high-pressure tank, and a control unit for controlling the decompression unit to decompress the high-pressure tank when a temperature increase in at least a part of the high-pressure tank is detected by the detection unit.

Abstract: A tank system includes a high-pressure tank, a detection unit for detecting a temperature increase in at least a portion of the high-pressure tank, a decompression unit for decompressing the high-pressure tank, and a control unit for controlling the decompression unit to decompress the high-pressure tank when a temperature increase in at least a part of the high-pressure tank is detected by the detection unit.

Abstract: An improved thermal relief vent for a fuel tank, and a method of manufacturing the same, includes a thermal relief ring that is used to create a mechanical seal within the vent. The thermal relief ring, at room temperature, is crimped in place by use of the vent cap itself. The crimped thermal relief ring creates a mechanical seal between the vent and the vent cap, up until a predetermined thermal relief point, at which time the thermal relief ring will soften and/or yield and release the vent cap from the vent body.

Abstract: This invention relates to a heat activated shut-off device for gas and liquid flows in fuel supply lines and consists of a housing with a longitudinal void therethrough for fluid passage. A valve seat within the longitudinal void and a spring biased piston slidably carried within the housing when in bearing engagement, will shut-off the flow of fluid. A eutectic metal fuse which is temperature sensitive and fails at a pre-determined temperature extends in part externally of the external surface of the housing and couples with a flow indicator carried adjacent the housing external surface. Coupling of the eutectic metal fuse and flow indicator exposes the eutectic metal fuse at least in part to ambient air. The flow indicator is rotatable upon displacement of the piston. Failure of the eutectic metal fuse results in the uncoupling of the flow indicator that permits the spring to displace the piston into the valve and consequently rotate the flow indicator to another position thereby evidencing shut-off.

Abstract: A gas safety valve includes a main body having a first passageway, a second passageway, a third passageway, and a fourth passageway that have various inner diameters. Two ends of the second passageway are respectively in communication with the first passageway and the third passageway. The third passageway is in communication with the fourth passageway. A spring is mounted in the second passageway and longer than the second passageway. A ball is mounted in the third passageway and has a diameter larger than an inner diameter of the second passageway. A sealing ring and a restraining member are fixed in the fourth passageway. When gas flows from backward to the gas safety valve, the ball is pushed backward against the sealing ring and thus blocks a passageway of the sealing ring, preventing outflow of the gas.

Abstract: A gas safety valve includes a main body having a longitudinal through-hole consisting of a first section, a second section, and a third section with different inner diameters. A ball and a restraining member are mounted in the first section. A spring is mounted in the second section, with an end of the spring protruding out of the second section for biasing the ball away from the second section. An outer sleeve is force-fitted in the third section of the main body. A hollow adjusting block is mounted in the outer sleeve and has an outer threading for threadedly engaging with an inner threading of the outer sleeve. The other end of the spring abuts against the adjusting block. Adjustment of a position of the hollow adjusting block in the outer sleeve changes a distance between the ball and the second section.

Abstract: An improved thermal relief vent for a fuel tank, and a method of manufacturing the same, includes a thermal relief ring that is used to create a mechanical seal within the vent. The thermal relief ring, at room temperature, is crimped in place by use of the vent cap itself. The crimped thermal relief ring creates a mechanical seal between the vent and the vent cap, up until a predetermined thermal relief point, at which time the thermal relief ring will soften and/or yield and release the vent cap from the vent body.

Abstract: The present invention is to provide a thermally-sensitive safety device for gas tubing including a main body provided with an inlet, an outlet and a gas passage communicated with said inlet and said outlet, and a thermally-sensitive control valve mounted in the gas passage. The control valve has a ball, which is normally biased by a spring to stop against a thermally-sensitive member, and a bushing with through hole in alignment with the ball. The thermally-sensitive member melts while ambient temperature is higher than the melting point thereof, whereby said ball is biased by said spring to contact against and seal the through hole of the bushing such that the gas passage is blocked off.

Abstract: A coupling for connecting a cylinder valve on an LPG tank to the inlet of a pressure regulator for gas consuming equipment comprises a nipple having an upstream end for connection with the cylinder valve and a downstream end for connection with the pressure regulator, and a plastic coupling nut for connecting the nipple to the cylinder valve. The end wall of the coupling nut has a metal heat transfer washer on the inner side thereof, and a pressure responsive flexible shutoff valve plate is provided in the nipple passageway. The shutoff valve plate closes the passageway in response to a pressure differential thereacross of no more than 15 psi, and the end wall of the coupling nut and the heat transfer washer are responsive to a temperature of between 240° F. and 300° F. to release the nipple for displacement away from the cylinder valve in the direction downstream of the nipple.

Abstract: A combination thermal and pressure relief valve is disclosed that includes a first housing having an opening at a first end and a pathway extending towards the opening from a second end of the first housing. A second housing is partially received in the opening of the first housing, and the first and the second housings define a chamber adjacent the pathway. An exitway extends from the chamber to an exterior of the valve. A bearing element is within the chamber adjacent the pathway and is larger than a width of the pathway. A spring is within the chamber, is under compression, and in line with the bearing element. A thermal element is also within the chamber and in line with the spring. The thermal element melts at a predetermined temperature. The spring exerts a force on the bearing element such that the bearing element is biased against the pathway and forms a seal between the chamber and the pathway.

Abstract: A bypass valve assembly, comprising: (a) a housing 12 having an inlet 16 and an outlet 18; (b) a valve member 20 disposed within the housing and being movable between a closed position and an open position; and (c) a slug of material 30 disposed in an initial substantially solid phase in contact with the valve member 20 so as to maintain the valve member in the closed position. The slug of material 30 is subsequently heatable into a substantially softened phase so as to permit the valve member 20 to move into the open position.

Abstract: A fluid pressure and heat sensitive valve connected with a flow line includes a collapsible pin, normally maintaining the valve closed, which collapses to open the valve in response to fluid pressure above a predetermined limit and includes a fusible plug which melts in the event of a fire, releasing the pin to allow fluid pressure to open the valve.

Abstract: A fluid pressure and heat sensitive flow control valve interposed in a flow line includes a collapsible pin, normally maintaining the valve open, which collapses to close the valve in response to fluid pressure above a predetermined limit and includes a fusible plug which melts in event of a fire, releasing the pin to allow fluid pressure to close the valve.

Abstract: A fail-safe HVAC damper apparatus comprises a duct channel with a closure comprising one or more quadri-panel hinged elements, each with four panels connected by four parallel hinge pins. A gear shaft with a toothed gear is controllably rotated to linearly drive a spring-biased plate to move one of the hinge pins of each quadri-panel element between an open and a closed position. A drive motor may be activated to open or close the closure, e.g. by a smoke detector or other controller. A meltable fuse in the duct channel may be connected to a disconnect which uncouples the gear shaft and toothed gear, and a spring moves the closure to a default closed or open position.

Abstract: A relief device which activates in response either to excess temperatures or pressures in or around a pressurized vessel and which resists extrusion related failures even at high pressures is provided. The relief device includes a body having an inlet, an outlet, and a fluid flow passage communicating with the inlet and outlet. The body further includes a fluid escape passage having a member therein which is porous to gases and liquids but not to solids and a plug of a fusible material which melts at a predetermined temperature positioned adjacent to the porous member. A first piston is positioned in the fluid flow passage and is normally biased into a sealing relationship with the inlet. A second piston is positioned in the fluid escape passage and is normally biased against and applies a compressive force on the plug of fusible material.

Abstract: The valve in automatic shutoff valve mechanism is held in a predetermined elevated open position by a magnet spaced above the valve, and the valve can be released for downward movement into shutoff position either by melting of a fusible nut holding a threaded magnet-supporting stem or by the mechanism being vibrated sufficiently severely to shake the valve loose from the attraction of the magnet.

Abstract: A thermally responsive pressure relief system is provided for a receptacle such as a pressure vessel. A passage communicates the interior of the vessel with the exterior thereof. A closure member is positioned in the passage. A fusible bonding material of a selected melting point fixes the closure member in the passage. The closure member includes an integral rupturable section that ruptures at a selected pressure differential between the interior and the exterior of the vessel.

Abstract: A valve plug is biased inwardly by a spring (90) to close an opening (10) in a cap (2) for a fuel tank filling and venting tube. A valve stem includes a first portion (62) which is engaged by the spring (90) and a second float cage portion (40) that is secured to and extends axially inwardly from the plug. A collapsible retainer (70) is secured to the cage (40) and has an abutment surface (74) which engages an abutment surface (68) on the first portion (62) to hold the cage (40) and the first portion (62) in position relative to each other and to transmit axial forces therebetween. A fusible material ring (88) is positioned radially between the retainer (70) and the cage (40) to prevent the retainer (70) from collapsing. At elevated temperatures, the ring (88) melts to allow the retainer (70) to collapse, the cage (40) and first stem portion (62) to separate from each other, and the valve plug and cage (40) to move away from the opening (10).

Abstract: There is provided a novel dual functioning, dual metal safety release valve for a pressure cooker. This valve comprises a metallic retainer member having a bore therein in which is held a fusible metal alloy. The metallic retainer is held in a suspended manner loosely in an opening in the lid of the pressure cooker contrary to the conventional manner in which the said release valve is sealingly fitted to the pressure cooker. The safety release valve is held at a specific angle and is so fabricated that when the pressure cooker is in operation, the safety release valve remains in suspended condition in the opening of the lid of the cooker, thereby letting air to escape first and when substantially all the air has escaped, the developing steam pressure forces the safety release valve upwards and a sealing of the opening in the lid of the cooker is achieved.

Abstract: Apparatus which can be installed over an opening on a container and can provide relief of excessive pressure conditions and excessive vacuum conditions in the container and provide rapid temperature actuated pressure relief for the container in the event of fire or other potentially dangerous heat related conditions, the apparatus including an aperture therethrough communicating with the container opening and a member releasable maintained in the aperture with a substance which melts at a predetermined temperature to enable pressure in the container acting against the releasable member to separate and even blow the releasable member from the apparatus and escape from the container through the aperture, the preferred construction including a self-actuating and self-modulating combined pressure and vacuum relief valve assembly which provides accurate pressure relief for the container at a predetermined over pressure condition and high inflow rates of air for vacuum relief at a predetermined excessive vacuum or

Abstract: A pressure relief valve, which can be pressure activated or thermally activated, includes a valve housing with an inlet communicating with an interior of a pressure vessel, and a passage from the inlet, through the housing, to an outlet for communicating with the exterior of the housing. A seal plug has a passageway which communicates between an inlet side of the passage and an outlet side of the passage. The seal plug is disposed within a cavity of the housing and across the passage. The seal plug retains a frangible disk against a radial shoulder of the passage for sealing the passage. Excessive pressures within the pressure vessel cause the frangible disk to rupture, thereby exposing a flow path between the inlet and the outlet through which the gas can escape. A thermal trigger engages the seal plug within the cavity to restrict movement of the seal plug and maintain a seal of the passage when a temperature adjacent to the housing is below a predetermined temperature threshold.

Abstract: The adaptive braking system (10) default activated proportioning valve (80, 80A, 80B) comprises a proportioning valve that is deactivated during normal and adaptive braking system operation. Should the adaptive braking system (10) experience a failure so that the related wheel or wheels (49, 59) of the vehicle no longer receive an appropriate braking pressure from a pressure producing mechanism (12) of the vehicle, the proportioning valve (80, 80A, 80B) is activated by the electronic control unit (70) of the adaptive braking system (10) so that the braking pressure is proportioned accordingly. The valve contains a fusible link that is disipated to allow the valve to proportion.

Abstract: The valve has an outlet safety channel (20) closed by a burstable diaphragm (26) wedged between the body (10) of the valve and a plug (24) fitted detachably in the body (10) of the valve, the said plug (24) comprising an axial passage (28) in communication with the outside and filled with a fusible material (32) up to where it comes into contact with the diaphragm (26). A rubber seal (30) resistant to temperatures above the melting point of the fusible material obstructs the axial passage (28) towards the outside.

Abstract: A trip valve operator for actuating quarter turn valves comprises a return actuator, multi-stage leverage means for reducing the trigger load, a trigger, and one or more sensors or other trip actuators. The multi-stage leverage means comprises pivotally connected levers in series which form a compact mechanism, variously taking the form of four bar linkage or concatenated four bar linkage, that produces high leverage and low frictional holding torques at the reset position for reliable triggering, and that accommodates quarter turn actuation and can be single action reset. The operating areas of the successive stages of leverage overlap. Other multi-stage leverage means includes a leveraging release lever in which the short leverage arm has a land which lies in a radial plane with respect to the mounting pivot thereof for engaging a previous stage of leverage. Reset is provided by arm means which re-engage near the reset position.

Abstract: In a thermal responsive relief valve, an elongated tubular valve body axially contains a strut secured at one end portion to the bore of the valve body and axially contained at its other end by a piston sealed with the valve body bore at one of its ends. A fusible material is interposed between one end portion of the strut and the valve member surrounding the last mentioned strut end portion.

Abstract: A fail-safe thermostat for vehicular cooling systems is positioned in a junction leading to an internal coolant passageway, a radiator passageway and a bypass passageway. An open housing seated in the junction supports a fixed central rod extending into the wax filled interior of a movable cylindrical member which controls the position of the interior segment of a main valve. Expansion of the wax forces the cylindrical member in a first direction against a compression spring. Fusible alloy is disposed in the coupling between the cylindrical member and the main valve, and melts at a specific temperature range in excess of the normal range. When this occurs the coupling is released in such a way that the spring forces the valve member to a second limit position opposite to the direction of expansion. A bypass closure member at one end of the cylindrical member may be used to close the bypass passageway concurrently with increased temperature.

Abstract: A pressure relief valve, for pressurised fluid storage vessels such as a rail tank car for volatile liquids, has a flap valve for rotational movement in a valve passage between a closed position seated on a valve seat and blocking the passage and an open position in which the passage is substantially unobstructed. A spring arrangement for keeping the valve closed against a rated pressure includes an externally mounted spring system which, when exposed to fire conditions which might threaten the wall strength of the vessel, loses spring temper so as to reduce the closing pressure of the valve.

Abstract: An air diffuser adapted for mounting in a building for controlling air pressure within a space, the diffuser comprising a tile such as can be placed in a ceiling and having an air inlet side and an air discharge side, a wall providing an air flow port in the tile for allowing the flow of air from the inlet side to the discharge side, a damper adapted in one position to substantially seal against the wall adjacent the port to prevent air flow through the port, and in other positions removed from the wall to allow variable air flow through the port, an electrically operated actuator connected to the building and/or the tile, and to the damper for moving the damper toward or away from the wall, guide posts on the tile extending generally axially of the direction of movement of the damper toward and away from the wall, and follower apertures in the damper slidable over the guide posts to allow substantially only linear movement of the damper.

Abstract: A flow controlling valve is provided for disposition within a pipeline or the like which may be subject to excessive vibrations and/or temperature and the valve includes a valve member shiftable between open and closed positions, yieldingly biased to the closed position and retained in an open position through the utilization of frangible retaining means having a first portion connected to the valve member and a second portion anchored relative to the body of the valve through the utilization of a fusible link.

Abstract: A combination thermal or pressure activated relief valve is disclosed. The valve includes a housing having an inlet and an outlet formed therein. The inlet is adapted to be attached to a pressure source while the outlet is in communication with an area having a lower pressure value than said pressure source. An insert is secured in the outlet and includes a stem having a first passage formed therethrough and a helical groove formed about its outer periphery. The groove cooperates with the housing to form a helical passageway between the inlet and the outlet. A fusible material is inserted into the helical passageway and normally blocks fluid flow therethrough and is fusible at a selected temperature to permit fluid flow therethrough. A second member is secured to the insert and has a passage formed therethrough which communicates with the first passage formed in the insert. A pressure responsive lamina is positioned across the passage for normally blocking fluid flow therethrough.

Abstract: A valve plug (22, 22a, 22b) is biased inwardly by a spring (78, 78a, 78b) to close an opening (6, 6a, 6b) in a tank. A stem (32, 32a, 32b) extends axially inwardly from the plug (22, 22a, 22b). The stem (32, 32a, 32b) has an inner portion (36, 36a, 36b) which is mechanically interlocked with an outer portion (52, 52a, 52b) to directly transmit axial forces created by the spring (78, 78a, 78b). Fusible material (66, 66a, 66b) holds the stem portions (36, 36a, 36b, 52, 52a, 52b) in an interlocking position but carries only relatively small loads. The plug (22, 22a, 22b) and stem (32, 32a, 32b) move against the force of the spring (78, 78a, 78b) to relieve pressure. At elevated temperatures, the fusible material (66, 66a, 66b) melts to allow the stem portions (36, 36a, 36b, 52, 52a, 52b) to separate and the plug (22, 22a, 22b) and outer stem portion (52, 52a, 52b) to move away from the opening (6, 6a, 6b).

Abstract: A fuel cap for closing the filler neck of an off-road vehicle. The fuel cap includes a cover having an opening therethrough and a concentric housing extending downwardly into the filler neck and connected to the cover. A valve body having an upper and a lower chamber disposed therein is fitted into the housing and extends downwardly into the filler neck. The upper chamber and lower chamber have vent openings which cooperate with the opening in the cover to provide a vent path to allow the fuel tank to vent fuel vapor to the atmosphere. The lower chamber includes a floatation ball to seal one of the vent openings in the lower chamber to prevent fuel spillage when the vehicle is subjected to a bump, or is operated on a grade. The upper chamber includes a steel ball which seals one of the vent openings in the upper chamber to prevent fuel spillage when the vehicle is overturned to a substantially vertical position.

Abstract: A safety relief valve for liquified gas containers has dual pilot valves, one set to a given operating pressure and one adjustable. A main valve is responsive to the pilots, which are connected in parallel. The adjustable pilot is continuously adjustable and may be set below the operating pressure of the set pilot. The main valve has an inlet at the tank wall and a valve seat with a lateral outlet downstream thereof. The piston is faced at the inlet side by the gas pressure in the tank and on the control-pressure space side with a closing pressure adjusted by the pilots. If a given pressure in the tank is exceeded, the piston lifts from its valve seat, so that gas can flow from the inlet to the outlet. The second pilot valve can be provided with a thermal or other enabling means to initiate its operation when desired.

Abstract: A diaphragm type gas pressure reducing regulator and adapter in combination in which the adapter serves to isolate the diaphragm from the valve seat in the regulator in response to a spontaneous ignition. The adapter comprises a plunger which intercouples the valve and the diaphragm assembly during normal operation of the regulator and isolates the diaphragm assembly from the valve in response to a spontaneous ignition within the regulator body upstream of the diaphragm assembly.

Abstract: The invention provides a conduit blow out preventer utilizing movement of an annular piston to selectively effect the reduction of flow through the blowout preventer to a pre-determinable value or alternately, terminate flow therethrough altogether in response to the occurence of a pressure fluctuation in the fluid conduit to which the conduit is attached. An annular fluid conduit is defined between the interior bore of the annular piston and a support post. A discontinuous annular sealing element is provided in such fluid passage to provide an orifice, creating a pressure differential across the piston in the event of a biased flow surge. Axial movement of the annular piston results in closing of the outward fluid flow in the annular fluid passage and flow is then restricted to that permitted by a radially disposed orifice communicating with the annular fluid passage. A check valve in a fluid inlet is normally held off its seat by a connecting rod extending to the support post.

Abstract: A device in a fluid flow path moves to perform a fluid flow control operation at a predetermined high fluid temperature. A mechanism normally locked out of participation in the movements of the device is released at a selected fluid temperature higher than the predetermined fluid temperature and compells the device to a performance of the control operation. The thermostatic device and the locking and release mechanism are incorporated in a unitary structure insuring the carrying out of a control function even when elements of the device having primary responsibility therefor fail or respond inadequately.

Abstract: A valve plug (22, 22a, 22b) is biased inwardly by a spring (78, 78a, 78b) to close an opening (6, 6a, 6b) in a tank. A stem (32, 32a, 32b) extends axially inwardly from the plug (22, 22a, 22b). The stem (32, 32a, 32b) has an inner portion (36, 36a, 36b) which is mechanically interlocked with an outer portion (52, 52a, 52b) to directly transmit axial forces created by the spring (78, 78a, 78b). Fusible material (66, 66a, 66b) holds the stem portions (36, 36a, 36b, 52, 52a, 52b) in an interlocking position but carries only relatively small loads. The plug (22, 22a, 22b) and stem (32, 32a, 32b) move against the force of the spring (78, 78a, 78b) to relieve pressure. At elevated temperatures, the fusible material (66, 66a, 66b) melts to allow the stem portions (36, 36a, 36b, 52, 52a, 52b) to separate and the plug (22, 22a, 22b) and outer stem portion (52, 52a, 52b) to move away from the opening (6, 6a, 6b).