Abstract: An expansion-type fuse safety device for an accumulator has a fuse packing having a through hole of a diameter smaller than the outside diameter of a sealing portion of the flanged valve casing. The valve casing is inserted into the through hole of the fuse packing so as to project outward from a pressure vessel through a passage hole formed in the pressure vessel. A tightening nut is screwed to the projecting end of the valve casing so that the fuse packing is pressed between the inner surface of the pressure vessel and the flange of the valve casing.

Abstract: An arrangement for discharging to the atmosphere a jet of fluid released by a pressure relief valve in a pressurized hot fluid circuit of an aircraft, wherein the pressure relief valve is placed near a wall of the aircraft, e.g. the wall of an engine pod, so that any jet of fluid released by the valve is directed towards the wall, and the wall is provided with an orifice at the place where the fluid jet would hit the wall, the orifice being closed by a consumable plug designed to melt, at least partly, as a result of the heat of the fluid jet so that the jet is able to discharge through at least a part of the orifice.

Abstract: A fusible plug structure is provided for use on a refrigeration system component. Among the features of the invention is means of a novel character for connecting a gasket or sealing member to one end of a fusible plug body, which assures a proper and effective seal when the plug body is assembled with a companion female fitting member fixed to the refrigeration system component. The connecting means markedly facilitates proper placement of the sealing member regardless of the particular position of the female fitting and supporting refrigeration system component. The connecting means may take various forms, and illustrative thereof is a substance such as oil or grease. Alternatively, one end of the fusible plug body may be so configured as to receive the sealing member in close fitting contact therewith. The sealing member itself may be variously configured.

Abstract: Method and means for redistributing fluid flow through a catalyst bed in a reactor by applying uniform flow resistance. A mat to which a series of uniformly spaced disks are adhered is placed within the catalyst bed. The disks are formed of a material capable of withstanding the temperatures within the reactor, while the mat is formed of a material which is not. The mat is destroyed by the heat of the reactor, leaving the disks in place. Localized high flow rates are smoothed out by the flow resistance provided by the disks, with flow taking place between the disks. Since the disks are small relative to the opening used to dump the spent catalyst, special consideration for disk recovery and handling are not necessary as the disks flow out the opening with the spent catalyst.

Abstract: A hydrocarbon monitoring valve which is operative to close whenever hydrocarbons are present in a fluid passing therethrough has a hollow hydrocarbon-sensitive canister mounted in a generally vertically disposed portion of a housing of the valve. The presence of hydrocarbons within fluid passing through the canister produces rapid deterioration of the canister, with the result that mechanical linkage coupled to the canister acts to close a valve element within a generally horizontally disposed portion of the valve adjacent an inlet, thereby shutting the valve from further flow of fluid therethrough.

Abstract: A fire and corrosion resistant enameled exteriorly sealing valve which may be mounted to a nozzle of a reaction vessel, comprising: a valve housing (1) having a valve opening therein, said housing being both internally enameled and enameled at said opening; a valve shaft (3) comprising a valve head (4) proximate one end thereof, said shaft and valve head being enameled on its outer surface; said valve head having a ground seat surface (4a) for mating with a housing seat surface (2a) at said opening provided at an extension (2, 21) of the valve housing (1); a stuffing box for the valve shaft (3), containing a packing (6, 7) out of material resistant to high temperatures; a spring package (17) engaging the valve shaft (3) and biasing the valve head (4) in a closed position, and by which a sufficiently high sealing force is provided between the two ground seat surfaces (2a, 4a) to maintain a seal in the presence of a fire; and said valve further comprising an actuation device (16) for opening and closing the val

Abstract: As a coupling is connected, an improved heat fusible actuator member in a plug assembly moves a value member in a socket assembly from a closed position to an open position against the influence of a biasing spring. When the coupling is exposed to excessive heat, the one piece actuator member fuses and is deformed under the influence of force applied against the actuator member by the valve member to enable the valve member to close. In one embodiment, the actuator member includes a cylindrical sleeve which is resiliently compressible to enable retaining lugs on an inner end of the sleeve to engage in an annular retaining surface on a metal plug body. At the same time, an annular rim on an outer end of the sleeve engages a circular outer end surface of the plug body. A bridging member extends across the fluid passage through the sleeve and is engaged by the valve member.

Abstract: A thermostat adapted for use in a cooling system of an engine designed to operate between minimum and maximum operating temperatures is partially constructed from a meltable material that has a controlled melting point at the maximum operating temperature of the engine. If the thermostat fails to allow coolant to flow from the engine to a radiator, thereby causing the temperature of the engine to rise beyond its maximum operating temperature, the meltable portions of the thermostat are melted by the coolant, resulting in a path for the coolant to flow from the engine and to the radiator.

Abstract: An improved heat sensitive cut-off for blocking the flow through a gas conduit or the like of the type comprising first and second cut-off members disposed in the conduit which co-operate to block flow through the conduit when they are brought together. The first cut-off member has a socket therein. A spring biases the cut-off members together, and a spacer between the cut-off members for separates them to permit flow through the conduit. The spacer has a portion penetrating partway into the socket in the first cut-off member. A plug of a relatively low melting point material is located in the bottom of the socket for temporarily preventing the spacer from penetrating further into the socket. The socket and the spacer are configured so that when the plug melts the spacer can penetrate further into the socket sufficiently that the spring can move the cut-off members together to block the flow through the conduit.

Abstract: A fire damper or the like having butterfly-type gas flow control blades includes a heat responsive blade release assembly that incorporates a standard fusible link accessible from externally of the assembly. The fusible link holds together pivoted side plates of a housing from which extends a pair of arms normally holding the blades in their open positions. When the link melts, the side plates move apart, allowing the arms to open and release the blades. The assembly is also adjustable to vary the extent to which the blades open.

Abstract: A temperature actuated relief plug assembly for mounting in a port in a pressurized structure to provide pressure relief when the temperature of the gases in the pressurized structure exceeds some predetermined temperature, the assembly including a metallic body having a portion for mounting in the port in the pressurized structure and a portion extending externally therefrom, the metallic body having a chamber therein and an opening communicating the chamber with the interior of the pressurized structure, and a temperature actuated structure closing the opening in the body and exposed to the temperature of the gases in the pressurized structure, the temperature actuated structure including a first member with a passage therethrough mounted in the opening and a second member soldered to the first member in position closing the passage therethrough by a solder material that has a predetermined melt temperature which will cause the second member to separate from the first member when the temperature of the gase

Abstract: A fire isolation device having a valve designed to close after a given temperature has been reached by a fusible nose member in the form of a sleeve of fusible material. The device has a passageway therethrough and a self-closing valve member having a poppet and a seat disposed in the passageway with the poppet being biased toward the seat to a valve closed position. At least one aperture through the nose member provides for continuous fluid flow through the device around the poppet and the seat. The nose member is positioned to hold the valve in an open position against the bias on the poppet. The seat has a flow path on its outer end dimensioned to fit the nose member and a flow path towards its inner end larger in diameter than the nose member in an area occupied by the aperture to permit flow therethrough when the nose member holds the valve in an open position. The nose member is made of a material designed to melt in the neighborhood of 700.degree. F. when the fire isolation device is exposed to 2000.

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 fire damper kit is set forth wherein a fire damper box is formed with a first framing angle iron fixedly secured thereto with a second angle iron slidable thereon to secure said damper and sandwich a fire wall between said opposed angle iron collars. A fusable link positions a fire damper door in a first position to enable heat flow through associated duct work wherein a chimney fire will effect a release of said door to prevent spread of a fire through the duct work.

Abstract: A hot water system has a aperture in the hot water line normally blocked by a liquid and gas filled vial which is sealed against the aperture to close it off. However, when hot water in the system reaches a predetermined temperature the expansion of the liquid in the vial fractures it, unblocking the aperture and allowing hot water to escape from the hot water line. Cold water coming into the cylinder will prevent any further temperature rise.

Abstract: Apparatus for the controlled venting of gases from the containment housing of a chemical or nuclear reactor. The vent path is configured as a manometer filled with a low melting point metal. Gases passing through the manometer are exhausted to a tank of scrubbing solution where toxic materials are removed prior to venting the gases from the containment housing.

Abstract: A method is disclosed for forming a thermally activated pressure relief valve which is designed to be attached to a pressure vessel. The valve contains a body having an inlet and an outlet in fluid communication with each other and an insert having a helical groove formed about its outer periphery. The method includes securing the insert in the outlet such that the helical groove cooperates with the body to form a helical passageway. A molten fusible material is then introduced into one end of the helical passageway. A force is exerted on the material to cause it to move through the helical passageway and displace any trapped air, gas or foreign matter which might be present therein. Once the material completely fills the passageway, it is allowed to cool and solidify. This method is advantageous in producing a safety relief valve which can operate at higher service pressures and temperatures over an extended period of time.

Abstract: A coupling includes plug and socket assemblies which are interconnectable to connect conduits in fluid communication. A heat fusible actuator member is connected with a valve member disposed in the socket assembly. The actuator member extends axially outwardly from the valve member and has an outer end portion which is engageable with the plug assembly to move the valve member from a closed condition to an open condition as the plug and socket assemblies are interconnected. The actuator member is fusible upon exposure to excessive heat to release the valve member for movement from the open condition to the closed condition under the influence of a biasing spring. As the valve member moves from the open condition to the closed condition, the size of the actuator member is reduced as it is compressed into a unitary body under the influence of the force applied against the valve member by the biasing spring.

Abstract: A thermally activated valve is disclosed for attachment to a pressurized vessel such that substances contained therein can be released at a selected temperature value. The valve includes a body having an inlet and an outlet in fluid communication with each other. The inlet fluidly communicates with the interior of the pressurized vessel while the outlet is in communication with an area having a lower pressure value. Secured in the outlet is an insert having a stem. The stem has a helical groove formed about its outer periphery and has at least one small aperture which is in communication with the helical groove. The insert cooperates with the body to form a helical passageway therethrough. Positioned within the helical passageway is a material for normally blocking fluid flow therethrough which is fusible at a selected temperature to permit fluid flow therethrough.

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 fluid pressure relief apparatus of the rupturable type which ruptures at different pressures depending upon the temperature of the fluid in contact therewith. A rupture member is provided supported by a support member which is maintained in place by a material having a selected melting point. When the fluid under pressure reaches the temperature at which the material melts, the support member ceases to support the rupture member causing the pressure at which rupture occurs to be lowered. A method of relieving pressurized fluid at a predetermined pressure level when the temperature of said fluid is below a preselected temperature and at a lower pressure level when the temperature is above said preselected temperature is also provided.

Abstract: A container structure for a dangerous material. An inner container defines a chamber for receiving the dangerous material, an outer container surrounds the inner container, and a fluid chamber is disposed between the inner and outer containers. A body of non flammable liquid is disposed in and completely fills the fluid chamber, and the body of liquid is substantially confined in the fluid chamber. A vent space is disposed between the inner and outer containers in the area above the fluid chamber. The outer container has a bottom wall that is adapted to slidably engage a support surface so that the container structure can slide on the support surface in response to an external impact overcoming its inertia.

Abstract: A fuel holding apparatus and method utilizes a plurality of capillaries which actually confine the fuel. The fuel holding method and apparatus can be used in vehicles and high performance aircraft to reduce the likelihood of an explosive ignition of the fuel in a crash situation.

Abstract: An improved, soft-seated fire-safe ball valve is disclosed. The ball valve includes a body having a central passageway, a ball member positioned in the passageway, and a pair of radially inwardly extending shoulders in the passageway disposed circumferentially thereof on opposite sides of the ball member. The ball member includes a fluid flow opening therethrough and is mounted for selective rotation between valve open and closed positions to control fluid flow through the valve. An improved seat assembly is provided comprising a rigid reinforcing ring, an elastic seat ring supported by the reinforcing ring and configured for fluid sealing engagement to the ball member, and a deformable, heat resistant secondary seat ring interposed between the elastic seat ring and an associated one of the pair of shoulders. Also, a weir ring may be advantageously received in the seat ring. Upon fire damage to the elastic seat ring, the secondary seat ring engages the ball member to seal the valve.

Abstract: A means and method for assuring a tight sealing closure of a valve in a high temperature condition, such as fire, is provided by an expendable link on the downstream side of the valve stem and an intumescent material and piston on the upstream side of the valve stem so that, at an elevated temperature condition, the expendable link gives way to create a tolerance allowing the piston driven by the expanding intumescent material to shift the valve closure element in the direction of the valve seat to accommodate for any deterioration of the valve seal.

Abstract: A valve assembly comprising a valve housing defining an internal valve cavity and a fluid flow passageway, a valve element rotatably received in the valve cavity to control flow through the passageway, one of the valve housing or the valve element defining a seating surface, the other defining a seal member carrying surface, and a seal member carried on the seal member carrying surface on either the valve housing or the valve element for engaging the seating surface and effecting a seal between the valve using the valve element, the seal member being comprised of an intumescent material.

Abstract: A valve assembly comprising a valve housing defining an internal valve cavity and a fluid flow passageway, a valve element rotatably received in the valve cavity to control flow through the passageway, one of the valve housing or the valve element defining a seating surface, the other defining a seal member carrying surface, a coating of intumescent material disposed on at least a portion of either the seating surface or the seal member carrying surface, and a seal member carried on the seal member carrying surface on either the valve housing or the valve element for engaging the seating surface and effecting a seal between the valve using and the valve element.

Abstract: A fusible thermally responsive device (20) for mounting in a bore (12) provided for it in a wheel (10) to vent an overpressure condition caused by heat generated in an aircraft wheel and brake assembly comprises a rod-shaped length of a thermally activated virgin eutectic alloy (34) exhibiting a tolerance within .+-.1.degree. F. of a specific melt temperature established for the alloy, which rod-shaped eutectic alloy in its virgin solid form has one end (34b) machined to a self-holding taper such as to be press-fit into a mating bore (28,48) having the same self-holding taper (28b,48b) in a cylindrical carrier member (22,42). The carrier is mounted in the wheel bore, either from the inside (22) or the outside (42) of the wheel, and a pair of O-ring type seals (32,52,62) provide a positive sealing relationship between the virgin eutectic (34) and the carrier (22,42) and between the carrier (22,42) and the wheel (10).

Abstract: A valveless gas shut-off and transfer device has a looped conduit with a solder-like material in the loop. This eutectic material solidifies below its critical temperature to block the conduit and is liquefied above its critical temperature to allow passage of gas through the conduit. Baffles on the outlet retain the liquefied solder when gas is passing through the device. The liquid solder flows back to the loop when pressures at the inlet and outlet are equalized. When the solder solidifies, the device is again blocked.

Abstract: A heat sensitive air/gas sampling device including an apertured housing for connection to a pipe leading to a smoke detector device the housing including a blocking device for preventing air/gas to enter the housing, the blocking device being ineffective to prevent ingress of air/gas when the surrounding temperature exceeds a predetermined maximum for a predetermined period of time. The blocking device may be held by, or composed of, a low melting point wax. The blocking device may be comprised of a bimetallic strip.

Abstract: A bidirectional valve useful at all temperatures from cryogenic to extreme fire temperatures. The sealing means for the bidirectional valve comprises a metallic sealing element having a pair of spaced sealing lobes defined thereon which are coated with a Teflon compound. A third sealing lobe is defined on the metallic sealing element between the pair of sealing lobes and is constructed solely of metal. A pair of coated sealing lobes further function as wipers to prevent sand, dirt or similar foreign particles from becoming crushed between the valve disc and metallic sealing lobe during the final closing of the valve. When the valve is exposed to fire conditions, the Teflon coated sealing lobes melt out leaving the metallic lobe as the fire safe sealing lobe.

Abstract: A ball valve with an emergency sealing device has a ball having a through hole rotatably mounted within a valve body; ball seat retainers are positioned between the valve body and the ball; ball seats, made of a heat destructible material are mounted on the ball seat retainers and brought into sealing contact with the ball surface, one each to the ball seat retainers; first sealing rings, made of a heat destructible material for functioning under normal conditions are mounted one each on portions of the ball seat retainers where they contact the valve body; annular projection surfaces are provided on each ball seat retainer on parts of the outer circumferences of the ball seat retainers; second sealing rings, made of a heat resistant, flexible material for functioning in case of emergency, are mounted one each on portions of the annular projection surfaces of the ball seat retainers where they contact the inner circumference of the valve body and have pressing mechanisms engaging them, the diameter of the sec

Abstract: An improved gate valve having a body with an inlet into the valve chamber and an outlet from the chamber, a gate in the chamber, a bonnet with an opening therethrough, secured to the body, a stem connected to operate the gate and extending through the bonnet opening, a seat in the bonnet, a shoulder on the stem, heat responsive means holding the stem out of back seating position during normal operation and releasing to back seat responsive to excess heat, body bushing surrounding said inlet and outlet and sealing against the gate, each of the bushings having resilient sealing means and a sealing lip for sealing against a sealing surface on said body.

Abstract: A valve (10) having an expansible gate assemblage of ported juxtaposed gate and segment members (18, 19) which are movable into sealing engagement with upstream and downstream valve seats (28) about the flow passage (12, 14) in the open and closed conditions of the valve wherein the valve includes pressure relief means which relieves excessive pressure in the valve chamber (11) into the upstream flow passage (12) when the environment in the chamber reaches a preselected temperature with the valve retaining capability of providing an upstream seal in the event of subsequent downstream leakage. The pressure relief means is installed in the segment member (19) of the gate assembly and comprises a passage (43) extending from the port (16) through the segment to the sealing face (25) of the segment member at a location which is exposed to the upstream flow passage (12) in the valve closed condition.

Abstract: A sealing assembly comprises three non-compressible and relatively movable members, the first and second members having a first elastomeric sealing element located between them, the second and third members having a second elastomeric element located between them to urge the second member away from the third member and towards the first member. Spaces are provided between the second and third members and are occupied by an elastomeric spring biassed to urge the second member away from the first member and a metallic spring biassed to urge the second member towards the first member. The force exerted by the elastomeric spring is greater than and opposite to that exerted by the metallic spring.The sealing assembly is fire safe and particularly suitable for use in a ball valve.

Abstract: A seating assembly for use in a rotary valve comprising a metallic seat ring having a radially inner metallic sealing section and a polymeric seat ring having a polymeric sealing section for sealing engagement with a valve element, each of said rings having a radially outer retaining section for mounting the respective rings in a valve body, both of said rings having an intermediate spacer section interconnecting the radially inner sealing and radially outer retaining sections. The spacer sections have convoluted runs forming interlocking formations to prevent relative radial movement of the seat rings, and there are a multiplicity of circumferential windings of strands in surrounding relation to the metallic sealing section.

Abstract: A fire-safe butterfly valve (FIG. 2) provides bi-directional sealing. In normal duties a polymeric seal provides forward and reverse sealing against the edge of the valve disc, the polymeric seal being resiliently loaded in the axial direction of the valve by a resilient metal ring. The metal ring provides a bi-directional seal with the disc edge in the event of destruction of the polymeric seal by fire. The metal ring in transverse cross-section consists of an arm having a curved radially inner end presenting a convex surface for engagement with the disc edge. For fluid pressure acting from the smaller diameter side of the disc, in the burnt out condition, the curvature of the radially inner end of the metal ring gives rise to an increased sealing force with the disc edge as the disc moves in response to the fluid pressure and the ring inner end remains in rolling contact with the disc edge.

Abstract: A thermally responsive slam shut valve assembly includes a generally tubular body member having an internal valve seat at one end, a spider member connected to the other end of the body member, a cup shaped valve inside the body member, a valve stem connected to the valve and extending through a central opening in the spider member, a coil spring surrounding the stem between the valve and the spider member, and fusible means surrounding the stem outside the body member for preventing the valve from moving into sealing contact with the valve seat until the temperature of the fusible means goes above a predetermined threshold.

Abstract: Damper blade actuator assembly for use in association with a damper having damper frame means adapted to be associated with an air duct system, and defining an air flow opening, and movable damper blade means operable for partially or completely obstructing such air flow, said actuator assembly comprising, a drive shaft adapted to be operatively coupled to suitable motor means for rotating said drive shaft in either direction, an operating arm swingably mounted adjacent said drive shaft and being rotatably movable relative to said drive shaft and connectible with said damper blade means, a coupling arm attached to said drive shaft for rotation therewith adjacent said operating arm, spring means connected between said operating arm and said coupling arm, said spring means urging said operating arm to move independently of said coupling arm in a direction tending to close said damper for emergency operation thereof while said coupling arm remains stationary, condition-sensitive retaining means connected between

Abstract: Disclosed is a flexible sealing ring for a valve having a generally S-shaped cross-section and an extension from one end of that S-shape. The extension is mounted on the valve body and serves as a cantilever means for the sealing ring which is thus sealingly engagable with the peripheral sealing surface of a movable valve member pivotally positioned within the valve passageway. The sealing ring is formed from materials capable of withstanding high temperatures (1000.degree. F.) for sustained periods without impairment of its' sealing capacity. The sealing ring may be used in cooperative combination with other sealing rings, including heat destructible materials such as "Teflon", to form valve seal means effective over a range of temperatures and pressures, including firesafe valve seal means.

Abstract: A fire-damper has a support adapted to be secured in the duct and having a pair of pivots defining respective parallel and spaced-apart pivot axes traversing the duct. Respective damper flaps are pivotal on the pivots about the respective axes between an open position extending generally parallel to and spaced from each other in line with the duct and a closed position generally coplanar transverse to the duct. Thus the flaps define in the open position open flow spaces between and to both sides of the flaps and in the closed position the flaps substantially block flow through the duct. A spring urges the damper flaps continuously into the closed position. A fusible link is connected between the flaps offset from the axes for retaining the flaps in the open position unless the link is heated beyond a predetermined temperature. This link extends across the flow space formed between the two flaps.

Abstract: A flanged cylindrical valve casing is loosely inserted into a bore of a pressure container from its inside towards its outside. A fuse packing is interposed between the flange and the inside surface of the pressure container so that when this fuse packing has molten the flange may make direct contact with the pressure container, to form a passageway between the flange and the pressure container communicating with the inside of the pressure container, and this passageway communicates with a gap clearance around the cylindrical valve casing as well as the outside of the pressure container.

Abstract: An improved control line blow out preventer valve is provided, having a fluid pressure chamber interposed in a control line extending from a surface control panel to a downhole safety valve in a subterranean well. Axially spaced inlet and outlet openings are provided in the pressure chamber and a piston is reciprocally mounted intermediate the inlet and outlet openings. A sealing plug carried by the piston cooperates with a seal surrounding the inlet opening. A bypass passage through the piston mounts a check valve which permits free fluid flow in the direction from the control panel to the subsurface safety valve but only a restricted fluid flow in the opposite direction. A check valve is mounted in the outlet passage to prevent fluid flow from the subsurface safety valve to the control panel. A fusible link normally maintains this check valve off its seat so that it does not close until the occurrence of an elevated temperature caused by fire.

Abstract: A novel seat especially adapted for a butterfly valve is provided which is formed both of metal and "soft" material so as to furnish a "bubble tight" seal in normal operating conditions and a metal-to-metal seal in fire situations. The seat is uniquely constructed and is permanently deformed by the disc or closure member of the valve to form a precise size and configuration corresponding to the size and configuration of the disc.

Abstract: Apparatus for venting a pressurized gas container is disclosed. The container bottom moves outward as a result of over-pressure caused by excessive temperature. The bottom pushes against a member of the housing, thereby forcing the nozzle head to hit and become fixed against a second member of the housing. Continued movement of the container body toward the nozzle head effectively depresses the nozzle head, thus releasing gas from the container. In a preferred embodiment, a safety plug in a passageway in the nozzle head is melted to provide a channel for the vented gas.

Abstract: A fuel tank of a synthetic resinous material, especially for motor vehicles, with a connecting socket of a synthetic resinous material arranged in a lower zone of the fuel tank. The connecting socket is provided on its outside wall with a metal sleeve. The metal sleeve freely projects into an interior of a fuel tank and terminates beyond an inner end of the connecting socket. An outer end of the metal sleeve is set back or axially spaced from an outer end of the connecting socket.

Abstract: A sealing structure for use in valves, including butterfly valves, having a body with a flow passage and a movable valve disc in the flow passage. Two sealing surfaces are mounted in the body to engage the disc when it is in a closed position to provide a bubble-tight seal. The sealing structure includes an annular seal retaining cavity with a slot opening to the flow passage. A metal seal ring having a lip portion (which has a first seat) projecting through the slot into the passage is contained within the cavity adjacent to a primary heat-destructible seal ring, which has a second seat. The first seat and the second seat are engageable with the sealing surface of the disc to provide two axial seals. When the valve is closed, a radially-directed force is developed at the second seat (on the heat-destructible seal) and at the first seat (on the lip portion of the metal seal) in response to contact with the disc to effect a heat-destructible seal and a second, metal-to-metal seal, respectively.

Abstract: A fire-safe valve structure for a valve of the type having a valve body with a flow passage (18, 20) therethrough and a valve chamber which houses a valve element (70) for opening and closing the flow passage, the valve chamber becoming sealed off from the flow passage in the open and closed conditions. An annular metallic seat (110) with a port (200), which extends between its inner and outer annular surfaces (186, 188) and so located as to communicate the valve chamber with the flow passage, is disposed in an annular seat pocket (28) formed around the flow passage (20) on the upstream side of the valve. The seat pocket (28) opens to the valve chamber (50) and the metallic seat (110) is provided with sealing means (196) for sealing with the valve element (70) in the open or closed condition.

Abstract: A flow control valve with a valve closure element is provided having at least one annular resilient seat member and an annular flexible metal seat member positioned adjacent to it. The flexible metal seat is held in position by heat resistant gaskets and is biased against the resilient seat member. Upon the failure of the resilient seat to seal because of melting or deterioration caused by exposure to heat, the flexible metal seat member springs into position to provide a fire and heat resistant metal-to-metal seal with the valve closure element.

Abstract: A fire safe disc valve comprising a valve body having a flow passageway therethrough, a disc shaft rotatably mounted in the flow passageway and a disc mounted on the disc shaft, the disc being rotatable to and from a position normally closing the flow passageway by sealingly engaging a disc sealing member. An operating stem, extending through a stem operating aperture in the valve body, engages the disc shaft for rotation thereof, and an elastomeric packer seals the aperture about the operating stem. The disc shaft is displaceable along the flow passageway whereby the disc will close the passageway if the disc sealing member is destroyed, and the operating stem is axially displaceable in the stem operating aperture whereby the aperture is sealed by fluid pressure pressing the operating stem against a stem sealing seat if the stem packer is destroyed.