Abstract: An enhanced shipping container apparatus that maintains packages is described having integrated fire suppression. The apparatus has a container base supporting the packages, multiple container walls coupled to the container base, and a container top coupled to each of the container walls. A fire suppression panel is integrated as part of one or more of the walls and top portion, and has a support sheet of fire resistant material; an interior exposed sheet of temperature sensitive material; a sealed boundary connecting the support sheet and interior exposed sheet on peripheral edges (where the sealed boundary, support sheet and interior exposed sheet define a holding cavity), and integrated fire suppression material in the holding cavity. The temperature sensitive material of the interior exposed sheet releases the integrated fire suppressant material from within the holding cavity when the temperature sensitive material of the interior exposed sheet is exposed to a threshold temperature.

Abstract: Structure for reducing sloshing noises, said structure being provided for disposal in a liquids container for a motor vehicle, having a random arrangement of mutually interlinked threads, wherein a plurality of the threads at least in portions are connected in a materially integral manner to at least one or a plurality of further threads of the structure, wherein the structure has at least one side in the region of which a planar cover of the random arrangement of mutually interlinked threads is provided at least in portions.

Abstract: A hydrogen storage device at least comprising a container with a first volume. A bulk material is arranged in the container, the bulk material comprising at least a plurality of pellets produced by a pressing method. Each pellet comprising at least a first material capable of storing hydrogen and a second material as binder for the first material provided in powder form prior to production by way of a pressing method.

Abstract: An explosion relief valve for a crankcase of an engine includes a carrier plate, a cap, and an annular flame arrestor. The carrier plate includes a valve plate that has a sinuous shape for redirecting flame back into the engine. The flame arrestor includes a plurality of layers of smooth metal sheets, with each layer having a pattern of apertures that is different in size and spacing than the pattern of apertures of its adjacent layer. The apertures of each layer are partially, and only partially, aligned with the perforations of its adjacent layers. The layers are laid flush against each other to minimize or eliminate air space between the layers, leaving only the air channels existing between the apertures of the metal sheet layers as passageways for exhaust gases to be released from the valve.

Abstract: An outdoor unit for an air-conditioning apparatus includes a housing; a compressor provided in the housing and configured to compress refrigerant; an outdoor heat exchanger provided in the housing and allowing refrigerant and air to exchange heat with each other; a partition plate provided in the housing and partitioning an inside of the housing into a fan chamber and a machine chamber in which the compressor is provided; an electronic component provided in the machine chamber; a refrigerant pipe provided in the machine chamber and connecting the compressor and the outdoor heat exchanger and disposed above the electronic component; a valve connected to the refrigerant pipe in the machine chamber and disposed above the electronic component; and a drip inhibiting portion that covers the refrigerant pipe and a lower part of the valve and inhibits water dripping from the refrigerant pipe from dripping onto the electronic component.

Abstract: The invention in one form is directed to a trash receptacle and lid assembly configured to aid in the prevention of fires having a rim-stop on the lid, that prevents the lid from being opened beyond the point where the lid center of gravity is located in the open position to ensure that the lid stays closed.

Abstract: A housing according of the flameproof encapsulation protection type having a housing body which has an opening closed by a cover. The opening is surrounded by a flange which is directed outward away from the housing body. The edge of the cover lies flat on the flange. The edge and the flange are both preferably continuous. In any case, the edge and the flange do not have any passage openings for clamping means. In order to clamp the edge against the flange, clamps are provided which hold the edge and the flange pressed against each other in the manner of screw clamps. The clamps are provided with releasable clamping means and are preferably captively retained on the housing body or the cover, the clamps being movable between a closed position, in which the cover is fixedly clamped, and an open position, in which the clamps do not extend over the cover and allow the cover to be opened unhindered.

Abstract: A tank having a sealing plate and a tank body and lifting mechanism for separating the sealing plate from the tank body of a tank are provided. The lifting mechanism includes a pin inserted into a flange of the tank body extending through the sealing plate, and a threaded device coupled to the sealing plate and selectively contacting the pin to apply a pushing force in response to the threaded device being inserted into the sealing plate.

Abstract: A housing with an inner lining, made of an open-pore material, preferably covering at least two sides of the housing, for the reduction of internal explosion pressure. In addition, or alternatively, a molded body made of the open-pore material, for example a bonded fibrous material, may be arranged in the housing.

Abstract: In an embodiment a thermal varistor protection device includes a casing, a varistor embedded in the casing, wherein the varistor includes a first metallization electrode, which is only partly covered by an insulating material of the casing to allow an electrically conductive connection, a first terminal wire electrically conductively connected to the first metallization electrode of the varistor and a contact element electrically conductively connected to the first metallization electrode of the varistor in a region where the varistor is not covered by the insulating material, wherein the contact element is pre-stressed to ensure a fast separation of the contact element and the first metallization electrode when the electrically conductive connection between the contact element and the first metallization electrode becomes loose.

Abstract: The present invention concerns a security barrier for providing protection in a public space or the like, said barrier comprising a mineral wool assembly comprising at least one mineral wool element having an outer liquid impermeable covering and wherein the at least one mineral wool element is adapted for being filled with a liquid. The invention further comprises a method of manufacturing such security barrier and a method of preparing the security barrier for providing protection in a public space.

Abstract: A cabinet For electronic components, the cabinet comprising an outer wall, a closure, and an attachment structure, the cuter wall encapsulating an internal space and forming an opening, the closure being attached to the outer wall by the attachment structure, and the attachment structure allowing movement of the closure relative to the outer wall between an open position where the opening is uncovered and a closed position where the opening is covered by the closure. To enable automatic and fast opening of the cabinet in case of over pressure, e.g. caused by arching of electronic components in the cabinet, the cabinet Further comprises a magnet structure comprising at least one magnet arranged to hold the closure in the closed position and to release the closure in response to a pressure in the internal space.

Abstract: An aircraft includes comprises toilet that includes a protection device configured to contain effects of a malicious device, in order to protect both a fuselage of the aircraft and passengers of the aircraft against the effects of the malicious device.

Abstract: A device for carrying fuel in aircraft and spacecraft includes a carrier element having a longitudinal axis, and a fuel tank with a side wall and a chamber at least partially delimited by the side wall. The tank is arranged in the carrier element. The chamber and the side wall extend in a direction along the longitudinal axis. The side wall has a pressure-receiving component that converts a pressure from the chamber on the side wall into a contraction force acting on the side wall along the longitudinal axis. The contraction force compensates for an expansion force, resulting from the pressure from the chamber and acting on the side wall along the longitudinal axis. This provides an improved device for carrying fuel in aircraft and spacecraft, wherein the aircraft and spacecraft has constant flight mechanical properties because of the device.

Abstract: A power tool includes a tool head having a working element and a powerhead configured to provide power to the working element. The powerhead includes a fluid tank configured to hold a combustible fuel and defines an initial internal volume having an internal pressure. A diaphragm is formed of a flexible material and forms at least a portion of the fluid tank. The diaphragm moves from an unexpanded state to an expanded state when a temperature of the combustible fuel increases above a threshold value. Movement of the diaphragm to the expanded state increases the internal volume of the fluid tank to allow the internal pressure of the fluid tank to remain approximately constant.

Abstract: An Instrumented Spherical Blast Impulse Recording Device (ISBIRD) provides for survivable test measurement of an explosive blast impulse. The ISBIRD includes a spherical housing formed of a metal having a thickness sufficient to survive the explosive blast wave from a test weapon. A test data module of the ISBIRD includes: (i) a three-axis acceleration sensor; (ii) a memory; and (iii) a controller communicatively coupled to the three-axis acceleration sensor and the memory. The controller executes a data acquisition utility to record acceleration data in three-dimensions from the three-axis acceleration sensor during exposure of the spherical housing to the explosive blast wave. An internal support structure of the ISBIRD is attached inside of the spherical housing and attached to the test data module. The internal support structure centrally locates the test data module within the spherical housing during exposure to the explosive blast wave.

Abstract: A Solid Instrumented Spherical Blast Impulse Recording Device (SISBIRD) includes a spherical housing formed of material that is resistant to an explosive blast wave from a test weapon. A test payload bore shaft is accessible through an opening in the spherical housing. A door is fastened over the opening in the spherical housing. A test data module is received in the test payload bore shaft. The test data module includes: (i) a three-axis acceleration sensor; (ii) a memory; and (iii) a controller. The controller is communicatively coupled to the three-axis acceleration sensor and the memory. The controller executes a data acquisition utility to record, in the memory, acceleration data in three-dimensions from the three-axis acceleration sensor during exposure of the spherical housing to the explosive blast wave.

Abstract: A method is described for using cellular glass blocks, cellular glass nodules, hollow glass spheres, or other buoyant glass materials to attenuate oil fire, limit thermal radiation from an oil fire, and reduce the risk of boil-over phenomenon. Cellular glass blocks, cellular glass nodules, hollow glass spheres, or other buoyant glass products may be deployed passively, prior to an ignition event, or actively, as a response to an ignition event to provide control. Cellular glass or other buoyant glass materials may be in any physical shape such as block, sheet, aggregate, or nodule.

Abstract: An example lavatory waste compartment includes a waste bin having a waste compartment for trash, a waste flap providing an opening into the waste compartment for insertion of the trash, and a manually operated trash compactor coupled to a ceiling. The manually operated trash compactor includes an expansion component connected to a compacting head, and a retraction component coupled to the expansion component to hold or retract the expansion component to a stowed position. An increase in temperature above a threshold temperature causes the retraction component to release the expansion component resulting in deployment of the compacting head into the waste bin. An actuation device is provided to deploy the expansion component from the stowed position, and when deployed, the expansion component blocks opening of the waste flap, and the retraction component causes the expansion component to retract to the stowed position via release of the actuation device.

Abstract: The present invention includes systems, assemblies, and methodologies for inhibiting combustion within fluid containers, enhancing the safety of such containers. One aspect includes a novel base module from which assemblies of varying shape and size, suitable for disposing within a variety of different fluid containers, are created. In one embodiment, the base module is made from an expanded mesh which is rolled in a novel cylindrical configuration according to a novel methodology. In another embodiment, the base module may be combined with other base modules to form an assembly. The present invention is also directed to an apparatus and method for creating base modules which allows for varying density of the base modules and therefore varying flexural strength and rigidity of the assemblies. As such, the packing density of assemblies within containers may be optimized to produce the desired effect of inhibiting combustion within the container.

Abstract: The present invention relates to spark traps/arrestors that are unproved relative to those that currently exist. For example, the present invention relates to a spark arrestor/trap that comprises a plurality of features that allows sparks/embers to be more effectively extinguished. The spark trap/arrestor of the present invention has at least two of vanes, conical devices and u-turns that allows for sufficient oxygen and a tortured path that is sufficiently long so as to effectively extinguish sparks and/or embers that enter the system. Alternatively, the system relates to a spark arrestor that comprises all of vanes, conical devices and u-turns that allows for sufficient oxygen and a tortured path that is sufficiently long so as to effectively extinguish sparks and/or embers that enter the system. In one embodiment, the various parts of the spark arrestor can be separated allowing for easy cleaning of the system.

Abstract: The flame arrester is optimized for installation within fuel containers. The flame arrester has an elongate, generally cylindrical skeletal frame having opposing first and second ends. The first end is configured as a mounting flange adapted for permanent, immovable installation within the tank or container and the second end may include a spring-loaded check valve. The frame is covered by a woven or nonwoven textile material, or alternatively, by a porous or foraminous sheet material. Fuel and vapors pass through the cylindrical textile wall, the porosity of the textile serving to prevent flame propagation through the textile material. The frame is formed of a flexible, fuel-impervious plastic material to allow the flame arrester to be bent or curved for installation within a curved tube.

Abstract: An automatic locking apparatus mounted to a trash bin is provided. The automatic locking apparatus may also include a pair of lock bar arms and a lock bar that pivots from an unreleased position to a released position. The automatic locking apparatus may include a pivot bar, a biasing mechanism and a pivot rod. The pivot rod may rotate from a locked position to an unlocked position. The pair of lock bar arms may be perpendicularly joined to the pivot bar. The biasing mechanism may be disposed about the pivot bar so as to engage an upper tab provided by the bar pivot rod, when the bar pivot rod is in the locked position. When the pair of lock bar arms rotate to the released position, torque may be transmitted through the pivot bar to the biasing mechanism so as to urge the lock bar arms back to the unreleased position.

Abstract: A barrier system including a plurality of buoyant members, at least some of the plurality of buoyant members having a heat-resistant core, a median layer thrilled on an outer surface of the heat-resistant core, and an antistatic layer formed on an outer surface of the median layer, wherein at least some of the plurality buoyant members are configured for adhering to other buoyant members.

Abstract: A fuel cell stack casing for housing a fuel cell stack. The fuel cell stack casing may include a resin and an electromagnetic wave damping material, for example, a conductive material. In addition, the fuel cell stack may be electromagnetically shielded by the electromagnetic wave damping material. The fuel cell stack casing may include a plurality of members coupled to each other such that conductive materials contained in the members are electrically connected to each other. An inside surface of the casing may be an insulating surface. A plurality of apertures for ventilation may be formed in a wall of the casing such that the apertures are spaced from each other. The apertures may be covered with a cover.

Abstract: The invention relates to a housing (1) for an electrical operating means such as a light, plug-in device, measuring instrument, switch, distributor, or the like, having at least one first and one second housing part (2,3) that can be assembled with one another in an explosion-proof fashion. Each housing part has one joining surface (4,5); when the housing parts are assembled, said joining surfaces are in contact with one another, forming a penetration-proof gap (6). In order to provide a novel structure of joining surfaces by means of which a corresponding penetration-proof gap is formed independently of the cross-sectional shape of the housing parts and to be able to substantially unite the advantages of both joining surfaces and the housing mentioned above, the joining surfaces run substantially perpendicular relative to the rest of the housing parts and surface profiles (7, 8) are formed in said joining surfaces, the penetration-proof gap being formed between said surface profiles.

Abstract: The invention relates to an air cargo container with an interior space limited by a wall and sealed against the exterior for avoiding an entry of fluid. The wall comprises a first operating configuration wherein said interior space limited by the wall has a first volume VI1. Furthermore, in case of a fire the wall is deformed into a second operating configuration wherein said interior space limited by the wall comprises a second volume VI2 being smaller than the first volume VI1. A check valve blocks fluid from streaming from the exterior into the interior space but opens for a stream from the interior space to the exterior. An actuation means for changing the operating configuration in case of a fire automatically transfers the wall from the first operating configuration into the second operating configuration. During this transfer fluid is pushed from said interior space via the check valve to the exterior.

Abstract: A portable fuel container configured to prevent liquid fuel contained therein from being entirely emptied from the container. The amount of liquid fuel retained in the container can be sufficient to maintain a fuel-to-air ratio in the container at a fuel-rich level that prevents combustion within the container if the container were to be placed near an ignition source or if an ignition source were to somehow enter the container. The container can also include other safety features such as, for example, a flash suppressor located at the fill opening, an extra wide fill opening, and/or an easily controllable dispensing spout. When a flash suppressor is employed, the perforations in the flash suppressor can be configured to retain fuel therein after fuel has been dispensed from the container and the flash suppressor is no longer submerged in fuel.

Abstract: A safety assembly for containers and conduits for combustible fluids comprises a casing that contains an extinguishing substance and is crossed by a thermolabile conduit. The conduit is open to the outside through an outlet hole and is open to the inside of a container or a conduit, through an inlet hole.

Abstract: A storage or transport container for gasoline or similar hydraulic media, which tend to form explosive mixtures of air or gas and vapors. The container includes an electrically conductive plastic. The interior chamber of the container is substantially filled with an explosion-protection filling made of very highly thermally conductive material having a small displacement volume and a large surface.

Abstract: Provided herein is a blast resistant cargo container sufficiently lightweight to be practical for aircraft transport. The container includes a frame assembly and a plurality of panels. Innovative panel connections between side panels and a unique door latching system improve the weakest links of the container. The plurality of panels includes a top panel, a bottom panel, a plurality of side panels and a flexible door. The side panels and the flexible door are formed of at least one explosion resistant sheet of a flexible, high tensile strength material. Edges of the sheets are wrapped around and secured to a rod. An edge capturing rail is wrapped around the sheets over each rod. The latching mechanism involves retaining a locking rail extending from the door panel in a groove of a doorpost or door sill with a detent bar.

Abstract: The invention relates to an element (7) intended to decrease the risk of explosion when handling fuel inside a container (1). The element is adapted to be positioned inside the container and is arranged to suppress a possible combustion of the fuel inside the container. The invention also relates to a use of such an element inside a container to decrease the risk for explosion when handling fuel.

Abstract: The present invention relates to cryogenic fluids. In another aspect, the present invention relates to additional protection of an apparatus containing equipment capable of operating at cryogenic temperatures and containing cryogenic materials. In one embodiment of the present invention, an apparatus includes a primary enclosure defining an internal volume. The primary enclosure includes primary walls, a primary ceiling, a primary floor, and a vapor venting system. The primary enclosure is fabricated from a low temperature alloy. At least of a portion of the primary floor forms a slope to a hydrocarbon outlet. A perforated plate is located on top of the hydrocarbon outlet. The perforated plate is fabricated from a low temperature alloy. A fire retardant agent applied to the exterior surface of the primary enclosure.

Abstract: A barrier system including a plurality of buoyant members, at least some of the plurality of buoyant members having a heat-resistant core, a median layer thrilled on an outer surface of the heat-resistant core, and an antistatic layer formed on an outer surface of the median layer, wherein at least some of the plurality buoyant members are configured for adhering to other buoyant members.

Abstract: A vapor barrier for flammable liquid storage tanks provides a gas impermeable layer for covering the surface of a flammable liquid stored within a conventional flammable liquid storage tank, a tanker, a vessel, or the like. The vapor barrier is formed from a plurality of spherical buoyant members. Each spherical buoyant member has a heat-resistant core or shell, a heat-reactive intumescent or flame retardant layer formed on an outer surface of the heat-resistant core, an antistatic and oil-phobic layer formed on an outer surface of the heat-reactive intumescent layer, and an adhesive layer on an outer surface of the heat-reactive intumescent layer. The vapor barrier may further be used with liquid storage tanks in which separation between the liquid and vapor phases is beneficial to prevent oxidation or other undesirable reactions.

Abstract: A portable fuel container configured to prevent liquid fuel contained therein from being entirely emptied from the container. The amount of liquid fuel retained in the container can be sufficient to maintain a fuel-to-air ratio in the container at a fuel-rich level that prevents combustion within the container if the container were to be placed near an ignition source or if an ignition source were to somehow enter the container. The container can also include other safety features such as, for example, a flash suppressor located at the fill opening, an extra wide fill opening, and/or an easily controllable dispensing spout.

Abstract: A liquid tank cap for a working machine engine is provided. The liquid tank cap opens and closes a filling opening of a tip end portion of a refilling pipe of a liquid tank. The liquid tank cap includes an upper wall that covers the filling opening, a fitting portion that engages with an inner surface of the filling opening and protrudes from the upper wall, and a peripheral wall that covers an outer circumference of the refilling pipe in a state where the liquid tank cap is attached to the filling opening.

Abstract: A case for portable laptop computers and the like including removed batteries to contain and control the bi-products of combustion associated with the unintentional and unexpected combustion of electronic component batteries typically occurring during the thermal runaway of the batteries. The fire containment case controls heat, flame and toxic gases associated therewith. The case has an airtight seal with integrated filters to trap and neutralize the smoke and gas released during combustion. A variety of heat insulation both active and passive can be used along with condition status instruments, and fire suppression can also be provided in core construction and external adaption input suppression inlets.

Abstract: An explosion proof and environment protective oil (gas) refueling equipment includes an oil (gas) storage tank connected with a refueling machine. The inner chamber of the oil (gas) storage tank is filled with an explosion-proof material, which is a multi-layer material unit made of high porosity lamellar materials, with a fixed supporting part being set in this material unit for fixing and supporting the unit, a skid is set under the oil (gas) storage tank and the oil (gas) refueling machine. A plurality of said units is orderly installed in the inner chamber of the oil storage tank, with reasonable installing method and structure.

Abstract: A waste bin and a method for closing a filling hole of a waste bin including a container part, a cover part, and at least one filling hole formed in a side wall of the cover part and/or the container part. A retainer part, which is movable between first and second positions, is arranged between the cover part and the container part of the waste bin. When a temperature of the waste bin is below a predetermined value (T2), the retainer part keeps the cover part in a first position, and a passage via the filling hole to a container space of the container part is kept open. When the temperature has reached the predetermined value (T2), the cover part moves to a second position, and the retainer part moves to the second position, and the passage via the filling hole to the container space is closed.

Abstract: A vapor barrier for flammable liquid storage tanks provides a gas impermeable layer for covering the surface of a flammable liquid stored within a conventional flammable liquid storage tank, a tanker, a vessel, or the like. The vapor barrier is formed from a plurality of spherical buoyant members. Each spherical buoyant member has a heat-resistant core or shell, a heat-reactive intumescent or flame retardant layer formed on an outer surface of the heat-resistant core, an antistatic and oil-phobic layer formed on an outer surface of the heat-reactive intumescent layer, and an adhesive layer on an outer surface of the heat-reactive intumescent layer. The vapor barrier may further be used with liquid storage tanks in which separation between the liquid and vapor phases is beneficial to prevent oxidation or other undesirable reactions.

Abstract: The vapor barrier for flammable liquid storage tanks provides a gas impermeable layer for covering the surface of a flammable liquid stored within a conventional flammable liquid storage tank, a tanker, a vessel or the like. The vapor barrier is formed from a plurality of spherical buoyant members. Each spherical buoyant member has a heat-resistant core or shell, a heat-reactive intumescent or flame retardant layer formed on an outer surface of the heat-resistant core, and an antistatic and oil-phobic layer formed on an outer surface of the heat-reactive intumescent layer. The vapor barrier may further be used with liquid storage tanks in which separation between the liquid and vapor phases is beneficial to prevent oxidation or other undesirable reactions.

Abstract: The present invention relates to cryogenic fluids. In another aspect, the present invention relates to additional protection of an apparatus containing equipment capable of operating at cryogenic temperatures and containing cryogenic materials.

Abstract: A gasoline storage system includes a storage area and a porous, non gasoline reactive, and non-particulate generating material disposed within the storage area.

Abstract: A transport and storage container for liquids, having an inner container, an outer casing and an underframe with a bottom for supporting the inner container, and electrically non-conductive support legs. At least one support leg has a shaped sheet metal part to dissipate an electrostatic charge from the inner container. The end of the shaped part closest to the inner container has a container contact section for conductive connection with the bottom or the outer casing, and a standing contact section for conductive connection with the standing surface. The contact conductor section of the shaped part extends inside a cavity in the support leg and the standing contact section has a ground contact surface and a stack contact surface. These contact surfaces are connected by an offset element in the standing contact section and the stack contact surface is arranged above the ground contact surface in a vertical direction.

Abstract: The invention relates to an air cargo container with an interior space limited by a wall and sealed against the exterior for avoiding an entry of fluid. The wall comprises a first operating configuration wherein said interior space limited by the wall has a first volume VI1. Furthermore, in case of a fire the wall is deformed into a second operating configuration wherein said interior space limited by the wall comprises a second volume VI2 being smaller than the first volume VI1. A check valve blocks fluid from streaming from the exterior into the interior space but opens for a stream from the interior space to the exterior. An actuation means for changing the operating configuration in case of a fire automatically transfers the wall from the first operating configuration into the second operating configuration. During this transfer fluid is pushed from said interior space via the check valve to the exterior.

Abstract: A firing prevention structure of a fuel tank is provided with a double sleeve to pass through a hole formed in a rib, and a supporting structure to support a pipe to pass through the double sleeve. The supporting structure is attached to the rib. The supporting structure is provided with an insulating section which electrically insulates the pipe and the rib. The double sleeve is formed of electrically insulating material. Thus, an ignition source in the fuel tank is prevented.

Abstract: The present invention provides an explosion-proof material which includes a high-porosity sheet (11); With one side(12) of the material as center, the high-porosity sheet (11) is wound into multilayer material body(1) along the direction perpendicular to the side(12); The skeleton(13) is inserted between the multilayer high-porosity sheet (11) of the material body(1); The present invention also provides a processing method for explosion-proof material, including: inserting the skeleton (13) between the high-porosity sheet (11), cutting off the high-porosity sheet (11), and the high-porosity sheet in which the skeleton(13) is inserted is wound into multilayer explosion-proof material. The present invention adopts skeleton to support the body of high-porosity sheet, and thus can effectively prevent the material body from collapse and deformation.

Abstract: An undercut for a blow-molded container is provided and may include a top surface, first and second side surfaces, and first and second end surfaces. The side surfaces are connected to the top surface, and the side surfaces may be substantially flat, substantially parallel with one another, and substantially perpendicular with the top surface. The first end surface is connected to the top surface and the side surfaces, and may be positioned at an obtuse angle relative to the top surface. The second end surface is connected to the top surface and side surfaces. The second end surface may include a tip portion and a concave arc portion. The tip portion may be flat and extend from the top surface at an acute angle. The concave arc portion extends from the tip portion and underlies the top surface to form a hook-shaped fastener for attaching an object to the undercut.

Abstract: An explosion proof and environment protective oil (gas) refueling equipment includes an oil (gas) storage tank connected with a refueling machine. The inner chamber of the oil (gas) storage tank is filled with an explosion-proof material, which is a multi-layer material unit made of high porosity lamellar materials, with a fixed supporting part being set in this material unit for fixing and supporting the unit, a skid is set under the oil (gas) storage tank and the oil (gas) refueling machine. A plurality of said units is orderly installed in the inner chamber of the oil storage tank, with reasonable installing method and structure.