Abstract: A housing for a battery includes an envelope and at least one rupture device provided with a rupture cap. The rupture device is mounted at the location of an opening formed in the envelope. The rupture cap breaks when an excess pressure is exerted on its outer surface situated on the outer side of the housing.

Abstract: A downhole apparatus comprises a casing string with a degradable plug therein to block flow therethrough. A flow barrier is positioned in the casing below the degradable plug and the degradable plug and the flow barrier defining a buoyancy chamber therebetween. An annular fluid reservoir holds a degrading fluid. The fluid reservoir has first and second rupture disks at upper and lower ends. Fluid from the annular fluid reservoir is communicated to the degradable plug after the first and second rupture disks rupture.

Abstract: A buoyancy assist tool has an outer case and a rupture disk connected in the outer case. A sleeve is disposed in the outer case and movable from first to second position in the outer case. A rupture disk membrane of a rupture disk prevents the sleeve from moving to the second position prior to the rupture disk membrane rupturing. The outer case is configured to be connected in a well casing. A lock ring holds the sleeve in the first position.

Abstract: A one-time-use pressure-actuated conduit closure is provided, to selectively withstand fluid pressure from one side of the device until the closure is removed remotely, the closure device being a frangible dome designed to withstand fluid pressures from one side but to rupture upon application of higher pressure on its other side, which provides a mechanism to isolate downhole fluid under (high) pressures in part of a well during operations for a period of time selected by an operator, and then to remove the isolation by breaking the rupture dome remotely by application of extra fluid pressure or other forces from surface. The frangible dome has features in at least one surface to guide and control its breakage to provide controlled shard sizes and shapes and a predictable opening for minimal obstruction of the conduit when broken away.

Abstract: A rupture disc device and method of assembly thereof are provided. The rupture disc device has a device body formed so that there are no leakage pathways to the radially outer surface thereof. The rupture disc is welded to the device body so that the weld joint therebetween is not relied upon to provide structural support, and instead strictly acts as a seal. In one form, the weld joint is formed with the weld beam directed axially transverse to thickness of the rupture disc to minimize unwanted variances in the rupture disc burst pressure that otherwise may be created due to the heat generated during weld joint formation.

Abstract: The invention relates to an activation device for an electric battery unit, in particular, for a battery part of a torpedo. The invention also relates to a battery unit with activation devices of this type. An activation device incorporates an operating supply connection, to which an operating supply reservoir can be connected. A movably arranged cutting element can be pneumatically actuated via a pneumatic connection of the activation device by means of an actuation element, wherein a sealing element arranged in the path of travel of the cutting element controls the operating supply connection. In order to guarantee a safe storage, ready for operation, and a safe activation of a battery unit, it is provided in accordance with the invention that the activation device incorporates a pneumatic outlet, which can be fluidically connected to the pneumatic connection, depending on the position of the actuation element.

Abstract: A rupture disc assembly and a float tool incorporating the rupture disc assembly is disclosed. The rupture disc assembly may include a rupture disc assembly comprising a rupture disc, an upper tubular portion and a lower tubular portion, and a securing mechanism for holding the rupture disc between the upper and lower tubular portions. A float tool for creating a buoyant chamber in a casing string may include the rupture disc assembly and a sealing device for sealing the lower end of the casing string, the buoyant, sealed chamber may be created there between. In operation, applied fluid pressure causes the rupture disc to move downward. The rupture disc may be shattered by contact with a surface on the lower tubular portion. Full casing internal diameter may be restored in the region where the rupture disc formerly sealed the casing.

Abstract: A metal obturating element is capable of being resistance-welded to the outer side of an edge of a hole of a metal wall of a pressurized gas reservoir of a gas generator, including on a first side, a portion dimensioned for covering the hole and having an end intended to be inserted into the hole, and a portion for connecting the portion to the peripheral edge, having a surface tilted rearwards relatively to the end and around the portion, this surface intended to be welded to the outer side of the edge of the hole. The element is formed with a deep-drawn part. The tilted surface forms around the central portion an angle greater than or equal to 50° and less than or equal to 80° relatively to the axis. The part includes in a second side located opposite to the first side another surface tilted rearwards relatively to the end and this by at least one angle greater than or equal to 10° and less than or equal to 80° relatively to the axis.

Abstract: The invention relates to a bursting diaphragm (14) for an inflator (10) comprising at least one predetermined breaking contour (24) destroyable upon activation of the inflator (10), wherein a shock wave can be generated. In accordance with the invention, the predetermined breaking contour (24) includes a through hole (25) on at least one end point (27), especially on all end points (27).

Abstract: The invention relates to a container (1) for a fluid for metering a reagent into a microfluidic system. The container comprises a chamber (4) and a first film (3) which seals off the chamber (4) so that the fluid is encapsulated in the chamber. Advantageously, the first film (3) is an aluminum sealing film. A second film (7) is sealingly arranged on the first film, for example by adhesive bonding of the film layers. The films differ in their tear strength such that when pressure is applied simultaneously to both films the first film tears while the second film deforms elastically and/or plastically. By tearing the first film a connection is produced between the container chamber and an inlet channel so that a fluid contained in the chamber flows into the microfluidic system.

Abstract: A tempered connecting piece is provided for transporting a viscous fluid, and includes an excess pressure release component, which separates the inside of the connecting piece from a discharge line and is fixed to an outer edge on the discharge line. The excess pressure release component is designed to release the discharge line in the event of predetermined excess pressure and a mixing element, which thoroughly mixes a fluid flow in the region of the excess pressure release component, is arranged in the inside of the connecting piece.

Abstract: A two-stroke crosshead large Diesel engine, comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber. The combustion chamber on its outer wall presents a predetermined breaking point, which is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine. The predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions.

Abstract: The present invention is directed to pressure relief devices and to corresponding pressure relief assemblies that have improved vacuum resistance, improved fragmentation resistance, and/or improved burst control while maintaining low mass. The pressure relief device includes a substantially flat flange section and a domed section. The domed section may include a transitional line that defines a change in the shape of the domed section. The pressure relief device may also include a bracket for securing or aligning a domed section to a flange section. The pressure relief device may further include a stress distribution feature that is disposed transversely to a line of weakness in the domed section. The pressure relief assembly may include a fastener having a wire that is configured to break and release the pressure relief device when subject to a predetermined tensile load.

Abstract: A hinge assembly for a rupture disk is disclosed. More particularly, a hinge assembly is disclosed having a first hinge member with a flange body and a collapsible hinge, and a second hinge member with a platform hinge, wherein the collapsible hinge is configured to be positioned between the platform hinge and a rupture disk. A rupture disk hinge is also disclosed, having a flange body and a collapsible hinge extending from the flange body. The collapsible hinge may have an approach extending from the flange body, a platform extending from the approach, and a lip extending from the platform. A rupture disk hinge also is disclosed having a hinge extension that extends along a diameter of a flange body across a central fluid flow path.

Abstract: A rupture disk is provided for relieving pressure between the interior of a battery box and the exterior of the battery box, the box having an outlet opening. A first layer provides a gasket which abuts the battery box, the gasket having a central opening which aligns with the battery box opening. A second layer is in the form of a reverse buckling disk having a disk flange, a domed portion and a weakened portion on the dome that defines a disk burst pressure, the second layer having concave and convex sides. A third layer that is an outlet ring that sandwiches the second layer in between the first and the third layer layers, the outlet ring having a central opening surrounded by an edge. A plurality of teeth on the third layer extend from said edge inwardly. A plurality of tabs are provided on the first and third layers.

Abstract: The present invention is directed to pressure relief devices and to corresponding pressure relief assemblies that have improved vacuum resistance, improved fragmentation resistance, and/or improved burst control while maintaining low mass. The pressure relief device includes a substantially flat flange section and a domed section. The domed section may include a transitional line that defines a change in the shape of the domed section. The pressure relief device may also include a bracket for securing or aligning a domed section to a flange section. The pressure relief device may further include a stress distribution feature that is disposed transversely to a line of weakness in the domed section. The pressure relief assembly may include a fastener having a wire that is configured to break and release the pressure relief device when subject to a predetermined tensile load.

Abstract: A pressure relief bursting disc has a flange portion, a sloping portion interior of the flange portion and a dished portion interior of the sloping portion. The sloping portion has its wider end joined to the flange portion and slopes up from the flange portion in a first direction and is joined at its narrower end directly to the dished portion. The dished portion has its concave side facing in the first direction. In use pressure is applied to the concave side of the dished portion. The disc has a line of weakness, in the sloping portion. This shape achieves reliability of the burst strength, because the sloping portion buckles at the burst strength.

Abstract: An apertured rupture disc support member (32, 90) is provided for use in a rupture disc assembly (70). A rupture disc (30, 30a) comprising one or more embossed segments (80) that are complemental with the support member apertures (56) is also disclosed. The pressure relief assembly (12) is particularly suited for use in sanitary pressure relief applications.

Abstract: The present invention is directed to pressure relief devices and to corresponding pressure relief assemblies that have improved vacuum resistance, improved fragmentation resistance, and/or improved burst control while maintaining low mass. The pressure relief device includes a substantially flat flange section and a domed section. The domed section may include a transitional line that defines a change in the shape of the domed section. The pressure relief device may also include a bracket for securing or aligning a domed section to a flange section. The pressure relief device may further include a stress distribution feature that is disposed transversely to a line of weakness in the domed section. The pressure relief assembly may include a fastener having a wire that is configured to break and release the pressure relief device when subject to a predetermined tensile load.

Abstract: A tear out test plug for plumbing installations includes a cylindrical body having a peripheral sidewall, a closed end and an open end. A positioning flange extends outwardly from the peripheral sidewall at the open end. An end wall closes the closed end. A frangible strip extends from the open end, down the peripheral sidewall, and across at least a portion of the end wall.

Abstract: A tear out test plug for plumbing installations includes a cylindrical body having a peripheral sidewall, a closed end and an open end. A positioning flange extends outwardly from the peripheral sidewall at the open end. An end wall closes the closed end. A frangible strip extends from the open end, down the peripheral sidewall, and across at least a portion of the end wall.

Abstract: A method for manufacturing a bursting disk from a sheet or foil is disclosed. The bursting disk has an edge for clamping the bursting disk in a clamping device and a middle region enclosed by the edge, with the following manufacturing steps: the sheet or foil is clamped with a first portion forming the future edge of the bursting disk, said first portion defining a second portion which corresponds to the future middle region of the bursting disk. A third region is defined, which is located within the second portion of the sheet or foil, a part of the second portion enclosing the third portion of the sheet or foil is clamped completely by means of a pair of clamping jaws or female dies, the sheet or foil is deformed for a first time in the third portion, the third portion being located within the second portion, which remains undeformed.

Abstract: The bursting disc assembly has a primary bursting disc (10) and a secondary bursting disc (20) immediately behind and supporting the primary bursting disc. Each of the said discs (10,20) is made of metal and is gas impermeable, and the bursting strength of the assembly is derived from both of the bursting discs acting in combination. The primary and secondary bursting discs are in contact over the whole of the operating area of the disc, and are shaped together as a pair The materials of the two discs can be chosen suitably for their functions. The primary disc is for example corrosion-resistant.

Abstract: A pressure relief device is provided. The pressure relief device includes a sealing member and a low-pressure support member that is adapted to provide support to the sealing member when the sealing member is subject to a certain pressure differential. The low pressure support member includes an annular flange and at least one supporting projection. A cutting element is adapted to puncture the sealing member when the sealing member is subject to a predetermined pressure differential. The pressure relief device may further include a high pressure support member and safety heads forming a pre-torqued assembly. The supporting projection may optionally include an area of weakness either wholly within or on the periphery thereof.

Abstract: Systems, methods, and apparatus for use in an airbag inflation system are disclosed. An explosively formable projectile piece is positioned adjacent to an opening and, upon deployment of an initiator, is forced through the opening, thereby changing the shape of the projectile piece. The projectile piece is projected towards a rupturable wall. Once the projectile piece has ruptured the wall, the airbag inflation gas can pass through the opening in the wall and inflate the airbag.

Abstract: The present invention relates to a bursting insert for installation in a pipeline system for transporting a fluid showing a spontaneous exothermic reaction. The bursting insert comprises a wall which surrounds—at least in part on the outside—a passage volume having the fluid flowing therethrough in a passage direction. A pressure discharge line which is sealed relative to the passage volume with a bursting body extends out of the passage volume. When a predetermined bursting pressure is exceeded, the bursting body can be transferred into a state in which the passage volume and the pressure discharge line are interconnected in fluid-conducting fashion. For an easy mounting of the bursting body, the bursting insert can be designed as a pipeline module which can be installed and dismounted repeatedly in the pipeline system for replacing the bursting body.

Abstract: The present invention provides a compressed gas cylinder that is capable of storing a compressed fluid at high pressures. The cylinder of the present invention includes a body terminating in an inwardly domed cap. The dome included in the cap of the compressed gas cylinder of the present invention is formed such that the material near the tip of the dome is relatively thinner than the material near the base of the dome. The tip of the dome, therefore, creates a pierce region in the cap that can be pierced through the application of a relatively low pressure.

Abstract: A cell according to the present invention comprises a positive electrode, a negative electrode, an electrolyte solution, and an outer casing, wherein the outer casing comprises a valve plate 30 having a thickness, an annular-shaped break groove 4 formed on the valve plate, and one or more of break aiding grooves 1 in the inner area of the break groove, and wherein the break aiding groove comprises such configurations that remaining thickness of the valve plate at the break aiding groove is thicker than remaining thickness of the valve plate at the break groove, and at least one end of the break aiding groove is connected with the break groove. In a cell provided with a valve plate which is a safety valve 9 comprising the break groove and the break aiding groove, the safety valve operates smoothly and releases a gas inside the cell quickly, and resistance to dropping impact is improved.

Abstract: An inflator for an air bag, which inflates the air bag by a pressurized medium, has a rupturable plate that seals a pressurized portion of an inflator prior to an activation of the inflator. The rupturable plate is attached to the inflator by fixing a peripheral edge portion thereof to the inflator, and has at least one of the following parameters: (a) a ratio of diameter/thickness is 14 to 50, (b) a tensile strength is 880 to 1100 N/mm2, and (c) elongation is 25% or more.

Abstract: A pressure relief device is provided. The pressure relief device includes a sealing member and a low-pressure support member that is adapted to provide support to the sealing member when the sealing member is subject to a certain pressure differential. The low pressure support member includes an annular flange and at least one supporting projection. A cutting element is adapted to puncture the sealing member when the sealing member is subject to a predetermined pressure differential. The pressure relief device may further include a high pressure support member and safety heads forming a pre-torqued assembly. The supporting projection may optionally include an area of weakness either wholly within or on the periphery thereof.

Abstract: A flame front diverter element is designed to cause a minimal pressure drop under normal venting conditions when process vapors need to pass through the explosion protection system and to other equipment connected to the manifold system. In the event of a deflagration, the flame front diverter directs the high-speed pressure wave towards a bi-directional rupturable disc causing the rupturable disc to open thus creating an aspiration effect on the opposite bi-directional rupturable disc.

Abstract: A non-fragmenting pressure relief apparatus includes a rupture disc having a central bulged or flat section and a peripheral flange portion. Certain embodiments of the invention have a butterfly shaped element having two wing panels attached to the underside of a rupture disc of the apparatus. A line of weakness of major length extends around the periphery of the central section of a disc and C-shaped end region lines of weakness in the wing panels, which define a hinge portion of the disc therebetween, first converge and then diverge from one another, and connect with the major line of weakness. Application of an overpressure to the rupture disc apparatus causes the entire line of weakness to sever including the end region lines of weakness whereby divergence of the opening force at the hinge portion of the disc prevents separation of the central section of the disc from the peripheral portion of the disc.

Abstract: The present invention is directed to pressure relief devices and to corresponding pressure relief assemblies that have improved vacuum resistance, improved fragmentation resistance, and/or improved burst control while maintaining low mass. The pressure relief device includes a substantially flat flange section and a domed section. The domed section may include a transitional line that defines a change in the shape of the domed section. The pressure relief device may also include a bracket for securing or aligning a domed section to a flange section. The pressure relief device may further include a stress distribution feature that is disposed transversely to a line of weakness in the domed section. The pressure relief assembly may include a fastener having a wire that is configured to break and release the pressure relief device when subject to a predetermined tensile load.

Abstract: A unitary, forward buckling rupture disc is provided that is adapted to be mounted in a holder in which the disc is in closing relationship to a tubing string in an oil well and has greatest utility for testing the integrity of the connection between the sections of oil well tubing strings. The disc is designed to withstand the fluid pressure head in the string and a leak test pressure, and to then burst and fully open under a predetermined overpressure. The concavo-convex bulged section of the disc has a non-circular, continuous score line formed in the concave face thereof. The score line is of continuously varying depth around its circumference and includes an outwardly projecting cam segment which is of greatest depth that ruptures first and is in direct opposition to a lesser depth score line portion forming a hinge area for the burst region of the disc.

Abstract: A cell safety valve which has a thin valve plate formed on a sheet-shaped sealing plate for sealing the cell such that if the inner pressure of the cell exceeds a predetermined value, the valve plate breaks to release a gas in the cell to the outside, in which the valve plate has a dome-shaped dome portion formed thereon and, at its middle or near it, a break groove formed for facilitating the breaking of the valve. By this construction, it is possible to prevent the electrolyte from leaking while reducing the cell-to-cell difference in the operating pressure of the safety valve and ensuring a sufficient open area at the time of the operations of the safety valve.

Abstract: An improved rupture disk assembly and methods and apparatuses for forming a rupture disk are disclosed. The rupture disk assembly includes a rupture disk having a flange connected to a dome-shaped rupturable portion by a transition area. The rupturable portion includes a structural apex formation at or near the apex of the dome and is configured to rupture when exposed to a fluid having a predetermined pressure. Preferably, a safety member is disposed adjacent the rupture disk. The safety member includes a hinge about which the disk bends when the disk ruptures. The present invention is also directed to an apparatus and method for consistently, accurately, and repeatably forming a structural apex formation in a rupture disk before the formation of the rupture disk dome, during the formation of the rupture disk dome, and after the formation of the rupture disk dome.

Abstract: The present invention relates to a pressure relief device and method of using the same. The pressure relief device includes a rupture element containing an inner layer made of an nonferrous-based composition that can preferably withstand contact with corrosive fluids. The inner layer of the rupture element is preferably the only part of the rupture element that is exposed to fluid in the system where it is installed. The pressure relief device may be installed in any system where overpressurization or underpressurization protection is desired. For example, the pressure relief device may be installed in systems where corrosive fluids are used and where an ultraclean environment is needed.

Abstract: An improved rupture disk assembly and methods and apparatuses for forming a rupture disk are disclosed. The rupture disk assembly includes a rupture disk having a flange connected to a dome-shaped rupturable portion by a transition area. The rupturable portion includes a structural apex formation at or near the apex of the dome and is configured to rupture when exposed to a fluid having a predetermined pressure. Preferably, a safety member is disposed adjacent the rupture disk. The safety member includes a hinge about which the disk bends when the disk ruptures. The present invention is also directed to an apparatus and method for consistently, accurately, and repeatably forming a structural apex formation in a rupture disk before the formation of the rupture disk dome, during the formation of the rupture disk dome, and after the formation of the rupture disk dome.