Abstract: A burst disk including a body, and a stress riser unexposed to fluidic environment outside of the body.

Abstract: This disclosure relates to a rupture disk (400), which may include a flange portion (401), a reverse-buckling dome portion (403), and a transition portion (402) joining the flange portion to the reverse-buckling dome portion. The dome portion may define an apex. The dome portion may further define an indentation (404) at the apex and/or a line of weakness (405), which may be proximate to the transition portion and/or may include a relatively weak segment configured to initiate rupture. An integral stress concentrating feature may be provided. A line of weakness and/or a base of a domed portion may be non-circular. The disclosure also relates to a rupture disk crimped into a holder (410). The disclosure also relates to a container having a wall that defines a rupturable portion.

Abstract: The present invention is directed to use of a combined seal involving a compression seal coupled with a metal-to-metal seal for use on the suction and discharge side of the plunger portion of a reciprocating pump. This combined seal results in less vibratory movement and better pumping during use of the pump, and an overall more efficient pump based on the improved seal.

Abstract: A set of pressure activated tools that could be used in a well bore to allow for hydraulic fracturing completions are provided. Methods, apparatuses and assemblies are described herein for perforating (also known as hydraulically fracturing or stimulating) subterranean formations. In some embodiments, an insert is provided having a body for sealing engagement with a port in a tubular member. The insert body can include a fold-over ledge and a membrane having a first mode wherein the membrane prevents fluid passage through the body and a second mode wherein the membrane partially disengages from the body upon treatment fluid reaching a threshold pressure and folds over the fold-over ledge in a bottle-cap opening manner to contribute to the fracture of the formation by the pressurized treatment fluid exiting the port.

Abstract: Disclosed herein is an improved fluid end discharge cap and bore to minimize or avoid cavitation during use of a reciprocating fluid end pump and hence prolong the use and life of the fluid end assembly. The improved design included modifying the current cylindrical discharge cover or cap to a tapered, conical or convex design, enlarging the discharge bore, and recessing seat decks into the suction and discharge bores, to avoid fluid flow obstructions and increase volume flow. The pump outlet bore was enlarged and the bore height and diameter were increased to further increase flow. The conventional design has edges and ninety-degree angles which tended to allow for fluid media to remain in the bore and trigger pump cavitation. The current inventive design has eliminated restrictions, in particular 90° angles, to allow uninterrupted fluid flow therein.

Abstract: A set of pressure activated tools that could be used in a well bore to allow for hydraulic fracturing completions are provided. Methods, apparatuses and assemblies are described herein for perforating (also known as hydraulically fracturing or stimulating) subterranean formations. In some embodiments, an insert is provided having a body for sealing engagement with a port in a tubular member. The insert body can include a fold-over ledge and a membrane having a first mode wherein the membrane prevents fluid passage through the body and a second mode wherein the membrane partially disengages from the body upon treatment fluid reaching a threshold pressure and folds over the fold-over ledge in a bottle-cap opening manner to contribute to the fracture of the formation by the pressurized treatment fluid exiting the port.

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. The apparatus includes a first layer that 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 distance.

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: An overpressure indicating disk apparatus for indicating an overpressure condition in a pressurized system includes a body having end portions, a bore, and a reverse buckling disk having an annular peripheral portion and a concave convex dome portion. The annular portion surrounds the dome. The first end portion is attached and in pressure communication to the pressurized system. The pressure in the bore is the same pressure as the pressure of the pressurized system. The annular peripheral portion is mounted to the body. An indicating component/ring is affixed to the body and disk. A central tab is mounted inside the ring. The concave side faces the central tab. The convex side faces the pressure inside the bore. When the pressure in the bore exceeds a preselected maximum pressure value, the disk reverses to engage and displace the central tab thereby indicating visually that an overpressure condition exists within the bore.

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: A rupture disc for use in a pressure relief system includes a dome having a concave and a convex side and a circumferential flange associated therewith. At least one control score is formed or otherwise produced in the dome at a radial position between an apex of the dome and an outer circumference of the dome. At least one of a depth, a width, a length and the radial portion of the at least one control score is selectively controlled so that the depth, width, length, and/or radial position of the at least one control score controls the pressure at which the dome will start to collapse.

Abstract: A rupture disk is provided for relieving pressure between the interior and exterior of a battery box, the box having an outlet opening. The apparatus includes a first layer that 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 is an outlet ring that sandwiches the second layer in between the first and the third 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 distance. A plurality of tabs are provided on the first and third layers.

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: An overpressure indicating disk apparatus for indicating an over pressure condition in a pressurized system includes a body having first and second end portions and a bore, the first end portion configured for attachment to the pressurized system and in pressure communication therewith so that the pressure in the bore is the same pressure as the pressure of the pressurized system. A reverse buckling disk having an annular peripheral portion and a concave convex dome portion is provided. The annular peripheral portion surrounds the dome. The disk annular peripheral portion is mounted to the body, closing the bore at the first end portion. An indicating component or ring is affixed to the combination of a body and reverse buckling disk. The indicating ring has an annular peripheral portion that aligns generally with the annular peripheral portion of the reverse buckling rupture disk. A movable central tab portion is mounted inside the indicating component or ring.

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: A valve for controlling flow of pressurized fluid from a confined area that is operable to relieve an overpressure condition as well as to allow flow of fluid in response to a pressure relief command. The valve including a valve body with a fluid passage therethrough, a reverse buckling rupture disc in the valve body in normally blocking relationship to the flow of fluid through the passage, and a selectively actuatable device carried by the valve body adjacent the convex surface. The actuatable device is operable to disrupt, without puncturing, the disc so as to initiate reversal and rupture of the disc and to permit flow of the pressurized fluid through the passage.

Abstract: A reverse acting rupture disc is provided having a laser defined electropolished line-of-weakness recess, and an improved method of forming an electropolished line-of-weakness recess in a reverse acting rupture disc that assures full opening of the disc upon reversal. A rupture disc blank is pre-bulged, final bulged, and then provided with a layer of resist material. A laser is used to remove at least a portion of the layer of resist material corresponding to a desired line-of-weakness recess in the concave face of the bulged rupture disc. The disc is then subjected to an electropolishing operation to remove metal from the lased area of the rupture disc, thereby forming a lustrous polished line-of-weakness recess in the disc of desired configuration and of a predetermined depth that is related to material thickness.

Abstract: A safety pressure relief device comprises an annular flange portion (22), a concave/convex dome portion (24) and a transition portion (26) between the flange portion (22) and the dome portion (24), the transition portion (26) comprising a linear extent (28) extending from the annular flange portion (22) at a first acute angle (?1) to the plane of the flange portion (22), a tangent to the dome portion (24) at its junction with the transition portion (26) making a second acute angle (?2) with the plane of the flange portion (22) which is greater than said first angle (?1), a line of weakness being formed in and around part at least of the linear extent (28) of the transition portion (26).

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 support ring adapted to support a rupturable rupture disc member in a rupture disc assembly. The support ring includes an upper surface, a lower surface, a central aperture defined by an inner peripheral edge and at least one tear-initiating projection, and having a cutting means extending inwardly from the inner peripheral edge and below the upper surface and adapted to cut the rupture disc member. The cutting means includes a plurality a curved cutting portions, each of the plurality of curved cutting portions including an inner arc section extending closer to the inner peripheral edge than other portions of the curved cutting portion.

Abstract: A thermoformed reverse buckling polymer rupture disk having an unsupported raised center portion including score lines cut in the polymer disk that creates a line of weakness to control the buckling pressure of the disk and forms a predetermined burst pattern.

Abstract: A rupture disk which is welded or brazed to a relatively massive or robust ring member integrally attached to the remainder of the body by an isolating member of reduced cross-sectional thickness. The upper part of the tubular body is attached by welding or brazing to the lower half of the body at a flange which extends outwardly from the mounting member. This eliminates the need for compressive forces to effect a seal, and one or two sources of potential leakage and setpoint shift (assembly force) are thereby eliminated.

Abstract: In combination with a rupture disc assembly, there is provided an improvement by using a support ring having a projection and a continuous, generally clover leaf pattern cutting edge.

Abstract: The present invention provides an improved rupture disk apparatus and manufacturing method. The apparatus includes a rupture disk having at least one area of weakness formed by the displacement of material through a partial shearing motion. The weakened area is capable of withstanding pressure cycling because the rupture disk flange acts to support the weakened area during use. The apparatus further includes a safety member adjacent to the rupture disk on the outlet side to ensure opening, the safety member having at least one rupture-initiating, stress-concentrating point positioned to contact the rupture disk weakened area.

Abstract: An improved rupture disk assembly for a pressure relief system is disclosed. The rupture disk assembly is sealed between an inlet support member and an outlet support member, each of which define a central fluid pathway. A rupture disk that includes a flange connected to a dome-shaped rupturable portion by a transition area is sealed between the support members. The rupturable portion may include an indentation positioned at the apex of the dome and a score line having a first and a second end. A safety member that has a hinge including a knuckle and a tongue is positioned between the rupture disk and the outlet support member. The knuckle extends downwardly into the dome and extends laterally across the dome to a point that is inside the area circumscribed by the score line or inside the area circumscribed by an arc connecting the two ends of the score line.