417 results about "Burst pressure" patented technology

A valved medicament delivery device including a housing having a chamber including coaxially aligned inlet and outlet, a medicament cartridge located within the chamber having a passage therethrough and membranes sealing the passage having a burst pressure of less than 10 atmospheres, a manually actuatable fluid delivery device having an outlet in fluid communication with the chamber and a manually actuated valve located between the outlet of the fluid delivery device and the chamber inlet for delivery of fluid under pressure to the valve. The medicament delivery device of this invention may be utilized to deliver a controlled unit dose of an medicament on demand by first pressurizing a pressure chamber in the pressure delivery device upstream of the valve, then opening the valve to open the membranes and express the medicament through the chamber outlet.

An intravascular catheter that exhibits the combined features of superior flexibility, softness, radiopacity and oval/kink resistance. The catheter includes an elongate shaft having a proximal region, a distal region and a lumen extending therethrough. The proximal region of the shaft includes an inner lubricious polymer layer, a reinforcement layer and an outer layer. The reinforcement layer comprises a braid having one or more metallic members and a plurality of polymer members wherein each polymer member comprises a plurality of monofilaments, preferably formed of LCP. The polymer members of the braid provide improved flexibility and softness in addition to high burst pressure. The metallic member(s) of the braid provide improved radiopacity and oval/kink resistance. The catheter may also include a longitudinal member extending along the reinforcement layer.

Dilatation balloons and catheters including same are provided. The balloons are fabricated of a biaxially orientable material such as a nylon or a polyamide material, and they have an inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilatation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilatation or the like up to a maximum pre-bursting pressure application. The maximum pre-bursting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-bursting sizes.

An inflatable cushioning article is made from a multilayer film having a seal layer, a gas barrier layer, and a tie layer adhering the seal layer to the gas barrier layer. The cushioning article has a plurality of inflatable chambers, with each of the chambers having a plurality of cells connected in series to one another via inflation channels. Although the inflatable article can be made from relatively thin films, the article exhibits a relatively high burst pressure and can be inflated to, for example 3 psi, and withstand conditions such as 140° F. and high altitude, without film delamination, seal failure, or film rupture. Preferably, the tie layer comprises an anhydride modified polyolefin having an anhydride content of at least 150 ppm.

An inflatable cushioning article is made from a multilayer film having a seal layer, a gas barrier layer, and a tie layer adhering the seal layer to the gas barrier layer. The cushioning article has a plurality of inflatable chambers, with each of the chambers having a plurality of cells connected in series to one another via inflation channels. Although the inflatable article can be made from relatively thin films, the article exhibits a relatively high burst pressure and can be inflated to, for example 3 psi, and withstand conditions such as 140° F. and high altitude, without film delamination, seal failure, or film rupture. Preferably, the tie layer comprises an anhydride modified polyolefin having an anhydride content of at least 150 ppm.

Dilatation balloons and catheters including same are provided. The balloons are fabricated of a material such as a nylon or a polyamide material, and they have an inflated, non-distended working profile as well as a stretched inflated profile which is achieved by applying pressure through a dilatation catheter or the like that is in excess of that needed to achieve the inflated, non-distended profile and which is adequate to effect dilatation or the like up to a maximum pre-bursting pressure application. The maximum pre-bursting size of the balloon can be tailored depending upon the needs of the particular balloon within a wide range of possible maximum pre-bursting sizes.

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.

Swage end-connector for high pressure reinforced flexible hose particularly suitable in the petrochemical and drilling industries for hoses. Two connectors are disclosed one for intermediate hose pressure burst ratings up to 12,500 psi and internal diameters up to 3½ inches and higher hose pressure burst ratings up to 18,750 psi and internal diameters up to 4 inches. Both embodiment connectors will withstand the rated burst pressure of the hose to which they are connected and will withstand a pump-off force that exceeds the burst pressure of the hose. That is, the hose will fail before the connector pops off the hose.

A flexible hose comprising a tube, a knit fabric, and a cover. The knit fabric comprises a hybrid yarn which comprises a first yarn of co-para-aramid fibers and a second yarn of meta-aramid fibers. The hose exhibits significantly improved burst pressure and/or improved impulse fatigue resistance.

A heat exchanger tube having enhanced corrosion resistance and improved resistance to high burst pressures. The heat exchanger tube comprises an aluminum alloy that consists essentially of about 0.01-1.5% silicon, up to about 1.2% copper, up to about 2.0% manganese, about 0.01-1.0% iron, about 0.01-5.0% zinc, up to about 0.02% titanium and the balance substantially aluminum and incidental elements and impurities.

A flexible pouch having an integral valve for both packaging a product and serving the product and a method of making the same is provided. The flexible pouch includes a panel having an upper edge, an opposed lower edge, and a side edge extending therebetween the upper and lower edges. The flexible pouch further includes a valve disposed in the panel, wherein the valve is a one-way valve for releasing a gas from the pouch at a predetermined gas release pressure. A frangible seal encloses the valve to isolate the valve from the product contained in the flexible pouch, such that the frangible seal is intact when the pressure within the flexible pouch is less than a predetermined frangible seal pressure, and the frangible seal is broken when the pressure within the flexible pouch is greater than the predetermined frangible seal bursting pressure. The method includes the steps of forming the pouch, and inserting a valve in the panel. The method also includes the steps of enclosing the valve with a frangible seal and sealing the edges of the pouch, leaving an upper edge open. The method still also includes the steps of opening, filling and sealing the filled pouch. The method further includes the steps of increasing the pressure in the pouch until the pressure exceeds the predetermined frangible seal bursting pressure and the frangible seal breaks, to release the gas from the pouch.

A cap assembly for a battery and a battery incorporating the cap assembly. The cap assembly includes a plate that connects the electrodes of the bare cell of the battery. The cap assembly includes a vent member that includes a protrusion that is physically connected to the plate. Excess pressure within the bare cell results in the protrusion disconnecting from the plate thereby interrupting current. The vent further includes two circular notches, an inner notch and an outer notch. The vent further includes a cross notch that extends radially outward so as to intersect and extend beyond both the first and second notches. The notches are configured to release when the pressure within the bare cell exceeds a burst pressure.

The invention discloses a fracturing method for increasing the complexity of a high-temperature stratum artificial crack net and belongs to the technical field of petroleum and natural gas engineeringexploitation. The method comprises the following steps that low-temperature work liquid is injected into a high-temperature stratum, a strong cold-hot stress impacting effect is generated through thehigh-temperature difference between the low-temperature work liquid and the high-temperature stratum, rock around a well is induced to generate micro cracks, then fracturing liquid is injected to enable the micro cracks to continue to expand forwards, finally temporary plugging steering liquid is injected to conduct bridge plugging on the artificial cracks to force the cracks to steer to form multi-branch cracks, and the steps are executed at least once. Through the fracturing method, the multiple artificial cracks can be formed, the seepage area is enlarged, the single-well yield and economic benefits are increased, the bursting pressure can be lowered, the fracturing construction risk caused by high temporary plugging steering pressure in the high-temperature stratum is avoided, and safe construction is ensured. The fracturing method is suitable for the high-temperature strata such as hot dry rock, deep-layer shale gas and deep-layer compact oil gas, can be used for vertical well fracturing construction and can also be applied to fracturing construction of horizontal wells, oblique wells and the like.

A high pressure resistant vibration absorbing hose with a bursting pressure of 5 MPa or higher has a hose body and a joint fitting. The joint fitting is to be attached to a swaged portion of the hose body. The hose body has an inner surface rubber layer, a reinforcing layer of high braid or winding density of 50% or more, and an outer surface rubber layer. The swaged portion is designed to have a larger diameter than the main portion of the hose body and the inner surface rubber layer has a wall thickness equal to or larger than 1.0 mm at a swaged portion in a state before the joint fitting is securely swaged thereto. The reinforcing layer has a braid or winding angle θ of a reinforcing wire member equal to or lower than a neutral angle 54.7° and higher than 48°.

A gas generator, in particular for vehicle occupant restraint systems, is provided with a pressure chamber (10) filled with compressed gas, a pyrotechnic igniter (34) arranged outside the pressure chamber (10), a first membrane (14) provided close to the igniter (34) and closing a first opening (12) of the pressure chamber (10), and a second membrane (18) provided further away from the igniter (34) and closing a second opening (16) of the pressure chamber. The first membrane (14) is configured such that it tears at a higher bursting pressure than the second membrane (18).

A method of attachment for swage end-connector for high pressure reinforced flexible hose particularly suitable in the petrochemical and drilling industries for hoses is disclosed. Two connectors are discussed one for intermediate hose pressure burst ratings up to 12,500 psi and internal diameters up to 3½ inches and higher hose pressure burst ratings up to 18,750 psi and internal diameters up to 4 inches. Both embodiment connectors will withstand the rated burst pressure of the hose to which they are connected and will withstand a pump-off force that exceeds the burst pressure of the hose. That is, the hose will fail before the connector pops off the hose.

The present invention relates to a highly water-permeable hollow fiber membrane type blood purifier which comprises hydrophobic polymer hollow fiber membranes each containing a hydrophilic polymer, wherein the hollow fiber membrane has a hydrophilic polymer content of 25 to 50 mass % and a ratio of hole areas of 8 to 25% at its outer surface, and has a thickness non-uniformity degree of 0.6 or more, a thickness of 10 to 60 μm and a burst pressure of 0.5 to 2 MPa, and which is characterized in that the blood purifier has a water permeability of 150 to 2,000 ml/m²/hr/mmHg, and in that said blood purifier is exposed to radioactive rays on conditions that the oxygen concentration of an ambient atmosphere around the hollow fiber membranes is from 0.001% inclusive to 0.1% inclusive, and that the moisture content of the hollow fiber membrane to its weight is from 0.2 mass % inclusive to 7 mass % inclusive. The present invention also relates to a process for manufacturing the same-blood purifier.

The invention discloses parallel flow tubes used for a heat exchanger and a manufacturing method thereof. A material of the parallel flow tubes comprises the following components in percentage by weight: 0.24 to 0.35 percent of ferrum, 0.05 to 0.12 percent of silicon, 0.005 to 0.05 percent of copper, 1.1 to 1.4 percent of manganese, 0.02 to 0.08 percent of chromium, 0.10 to 0.20 percent of magnesium, 0 to 0.10 percent of zinc, 0.010 to 0.035 percent of titanium and the balance of aluminum. The parallel flow tubes used for the heat exchanger have the characteristics of light weight, and high pressure resistance, durability and system safety. The method related to the invention solves the problems of crack inner rib, poor welding, low bursting pressure of thin wall and the like of the parallel flow tubes for the heat exchanger.