1626 results about "Helium gas" patented technology

A device for generating atmospheric pressure cold plasma inside a hand-held unit discharges cold plasma with simultaneously different rf wavelengths and their harmonics. The device includes an rf tuning network that is powered by a low-voltage power supply connected to a series of high-voltage coils and capacitors. The rf energy signal is transferred to a primary containment chamber and dispersed through an electrode plate network of various sizes and thicknesses to create multiple frequencies. Helium gas is introduced into the first primary containment chamber, where electron separation is initiated. The energized gas flows into a secondary magnetic compression chamber, where a balanced frequency network grid with capacitance creates the final electron separation, which is inverted magnetically and exits through an orifice with a nozzle. The cold plasma thus generated has been shown to be capable of accelerating a healing process in flesh wounds on animal laboratory specimens.

A disc drive includes a base plate and a structural cover removably attached to the base plate to form an internal environment within the disc drive that is filled with a low density gas such as helium. A sealing cover is permanently attached to the base plate and the structural cover to form a hermetic seal for the low density gas. A first seal secured between the base plate and the removable structural cover permits short term operation of the disc drive with minimal leakage of the low density gas so that the drive can be tested prior to permanent attachment of the sealing cover.

A method is described for recovering a noble gas, such as xenon or krypton, from a first gas mixture comprising a plurality of components, one of which is the noble gas and the others are typically helium and / or nitrogen, argon, and relatively light fluorocarbons. The gas mixture is first conveyed to a gas chromatography column for separating the noble gas from the other components of the gas mixture. As the noble gas travels relatively slowly through the column, the other components are exhaust from the column before the relatively slow noble gas. Following the exhaust of these other components, a purge gas is supplied to the column to flush the noble gas therefrom. A second gas mixture comprising the noble gas and the purge gas is conveyed from the column to a membrane separator to separate the second gas mixture into a noble gas-rich gas stream and a purge gas-rich gas stream, which may be recirculated back to the column for re-use.

An air bag inflator providing a source of gas, releasable upon command, to inflate a supplemental inflation restraint (SIR) system commonly known as an automobile air bag. Provided is a pressure vessel containing one or more separate chambers for the purpose of storing gaseous fuel(s) and gaseous oxidizer(s) or liquid fuel(s) and liquid oxidizer(s) under pressure with helium as the primary filler gas. The primary function of the helium gas is to serve as a kinetic damper to modulate and control the reaction rate of the fuel(s) and oxidizer(s). Because of its low mass, high thermal conductivity and high heat capacity for its mass, helium is an excellent filler gas. In the case of the gaseous fuel(s) and oxidizer(s) a single chamber is provided. In the case of liquid fuel(s) and oxidizer(s), two or more separate housings are provided for storing the liquid fuel(s) and oxidizer(s). Along with the liquid fuel(s) and oxidizer(s) housings, two separate chambers containing pressurized helium are provided within the pressure vessel. The first helium chamber rapidly pressurizes upon initiation of a gas producing pyrotechnic igniter. This pressure acts on thin membranes on the first chamber side of the separate liquid storage housings to force the liquid fuel(s) and oxidizer(s) into the second chamber where the materials are atomized and mixed. The mixture is ignited by the arrival of hot gases from the igniter directed into the second chamber via the small diameter tube or orifice. The fuel(s) oxidizer(s) mixture burns to produce gaseous reaction products that are released into the air bag by bursting a controlled rupture burst disc.

An airship has a generally spherical shape and has an internal envelope for containing a lifting gas such as Helium or Hydrogen. The airship has a propulsion and control system that permits it to be flown to a desired loitering location, and to be maintained in that location for a period of time. In one embodiment the airship may achieve neutral buoyancy when the internal envelope is as little as 7% full of lifting gas, and may have a service ceiling of about 60,000 ft. The airship has an equipment module that can include either communications equipment, or monitoring equipment, or both. The airship can be remotely controlled from a ground station. The airship has a solar cell array and electric motors of the propulsion and control system are driven by power obtained from the array. The airship also has an auxiliary power unit that can be used to drive the electric motors. The airship can have a pusher propeller that assists in driving the airship and also moves the point of flow separation of the spherical airship further aft. In one embodiment the airship can be refuelled at altitude to permit extended loitering.

The invention provides systems and methods adaptable to all gaseous agents including Helium to suppress fire in at least one enclosed space. Suppressants are delivered by a dedicated subsystem connected to cargo compartments or to engine nacelles, or by an integrated system connected to cargo compartments and engine nacelles. For example, at least a first reservoir stores fire suppressant composition for knocking down a fire in an enclosed space. Piping delivers the composition from the at least first reservoir to the enclosed space. A pressure sensor senses pressure of the composition in the piping, and a controllable purging device permits air to exit the enclosed space responsive to sensed pressure in the piping of the composition.

A charged glass raw material B is melted in a melting tank 10 by heating with a burner 31 and by heating with electrodes 12, to form molten glass G. Then, the molten glass G flows into a tank additionally provided as a noble gas dissolving tank 20 through a throat 40. The noble gas dissolving tank 20 is provided with a noble gas dissolving device 53, and the noble gas dissolving device 53 is provided with sixteen noble gas inlets 22 for introducing a helium or neon gas supplied to a hearth through heat resistant gas introduction tubes 21 into the noble gas dissolving tank 20. Bubbles of a helium gas A having a purity of 99% are blown out from the noble gas inlets 22 in volumes such that the bubbles have an average diameter of 80 mm or less in the molten glass G.

An electric generating system uses a zeppelin filled with helium or hydrogen, and a spinnaker sail, to provide pulling power that will lift a heavy railcar to an elevated height on a track, such as on a hill or mountainside, or in an elevator-type shaft in a tall building. When the heavy car reaches the top of the track, it is released, and its descent drives an electric generator. The generator can be carried by the car, and can send the power to batteries on the car, or to conductive rails. Alternately, if the car is inert weight, cables can drive stationary generators. The zeppelin will be inflated and deflated repeatedly, using equipment to recapture energy during each gas expansion, to help drive subsequent recompression into high-pressure tanks. The spinnaker sail will use a cable-handling device and spreader bars to deploy the sail and keep it at an elevated height. Various advantages are provided compared to wind turbines and pumped-storage hydroelectric facilities.

In a disk drive device having a double cover structure with low-density gas enclosed therein, embodiments of the present invention help to securely perform leak inspection on an outer cover and to prevent defects caused in joining the outer cover. According to one embodiment, a hard disk drive (HDD) comprises a flow amount adjuster on a base-facing side of its inner cover. Helium gas in an enclosure goes out through a ventilation hole via diffusion channel of a flow amount adjuster. The emitted helium gas remains in the space between the inner cover and an outer cover. This achieves easier detection of the leakage of helium gas from the joining section of the outer cover and prevention of emission of too much helium gas from the enclosure.

The invention provides a condensation heat-transfer experiment device capable of realizing the coupling of natural circulation and forced circulation. The condensation heat-transfer experiment device mainly comprises a steam supply system, an air supply system, a helium gas supply system, a natural circulation cooling system, a forced circulation cooling system, a condensing experiment body and a data measurement and acquisition system. The non-condensable gas containing extra-steam-pipe external condensation heat transfer experiment research under natural circulation and forced circulation cooling conditions and the experiment research on the heat extraction and flow characteristics of a natural circulation system under the conditions that the heating power is stable and changed can be realized. The device can monitor the experiment data in real time and continuously measure the condensation characteristics under different mixed gas compositions, and therefore, the device carries out measurement accurately and carries out data processing rapidly. In addition, the degree of visibility of a whole system is extremely high; and through the observation on experimental phenomena, the understanding on experimental processes and the in-depth study on heat transfer and flow mechanisms are facilitated.

A cold spray apparatus is provided that includes a nozzle having a converging section and a diverging terminal section. A gas supply meters a majority by atomic percent helium gas to the nozzle at an incident gas temperature of less than 30° Celsius and at an incident velocity of between 2 and 6 MPa. A particulate feeder provides ductile material particulate having a mean x-y-z axially averaged linear dimension of between 0.9 and 95 microns to the nozzle. A composition is also provided that includes a substrate and a coating of ductile metal. The coating has a void density of less than 1% by volume, and an average domain size of between 0.9 and 95 microns. The coating has a compressive residual stress.

In a disk drive device having a double cover structure with low-density gas enclosed therein, embodiments of the present invention allow a more reliable leak inspection to be performed on the second cover and to prevent defects caused by joining the secondary cover. An HDD according to an embodiment of the present invention comprises a ventilation path from a ventilation hole on an inner cover to a space between the inner cover and an outer cover. An outer peripheral end of an adhesive layer is apart from a joining section, which is exposed in the space. Helium gas flowing out of the ventilation hole flows to the space via the ventilation path and remains within the space. This enables detection of leakage of the helium gas from the joining section to be performed more easily.

A device for generating atmospheric pressure cold plasma inside a hand-held unit discharges cold plasma with simultaneously different rf wavelengths and their harmonics. The device includes an rf tuning network that is powered by a low-voltage power supply connected to a series of high-voltage coils and capacitors. The rf energy signal is transferred to a primary containment chamber and dispersed through an electrode plate network of various sizes and thicknesses to create multiple frequencies. Helium gas is introduced into the first primary containment chamber, where electron separation is initiated. The energized gas flows into a secondary magnetic compression chamber, where a balanced frequency network grid with capacitance creates the final electron separation, which is inverted magnetically and exits through an orifice with a nozzle. The cold plasma thus generated has been shown to be capable of accelerating a healing process in flesh wounds on animal laboratory specimens.

The invention relates to a method for brazing a compact efficient titanium alloy plate-fin heat exchanger, which adopts an amorphous titanium based brazing filler metal brazing titanium alloy with lower melting point which is between 820 and 840 DEG C, wherein the optimum clearance of the amorphous titanium based brazing filler metal brazing titanium alloy is between 20 and 90 microns, the optimum brazing temperature is between 850 and 900 DEG C, the optimum brazing time is between 10 and 15 minutes, the heating rate before soaking a workpiece is between 10 and 15 DEG C per minute, the heating rate for brazing after the soaking is 15 DEG C per minute, the cooling rate for the brazing filler metal to become solid from liquid is not less than 15 DEG C per minute, and a vacuum system only can be closed when the temperature is below 150 DEG C. Through strict selection and purchase of materials, precise part machining, careful part cleaning, brazing filler metal arrangement according to a process, precise assembling and clamping, and performing brazing according to a stated brazing process, a helium gas leakage test shows that the integral leakage of the product is 9*10<-8>PaM<3> / S which is in accordance with the standard requirement.

The present invention relates to apparatus for filling an empty, flexible container (8) with gas essentially instantaneously when subjected to powerful retardation forces, wherein the gas-filled container (8) functions as a force-absorbing cushion which protects against injuries, wherein the apparatus includes pressure receptacles (1, 2) which is filled with gas under high pressure, a conduit (5) which connects the receptacles (1, 2) with the container (8), means for opening the connection between the receptacles (1, 2) and the flexible container (8) when subjected to retardation forces that exceed a smallest value, a container-holding device (7), and a retardation meter. The vessel is comprised of two pressure receptacles (1, 2) which are each sealed by means of a closure means and each of which has a respective connection conduit (3 and 4) which joins pressure receptacles (1, 2) to the flexible container (8). One pressure receptacle (1) contains oxygen and an inert gas while the other receptacle (2) contains inert gas and hydrogen, wherein the inert gas is helium, argon and / or nitrogen.

Embodiments of the present invention relate to an apparatus and method of annealing substrates in a thermal anneal chamber and / or a plasma anneal chamber before electroless deposition thereover. In one embodiment, annealing in a thermal anneal chamber comprises heating the substrate in a vacuum environment while providing a gas, such as a noble gas, a reducing gas such as hydrogen gas, a non-reducing gas such as nitrogen gas, or combinations thereof. In another embodiment, annealing in a plasma chamber comprises annealing the substrate in a plasma, such as a plasma from an argon gas, helium gas, hydrogen gas, or combinations thereof.

Embodiments of the present invention help to provide a sealed hard disk drive (HDD) with high reliability. According to one embodiment, a HDD is a hermetically sealed HDD. A base has an opening of a through-hole on its bottom; a feedthrough is provided so as to close the opening. A flange of the feedthrough has a larger outline than the opening, and its rim is joined to the base with solder at the solder joint. The solder at the solder joint is mainly composed of Sn and contains 15 atomic percent to 27 atomic percent of indium. This solder reaches the γ phase from −150° C. to 120° C. Accordingly, even if the HDD has been exposed at low temperature for a long time, the solder joint is not broken so that helium gas does not leak.

Disclosed is a method of removing resist preventing increase of dielectric constant of low permittivity insulating films and preventing remains of resist. Using a resist mask, a protection insulating film, a MSQ film, and a silicon oxide film composing an ILD are RIE dry etched sequentially, and a via is formed on the surface of a substrate for processing reaching the diffusion layer on the substrate for processing. Subsequent process consists of; removing a modified layer formed on the substrate for processing surface because of prior etching using plasma gas by plasma excitation of NH3 gas, and another etching for complete removal of the resist mask by irradiation of hydrogen active species created by hydrogen gas and inert gas, of which example is helium gas or argon gas.

Embodiments of the present invention help to prevent leakage of low-density gas during low-density gas injection into a disk drive device and to perform low-density gas injection efficiently. In a hard disk drive (HDD) according to one embodiment of the present invention, an injection hole filter with a valve function is attached to a helium injection hole in order to inject helium gas in an enclosure. The injection hole filter has a valve member configured to operate in an open state or closed state. The open state is a state while the helium gas is being injected and the closed state is a state after the helium gas has been finished to be injected. The valve member is in the open state if the outside pressure is higher than the inside pressure and is in the closed state if the inside pressure is higher than the outside pressure.

A method of processing a substance, such as a food item, utilizing high pressure processing includes providing an enclosed environment including the substance and one or more of the following gases: carbon monoxide, carbon dioxide, nitrogen, nitric oxide, nitrous oxide, hydrogen, oxygen, helium, argon, krypton, xenon and neon. The enclosed environment including the substance and at least one gas is subjected to high pressure processing and sealed in a container. The high pressure processing may occur prior to or after sealing the substance in the container. Control of the amount and type of gases in the enclosed environment including the substance enhances the biocidal efficacy of high pressure processing as well as ensuring desirable sensory qualities of the substance during storage.

A system allowing for the active management of aerostatic lift in buoyant and semi-buoyant aerial vehicles comprised of a high tensile-strength outer pressure cell of a given volume and an inner compression cell of only slightly smaller dimensions. The inner compression cell is filled with a lifting gas, such as helium or hydrogen, to some fractional volume of its maximum, allowing for expansion of the lifting gas at different operational altitudes. When a reduction in aerostatic lift is desired, external air is compressed through the use of air handling means, and introduced into the outer pressure cell through a directional valve that prevents the pressurized air from leaving the pressure cell. When increased aerostatic lift is once again desired, the valve system may release all or a part of the pressurized air in the pressure cell, allowing the lifting gas to expand thereby displacing a greater volume of air and increasing lift.

An MAS probe is disclosed for obtaining a substantial improvement in signal to noise (S / N) in triple-resonance high-resolution (HR) magic-angle-spinning (MAS) NMR of samples near room temperature (RT) in high-field magnets where the magnet's RT shim bore is greater than 60 mm. All critical circuit components, including the sample coils, are located along with the spinner assembly in a thermally insulated cold zone pressurized with helium gas. The spinner assembly attaches to a sealed, curved, rotor-loading tube to permit automatic sample change, and it is surrounded by a partially insulated jacket cooled with a cryogenic fluid, generally nitrogen gas. The MAS probe is also compatible with magic angle gradients, variable temperature operation, field locking, and commonly available closed-cycle cold fingers. One major challenge in implementing CryoMAS is solving the problem of gas leakage from the spinner bearing, drive, and exhaust nitrogen into the cold zone, as some components will necessarily be ceramic, some plastic, and some metal. It is not desirable to use helium for the spinner bearing and drive gases for cost reasons and to prevent risk of degradation of o-ring-sealed magnet cryostats. A pressurized helium atmosphere in the cold zone may be utilized to prevent nitrogen flow from the spinner exhaust streams or atmosphere into the cold zone. The drawback to a pressurized cold zone is that the heat transfer coefficient in dense helium at low temperatures is very high, making it challenging to cool the sample coils and all the large, critical, circuit components in a practical manner. Part of the solution here is to use a first-stage cooling-jacket around the major heat leaks near the spinner exhaust flows. The critical components may be insulated with fine glass wool or teflon foam and conduction cooled without cooling much of the cold zone below the temperature of the first-stage cooling. The use of coaxial sapphire capacitors allows the noise contributions from the most critical capacitors to be reduced to a minor fraction of the total.

An ink-package assembly including an ink package fluid-tightly containing a mass of an ink, and a sealing wrapper fluid-tightly enclosing the ink package, wherein an interior space of the sealing wrapper is charged with an inert gas such as a helium gas, which has a lower degree of solubility in the ink, than the air. The interior space of the sealing wrapper is evacuated to a reduced pressure of −20 kPa and −60 kPa with respect to the atmospheric pressure, as needed. The ink package includes an ink bag and is provided with a spout having a passage, and a cap for closing the passage. Where the sealing wrapper is evacuated, the ink package preferably further includes an ink-bag casing accommodating the ink bag, and a reinforcing structure interposed between the casing and the ink bag, to prevent deformation of the ink bag. Also disclosed is a method of producing the ink-package assembly.

The invention provides a low-temperature displacement chromatography hydrogen isotope separation device and a method. The invention makes the mixed gas of hydrogen isotope gas and helium after being cooled sequentially pass through a cooled main separation column and a cooled product gas collecting column which are filled with granulate palladium-loaded aluminum trioxide (Al2O3 / Pd) to obtain the product gas rich in heavy isotope components of deuterium and tritium; a hot helium flow passes through and heats the main separation column so as to make the released gas sequentially pass through the cooled secondary separation column and the product gas collecting column which are filled with granulate palladium-loaded aluminum trioxide (Al2O3 / Pd) to obtain the product gas rich in heavy isotopecomponents of deuterium and tritium; after the product gas is collected, middle rich gas flowing out from the secondary separation column is directly fed back into a raw material gas tank; and after the middle rich gas feedback process is accomplished, the main separation column and the secondary separation column are heated, and the gas released by heating is collected via a tail gas collecting column. The separation device has simple structure, reasonable separation process, and low cost for the construction and operation of the device. The invention has higher separation factor for hydrogen isotope separation.

Systems and methods for discriminating between various gases, e.g., argon and helium, for enhanced safety of medical devices are provided. The present disclosure may take the form of a dedicated-use embodiment where a specific gas, helium for example, is expected, and an enabling or “Go” signal is issued when that gas is detected, or an inhibitory or “No-Go” signal when a gas is present that is not identified as helium. Alternately, a control line or input command can be used to select between helium and argon as the expected gas and then issue the appropriate “Go / No-Go” signal, depending on which gas is identified.

Disclosed is a method of removing resist preventing increase of dielectric constant of low permittivity insulating films and preventing remains of resist. Using a resist mask, a protection insulating film, a MSQ film, and a silicon oxide film composing an ILD are RIE dry etched sequentially, and a via is formed on the surface of a substrate for processing reaching the diffusion layer on the substrate for processing. Subsequent process consists of; removing a modified layer formed on the substrate for processing surface because of prior etching using plasma gas by plasma excitation of NH3 gas, and another etching for complete removal of the resist mask by irradiation of hydrogen active species created by hydrogen gas and inert gas, of which example is helium gas or argon gas.

A developing process of the photo-resist coated on the wafer is performed, cleaning the developing solution by a cleaning solution then transferring the wafer to the electron beam radiation unit before the rinsing solution and the resist dries out. The radiation chamber is replaced with a helium gas to form a predetermined degree of vacuum or atmospheric pressure. An electron beam is radiated and the front face of the wafer is heated for a predetermined period of time. In this method, deformation and breaking of a pattern caused by drying after the development can be prevented.

The invention discloses a de-acidifying method for paper cultural relics, which comprises the following steps of: 1) flatly spreading acidified paper cultural relics on a flat board; 2) injecting an ion source reagent including OH- and Ca<2+> into a bubbler, and importing a mixed gas of helium gas and nitrogen to serve as a carrier gas, and transmitting the ion source reagent to a plasma spray gun; 3) turning on a plasma excitation pulse power source, forming ion flames containing OH- and Ca<2+> at the muzzle of the plasma spray gun; and spraying the ion flames to scan the surface of the flattened paper cultural relics to perform deacidifying processing. In the method disclosed by the invention, a plasma discharging form is adopted under normal temperature and normal pressure work conditions, thereby complex and expensive vacuum equipment are avoided being used, and damages of an aqueous solution infusion method to a paper body are avoided; and the method disclosed by the invention can be used for realizing rapid large-area deacidifying processing and has the advantages of uniformity for de-acidification, stable process, and suitability for industrialized large-scale production.