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522results about How to "Reduce gradient" patented technology
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Aortic prosthetic devices
ActiveUS7429269B2Reduced permanent pressure lossReasonable hemodynamic profileStentsHeart valvesSystoleProsthesis
A prosthetic device is provided for treatment of an aortic valve, having a compressed state for transarterial delivery and being expandable to an expanded state for implantation. The device includes an expandable support implantable in the expanded state of the prosthetic device in an aortic annulus, and an inner envelope having an upstream portion that lines the inner surface of the support, and a downstream portion which, when the prosthetic device is in the expanded state, extends into an aorta and defines a diverging conical section having a diameter that gradually increases from an upstream end of the section to a downstream end of the section. The section is configured to produce, during systole, a non-turbulent blood flow into the aorta with pressure recovery at the downstream end of the section. Other embodiments are also described.
Owner:MEDTRONIC VENTOR TECH
Implantable prosthetic devices particularly for transarterial delivery in the treatment of aortic stenosis, and methods of implanting such devices
ActiveUS20060259134A1Reduce the possibilityReduced permanent pressure lossStentsHeart valvesSystoleProsthetic valve
Prosthetic devices as described for use in the treatment of aortic stenosis in the aortic valve of a patient's heart, the prosthetic device having a compressed state for transarterial delivery and being expandable to an expanded state for implantation. The prosthetic device includes an expandable metal base (10) constructed so as to be implantable in the expanded state of the prosthetic device in the aortic annulus of the aortic valve; and an inner envelope lining (11) tune inner surface of the metal base (10). The inner envelope, in the expanded state of the prosthetic device, extends into the aorta and is of a diverging conical configuration, in which its diameter gradually increases from its proximal end within the aortic annulus to its distal end extending into the aorta, such as to produce, during systole, a non-turbulent blood flow into the aorta with pressure recovery at the distal end of the inner envelope. Preferably, the distal end includes a prosthetic valve which is also concurrently implanted, but such a prosthetic valve may be implanted separately in the aorta Also described are preferred methods of implanting such prosthetic devices.
Owner:MEDTRONIC VENTOR TECH
Method for supplying gas with flow rate gradient over substrate
ActiveUS8664627B1Reduce gradientIncrease concentrationMaterial analysis by optical meansPipeline systemsReaction chamberChemistry
A method for supplying gas over a substrate in a reaction chamber wherein a substrate is placed on a pedestal, includes: supplying a first gas from a first side of the reaction chamber to a second side of the reaction chamber opposite to the first side; and adding a second gas to the first gas from sides of the reaction chamber other than the first side of the reaction chamber so that the second gas travels from sides of the substrate other than the first side in a downstream direction.
Owner:ASM IP HLDG BV
High productivity plasma processing chamber
InactiveUS20050229849A1Maximizing allowable timeReduce probabilityElectric discharge tubesSemiconductor/solid-state device manufacturingTemperature controlProduction rate
Embodiments of the present invention are generally directed to apparatus and methods for a plasma-processing chamber requiring less maintenance and downtime and possessing improved reliability over the prior art. In one embodiment, the apparatus includes a substrate support resting on a ceramic shaft, an inner shaft allowing for electrical connections to the substrate support at atmospheric pressure, an aluminum substrate support resting on but not fixed to a ceramic support structure, sapphire rest points swaged into the substrate support, and a heating element inside the substrate support arranged in an Archimedes spiral to reduce warping of the substrate support and to increase its lifetime. Methods include increasing time between in-situ cleans of the chamber by reducing particle generation from chamber surfaces. Reduced particle generation occurs via temperature control of chamber components and pressurization of non-processing regions of the chamber relative to the processing region with a purge gas.
Owner:APPLIED MATERIALS INC
Method and system for free-space imaging display and interface
InactiveUS6857746B2Reduce the pressure gradientReducing boundary layer frictionProjector film strip handlingCamera film strip handlingProjection opticsImage resolution
This invention comprises a method and system for displaying free-space, full color, high-resolution video or still images while simultaneously enabling the user to have real-time direct interaction with the visual images. The system comprises a self-generating means for creating a dynamic, non-solid particle cloud by ejecting atomized condensate present in the surrounding air, in a controlled fashion, into an invisible particle cloud. A projection system consisting of an image generating means and projection optics, projects an image onto the particle cloud. Any physical intrusion, occurring spatially within the image region, is captured by a detection system and the intrusion information is used to enable real-time user interaction in updating the image. This input / output (I / O) interface provides a display and computer link, permitting the user to select, translate and manipulate free-space floating visual information beyond the physical constraints of the device creating the image.
Owner:IO2 TECH
Touch Sensing Catheter
ActiveUS20080294144A1Moderate effectReduce potential temperature gradientStrain gaugeEndoscopesThermal isolationTouch Senses
A touch sensing catheter having a strain sensor assembly that may resolve the magnitude and direction of a force exerted on a distal extremity of the catheter, the strain sensor assembly being substantially insensitive to bulk temperature changes. A deformable structure having a plurality of optical fibers associated therewith that are strained by the imposition of a contact force transferred thereto. The optical fibers cooperate with the deformable structure to effect variable gap interferometers, such as Fabry-Perot resonators, that vary in operative length when a force is exerted on the deformable structure. The strain sensor assembly is rendered insensitive to bulk temperature changes by matching the coefficient of thermal expansion of the deformable body with that of the optical fibers. The strain sensor assembly may also be configured to mitigate the effects of thermal gradients using various thermal isolation techniques.
Owner:ST JUDE MEDICAL INT HLDG SARL
Food preparation
ActiveUS20090236335A1Improve efficiencyIncrease net powerContainer decorationsLevel indicationsEngineeringIngested food
Owner:JOLIET 2010 LTD
Clot retrieval device for removing occlusive clot from a blood vessel
ActiveUS20140371779A1Reduce radial forceMinimize compressionDilatorsExcision instrumentsBiomedical engineeringBlood vessel
Owner:NEURAVI
Wear resistant vapor deposited coating, method of coating deposition and applications therefor
ActiveUS20070284255A1Stable cutting edgeReduce torsion fatiguePigmenting treatmentSurgeryWear resistantShape-memory alloy
A low friction top coat over a multilayer metal / ceramic bondcoat provides a conductive substrate, such as a rotary tool, with wear resistance and corrosion resistance. The top coat further provides low friction and anti-stickiness as well as high compressive stress. The high compressive stress provided by the top coat protects against degradation of the tool due to abrasion and torsional and cyclic fatigue. Substrate temperature is strictly controlled during the coating process to preserve the bulk properties of the substrate and the coating. The described coating process is particularly useful when applied to shape memory alloys.
Owner:G&H TECH LLC
Food preparation
ActiveUS20090236333A1Improve efficiencyIncrease net powerContainer decorationsLevel indicationsEngineeringIngested food
Owner:JOLIET 2010 LTD
Cabinet for computer devices with air distribution device
InactiveUS7074123B2Reduce gradientReduce the amount requiredShow cabinetsLighting and heating apparatusDistribution systemTemperature gradient
A cabinet for housing computer devices with an internal air distribution system is disclosed. The cabinet includes an internal chamber defined by a side wall arrangement having at least a front wall. The cabinet includes a support structure for computer devices, wherein the support structure is positioned within the internal chamber of the cabinet. The air distribution device comprises an elongated duct defining a passageway for air distribution. The duct is positioned within the internal chamber and has a plurality of adjustable air discharge ports that are in fluid communication with the passageway. The air distribution device further includes an inlet fan in fluid communication with the passageway. By precisely directing cool air to a frontal portion of the computer devices, the air distribution device reduces the temperature gradients within the cabinet and the quantity of heat that accumulates in the cabinet during operation of the computer devices.
Owner:POWER OF 4 LLC
Cabinet for computer devices with air distribution device
InactiveUS20050153649A1Reduce temperature gradientReduce gradientShow cabinetsLighting and heating apparatusDistribution systemComputer device
A cabinet for housing computer devices with an internal air distribution system is disclosed. The cabinet includes an internal chamber defined by a side wall arrangement having at least a front wall. The cabinet includes a support structure for computer devices, wherein the support structure is positioned within the internal chamber of the cabinet. The air distribution device comprises an elongated duct defining a passageway for air distribution. The duct is positioned within the internal chamber and has a plurality of adjustable air discharge ports that are in fluid communication with the passageway. The air distribution device further includes an inlet fan in fluid communication with the passageway. By precisely directing cool air to a frontal portion of the computer devices, the air distribution device reduces the temperature gradients within the cabinet and the quantity of heat that accumulates in the cabinet during operation of the computer devices.
Owner:POWER OF 4 LLC
Gas turbine power plant and method of operating the same
InactiveUS7363764B2Improve efficiencyAvoid disadvantagesHydrogenOxygen/ozone/oxide/hydroxideSyngasPartial oxidation
Owner:GENERAL ELECTRIC TECH GMBH
Systems and Methods for Designing And Fabricating Contact-Free Support Structures for Overhang Geometries of Parts in Powder-Bed Metal Additive Manufacturing
ActiveUS20140335313A1Improve heat transfer performanceReduce gradientAdditive manufacturing apparatusLayered productsContact freeMetal powder
Systems and methods are provided for designing and fabricating contact-free support structures for overhang geometries of parts fabricated using electron beam additive manufacturing. One or more layers of un-melted metallic powder are disposed in an elongate gap between an upper horizontal surface of the support structure and a lower surface of the overhang geometry. The powder conducts heat from the overhang geometry to the support structure. The support structure acts as a heat sink to enhance heat transfer and reduce the temperature and severe thermal gradients due to poor thermal conductivity of metallic powders underneath the overhang. Because the support structure is not connected to the part, the support structure can be removed freely without any post-processing step.
Owner:NASA +1
Clot retrieval device for removing occlusive clot from a blood vessel
ActiveUS20150164523A1Prevent distal egressReduce radial forceDilatorsExcision instrumentsDistal portionBlood vessel spasm
Owner:NEURAVI
Connector for a respiratory mask and a respiratory mask
InactiveUS7066178B2Smoothly reducing cross-sectionReduce turbulenceBreathing filtersRespiratory masksRespiratory maskEngineering
A connector includes a mask end for connecting with the interior of a respiratory mask, a supply conduit end, and a gas washout vent passage having an inlet adjacent to, or forming part of, the mask end in fluid communication with the interior of the respiratory mask and an outlet in fluid communication with atmosphere. The vent outlet of the vent passage is disposed on the side of the connector remote from the mask end. A respiratory mask includes a mask shell, a mask inlet for connecting with the outlet of a breathable gas supply conduit, and a gas washout vent passage. A vent outlet is disposed on the side of the mask remote from the mask interior and is adapted to direct the washout gas in a direction substantially parallel to the longitudinal axis of the mask inlet and away from the mask inlet.
Owner:RESMED LTD
Multi-rate fluid flow and variable power deliverty for ablation electrode assemblies used in catheter ablation procedures
ActiveUS20120165812A1Improve abilitiesImproved temperature correlationCatheterMachines/enginesControl systemEngineering
A system for providing irrigation fluid during ablation of tissue includes a catheter, an electrode assembly, at least one thermal sensor adapted to be connected to the catheter, and a control system. The electrode assembly is adapted to be connected to an ablation generator. The thermal sensor is adapted to be operatively connected to an electronic control unit (ECU). The ECU receives as an input temperature measurement data from the thermal sensor; determines a power delivery rate value for the ablation generator responsive to the temperature measurement data; and outputs the power delivery rate value. The control system also delivers irrigation fluid to the irrigated catheter at a first flow rate in a first time period and at a second flow rate in a second time period that is temporally after the first time period. The second flow rate is at least half of the first flow rate.
Owner:ST JUDE MEDICAL ATRIAL FIBRILLATION DIV
Turbine blade platform cooling system
ActiveUS20050058545A1Improve fatigue lifeFacilitate flow of coolantPump componentsRotary propellersLeading edgeTurbine blade
Aspects of the invention relate to a cooling system for a blade platform that can provide cooling to and reduce stress on the platform. Aspects of the invention relate to including one or more channels in the blade platform such that the channels extend from the trailing edge face of the platform toward, but terminate prior to, the leading edge face of the platform. The channels can be generally oval or oblong in conformation. Extending between the hollow shank and the channels can be a plurality of cooling holes. During engine operation, coolant is supplied to the shank of the blade assembly. Because the pressure at the shank is greater than the pressure at the trailing edge of the platform, coolant flow is induced through the cooling holes and into the channels. After flowing through the channels, the coolant can be dumped at the trailing edge.
Owner:SIEMENS ENERGY INC
Plasma reactor electrode
InactiveUS6818096B2Avoid defectsEfficient deliveryElectric discharge tubesSemiconductor/solid-state device manufacturingThermal conductivityPlasma reactor
A plasma reactor electrode, a method of making it, and a plasma reaction chamber employing the inventive electrode, wherein the electrode is configured to provide superior thermal conductivity characteristics. In the inventive electrode, first and second plates are connected by pins. In one embodiment, the pins, and the first and second plates are made of the same material, such as aluminum. The connection of the pins through the first and second plates provides superior thermal conductivity between the first and second plates. A dielectric cover, which may be made of ceramic or quartz, may be added below the lower plate. To form a showerhead assembly, holes are formed in the lower plate, and also in the dielectric cover, in alignment with a plenum chamber, to provide appropriate inlet for process gas into the chamber.
Owner:APPLIED MATERIALS INC
Cooling apparatus, system, and associated method
ActiveUS20060146496A1Readily and effectively transfer heat away from printed circuit boardMinimal amount of spaceCircuit fluid transportIndirect heat exchangersEngineeringPrinted circuit board
A cooling apparatus, system, and method are provided. The cooling apparatus includes at least one printed circuit board having opposed major surfaces, and at least one electrical component or other heat source positioned on one major surface of the printed circuit board. The cooling apparatus also includes a pulsating heat pipe having at least a portion that is positioned to either extend along and proximate to one of the major surfaces or be embedded within the printed circuit board. As such, the pulsating heat pipe is capable of transferring heat from the printed circuit board.
Owner:THE BOEING CO
Nasal cannula with reduced heat loss to reduce rainout
ActiveUS20080121230A1Reduce gradientReducing heat loss and rainoutRespiratorsOther heat production devicesNoseCatheter
A system for delivering a humidified gas to a patient is disclosed. The system includes a supply tube having a first supply tube end and a second supply tube end. The supply tube has a first inner diameter. The system also includes an apparatus for delivering heated and humidified gas to the first end of the supply tube and a single lumen having a first lumen end and a second lumen end. The single lumen has a second inner diameter, smaller than the first diameter. The first lumen end is in fluid flow communication with the second supply tube end. The system also includes a nasal cannula in fluid flow communication with the second lumen end. A method of delivering heated and humidified gas to a patient is also disclosed.
Owner:BRIDGE BANK NAT ASSOC
Method of converting pyrolyzable organic materials to biocarbon
InactiveUS20100300866A1Simple methodWidespread benefit to the efficiency of the method and the biocarbon qualityCombustible gas coke oven heatingCarbon compoundsVolatilesCarbonization
A method of forming a pyrolysed biocarbon from a pyrolyzable organic material is delineated. The method involves the conversion of pyrolyzable organic materials to biocarbon for subsequent use. A carbonization circuit is employed with individual feedstock segments being advanced through the circuit. The method facilitates user manipulation of rate of advancement of the feedstock through the circuit, selective collation of volatiles from pyrolyzing feedstock, selective exposure of predetermined feedstock segments to collated volatiles as well as thermal recovery and redistribution as desired by the user. This results in the capacity for a customizable biocarbon product, the latter being an auxiliary feature of the methodology.
Owner:ALTERNA ENERGY
Noncontact communication apparatus and noncontact communication method
ActiveUS20100328045A1Without errorFast communication speedMultiple-port networksDelay line applicationsElectromagnetic couplingResonance
A noncontact communication apparatus is disclosed which includes: an antenna resonance circuit configured to have a coil for communicating with an opposite party through electromagnetic coupling; a changing block configured to change a Q-factor of the antenna resonance circuit; and a control block configured to control the antenna resonance circuit to transmit and receive data to and from the opposite party at one of a plurality of communication speeds prepared beforehand, the control block further controlling the changing block to reduce the Q-factor the higher the communication speed in use.
Owner:SONY CORP
Electrode materials with high surface conductivity
InactiveUS20040140458A1Simple structureHigh crystallinityElectrode manufacturing processesDouble layer capacitorsSurface conductivityIon exchange
The present invention concerns electrode materials capable of redox reactions by electrons and alkaline ions exchange with an electrolyte. The applications are in the field of primary (batteries) or secondary electrochemical generators, super capacitors and light modulating system of the super capacitor type.
Owner:CENT NAT DE LA RECHERCHE SCI +2
Turbine blade platform cooling system
InactiveUS6945749B2Improve fatigue lifeReduce structural stiffnessPump componentsBlade accessoriesLeading edgeTurbine blade
Aspects of the invention relate to a cooling system for a blade platform that can provide cooling to and reduce stress on the platform. Aspects of the invention relate to including one or more channels in the blade platform such that the channels extend from the trailing edge face of the platform toward, but terminate prior to, the leading edge face of the platform. The channels can be generally oval or oblong in conformation. Extending between the hollow shank and the channels can be a plurality of cooling holes. During engine operation, coolant is supplied to the shank of the blade assembly. Because the pressure at the shank is greater than the pressure at the trailing edge of the platform, coolant flow is induced through the cooling holes and into the channels. After flowing through the channels, the coolant can be dumped at the trailing edge.
Owner:SIEMENS ENERGY INC
Turbine airfoil with outer wall cooling system and inner mid-chord hot gas receiving cavity
A turbine airfoil usable in a turbine engine and having at least one cooling system. The cooling system may be positioned in an outer wall of the turbine airfoil, and the airfoil may include a hot gas receiving cavity positioned in a mid-chord region of the airfoil. The hot gas receiving cavity may have an opening in a tip of the airfoil to enable hot gases to circulate into the hot gas receiving cavity. In at least one embodiment, the cooling system in the outer wall and the hot gas receiving cavity may include a plurality of ribs. Cooling fluids may be passed through the cooling system in the outer wall, and hot combustion gases may be passed into the hot gas receiving cavity to moderate the temperature of the inner portions of the outer wall to reduce the temperature gradient in the outer wall.
Owner:SIEMENS ENERGY INC
Air diffuser apparatus
ActiveUS7645188B1Even air distributionReduce draftDucting arrangementsLighting and heating apparatusDistribution systemMechanical engineering
An air diffuser for distributing air into a room from a supply duct of an air distribution system having: a frame member, wherein the frame member includes an inner surface, and an outer surface; an attachment member, wherein the attachment member is associated with the frame member, and further wherein the attachment member is configured for associating the air diffuser with a supply duct; and a diffusing member, wherein the diffusing member comprises a substantially hemispherical dome having an inner surface, an outer surface, and a plurality of apertures, and wherein the substantially hemispherical dome emanates away from the outer surface of the frame member.
Owner:PEERBOLT MORRIS
Turbine shroud asymmetrical cooling elements
ActiveUS20050111965A1Reduce degreeReducing local pressure gradientPump componentsEngine fuctionsMiddle lineSurface plate
A turbine shroud assembly asymmetrical cooling element such as a shroud segment or a baffle includes an arcuate panel. The panel has a plurality of cooling apertures extending through the panel and an axially extending midline of the panel parallel to an axis of rotation of the arcuate panel. A symmetric portion of the cooling apertures have a symmetrical density of aperture inlets that is symmetric with respect to the axially extending midline. An asymmetric portion of the cooling apertures have an asymmetrical density of aperture inlets that is asymmetric with respect to the axially extending midline. One exemplary cooling element includes a high density area of the cooling apertures in the asymmetric portion having a higher density of aperture inlets than in the symmetric portion. A low density area of the cooling apertures in the asymmetric portion has a lower density of aperture inlets than in the symmetric portion of the cooling apertures.
Owner:GENERAL ELECTRIC CO
Cooling circuits for a gas turbine blade
ActiveUS20050025623A1Extended service lifeMitigate such drawbackPump componentsEngine fuctionsSuction stressEngineering
A gas turbine blade of a turbomachine includes in its central portion a centrally-located first cooling circuit at least a suction side cavity, at least a pressure side cavity, at least a central cavity extending between the suction side cavity and the pressure side cavity, a first air admission opening at a radially bottom end of the suction side cavity, a second air admission opening at a radially bottom end of the pressure side cavity, at least a first passage putting a radially top end of the suction side cavity into communication with a radially top end of the central cavity, at least a second passage putting a radially top end of the pressure side cavity into communication with the radially top end of the central cavity, and outlet orifices opening out both into the central cavity and into the pressure side face of the blade.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A +2
Fluid visualisation and characterisation system and method; a transducer
ActiveUS20130345994A1Reduce sensitivityCanceled outVolume meteringVolume flow measuring devicesSonificationTransducer
A fluid visualization and characterisation system includes a measuring section with a housing defining a fluid flow path for fluid flow. The measuring section includes one or more transducers to emit ultrasonic signals into the fluid flow, and at least one receiver to receive reflections of the ultrasonic signal from reflectors in the fluid flow. The system includes a memory for storing data and a processor operatively connected to the memory. The processor comprises several modules. A velocity estimating module is configured to apply one or more velocity estimation algorithms to received reflections of the ultrasonic signal, or data indicative thereof, to determine a velocity profile of the fluid flow. A deconvolution module is configured to apply a deconvolution algorithm at least to the determined velocity profile to determine a true velocity profile of the fluid flow. A fluid visualization and characterisation module is configured to determine characteristics of the fluid and / or fluid flow in by using the determined velocity profile and / or the true velocity profile.
Owner:SP TECHNICAL RESEARCH INSTITUTE OF SWEDEN +1
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