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7426 results about "Small hole" patented technology

Comfort product

InactiveUS20050278863A1Selective heatingStuffed mattressesSpring mattressesEngineeringForced-air
An improved comfort product that uses an airflow through a heat exchanger and into the comfort product to selectively heat or cool an occupant has a support layer contacting and supporting a channel layer. The channel layer has at least one channel with an opening to accept air. The channel layer contacts and supports an engineered distribution layer that has numerous small holes making it air permeable. The engineered distribution layer contacts and supports an air permeable comfort layer that is of such size and shape to support an occupant of the comfort product. The comfort product also has a heat exchanger assembly for supplying heated or cooled air to the opening in the channel. The heat exchanger assembly includes an air intake having an intake fan, an exhaust outlet and a heat exchanger for selectively heating or cooling air flowing through the heat exchanger resulting in selectively heated or cooled supply air and exhaust air. The intake fan forces air through the heat exchanger where some of the air is selectively heated or cooled to be supplied to the comfort product and some air is used as exhaust air (to remove the unwanted heat if the supplied air is cooled or to warm the exhaust side of the heat exchanger if the supply air is warmed.). The selectively heated or cooled supply air then moves through the channels in the channel layer and the exhaust air exits through the exhaust vent. The selectively heated or cooled supply air then moves through the engineered distribution layer where the numerous small holes diffuse the air and then the selectively heated or cooled air then moves through the comfort layer where the air is further diffused and where the selectively heated or cooled air can selectively heat or cool an occupant of the comfort product.
Owner:RIVERPARK INC A IN THE STATE OF INDIANA

Object three-dimensional contour outline measuring set and measuring method

ActiveCN101451826AUniform light intensity at the spectral pointImprove energy utilizationUsing optical meansInformation processingMeasurement device
An object three-dimensional outline measurement device and a measurement method are disclosed, the device is composed of a laser diode, a lens, an aperture diaphragm, a two-dimensional Dammam grating, a cylindrical mirror and an area array CCD camera, a transmission line and a computer, the connection relationship therebetween is as below: a beam emitted by the laser diode passes through the lens, the aperture diaphragm, the two-dimensional Dammam grating, and the cylindrical mirror sequentially to form one-dimensional projection array stripes, which illuminates the surface of an objective to be measured, the area array CCD camera collects the grating projection strips modulated by three-dimensional digital shape on the surface of the measured objective and outputs the strips to the computer via the transmission line, the computer includes an image collecting interface, image collecting software and three-dimensional measurement information reconstruction algorithm software. The invention has, by utilizing the Fourier transform three-dimensional outline measurement structure, the advantages of high energy utilization rate, simple measurement structure, high measurement precision, convenient computer reconstruction information processing and great easiness for operation.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI

Method and device for detecting gases by absorption spectroscopy

A method and device for measuring a concentration of a preselected gas in a gas sample are disclosed. The device comprises a Herriott type multipass cell (10) having a center axle (74) and a housing (80A, 80B) surrounding and spaced from the axle to provide a tubular sample cavity (84). The gas sample is pumped through the sample cavity via apertures (154, 156) provided in opposed ends of the axle. A first mirror (44) and a second mirror (46) are supported at opposed ends of the axle. A light source, e.g. a laser or LED, is provided for emitting a light beam into the sample cavity via an entry aperture (30) in the first mirror, the light beam having a wave length at which the preselected gas strongly absorbs. The beam is reflected between the mirrors for a number of times before exiting the cell via an exit aperture (48) in the second mirror and impinging on a detector (52). The device further comprises a reference detector (32) for monitoring the intensity of the unattenuated light beam and a detector for detecting the intensity of light transmitted through the second mirror after a single pass through the cell. The light source is operatively connected to a heat control assembly having a heat sink and the gas sample is passed said heat sink to augment temperature control of the light source.
Owner:ECOTEC INT HLDG LLC

Three-dimensional rapid prototyping method and device based on pulse small hole droplet injection

The invention relates to a three-dimensional rapid prototyping method and device based on pulse small hole droplet injection and belongs to the technical field of three-dimensional rapid prototyping. The three-dimensional rapid prototyping method is characterized in that a heater is used for heating a crucible until the metals in the crucible are in the molten state, a positive differential pressure value is set between the interior of the crucible and a vacuum chamber, simultaneously a piezoelectric ceramic driver applies certain pulse signals to piezoelectric ceramics to lead the piezoelectric ceramics to drive a transmission bar to generate longitudinal infinitesimal displacement, the infinitesimal displacement acts on the metal melt at the bottom of the crucible, tiny droplets are injected from small holes arranged at the bottom of the crucible, one droplet can be formed at the position of the small holes once the piezoelectric ceramics move for one time, size data of the droplets are timely analyzed through a photograph system, further the optimum parameter is obtained through adjustment; and the droplets fall to a moving three-dimensional motion platform to be deposited, and accordingly needed metal parts are formed through depositing. The three-dimensional rapid prototyping method and device based on pulse small hole droplet injection have the advantages that the pulse small holes inject to generate the metal droplets with uniform and controllable sizes, prototyped products are fine and uniform in microstructure, the prototyping process is strong in controllability, and the formed parts are high in accuracy.
Owner:DALIAN UNIV OF TECH

Test device and method for simulating acid etching crack flow guide capability

The invention relates to a test device and a method for simulating acid etching crack flow guide capability. The test device consists of a liquid storage tank, a diaphragm pump, a pipeline electric heating sleeve, a flow meter, a flat plate clamping device, a pressure return valve, a condensing pipe, a waste liquid tank, a data collection and control panel and the like, wherein the inner side of the clamping device is provided with a temperature sensor and a pressure sensor, both ends of the lamping device are provided with small liquid inlet holes and small liquid outlet holes, the inside of the clamping device is provided with a liquid inlet piston and a liquid outlet piston, a rock core chamber is arranged between the liquid inlet piston and the liquid outlet piston, the clamping device is connected with a pressure machine, and the diaphragm pump, the pipeline electric heating sleeve, the flow meter, the temperature sensor and the pressure sensor are all connected with the data collection and control panel and a computer. The test method comprises the following steps; cutting the rock into rock core samples conforming to the standard flow guide chamber, and sealing and curing the rock core samples; placing the rock core samples into the rock core chamber; adopting a gasket for simulating the crack width; sequentially opening a clear water storage tank and an acid liquid storage tank; starting the computer, and inputting experiment parameters; and calculating the flow guide capability of the acid etching cracks of the rock core samples. The invention can simulate the real conditions of the underground acid etching crack forms, and can meet the requirements of the acid etching crack flow guide capability test under different environment conditions.
Owner:SOUTHWEST PETROLEUM UNIV

Negative pressure-based device and method for manufacturing porous textures by laser sintering and quick molding

The invention relates to a negative pressure-based device and a negative pressure-based method for manufacturing porous textures by laser sintering and quick molding. The device comprises an X-Y workbench, wherein a pair of guide rails is arranged on the workbench, and the guide rails have a powder spreading roller and a power spreading groove which can move reciprocally along the guide rails; the X-Y workbench is provided with a molding tank, and a molding workbench capable of moving vertically is arranged in the molding tank; the molding workbench consists of a screen with holes distributed densely and a carriage, and a negative pressure chamber is formed on the lower surface of the molding workbench; the bottom end of the negative pressure chamber is connected with a screw and a servo motor in turn; an absorption tube is communicated with the negative pressure chamber through an opening; and the other end of the absorption tube is connected with a filter and a vacuum pump in turn. In the invention, based on a negative pressure absorption principle, powder which is not sintered on each layer is removed and recycled through an absorption tube; and through layer-by-layer absorption, the powder which is not sintered and solidified is cleaned completely, while the sintered and solidified powder is continuously stacked and overlaid to form parts, so that the manufacturing of the porous texture with an aperture of less than 1mm is realized through selective laser sintering and quick molding.
Owner:NANJING HONNY 3 DIMENSIONAL TECH

Preparation method and device of semi-solid slurry

The invention discloses a preparation method and a device of semi-solid slurry. Three processes of air current stirring, electromagnetic vibration and addition of heterogeneous nucleating agents are comprehensively utilized by the method. A graphite head with holes is connected with a hollow stirring rod, and a rotating motor drives the stirring rod to rotate through gear transmission and drives the graphite head to rotate; gas passes through a sleeve barrel and reaches the graphite head through the hollow stirring rod, and then, the gas overflows out of small holes, thereby realizing the purposes of blowing and stirring the molten metal in a rotating way; an electromagnetic vibration table can realize electromagnetic vibration on the molten metal in a crucible; the heterogeneous nucleating agents are added into the molten metal to promote further spheroidization and refinement of slurry tissues; after the molten metal is smelted, the graphite head is inserted into the molten metal for blowing and stirring the molten metal in a rotating way; and simultaneously, the molten metal is vibrated, and the heterogeneous nucleating agents are added through a powder feeding pipe, thereby preparing the semi-solid slurry with round and smooth primary grains. The prepared semi-solid slurry has the advantages of purity, no pollution, simple used equipment, easy control of process parameters, short pulping processes, small energy consumption and low cost.
Owner:HUAZHONG UNIV OF SCI & TECH

Renal artery radio frequency ablation catheter as well as manufacturing method and application method thereof

The invention discloses a renal artery radio frequency ablation catheter as well as a manufacturing method and an application method thereof, and aims to solve the technical problem of reducing the blood pressure of a patient with refractory hypertension. The renal artery radio frequency ablation catheter comprises a sheath tube and an ablation catheter loaded in the sheath tube, wherein a small hole is formed on the wall of the distal end of the sheath tube and an ablation electrode of the ablation catheter extends out of the small hole. The manufacturing method provided by the invention involves in the independent manufacturing of the sheath tube and the ablation catheter. The application method provided by the invention comprises the following steps: the sheath tube and the ablation catheter are delivered into a renal artery through a femoral artery, and the ablation electrode is pushed to reach the position of the small hole of the sheath tube and then move out of the sheath tube to ablate the sympathetic nerves in the renal artery. Compared with the prior art, the sheath tube is loaded into the renal artery, and the ablation catheter extends out of the small hole of the sheath tube to ablate the sympathetic nerves on the inner wall of the renal artery one by one so as to destroy the sympathetic nerves dominating the kidney, so as to achieve the purpose of treating refractory hypertension by ablation of the sympathetic nerves in the renal artery.
Owner:APT MEDICAL INC

Sectional type porous ceramic dielectric gas fuel combusting device

The invention relates to a multi-stage multi-aperture ceramic dielectric gas fuel inflamer which includes an inflamer shell, a dust-removing wire netting or a metal brush, an air pipeline, a premixing chamber and a fuel gas pipeline. The invention is mainly characterized in that the inflamer shell is divided into an upper part and a lower part with a multi-aperture plate as a boundary. The inner part of the empty cavity at the upper part of the inflamer shell is sequentially provided with a ceramic multi-aperture dielectric of the large-aperture area which is arranged above a ceramic multi-aperture dielectric of the small-aperture area and the ceramic multi-aperture dielectric of the small-aperture area is arranged on the multi-aperture plate. The dust-removing wire netting or the metal brush is arranged under the multi-aperture plate and in the inflamer shell. The multi-aperture plate is imbedded into the middle of the upper and lower parts of the inflamer shell. The surrounding of the multi-aperture plate extends to the outside of the inflamer shell. The invention has the advantage that the multi-stage multi-aperture ceramic dielectric gas fuel inflamer has a higher thermal value range, thereby both the gas of a low thermal value or bum gas fuel and the gas of a higher thermal value can be burnt. The multi-aperture plate added in the inflamer has played a good role of radiating and can effectively prevent backfire or explosion.
Owner:NORTHEASTERN UNIV
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