365 results about "Diffusion chamber" patented technology

A shower head structure (26) includes a shower head main body (78) of a one-piece structure formed in a generally cup shape and having a bottom wall (78A) provided with a plurality of gas injection holes (30A, 30B) formed therein and a side wall (78B) rising from a peripheral portion of the bottom wall. A plurality of gas diffusion chamber forming plates (82A-82C) are housed in the shower head main body (78). A through-hole is formed in a head mounting frame (76) disposed on a ceiling of a processing vessel (24). An upper portion of the side wall (78B) of the shower head main body (78) is inserted into the through-hole, so that a part of the side wall (78B) is exposed to the exterior of the processing vessel. A cooling mechanism (84) is disposed at the upper end portion of the side wall (78B). Heat transfer between the cooling mechanism (84) and the bottom wall (78A) is enhanced, so that the temperature of the bottom wall (78A) can be controlled at a proper value, thereby preventing any adhesion of an unnecessary film onto the bottom wall (78A).

A catheter is adapted to ablate tissue and provide lesion qualitative information on a real time basis, having an ablation tip section with a generally omni-directional light diffusion chamber with one openings to allow light energy in the chamber to radiate the tissue and return to the chamber. The chamber is irrigated at a positive pressure differential to continuously flush the opening with fluid. The light energy returning to the chamber from the tissue conveys a tissue parameter, including without limitation, lesion formation, depth of penetration of lesion, cross-sectional area of lesion, formation of char during ablation, recognition of char during ablation, recognition of char from non-charred tissue, formation of coagulum around the ablation site, differentiation of coagulated from non-coagulated blood, differentiation of ablated from healthy tissue, tissue proximity, and recognition of steam formation in the tissue for prevention of steam pop.

Sutureless, implantable fluid shunting devices and associated methods for controlling the pressure of fluids within anatomical spaces or cavities of the body. The device generally comprises a tube having a diffusion barrier (e.g., diffusion chamber) formed on a proximal end thereof. Fluid which flows through the tube will collect within the diffusion chamber and will diffuse outwardly therethrough. However, the presence of the diffusion chamber will prevent microbes, cells or other matter from interfering with or backflowing through the tube. Additionally, the tube may be provided with a pressure-openable aperture through which fluid from the tube may flow into the diffusion chamber. Such pressure-openable aperture will remain closed, until the pressure of fluid within the tube exceeds a predetermined maximum pressure P_MAX. In this manner, the pressure-openable aperture will limit the amount of fluid drained from the anatomical space or cavity of the body, thereby avoiding hypotony within such anatomical space or cavity. The diffusion barrier of the device is preferably configured to fit between, and to be engaged by, adjacent recti muscles of the eye. Such engagement of the diffusion barrier with the adjacent recti muscles serves to prevent unwanted migration or post-implantation movement of the device, without the need for suturing of the device to the tissue of the eye.

The present invention relates to a showerhead that supplies a source gas and a supporting gas for depositing a film into a processing vessel of a film deposition apparatus. The showerhead includes a body which is provided with a gas jetting surface (8). In the showerhead body, there are defined a first diffusion chamber (60) that receives the source gas and diffuses the same, and a second diffusion chamber (62) that receives the supporting gas and diffuses the same. The gas jetting surface has source-gas jetting orifices (10A) that are in communication with the first diffusion chamber, and first supporting-gas jetting orifices (10B) that are in communication with the second diffusion chamber. Each of the first supporting-gas jetting orifices (10B) are formed into a ring shape that adjacently surrounds a corresponding one of the source-gas jetting orifices (10A).

A turbine airfoil or a substrate exposed to a high temperature environment having a plurality of modular formed cooling circuits with diffusion chambers and cooling holes for each module. Each module includes diffusion chambers and transpiration cooling holes and is placed on the airfoil substrate and a refractory material is formed over the modules. The modules are then leached away leaving the diffusion chambers and cooling holes formed between the substrate and the refractory coating.

Provided are an apparatus and a method for measuring gas transmission rates and nanoleaks of deformable and brittle materials. The apparatus includes a test chamber having an upper and lower diffusion cells that when closed form a chamber wall seal, a gas inlet and a gas outlet in fluid communication with the lower diffusion cell, the upper diffusion cell being fluidly connected to a high-vacuum mass spectrometer. The method of measuring gas transmission rates and nanoleaks includes placing a sealed package containing the test gas in the lower diffusion cell, closing the upper and lower diffusion cells, flushing the lower diffusion cell with a source of a second gas other than the test gas, closing off the source of the second gas; and measuring the leak rate of the sealed package.

The invention provides a device and measuring method for the hydrocarbon diffusion coefficient in rocks under high temperature and high pressure. The device mainly comprises a rock diffusion coefficient tester, a vacuum pump, a confining pressure pump, hydrocarbon gas source, nitrogen (N2) gas source, a left piston container, a right piston container, an automatic pressure pump, a chromatographic detector, a computer, a drying device and a rock saturated water device and the like. According to the device and method, the consistent accurate accordance of the gas injection balance pressure in the diffusion chambers respectively arranged at two ends of a core holder can be achieved and the existence of the hydrocarbon diffusion driven by the concentration gradient not by the pressure gradient in the whole process of experiment is ensured. Meanwhile, according to the device and method, the problem of low gas injection balance pressure, relatively low experimental temperature and having difference with the actual formation condition of the gas source balance pressure control device in the measuring of normal diffusion coefficient is resolved.

An ion source, capable of generating high density wide ribbon ion beam, utilizing one or more helicon plasma sources is disclosed. In addition to the helicon plasma source(s), the ion source also includes a diffusion chamber. The diffusion chamber has an extraction aperture oriented along the same axis as the dielectric cylinder of the helicon plasma source. In one embodiment, dual helicon plasma sources, located on opposing ends of the diffusion chamber are used to create a more uniform extracted ion beam. In a further embodiment, a multicusp magnetic field is used to further improve the uniformity of the extracted ion beam.

Sign 1 has frame 13 attaching to base 9 and supporting character plates 4. Casing 11 attaches to frame 13 and holds character plates 4 against frame 13. Light assembly 15 and base 9 backlight character plates 4. Backlight is diffusion chamber 17 sidelit by light assembly 15. Casing 11 hides access to the mount and is not easily removable. Light assembly 15 is externally powered and is activated by external messages and by low ambient light. An Emergency Alarm message causes flashing in one colour and intermittent activation of sound. For non-emergency, alternate light mode is used with constant sound. Transmitter 1501 transmits messages for the sign 1. The transmitter 1501 learns emergency telephone numbers for dial detection on a telephone line, in addition to standard emergency telephone number. Emergency button 1507 can begin transmission of emergency alarm message. Transmitter 1501 may have other alarm inputs.

A method for fabricating a quantitative organic vapor-particle sampler for efficient sampling, detection and quantitation of semi-volatile organic gases, vapors and particulate components. The sampler comprises a diffusion chamber and at least one annular denuder of which surface is coated with a macroreticular resin agglomerates which selectively absorbs organic gases, vapors or particulate matter present in tested samples.

An implantable human kidney replacement unit. Fully functional self contained, providing patients with end stage renal disease the freedom of traveling and moving about normally. Replacing donor kidneys. Implanted in the flank with at least one inlet and outlet tube each, sutured to the iliac artery and vain, at least one urine tube to the ureter. The housing constructed of anti-coagulant bacteriostatic materials has a plurality of reverse-osmosis process chambers with semipemeable membranes through the unit, followed by osmosis-diffusion chambers and membranes. Blood from the artery enters the first of the chambers. Small molecules such as water, magnesium, sodium, potassium, calcium, urea etc. are extracted from the blood according to their weight in atomic mass units as blood wipes past the self-cleaning membrane cartridges in the chambers. Molecules are further separated and urea sent to the bladder with excess water and electrolytes. The remainder is channeled to at least one diffusion chamber and reabsorbed into the blood. The same process is repeated in the other chambers where selected larger molecules such as creatinine and phosphorus are excreted, and some diffused back into the blood.

The invention discloses a test system and method for the diffusion coefficient and isothermal adsorption/desorption curve of shale gas. The test system includes: a core holder, the to-be-tested core contained at the center of which separates two ends into two gas diffusion chambers; a confining pressure component, which is connected to the core holder to load confining pressure to the core to replace the formation pressure; two gas containers loaded with different gases to inflate the gas diffusion chambers at two ends of the core holder respectively; a pressure balancer, which is connected to the core holder to balance the pressure of the two gas diffusion chambers; a constant temperature box, which is used for keeping the temperature of the core holder, the gas containers and the pressure balancer constant; and an acquisition and test component, which is used for collecting the gas at both ends of the core at different time so as to test the diffusion coefficient and collecting the pressure at different time to obtain the isothermal adsorption/desorption data curve. The test system saves the equipment cost.

A gas sensor, which could be a sensor of combustible gases, incorporates a diffusion chamber having symmetrical sensing and reference portions. A common source emits infrared-type radiant energy symmetrically into the two portions. Each portion incorporates a curved reflective surface which reflects incident infrared onto a respective sensor. Each sensor has a filter which passes a different selected band of energy. A fluid, such as gas being sensed, passes laterally through the chamber.

A DPF apparatus includes: a container; an exhaust inlet pipe; a diesel particulate filter; a pair of perforated plugs; a pair of partition plates; and a diffusion chamber. The exhaust inlet pipe is inserted into the container and having openings formed in a pipe wall thereof. The diesel particulate filter is disposed inside the container. The perforated plugs are separately disposed inside an end portion of the exhaust inlet pipe. The partition plates have one or more openings and disposed on the pipe wall of the exhaust inlet pipe. The diffusion chamber is defined by an inner wall face of the container, the perforated plugs, the partition plates, and the pipe wall of the exhaust inlet pipe.

Various embodiments provide an apparatus, system method for treating neurological conditions by delivering solid form medication to the ventricles or other areas of the brain. Particular embodiments provide an apparatus and method for treating epilepsy and other neurological conditions by delivering solid form medication to ventricles in the brain wherein the medication is contained in a diffusion chamber so as to allow the medication to dissolve in the cerebrospinal fluid of the brain and then diffuse out of the diffusion chamber to be delivered to the ventricles and brain tissue. In one or more embodiments, portions of apparatus have sufficient flexibility to conform to the shape of the ventricles of the brain when advanced into them and/or to not cause deformation of the ventricle sufficient to cause a significant physiologic effect.

An improved distribution valve is provided that distributes water from a swimming pool pump to cleaning heads located along the inner surface of a swimming pool. The distribution valve includes a housing having a fluid inlet and a plurality of fluid outlet ports. The housing includes a lower section and a removable upper section. A gear reduction assembly located in the housing includes a gear reduction mechanism and impeller located near the inlet port and connected to a rotary input shaft of the gear reduction mechanism. A cam device engages a rotary output shaft of the gear reduction mechanism so as to rotate the cam device in response to rotation of the impeller. The cam device rotates under a pliable annular disc on the rotary output shaft and lifts and lowers portions of the annular disc to sequentially open and close fluid paths through the fluid outlet ports.

The improved distribution valve may include a bypass chamber with a rotatable drum therein and a diffusion chamber in fluid communication with the fluid inlet. The drum wall includes a cutout. The drum is rotatable to fully or partially align the cutout with a bypass chamber inlet to permit water flow through the bypass chamber to help rotate the impeller. The impeller speed may be controlled by adjusting the water flow through the bypass chamber. The more water flow, the faster the impeller rotates. The drum is also rotatable to block the bypass chamber inlet to prevent water flow through the bypass chamber, in which case water from the diffusion chamber rotates the impeller. Impeller rotation will be at a slower speed due to the decreased water flow.

The invention provides a new spinning quenching unit, belonging to the technical field of chemical fiber processing. The quenching unit comprises two cabinet air flow rectifying devices, wherein each cabinet air flow rectifying device comprises a fine filter and an empty cavity; each fine filter comprises a perforated plate, a rectifying honeycomb plate and a protecting net in sequence from inside to outside; the lower ends of the two cabinet air flow rectifying devices are communicated with the empty cavities by blast pipes; deflector diffusion chambers are communicated below the empty cavities; horizontal drawer type coarse filters are arranged at the inlets of the deflector diffusion chambers and multilayer stainless steel screens and nonwovens are used for filtering; a computer is connected with an electric heating plate and air quantity regulating valves in a wired or wireless manner and controls the electric heating plate and the air quantity regulating valves; and the computer adjusted the temperature of the electric heating plate and the sizes of the air quantity regulating valves after processing the data measured by pressure and temperature detection devices. The quenching unit has the following beneficial effects: the speed of the quench air for cooling is uniform; the quenching unit can improve the quality of the formed fibers, is easy to dismantle and clean and has the functions of wind zone temperature control and adjustment of online processing technic of the computer.

The invention discloses an ejector with a spray nozzle position adjustable and a device. The ejector with the spray nozzle position adjustable comprises a primary flow tube, a spray nozzle, a receiving chamber, a secondary flow tube, a blending chamber and a diffusion chamber. An expansion device with the length varying along variation of pressure is arranged at the joint of the primary flow tube and the spray nozzle. The primary flow tube, the expansion device, the spray nozzle, the blending chamber and the diffusion chamber are sequentially connected along the axis. The spray nozzle position of the ejector is automatically adjusted simply through variation of the flow rate of primary flow, the performance of the ejector is changed accordingly, and the ejector can have good performance under different working conditions.