Showing papers on "Bellows published in 2010"

Gas flow path structure and substrate processing apparatus

Abstract: A substrate processing apparatus includes: a depressurizable processing chamber 11 ; a shaft 26 supporting a facing electrode 24 provided within the processing chamber 11 while allowing the facing electrode 24 to be movable with respect to a mounting electrode 12 ; a first ring-shaped bellows 31 concentrically installed at an outer peripheral portion of the shaft 26 ; and a second bellows 32 concentrically installed at an outer peripheral portion of the first bellows 31 . The first bellows 31 absorbs a displacement of the facing electrode 24 with respect to a wall surface 13 at a penetration portion where the shaft 26 penetrates the wall surface 13 of the processing chamber 11 , and seals the inside of the processing chamber 11 against the ambient atmosphere around the shaft 26 . A ring-shaped gas flow path 35 is formed by the first bellows 31 and the second bellows 32.

Microfluidic mixing and analytical apparatus

Abstract: Disclosed herein is a device comprising a pair of bellows pumps configured for efficient mixing at a microfluidic scale. By moving a fluid sample and particles in suspension through an aperture between the paired bellows pump mixing chambers, molecular collisions leading to binding between the particles and ligands in the sample are enhanced. Such devices provide an alternative for mixing that does not use a vent and can be used with a variety of particles in suspension such as magnetic beads to capture or purify useful cells and molecules.

A Parylene Bellows Electrochemical Actuator

Abstract: We present the first electrochemical actuator with Parylene bellows for large-deflection operation. The bellows diaphragm was fabricated using a polyethylene-glycol-based sacrificial molding technique followed by coating in Parylene C. Bellows were mechanically characterized and integrated with a pair of interdigitated electrodes to form an electrochemical actuator that is suitable for low-power pumping of fluids. Pump performance (gas generation rate and pump efficiency) was optimized through a careful examination of geometrical factors. Overall, a maximum pump efficiency of 90% was achieved in the case of electroplated electrodes, and a deflection of over 1.5 mm was demonstrated. Real-time wireless operation was achieved. The complete fabrication process and the materials used in this actuator are biocompatible, which makes it suitable for biological and medical applications.

Heaving ocean wave energy converter

Abstract: An ocean wave energy device uses large gas filled and surface vented or evacuated flexible containers having rigid movable ends and rigid fixed depth ends connected by flexible bellows, suitably reinforced against external hydrostatic pressure, submerged to a depth below anticipated wave troughs. One or more containers compress and expand as waves and troughs, respectively, pass overhead driving hydraulic or pneumatic, pumping means producing pressurized fluid flow for a common sea bed motor-generator or for other uses or on-board direct drive generators. Mechanical, hydraulic or pneumatic means re-expand said containers when a wave trough is overhead. Power output is augmented by mechanically connecting said rigid moving surfaces to surface floats, which may also provide said surface vent such that as waves lift and troughs lower said floats, said containers are further compressed and re-expanded, respectively. Depth fixing and adjustment means for tides and sea-states are provided.

Bellows preload and centering spring for a fan drive gear system

Abstract: An assembly includes a first tapered roller bearing (14A) and a second tapered roller bearing (14B) and a bellows spring (20). The bellows spring is disposed adjacent the first tapered roller bearing and the second tapered roller bearing. A method of applying a preload to a first tapered roller bearing and a second tapered roller bearing is also disclosed.

Heat pipe with axial and lateral flexibility

Abstract: A flexible heat pipe is disclosed for use with evaporator and condenser elements for removing heat from electronic components. The flexible heat pipe comprises a bellows member fixed at one end to a condenser member and at an opposite end to an evaporator member. A cable artery is disposed within the bellows and is fixed at one end to the evaporator, and slidingly engages the condenser at the opposite end. The bellows acts as a flexible vapor envelope, and the cable artery acts as a flexible wick for directing condensed working fluid from the condenser back to the evaporator. The sliding connection between the cable artery and the condenser allows relative axial movement, and the inherent flexibility of the cable artery allows relative lateral movement. Thus, the condenser and evaporator can move in all directions with respect to each other, which can provide desired vibration isolation of the two components.

Mems electrochemical bellows actuator

Abstract: An implantable fluid delivery system may include a fluid reservoir configured to hold a supply of fluid, to dispense that fluid under the control of an actuator, and to be implanted within the body of a living host. An actuator within the fluid reservoir may cause the fluid to be controllably dispensed from the fluid reservoir. The actuator may include a bellows configured to expand in a direction when inflated. The bellows may have folds with surfaces which run substantially perpendicular to the direction of expansion in a collapsed state and which define a stacked set of convolutions. Each convolution may have a collapsed height of no more than 1 mm and a width perpendicular to the direction of expansion of no more than 8 mm. Electrodes may be configured to come in electrical contact with an electrolyte within the bellows and to cause electricity to run through the electrolyte, thereby causing the electrolyte to break down into a gas and, in turn, to cause the bellows to expand. Methods of making the bellows which utilize stacked sheets are also disclosed.

Development of coarse/fine dual stage using pneumatically driven bellows actuator and cylinder with air bearings

Abstract: In this paper, a coarse/fine dual positioning stage for single degree of freedom using pneumatic actuators is developed. The coarse movement utilizes a pneumatic cylinder with air bearings. The fine movement utilizes an actuator driven by pneumatic bellows. A high-performance pneumatic servo valve, we have developed, having high dynamics up to 300 Hz is used to control the coarse stage. The fine stage is controlled with a nozzle-flapper type servo valve. The fine stage is mounted on the coarse stage. As the proposed coarse/fine dual stage is pneumatically driven, the stage has advantages of low heat generation and non-magnetic those are suitable for ultra precise positioning. The control method of the dual stage is proposed. The experimental results demonstrated that the steady state error is less than 5 μm for 100 mm stroke with the coarse stage and it is minimize to 20 nm with the fine stage.

Joint movement supporting device

Abstract: When air is supplied by an air pressure regulation part to bellows 211 through 213 of finger joint motion facilitation parts 110j (where j=1 , ..., 5), the bellows 211 through 213 expand approximately in the shape of circular arcs, since annular grooves on the side of the bellows 211 through 213 opposing a joint are elastically restrained by elastic members 241 through 243. Due to this, the bellows 211 through 213 cooperate, and exert force in the rotational direction to flex the first through the third joints of a finger from their extended states. Next, when air is exhausted from the bellows by the air pressure regulation part, the bellows 211 through 213 contract. Due to this, the bellows 211 through 213 cooperate, and exert force in the rotational direction to extend the first through the third joints of a finger from their flexed states. The forces generated in this manner are transmitted to the joints by transmission members 231 through 234. As a result mounting becomes simple, and also it is possible to facilitate sufficient joint movement for each joint.

Technical Note: Development of a tidal volume surrogate that replaces spirometry for physiological breathing monitoring in 4D CT

Abstract: Purpose: Spirometry exhibits baseline drift and frequent measurement errors so it cannot be used by itself to provide tidal volume-based image sorting or breathing motion modeling. Other breathing surrogates, in this study an abdominal bellows system, are drift free but do not measure tidal volume. Simultaneously using spirometry and the bellows system allows the user to convert the recorded bellows signal to tidal volume but still relies on spirometry measurements. The authors therefore propose to use CT-based air content, rather than a spirometer, to convert the bellows signal to tidal volume. Methods: 41 4D CT data sets are acquired, while the breathing cycle is simultaneously measured using spirometry and an abdominal pressure bellows system. The assumptions underlying the conversion of the bellows measurement to tidal volume by CT-based air content are analyzed. This comprises of detailed correlation studies of the spirometry-measured tidal volume, the bellows signal, and CT-based air content. Results: For 15/41 patients, the spirometry signals are not consistently acquired during the 4D CT session, so correlating spirometry to bellows measurements and CT-based air content leads to erroneous conversion coefficients. After introducing a minimum correlation threshold to remove these data, good correlations are obtained between the remaining breathing signals. The ratio of CT-based air content to tidal volume is measured to be 1.110.08; the expected value is 1.11 because room air is 11% more dense than air in the lungs. Conclusions: The observed problems of spirometry recording illustrate the challenges encountered when using spirometers as breathing surrogate for 4D CT acquisition. The high correlation between spirometry and bellows breathing signals and the verified factor of 1.11 between CT-based air content and tidal volume mean that the bellows measurement or other equivalent surrogates can be reliably converted to tidal volume using the CT-based air content, avoiding the need for a spirometer. © 2010 American Association of Physicists in Medicine. DOI: 10.1118/1.3284282

Numerical and experimental investigation of the effect of the pressure path on forming metallic bellows

Abstract: Tubular metal bellows have wide applications in different industries. They are mainly manufactured in the open die hydroforming process, which comprises two stages of bulge and closing (final forming). In this paper, the effect of pressure path on forming bellows in both stages was studied by finite element simulation and experiment. The results obtained from simulation illustrated that the pressure path influences the production of the desired parts, or the occurrence of bursting or wrinkling defects in the products. Experiments were carried out to verify the simulation results. By using the simulation and experimental results a comprehensive forming window for bellows was presented. Based on this forming window, the wrinkling and bursting defects for bulge and closing stages, and the safe zone for producing the desired part were determined. The study also showed that the number of convolutions does not influence the internal pressure and maximum forming load, but affects the forming energy.

Ocean wave energy converter capturing heave, surge and pitch motion

Abstract: An ocean wave energy device uses large gas filled and surface vented or partially evacuated flexible containers each having rigid movable ends and rigid fixed depth ends connected by flexible bellows, suitably reinforced against external hydrostatic pressure, submerged to a depth below anticipated wave troughs. One or more said containers compress and expand as waves and troughs, respectively, pass overhead driving hydraulic or pneumatic, pumping means producing pressurized fluid flow for a common sea bed motor-generator or for other uses or on-board direct drive generators. Mechanical, hydraulic or pneumatic means re-expand said containers when a wave trough is overhead. Power output is augmented by mechanically connecting said rigid moving surfaces to surface floats, which may also provide said submerged container venting such that as waves lift and troughs lower said floats, said containers are further compressed and re-expanded, respectively. Power output is further augmented by wave kinetic energy capture through focusing, reflection and refraction.

End effector with suction cups having internal valves

Abstract: An air retriever, such as a bellows ( 24 ) is used in an end effector ( 18 ) for lifting work products ( 22 ) in prearranged configurations, and delivery to a container ( 20 ) in a predetermined pattern. An air flow control valve ( 50 ) is positioned in each bellows ( 24 ) for individually controlling the flow of air through each bellows so that the bellows in a pick zone may draw air for picking up work products while air flow is not applied to the other bellows out of the pick zone.

Bellows plungers having one or more helically extending features, pumps including such bellows plungers and related methods

Abstract: A pump system includes at least one pressure chamber at least partially defined by a helical bellows plunger comprised of a tubular body, a closed front portion, an open rear portion, and at least one contour extending continuously as a helix, longitudinally from proximate the front portion to proximate the rear portion. Methods for forming a helical bellows plunger include molding the helical bellows plunger using a mold core comprising a helically extending exterior contour and a cooperatively associated mold cavity comprising a helically extending interior contour of substantially a same pitch and configured to align with the helically extending exterior contour of the mold core, introducing a molding material therebetween, curing the molding material, and unscrewing the cured molding material from the mold core. Various configurations of helical bellows plungers are also disclosed.

Device for dispensing a liquid-to-pasty product using a metering pump having a low dead volume

Abstract: The invention relates to a device (1) for dispensing a liquid-to-pasty product (2) to be placed at the open end (3) of a rigid container (4) and consisting of a manual metering pump (5) for dispensing a predetermined amount of the product (2) to be dispensed, including: a base member (6) to be placed on the container (4), a push button (8) provided with a dispensing spout (9) capable of acting, when pumped, against an intermediate bellows (11) comprising opening/closing means provided at the upper end of said bellows (11), characterised in that the push button (8) is combined with a cylindrical chamber (8A) directed towards the inside of the bellows (11) and extending inside the bellows (11) so as to form a dead volume with a predetermined value inside same and to accordingly reduce the available air volume, thereby improving the compression rate when pumped.

Container and vending machine

Abstract: A collapsible container is made with a pair of upper and lower bellows sections connected by a rigid section with inwardly tapering ends, such that the container can be collapsed with the rigid section and the bellows sections overlapping. The collapsible container may be provided with an identifier such as an RFID tag which cooperates with a vending machine with a detector such as an RFID reader so as to dispense liquid into the container.

Multistage over fire air distributing mode

Abstract: The invention provides a multistage over fire air distributing mode. The mode comprises a primary air pulverized coal nozzle, a secondary air nozzle, main burners, low separating over fire air bellows and high separating over fire air bellows, wherein a group of the main burners is arranged at each corner of a hearth; the separating over fire air is divided into low separating over fire air and high separating over fire air; the low separating over fire air bellows are arranged at four corners of the hearth or on four walls; and the high separating over fire air bellows are arranged at the four corners of the hearth or on the four walls. The distributing mode can realize NOx low emission based on NOx effect of between 250 and 650mg/m3 controlled by integral air classification technology in the current combustion bituminous coal and meager coal furnace (oxygen concentration in smoke is 6 percent.) so as to reduce the generation amount of NOx by about 15 percent. The equipment solves the problems of high combustibles in fly ash caused by the integral air classification technology in the furnace, large difference between speed and temperature of smoke at the outlet of the hearth and the like, and improves the operation regulating performance on different coal varieties and load changes.

Flexible vibration absorbing tube

Abstract: A flexible tube includes a bellows tube, an interlock tube placed inside the bellows tube, and upstream-side and downstream-side joint pipes coupled to opposite ends of the bellows tube. Diameters of fixing end portions located at opposite ends of the interlock tube are made larger than a diameter at a middle portion of the interlock tube, extension portions of the upstream-side and downstream-side joint pipes are fitted and fixed to inner peripheral surfaces of the fixing end portions of the interlock tube, and a depth of each of valley portions of a bellows portion of the bellows tube located over the fixing end portions is smaller than a depth of other valley portions of the bellows portion. Accordingly, it is possible to achieve the downsizing of the flexible tube that is connected to an exhaust system being continuous with an engine to dampen vibrations in the axial direction of the exhaust system.

Pneumatic indicator for detecting liquid level

Abstract: A pneumatic sensor/indicator device includes a sensor assembly having a bellows receiving chamber and sensor housing. An elastic bellows is in the bellows receiving chamber. A shaft connects to the bellows so bellows extension/retraction causes shaft axial movement. A magnet connected to the shaft generates a field moving an indicator ring. An indicator dome connects to the sensor body. The indicator ring is in the sensor housing in a non-indicating condition and displaces into the indicator dome providing a visible indicating condition. A flexible sensor tube connected to the sensor/indicator device extends into a well tube having a level sensing tube extending therefrom. A well fluid level rising above a level sensing tube inlet end increases inlet pressure port pressure inducing bellows axial displacement causing indicator device movement toward the indicating condition. The dome and indicating ring are isolated from the well preventing well contents entering and fogging the dome.

Exhaust system conduit with thermal/noise insulation

Abstract: A flexible conduit for use in a pipe system such as a vehicular exhaust system to provide a torsional or non-torsional joint between two pipes. The conduit has an outer bellows and an inner liner between which a layer of noise/thermal insulation is sandwiched to attenuate noise, resist thermal transmission and dampen vibration.

Variable-volume bellows bottle

Abstract: The invention relates to a variable-volume bottle made from PET and having an elastically deformable and plastic-deformation-resistant bellows structure, which allows the volume of the bottle to be adjusted according to the degree to which the peripheral annular folds are folded. The invention comprises one or more sectors without peripheral annular folds, intended for identification labels.

Bumper for air spring

Abstract: An air suspension system includes a plastic or metal piston fixed to the vehicle axle and an elastomeric bellows which is air tightly vulcanized from its lower open end to the upper part of the piston and from its upper open end to the metal plate fixed to the vehicle chassis to form a pressured air chamber and a single-piece bottom plate with bumper, which is completely made of reinforced plastic material The air suspension system includes a compression part vulcanized to the elastomeric bellows and a bumper part absorbing the loads and which is mounted to the upper side of the piston after that it is vulcanized to the lower open end of the elastomeric bellows

Heat absorption tube for solar energy

Abstract: The absorber pipe (1), especially for a parabolic collector for a solar he at collecting apparatus, is described. The absorber pipe (1) has a central meta l pipe (3) and a glass sleeve tube (2). An expansion compensation device (10) is provided, which is arranged at least partially in an annular space (4) betwe en the metal pipe (3) and a glass-metal transitional element (5), which is attached to the sleeve tube (2). The expansion compensation device (10) can have a folding bellows (11). Furthermore a connecting element (15) is provided, which has either a cylindrical or a conical section (17, 18,18'').

Bellows type mechanical seal

Abstract: A bellows type mechanical seal including a sealing ring and a mating ring, wherein either one of the sealing ring or the mating ring is retained in a housing and the other one is mounted on a shaft and wherein the sealing ring is supported by a bellows and the bellows has a retainer welded thereto on one of the sides for retaining the sealing ring and a collar welded on the other side to form a bellows assembly, is characterized in that the entire surface of the bellows assembly is covered by an erosion-resistant film formed by the physical vapor deposition, such as ion-plating.

Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner

Abstract: The invention discloses a self-stabilizing three-stage air-distribution low-NOx pulverized coal burner. A pre-burning chamber and a conical barrel formed by the cone expansion and extension of an internal secondary air duct are arranged in an external secondary bellows. A large end of the conical barrel is sheathed in an external secondary air passage formed by an opening at one end of the pre-burning chamber. A wall surface at the other end of the pre-burning chamber, which is closed with an external end face of the external secondary bellows, is provided with an annular tertiary air passage.A central air duct is coaxially arranged in a primary air duct. The primary air duct and a cone expanding end of the central air duct are both arranged in the conical barrel. The internal secondary air duct sheaths the outside of the primary air duct. An axial movable cyclone impeller is arranged in the internal secondary air duct. The outer end of the axial movable cyclone impeller is provided with an internal secondary air impeller pull rod. An annular passage of a separating plate is provided with an air regulator. The outer end of the air regulator is provided with an air regulating pullrod. The circumference at the inner end of the air regulating pull rod is equally divided to arrange sliding fins cooperating with an internal secondary bellows in a sliding manner. The burner has strong self-stabilization capability, can adjust a flame position, prevent slag formation in the pre-burning chamber and realize low NOx emission, and is capable of wide application in various industrialpulverized coal boilers.

Sintering device, sintering cooler and its flexible sealing device

Abstract: The invention discloses a sintering machine or a sintering cooler and a flexible seal equipment thereof, which can reduce the power consumption of blowers, decrease the air leakage of the equipment, increase the waste heat recovery efficiency and improve the environment. The sintering cooler comprises a sinter-loading trolley, an overhead hood above the trolley, a bellows below the trolley, an upper flexible seal device arranged between the hood and the upper part of the trolley, and a lower flexible seal device or a lower lamination seal device arranged between the lower part of the trolley and the bellows; wherein, the slideway of the bellows is glidingly contacted with a flexible slide plate of the trolley; the upper flexible seal device is used to seal the gap between the hood and theupper part of the trolley; and the lower flexible seal device or the lower lamination seal device is used to seal the gap between the lower part of the trolley and the bellows.

Forming method for high-temperature alloy sine bellows spring

Abstract: The invention belongs to a thermal forming technique and relates to the improvement of a manufacture method for a high-temperature alloy sine bellows spring, which comprises the following forming steps of punching and cutting spring blank, mechanically deforming the spring blank, and carrying out solid solution and aging thermal treatment to the spring blank together with a thermal treating mould. The invention solves the problem that the shape of the bellows spring can not be kept after the bellows spring is machined and formed, ensures the design requirements of physical dimensions and wave shapes of the bellows spring, and improves the machining qualified rate of the bellows spring.

Nasal interface prong device

Abstract: An infant nasal interface prong device for use with an nCPAP system. The device includes first and second nasal prongs and a base. Each prong includes a bellows segment, a tip, and a lumen. The tip extends from the bellows segment to a tip end and is adapted for insertion with an infant's naris. The lumen extends through the tip and the bellows segment. In an undeflected state, a central axis of the lumen along the bellows segment is transversely offset from the lumen axis at the tip end. The base is connected to each of the nasal prongs and is adapted for coupling to a CPAP generator. The bellows segment renders the corresponding prong highly flexible relative to the base. The offset positioning of the tip end promotes desired positioning of the base/CPAP generator, relative to the patient and more closely conforms to the expected nasal anatomy.

Bellows stop valve

Abstract: The utility model relates to a bellows stop valve, which comprises a valve body, a valve cover, a bellows, a valve rod, a hand wheel and a valve clack. The valve cover is fixedly connected with the valve body through a bolt, one end of the valve rod is connected with the valve clack, and the bellows is sleeved on the valve rod. The bellows stop valve is characterized by further comprising a valve rod nut, a sealing cover and a locating pin. One end of the valve rod is provided with a lead screw, and the valve rod nut is sleeved on the lead screw and fixedly connected with the hand wheel. The sealing cover is fixed between the valve body and the valve cover, one end of the bellows is fixed with the sealing cover, and the other end of the bellows is fixed with the valve clack. The valve body is provided with a clamping groove, and the locating pin is fixed on the valve rod and clamped onto the clamping groove in sliding mode. The bellows stop valve is reasonable in structural design, simple in structure, low in cost and convenient to use.

Bellows evaporative cooling air conditioning unit with automatic winding filter

Abstract: The utility model relates to a bellows evaporative cooling air conditioning unit with an automatic winding filter, comprising a unit shell; the two side walls of the shell are respectively provided with a primary air inlet and a primary air outlet; the shell is internally provided with a fresh air section, the filter, a pipe-type indirect evaporative cooler, a direct evaporative cooler, a water baffle and an air blower in sequence from the primary air inlet to the primary air outlet; the side wall of the shell, opposite to the pipe-type indirect evaporative cooler, is provided with a secondary air inlet; and the wall of the shell, which is arranged at the upper part of the pipe-type indirect evaporative cooler, is provided with a secondary air outlet. The evaporative cooling air conditioning unit utilizes an evaporative cooling technique, and carries out optimized design on the filter, the pipe-type indirect evaporative cooler and the direct evaporative cooler, thus improving the heat-transfer and mass-transfer effect of the evaporative cooler.