Showing papers on "Bellows published in 1995"

Carrier head design for a chemical mechanical polishing apparatus

Abstract: A carrier uses multiple bellows to form two pressure chambers between the housing and carrier base and retaining ring assembly. By pressurizing the first chamber, an even load can be applied across the substrate. By pressurizing the second chamber, the retaining ring can pressed against the polishing pad. The bellows allow the carrier base to pivot with respect to the housing, but the downward force is evenly applied to the substrate through the first pressure chamber. Torque is transferred from the carrier housing to the carrier base through the bellows.

Substrate spin cleaning apparatus

Abstract: A cleaning brush is fixed to a cleaner support that is mounted to a rotary element for vertical movement with respect thereto. The rotary element is rotatably supported by a forward portion of a support arm that is pivotable about a vertical axis at the rear of the support arm. A closed space defined by a bellows is connected to air piping having a pressure gauge and a regulator. The regulator is operable in response to variations of pressure resulting from engagement of the cleaning brush with a substrate, to control pressure within said bellows whereby the latter expands and contracts to raise or lower the cleaner support relative to the substrate as required to maintain the pressure in a predetermined range. The aforesaid construction responds fast enough to allow the cleaning brush to follow warping of the substrate with facility, and by so doing clean an entire substrate surface uniformly.

Actuators for simulating muscle activity in robotics

Abstract: An apparatus generates power at micro-scale dimensions that is sufficient to simulate the muscle activity required by the joints of robotic fingers. The apparatus includes a bellows device for generating a motion stimulus in response to pressure changes within the bellows. A configuration of programmable micromachined valves is used to regulate the flow of pressurized fluid within the bellows. A microprocessor is responsive to motion commands for controlling the operation of the apparatus. The apparatus is configured as an integrated device that is coupled to the articulations of a robotic hand via suitable attachment mechanisms.

Pneumatically shifted reciprocating pump

Abstract: A pneumatically actuated reciprocating fluid pump and shuttle valve combination is pneumatically shifted by pressurized air that exhausts from a respective pressurized bellows, diaphragm, or piston chamber, as the bellows, etc. nears the end of its pressure stroke (the exhaust stroke of the pumped fluid). This pressurized air exhausts from the bellows chamber via a shifting piston and cylinder mechanism within the bellows chamber that opens the bellows chamber at a specified location or point in the pump pumping cycle. The pressurized air exhaust from the bellows chamber acts on the end of the shuttle valve spool element to shift the spool element to its opposite position, which reverses the application of pneumatic pressure and atmospheric exhaust between the two bellows chambers to actuate the reciprocating pump.

Bellows pump dispenser

Abstract: A bellows dispenser (10) comprising, a plunger (11) telescopically mounted on a contaienr closure (12), and a bellows (21) defining a pump chamber (22), is provided with a screw-thread (46) on the plunger body to engage with a mating screw-thread (47) on the closure (12) to lock the plunger down in a non-use position during shipping and storage. During plunger lock down a bearing member (45) on the plunger (11) compresses the bellows (21) against a part of the closure (12) to close a container vent opening (44) for avoiding any leakage in such non-use position.

Method for stripping open ended bellows part from injection mold

Abstract: A method for stripping an open ended bellows part from an injection mold has as a first step the injection molding of a bellows part. The bellows part has a resilient portion located between a core pin (28) and a first split cavity (30) and a substantially rigid portion located between the core pin (28) and a second cavity (44). The substantially rigid portion has a first open end (46) and an external undercut portion (48), and the resilient portion of the bellows part has an inner surface and a second open end (50). The first split cavity (30) opens laterally to permit the resilient portion of the bellows part to be stripped from the core pin (28). Compressed gas passes through the core pin (28) to the inner surface of the resilient portion of the bellows part while both open ends of the bellows part are closed off by the second cavity (44) and the core pin (28). As the cavity and core portions of the mold separate, the second cavity (44) grips the undercut portion (48) of the substantially rigid portion of the bellows part, thereby pulling the resilient portion of the bellows from the core pin (28) while compressed gas maintains the resilient portion expanded. Finally, the second cavity (44) either opens or has a stripper rod (54) to disengage the undercut portion (48) of the substantially rigid portion of the bellows part so that the bellows part may be ejected from the injection mold.

Resin CVJ boot with distinct large and small crest portions

Abstract: The invention relates to a CVJ boot in which contact pressure of crest portions closer to a large-diameter mounting portion on the compressed side of a bellows portion is reduced when slant faces forming a root portion of a bending point obtained by the S-shaped bend come into contact with each other, thereby increasing durability.

Connecting member for exhaust pipe

Abstract: A connecting means for an exhaust pipe of a vehicle includes a bellows member made of metallic material and cylindrically corrugated for absorbing the deformation force due to the expansion and contraction of the exhaust pipe, an interlock member spirally formed on the inside of the bellows member and having spiral grooves for absorbing the deformation force due to the expansion and contraction of the exhaust pipe, a braid member for surrounding the outside of the bellows member, a cap for pressing an end part of the braid member, and a fixing member for combining the end parts of the bellows member and the interlock member. The fixing member includes a ring-shaped intermediate member one end part of which is welded under one end part of the bellows member, and the other end part of which is extended to be overlapped with the end part of the interlock member and provided with spiral protuberances to be fitted into the spiral grooves of the interlock member. Thereby, the service life of the connecting means is extended and product reliability is improved.

Vacuum exhaust valve

Abstract: A vacuum exhaust valve is disclosed for vacuum-operated exhaust lines of chemical vapor deposition equipment, which includes a sheathed heater (14) made of hollow metal tube spirally formed into a coil and heating wire inserted into the spiral tube, the sheathed heater (14) being mounted to sealingly shroud a reciprocally disposed valve disk (5). The sheathed heater (14) is provided inside a bellows (6) that is mounted to shield the core valve portion against the flow of chemical vapor flowing through the valve disk (5). Also, the sheathed heater (14) is vertically expandably disposed for synchronization with the vertical movement of the valve disk (5) as the latter is driven by an actuator (4) to move into abutting contact or away from a valve seat (7) between an inlet port (1) and outlet port (2). In addition, a sheathed thermocouple (18) is mounted inside the sheathed heater (14) for measuring the temperature of the latter and operatively connected to a temperature control device (20) for controlling the sheathed heater (14). With this arrangement, the temperature of the bellows (6), valve disk (5) and valve seat (7) is kept at a predetermined stable temperature range so as to minimize adhesion or deposition of chemical substance to their surfaces.

Airblast fuel nozzle with swirl slot metering valve

Abstract: An airblast fuel nozzle has an injector head with an extension or support strut. An annular valve spool with a fuel discharge orifice is fixed to the head and a metering assembly surrounds the valve spool. The metering assembly includes an axially-slidable annular valve sleeve and a metal bellows. The bellows, a compression spring, and one or more shims between the valve spool and the injector head provide a preset bias on the valve sleeve such that the valve sleeve initially closes or minimizes the fuel metering area through longitudinally-extending fuel swirl slots spaced about the valve spool at the discharge orifice. When fuel under pressure flows through the injector, the fuel pressure overcomes the preset bias of the sleeve and moves the valve sleeve axially with respect to the valve spool, thereby increasing the fuel metering area through the fuel swirl slots and allowing fuel to flow (with a swirling component) therethrough. The fuel flows through a convoluted path through a fuel circuit surrounding the bellows and valve sleeve, around the bellows, and between the valve sleeve and valve spool to the fuel swirl slots. The convoluted fuel path and fuel metering at the tip of the fuel injector reduces vaporization and coking of the fuel. The bellows, springs and shims provide for easily configuring the metering valve assembly to optimize fuel flow for the particular requirements of the engine.

Heat-radiator for CPU of a computer

Abstract: A heat-radiator for CPU of a computer, mainly including an air exhaust box, a collection funnel means and a bellows connecting the air exhaust box with the collection funnel means. An air blower and a detector means are disposed in the air exhaust box and connected by a circuit interface board inserted in an interface socket of the computer. The collection funnel means includes a heat-radiating plate located on the CPU, whereby the heat generated by the CPU is conducted through the heat-radiating plate and radiated therefrom to the ambient air and the hot air in the collection funnel means is sucked by the air blower to flow through the bellows and the air exhaust box to be exhausted from the computer housing.

Computer-controlled mechanical lung model for application in pulmonary function studies.

Abstract: A computer controlled mechanical lung model has been developed for testing lung function equipment, validation of computer programs and simulation of impaired pulmonary mechanics. The construction, function and some applications are described. The physical model is constructed from two bellows and a pipe system representing the alveolar lung compartments of both lungs and airways, respectively. The bellows are surrounded by water simulating pleural and interstitial space. Volume changes of the bellows are accomplished via the fluid by a piston. The piston is driven by a servo-controlled electrical motor whose input is generated by a microcomputer. A wide range of breathing patterns can be simulated. The pipe system representing the trachea connects both bellows to the ambient air and is provided with exchangeable parts with known resistance. A compressible element (CE) can be inserted into the pipe system. The fluid-filled space around the CE is connected with the water compartment around the bellows; The CE is made from a stretched Penrose drain. The outlet of the pipe system can be interrupted at the command of an external microcomputer system. An automatic sequence of measurements can be programmed and is executed without the interaction of a technician.

Inlet tube for an internal combustion engine

Abstract: An inlet tube (13) for interconnecting a carbureter (11) and an inlet pipe socket (12) of an internal combustion engine, especially in a motor saw, is made of a flexible material and provided with a bellows (16) for allowing relative movement between the carbureter and the engine. In order to prevent accumulation of fuel in the bellows, a telescopically slidable tube piece (17) is provided radially inside the bellows. The tube piece has an outer sealing surface cooperating with a complementary, surrounding sealing surface of the inlet pipe socket (12) in order to isolate the bellows from the interior of the inlet tube. The bellows is arranged adjacent to the intake pipe socket (12) in order to evaporate any liquid fuel accumulated in the bellows by heat supplied by said intake pipe socket.

Compact disk locking apparatus

Abstract: Apparatus for locking a workpiece, such as a compact disc, in a vacuum chamber includes a locking mechanism, movable between a locked position and an unlocked position, and a sealed bellows assembly that is coupled to the locking mechanism. The locking mechanism is automatically actuated by the bellows assembly between the locked and unlocked positions when the pressure in the chamber is changed by a predetermined amount. The locking apparatus is preferably used for locking the compact disc to a disc holder during processing and/or handling.

Finger for robot hand

Abstract: PURPOSE: To prevent an inconvenience that an object to be gripped comes off from a finger form body owing to inertia when the object to be gripped is gripped and its position is changed by bending the finger form body on a belly section side due to pressure of fluid from a fluid supply section which is supplied through an opening in a condition in which a basic end of the finger forming body is supported on a support member. CONSTITUTION: Bellows 8 made of a baglike rubber material of which basic end is opened and play end is blocked are arranged in a recessed space formed in a bent back section 7 in a condition in which a finger form body 1 is elongated. A basic end section on an opening side of a hose is attached and fixed to an end for connection provided in a support section 2, and a pump 3 is communicated and connected to an opening A of the bellows 8 to communicate the hose to an air exhaust port which can be opened and closed freely so that an attitude of each finger form body 1 can be changed over freely into a grip attitude at which each finger form body 1 is bent on a belly section side due to supply and exhaust of pressurized air from the pump 3 into the bellows 8 and a grip release attitude at which it is returned and elongated on a back side. COPYRIGHT: (C)1996,JPO

Respirator with a breathing filter

Abstract: A respirator including a mask body with a breathing filter at a breathing connection of the mask body, with a cuff accommodating the breathing filter and with a bellows, which seals the mask interior against the environment. The bellows is connected to the cuff and to the mask body. The breathing filter is locked in the position of use based on the bellows being made in one piece with the breathing connection, as a continuation of the mask body. The bellows surrounds the cuff in the manner of a truncated cone, in at least one partial section of the extent of the breathing filter.

Flexible coupling assembly

Abstract: The flexible coupling assembly has a liner with a radially outwardly extending flange and a bellows with a radially outwardly extending flange connected together by weld joint at a predetermined location on an end surface of the radially outwardly extending flanges. A connecting flange is movably maintained on the bellows between the outwardly extending flange of the bellows and a flexible portion of the bellows. The flexible coupling assembly is particularly suited for use in an exhaust system of a combustion engine.

Lifting mechanism for vacuum device

Abstract: PURPOSE: To provide a lifting mechanism for a vacuum device without the lower part of a vacuum chamber being complicated with a metallic bellows and an air cylinder. CONSTITUTION: A substrate holder 34 is fixed to a supporting cylinder 31 lifting up and down in two stages, and four substrate supporting pins 41 are provided so as to be vertically passed through the peripheral part of the holder. A flange 42 is furnished at the upper end of the pin 41 and a flange 43 at the lower end. A coiled spring 47 carrying a pin receiver 45 is inserted into a spring hole 49 in the base of a vacuum chamber 12 directly below the pin 41.

Convection cooling of bellows convolutions using sleeve penetration tube

Abstract: A sleeve assembly (42) for reducing the thermal conduction heat load from the bellows penetration tube (14) to the helium vessel (4) of a superconducting magnet assembly. The sleeve assembly is designed to force helium boil-off gas to flow in intimate contact with the bellows convolutions. The helium boil-off gas thereby intercepts or removes a portion of the heat that would normally be conducted from the bellows convolutions to the helium vessel. The sleeve assembly consists of a circular cylindrical rolled tube (44) made of laminated thermosetting material. The outer diameter of the tube (44) is wrapped with tape in a helical pattern. The diameter of the sleeve and the thickness of the tape wrapping are selected so that the outer circumferential surface of the helically wrapped tape abuts the inner diameter of the bellows (14). The sleeve is fabricated with a relatively small thickness to minimize thermal conduction load. The successive turns of the helical strip of tape are separated by a helical channel which forms a helical flow path for the helium boil-off gas as it flows toward the boil-off gas outlet. As the helium gas spirals around the sleeve assembly, the gas cools the bellows convolutions and the sleeve instrumentation wiring, thereby minimizing thermal conduction losses. Also, the gas will travel inside the bellows convolutions to minimize helium gas conduction inside the convolutions.

Multi-degree-of-freedom expansion joint

Abstract: An expansion joint includes a pair of tubular fittings joined together by a bellows for accommodating differential movement therebetween. The fittings include balls at respective distal ends thereof which engage complementary sockets fixedly joined to opposite ends of the bellows. The respective ball and sockets additionally accommodate pivotal and rotary movement. The bellows allows pressure and spring forces to engage the sockets against their respective balls for continuously seating the balls in the sockets during operation and maintaining effective seals against leakage.

Balanced single stage linear diaphragm compressor

Abstract: This invention involves a balanced single stage linear compressor with an oil-filled cavity to equalize pressure on the diaphragm The oil-filled cavity further includes a volume compensating gas chamber and a passive balancer A balance mass is attached to the bellows and is supported by a fluid film bearing The balance mass is arranged so that the oil displaced by the piston acts on the mass and displaces the mass in a direction opposite to that of the piston thereby balancing the apparatus

Apparatus for collecting and measuring body fluid

Abstract: An apparatus for collecting and measuring body fluid comprises a measurement container which is provided with a fluid inlet (2) at its uppermost end and at its lowermost end has a fluid outlet (3) where a rod-shaped valve means (4) is arranged, wherein the measurement container is constructed with an opening in the upper area through which opening the valve means may be activated, a fluid collection bag connected to the fluid outlet and suspended from the measurement container and a flexible connecting element (7), e.g. a bellows, which is mounted on the one hand on a rim region of the opening in the measurement container and on the other hand on the valve means, as the flexible conection (7) allows axial movement of the valve means (4, 5) relative to the measurement container (1).

Aircraft air conditioning hose

Abstract: A hose for an aircraft parked at a remote location from a source of pre-conditioned air through which the pre-conditioned air, under pressure, is delivered through the hose, wherein the hose construction uses to advantage a length portion having a bellows, in that the bellows folds are constrained by an internal strap from longitudinal expansion and thus are not "blown out" by the pressure air and yet, retain degrees of rotation and contraction.

Surgical instrument cleaning device

Abstract: A device for cleaning surgical instruments uses water from a main water supply wherein the device is capable of delivering a low volume of water at high pressure to the surgical instrument. The device has a pump for boosting a water solution pressure to approximately 85 psi before delivering the water solution to a spray nozzle. A manually operated dual injection system introduces a detergent or an instrument milk solution with the water through a venturi valve on the inlet side of the pump. Air bellows in the form of foot pedals actuate the dual injection system.

Apparatus for the articulated connection of pipes of an exhaust system

Abstract: The invention proposes a simple and inexpensive apparatus for the articulated connection of pipes of an exhaust system, such as of a motor vehicle, which has pipe sections connected by a flexible line part, such as a bellows, in which resilient elements engaging round the line part are provided having casing parts axially interengaging with projections and in each case connected to a pipe section and with at least one ring part, coaxial to the bellows, connecting both casing parts over their circumference in the vicinity of their projections

X-ray tube device

Abstract: PROBLEM TO BE SOLVED: To provide an explosion-proof function while downsizing a device by providing a bellows deformed by the expansion of insulating oil, and providing means for detecting the abnormal pressure rise of the insulating oil and preventing the breakage thereby which is composed of the protruding part of a tube vessel and a centrifugal pump. SOLUTION: The volume change by temperature of the insulating oil 5 within a tube vessel 2 is absorbed by a bellows 13 provided on the inside of a metal thin plate formed plastic deforming bellows cover 14 having an air hole 20 which is provided on the inside of one hard side plate 15 having an air hole 19 of the vessel 2. Further, a centrifugal pump 24 having vapor separating function is arranged on the outside of a protruding part formed on the vessel 2 which forms a bubble basin 22. A relief valve 9 for releasing gas from the rotating axial directional end surface is operated by the signal of a pressure sensor signal comparator 12 for generating the signal by the comparison of detected pressure between a tube vessel-side pressure sensor 10 and a pump discharge-side pressure sensor 11. Thus, only the gas is released when the pressure within the vessel 2 is a fixed value or more, and the discharge-side pressure reduces.

Assembly process including severing part of integral collapsible pump chamber

Abstract: A collapsible pump chamber (60) is provided which includes several functional elements of a pump device (20). For example, the collapsible pump chamber (60) may be a bellows (60) which includes a functional element of an outlet valve (80), a functional element of a biasing feature, and a functional element of a spin chamber. Consequently, a functional element of all of the downstream functions are incorporated into the bellows (60). This can significantly reduce costs, due to reduce tooling, and assembly, for example. Since it can be desirable to separate these functions (e.g., to achieve more consistent spray quality), a process is described for severing functions from the multiple function collapsible pump chamber (60) during the assembly of the pump device (20). Dunnage means is also described for reducing the collapsed volume within the collapsible pump chamber.

Self=pumping air spring for vehicle shock absorber

Abstract: The air spring has a rolling bellows (3), which encircles a spring chamber (6) and a spring support. The support is formed by a piston rod (9) which can move axially in a cylinder (7). An air space (29) is arranged inside the bellows and the cylinder, and has at least one connection to the chamber and to an air reservoir. As the piston rod moves, air is pumped from the space into the chamber, via a one-way valve (43). At least one of the components of the air spring which performs the pumping process, is the piston rod.

Air filter for vehicle engine

Abstract: The air is drawn into the filler interior (1) using main and auxiliary inlets (2,3). The intake opening (5) of the auxiliary intake (3) is at a higher level than that (4) of the main one (2), which is shut off by a valve (10) when the vehicle is immersed in water for more than a predetermined depth. The valve can consist of a hinging flap shut hydraulically by the water above the road surface, typically using a vertical pipe open to the underside (8) and with an expanding body such as a bellows connected to its top end, and which acts on the flap. The latter can be spring-loaded into the open position.

Pneumatic suspension system for heavy goods vehicle

Abstract: The system has an additional pneumatic chamber (K2) which is arranged in the hollow axle or its housing (2,2'), the housing annulus to lie coaxial to the space for the drive shaft. Axle or its housing consist of several parts or shells, or again are cast in one piece. The pneumatic suspension consists of a pneumatic piston (3") and bellows (3'). The piston is fixed to axle or axle housing. A valve (4) which is fitted to the bellows end or non-bellows end of the piston is used to connect the main and auxiliary air chambers (K1,K2).