Showing papers on "Bellows published in 1999"

Sachets for bio-pharmaceutical fluid products

Abstract: A flexible sachet for transporting bio-pharmaceutical liquids with a volume of 50 liters or more, of the bellows type, assumes when filled a substantially parallelepiped shape. It comprises a bottom wall, a top wall and four lateral walls. It is made of a single laminated film with three or more layers, the innermost layer being a plastics material layer that can be heat welded and is biocompatible with the media transported. A method of manufacturing the sachet is also disclosed.

Semiconductor wafer polishing apparatus with a variable polishing force wafer carrier head

Abstract: A carrier head for a semiconductor wafer polishing apparatus includes a rigid plate which has a major surface with a plurality of open fluid channels. A flexible wafer carrier membrane has a perforated wafer contact section for contacting the semiconductor wafer, and a bellows extending around the wafer contact section. A retaining member is secured to the rigid plate with a flange on the bellows sandwiched between the plate's major surface and the retaining ring, thereby defining a cavity between the wafer carrier membrane and the rigid plate. A fluid conduit is coupled to the rigid plate allowing a source of vacuum and a source of pressurized fluid alternately to be connected to the cavity. An additional wafer carrier membrane is internally located with respect to the cavity formed by the wafer carrier membrane, and forms another cavity with respect to the rigid plate. Another fluid conduit is connected to the internal wafer carrier membrane's cavity, which is selectively pressurized to make the internal wafer carrier membrane contact the wafer contact section.

Study on dynamic characteristic analysis of air spring with auxiliary chamber

Abstract: The characteristics of air springs, such as the effects of bellows and those of heat transfer on spring constant and damping factor, have been studied. However, auxiliary chambers and pipes are required in addition to air springs, to vary spring constant in the case of spring rate change by electronically controlled air suspension systems of a vehicle. Few reports have dealt with the effects of auxiliary chambers and pipes. In our study, the relation between vibration frequency and spring reaction has been investigated to clarify the effects of pipes on dynamic spring constant. Our proposed model has proved effective in understanding the phenomena.

Injector bottle cap assembly

Abstract: A flavor enhancing mechanism for bottled water, club soda, and bland liquid comestibles, is described. The flavor enhancing mechanism includes a bottle cap containing a flexible bellows. The bellows is generally transparently clear, flexible plastic. The bottle cap and bellows are mounted upon a bottle containing a liquid comestible, whose flavor is to be enhanced. The bellows contains concentrates of fruit juices and/or other natural flavors. The bottle cap is designed to be screw threaded or snap fitted onto the standard lip portion of glass or plastic drinking containers. Upon application of a downward force, the flavor enhancers are squeezed from the flexible bellows, and injected downwardly into the bland liquid substances held in the bottle.

Liquid propellant rocket engine

Abstract: The liquid-propellant rocket engine comprises two combustion chambers, a gas generator, a turbopump assembly, pipelines as well as a frame having footpads and supports located in different planes that are perpendicular to the engine axis, said frame being made up of at least two welded rod sections. Said sections are fastened to each other by a plane rod joint. The engine pipelines are connected to the combustion chambers and comprise bellows balances or flexible hoses which have their movable ends connected directly to the combustion chambers or to pipes joined thereto. The frame is made demountable due to the use of threaded connections that joint together the frame sections and the plane rod joint. The frame is made as a compensation frame by placing the footpad plane over the support plane. A curved pipe joint comprises a curved pipe, a hinge and a frame. At its end on the outlet side, the pipe is provided with a balance for compensating angular displacements, for instance, a bellows balance with a cardan mechanism. The curved pipe is connected to the frame by a hinge, and its outlet end is gas-tightly connected to the bellows of the balance.

Thin wall, high pressure, volume compensator

Abstract: Accumulators/compensators (66) for pressurized fluent material systems (60) are provided, in which a continuous substantially non-permeable, flexible membrane (72) such as a bellows surrounds or is surrounded by a non-gaseous support medium (74), all within a surrounding housing (70). Various combinations of support media, which may include internal gas-filled cavities, are described and illustrated.

Control unit for lifting and lowering vehicle structures of air-sprung vehicles has between compressed air source and air spring bellows two parallel branch pipes with locking valve

Abstract: The control unit which has level regulators has between a compressed air source (1) and air spring bellows (2) two parallel branch pipes (5, 7) of which one contains the level regulating valve (9). One or both branch pipes has a locking valve (14) which can be switched on one side electrically and on the other by a spring (18) into two positions so that in the position switched by the spring the branch pipe having the level regulating valve is switched free and in the electrically switched position the other branch pipe is switched free.

Shape memory alloys for use in thermally activated clothing, protection against flame and heat

Abstract: Shape memory alloys (SMA) have been in use as actuators in many mechanical processes for some time. The alloys are trained to return to a given shape when an actuation temperature is reached. These alloys can be incorporated into clothing systems. Once actuated the clothing layers will separate resulting in an increased air gap. The air gap is one of the major determining factors for insulation. To have this increase prior to exposure to intense heat, i.e. a bulky garment, would subject the wearer to heat stress, Presently nickel titanium alloy has been investigated. A flat spring shape with a transition temperature of similar to 45 degrees C has shown good potential, Initial testing on the cone calorimeter has demonstrated a significant increase of protection at heat Bur of 15 kW/m(2), giving an extra 40 s before the onset of second degree skin burn. The springs can be incorporated in bellows pocket panels. The pleats allow for the expansion of the air gap while the attachment of the spring holds the fabric layers together prior to actuation. Potential applications are for the fire service, drivers in enclosed vehicles, e.g. tank crew, racing drivers and any other personnel who may be accidentally exposed to intense heat.

Pneumatic spring with a vibration damper

Abstract: A pneumatic spring having a vibration damper and a rolling bellows which defines a spring chamber. The rolling bellows is actively connected at one end to the vibration damper which has a container pipe which possesses a connecting bearing to a motor vehicle chassis. The connecting bearing is arranged in the region of the outer surface of the container pipe. The connecting bearing is of circular design and possesses a sealing ring which seals the spring chamber. Furthermore, the connecting bearing can be designed as a pivot bearing, having at least one universal ball joint in conjunction with a ball socket. Optionally, an air direction device may be assigned to the pneumatic spring, producing a targeted air flow onto the container pipe.

A bellows-shape electrostatic microactuator

Abstract: The bellows-shape electrostatic microactuator was developed by using a novel fabrication technique which combines excimer laser ablation and polymer/metal film deposition. The actuator consists of ∼2.5 μm thick parylene (poly- para -xylelene) polymer bellows and gold electrodes. The actuator is 1.2 mm in diameter and the bellows part is a hollow screw thread the pitch of which is 23 μm. Parylene and gold electrode are evaporated on the screw-shape polyimide core mold made by excimer laser ablation. At the end of the fabrication, the core mold is removed by wet etching. The actuator is driven by DC voltage and the displacement is 30 μm (3.4% of the length of the actuator) and the actuation speed exceeded 20 μm/ms when applied 100 V.

Control valve for variable displacement compressor

Abstract: PROBLEM TO BE SOLVED: To improve a valve performance by increasing a valve opening area without increasing a size and without reducing a pressure resistance. SOLUTION: A control valve for variable displacement compressor 1 is provided with a body 2 installed in a valve storing chamber 36 of a variable displacement compressor, a sealing member 25 which is installed between the body 2 and the valve storing chamber 36 and partitions the valve storing chamber 36 into a suction pressure introducing chamber 22 and a control pressure introducing chamber 23, a communicating path 6 which is provided in the body 2 and communicates the suction pressure introducing chamber 22 with the control pressure introducing chamber 23, a bellows 16 which is installed in the communicating path 6 and displaced according to a pressure in the suction pressure introducing chamber 22, and a valve element 18 which is installed connectedly onto the bellow 16, displaced following to the displacement of the bellows 16 and opens and closes valve seats 14 and 15 installed partly in the communicating path 6. Also the valve element 18 is provided with a main valve part 19 which opens and closes the main valve seat 14 installed in a part of the communicating path 6 and an auxiliary valve part 21 which opens and closes the auxiliary valve seat 15, and both main and auxiliary valve parts 19 and 21 open and close both valve seats 14 and 15 simultaneously.

Flexible line element

Abstract: A flexible line element, particularly for exhaust pipes of internal combustion engines of motor vehicles, is characterized in that it has at least two interconnected, metal bellows provided with cylindrical joining ends and at least one of the bellows is helically corrugated. This and/or the bellows are telescoped and two bellows are connected at only one of their joining ends. A line element constructed in this way is on the one hand torsion-soft, so that it does not transfer any torsional stresses to adjacent components, and on the other is also stable in the case of high torsional stresses.

Apparatus and method of laser welding inside bellows joints and spacer for manufacturing bellows

Abstract: A laser welding apparatus is for laser welding an inner joint between first and second bellows diaphragms. The apparatus preferably includes a first clamp having an opening therein and having portions adjacent the opening defining a first clamping surface; and a second clamp having portions defining a second clamping surface, and wherein the first and second clamps are relatively movable to clamp the first and second metal bellows diaphragms together between the first and second clamping surfaces so that the openings in the bellows diaphragms are generally aligned with the opening in the first clamp. The apparatus also preferably includes a laser for generating a laser beam, and a beam directing element positioned in the opening of the first clamp and the openings of the first and second bellows diaphragms for directing the laser beam to weld the inner joint between the first and second bellows diaphragms. The opening of the first clamp and the recess of the second clamp are preferably sized to expose a predetermined radially inwardly extending portion of the first and second bellows diaphragms to facilitate welding with the laser beam. In addition, the apparatus also preferably includes a rotating drive arrangement for relatively rotating the first and second clamps, and the laser beam directing means to weld the inner joint. A non-metallic spacer may be positioned between the bellows diaphragms.

Submersible pumping system utilizing a motor protector having a metal bellows

Abstract: A downhole pumping system includes a downhole pump that is coupled to a downhole motor. The downhole motor includes a motor protector that utilizes one or more retractable and extensible bellows, instead of an elastomeric bag, to accommodate motor oil contraction and expansion.

Pressure damper for a pressure vessel

Abstract: The present invention relates to a pressure damper for a pressure vessel, in particular for a fuel distributor for an internal combustion engine, with a damper bellows that is connected to a sealing cap for closing an opening of the pressure vessel. In order to obtain a pressure damper that can be installed as easily as possible and can be manufactured as inexpensively as possible, the provision is made according to the invention that the sealing cap is embodied of one piece as a deep-draw part made of metal.

Bellows for front loading washing machines

Abstract: A bellows ( 44 ) for a front loading washing machine ( 10 ) having a front panel ( 13 ) providing a first channel ( 46 ) having opposed sidewalls ( 50 ), an opening ( 19 ) and a door ( 20 ) carried thereby, and further carrying a stationary drum ( 25 ), providing a second channel ( 48 ), having opposed sidewalls ( 52 ) and a rotatable drum ( 30 ), the bellows comprising an annular body portion ( 45 ) terminating in first and second fastening means ( 54, 56 ); the first fastening means ( 54 ) provided an axially extending rib ( 65 ) having opposed first and second surfaces ( 66, 68 ) and engagable with one of the sidewalls of the first channel; and the second fastening means ( 56 ) provided an axially extending rib ( 70 ) having opposed first and second surfaces ( 74, 75 ) and engagable with one of the sidewalls of the second channel and a radially extending lip ( 80 ) engagable with the door; whereby the stationary drum is sealed to the front panel of the washing machine. A method for sealing a stationary drum ( 25 ) to the front panel ( 13 ) of a front loading washing machine is also provided.

Method and arrangement in connection with ventilator

Abstract: The invention relates to a method and arrangement in connection with a ventilator, in which fresh gas is supplied to a patient (15) and part of the patient's breathing gas is supplied to the patient with a bellows means (16) To provide a basic solution suitable for a variety of uses fresh gas is supplied to the patient (15) by means of a gas mixer (1) The fresh gas flow from the gas mixer (1) is occasionally led to drive the bellows means (16)

Crop conditioning system

Abstract: A crop conditioning system to reduce the drying time of crops. The invention generally provides a framework, a fixed roller mounted on the framework, a movable roller mounted on one or more bellows which are mounted on the framework and a source of compressed gas or air for the bellows. The invention also provides a compressible roller sleeve which reduces down time due to jamming or clogging of the rollers with slugs and other debris, which includes a compressible base mat and a plurality of platform surfaces.

Flexible tube of an exhaust pipe for motor vehicles

Abstract: This invention relates to a flexible tube of an exhaust pipe for motor vehicles. The flexible tube includes a cylindrically corrugated bellows member(10) made of metallic material; an interlock member(20) spirally formed and positioned with a prescribed gap from the bellows member(10), and for absorbing the displacements due to the various motions of the exhaust pipe; a braid member(30) for surrounding the outside of the bellows member(10); two caps(40) for pressing both end parts of the braid member(30); two ring-shaped intermediate members(50) respectively having one end fixed to the bellows member(10) and the other end fixed to be overlapped with the interlock member(20) outside of the intermediate members; and an isolating member(60) positioned in a gap between the bellows member(10) and the interlock member(20) to prevent the bellows member(10) and the interlock member(20) from directly contacting, wherein the isolating member(60) protects the bellows member(10) from abrasion and damage to prevent leakage of gas, and absorbs the extension, compression and bending displacements. Therefore, this invention can increase its lifetime.

Soil disinfecting device

Abstract: A mobile soil-disinfecting device (10) comprising a cultivating unit (20), a soil treating chamber (23), a bellows (28), a heat exchanger (56), and a heat-generating unit (26) The cultivating unit (20) comprises one or more cultivating members adapted for breaking the soil and throwing it upwardly into the soil treating chamber (23), and the heat exchanger (56) being in thermal communication with the heat generating unit (26), the bellows (28) adapted for drawing ambient air, passing the air through the heat exchanger (56) and throwing hot air into the soil treating chamber (23)

Injection device with bellowed reservoir

Abstract: Devices for injection of medicines into a human body are designed for one-time use during inpatient or outpatient treatment. The reuse of an injection device having a bellows 3 as an injection container is prevented by providing a locking attachment which prevents backward motion of a bottom 4 of the bellows 3 and which is mounted on elements of the device brought together during the injection (the bottom 4 of the bellows 3 and the housing/needle holder 1). A locking attachment is made in a form of a pair of interacting elastically deformable hooks 6 with a beveled catch and a female part in the form of a hole 7 with a ledge 8. At the instant the injection is completed, the sharpened end 10 of the needle 2 punctures a partition 9 in the bottom 4 of the bellows 3, further preventing reuse.

Anesthetic apparatus and method for operating same

Abstract: An anesthetic apparatus has a control unit and a breathing circuit with a connector for fresh gas, a bellows system and an outlet valve. The anesthetic apparatus operates at least as an open system, the connector then constituting an inspiratory part of the breathing circuit and the bellows system and outlet valve constituting an expiratory part of the breathing circuit. In order to reduce the adverse impact of compressible volume in the expiratory section on the functioning of the anesthetic apparatus, the control unit regulates the bellows system during inspiration so that a counter pressure, largely corresponding to the pressure of fresh gas at the connector, is maintained in the expiratory section of the breathing circuit.

Development of the SCRF power coupler for the APT accelerator

Abstract: The team responsible for the design of the Accelerator Production of Tritium (APT) superconducting (SC) radio frequency (RF) power coupler has developed two 700-MHz, helium gas-cooled power couplers. One has a fixed inner conductor and the other has an adjustable inner conductor (gamma prototype and alpha prototype). The power couplers will be performance tested in the near future. This paper discusses the mechanical design and fabrication techniques employed in the development of each power coupler. This includes material selection, copper coating, assembly sequences, and metal joining procedures, as well as the engineering analyses performed to determine the dynamic response of the inner conductors due to environmental excitations. A bellows is used in both prototype inner conductors in the area near the ceramic RF window, to compensate for thermal expansion and mechanical tolerance build-up. In addition, a bellows is used near the tip of the inner conductor of the alpha prototype for tuning the power coupler after it is installed on the accelerator. Extensive analytical work has been performed to determine the static loads transmitted by the bellows due to thermally induced expansion on the inner conductor and on the RF window. This paper also discusses this analysis, as well as the mechanical analysis performed to determine the final geometric shape of the bellows. Finally, a discussion of the electromagnetic analysis used to optimize the performance of the power couplers is included.

Bellows units for a chamber of a liquid-propellant rocket engine with afterburning

Abstract: A device comprises a bellows with protective rings arranged between corrugations of the bellows Support rings are connected in a sealed manner to a gas line and a combustion chamber A gimbal ring is positioned outside the bellows and via hinges is connected to structural brackets with support rings A shield is mounted inside the bellows, the shield consisting of two cylindrical envelopes telescopically inserted one in another with a gap The cylindrical envelopes are fixed in cantilever to support rings, forming a chamber which via channels for feeding a cooling working medium made in the support rings is connected to a main line for feeding the cooling working medium, and via the gap between the envelopes—to the cavity of the bellows unit A housing is arranged outside the protective rings and adjoining them, and is made in the form of a metallic cylindrical helix, the ends of which are connected to the support rings (FIG 2 )

Bellows for sealing a valve rod passage in a globe valve

Abstract: The invention relates to bellows for sealing a valve rod passage in a globe valve. Said bellows are especially configured as expansion bellows or as a corrugated pipe. They provide a reliable, hygienic and durable static seal for the connecting flange of a closing member unit in the housing of the globe valve, are resistant to the forces present and have a long enough service life. To this end, the connecting flange (40) of the closing member unit (4) has a fixing part (4f) in the area of its connection to the bellows (4b). Said fixing part absorbs the forces resulting from the deformation of the bellows (4b) caused by the globe valve and/or from the pressure in the housing (1a), essentially without producing bending moments, and is indirectly supported on the housing side. In the area of its conical sealing surface (4h), the connecting flange is reduced to a minimum wall thickness in terms of the resistance requirements, with a membrane-shaped sealing element (41). The membrane-shaped sealing element (41) has at least one pre-stressed elastic pressure ring (5) on the side which is turned away from the conical sealing surface (4h). This pressure ring (5) presses the sealing surface (4h) onto the complementary ring bearing surface (1k).

Method and apparatus for positioning a disk-shaped object

Abstract: Objects of the present invention are to prolong the life of a sealing portion by using bellows and to prevent the generation of dust and the effect thereof. A support member for positioning is extended to the outside through an opening of a vacuum vessel and bellows connected to the circumference of the opening with a play such that positioning movement can be performed without being in contact with the opening and the bellows, and the support member is received by roller bearings in a bulkhead portion connected to a free end of the bellows and closing the bellows of a bearing support. Necessary rotation is given to the support member from outside via inside and outside magnetic couplings facing each other on the inside and outside of the bulkhead portion, and movement in the X direction perpendicular to the axis is given to the support member from outside by moving the bearing support in the direction perpendicular to the axis with respect to the vacuum vessel. Thereby, a disk-shaped object is positioned without necessitating a sliding portion located in the vacuum vessel, thereby achieving the above objects.

Fuel distribution pipe

Abstract: PROBLEM TO BE SOLVED: To reduce radiation of an abnormal sound caused by the realization of high pressure of fuel control pressure, and to prevent fuel leakage by absorbing core dislocation of branch pipes and an injector SOLUTION: In a fuel distribution pipe 1 having a pipe body 2 and two or more of branch pipes 3 for inserting/connecting an injector 10, a bellows structure part 9 for showing pipe axis directional and pipe diameter directional elasticity is arranged between a base end part 7 close to the pipe body 2 of the branch pipes 3 and a tip part 8 for inserting/connecting the injector 10 The bellows structure part 9 is covered with a cylindrical wire net body 16 to restrain pipe axis directional expansive deformation of the bellows structure part 9 by fuel control pressure, and is fixed to the branch pipes 3 on both sides of the cylindrical wire net body 16 A filter noise eliminator 20 is arranged inside the branch pipes 3

Automated, air-operated bellows pumps for groundwater sampling and other applications

Abstract: An air-operated pump for groundwater sampling features a corrugated bellows as opposed to the traditional bladder used for fluid collection. The preferred embodiment includes an air-supply line and a fluid-discharge line, each coupled to the pump body through a controller disposed at an appropriate above-ground location. The bellows is operable between a refill state, wherein fluid is drawn into the pump body through the fluid inlet, and a discharge state wherein fluid is forced out of the pump body through the discharge line. An apparatus disposed within the pump body governs the air received through the air-supply line to, at least, semi-automatically cycling the bellows between the refill and the discharge states. To assist in cycling, the pump may further include one or more magnets for latching the bellows in the refill or discharge state, and an electrical sensor for detecting whether or not the bellows is latched. As an alternative, the apparatus for governing the air received through the air-supply line may include a valve in the air-supply line which is mechanically coupled to the bellows. A separate exhaust line may also be provided to expel air received through the air-supply line, in which case the apparatus for governing the air received through the air-supply line also governs the air expelled through the exhaust line.