Showing papers on "Bellows published in 1981"

Aircraft engine lifting and positioning apparatus

Abstract: A lifting and positioning apparatus particularly suited for use in the installation of wing-mounted airplane engines includes superposed upper and lower load-bearing support platforms that are connected to one another by means of a jack mechanism operable to raise and lower the upper platform while supported by the lower platform. The lower platform includes and is movably supportable on fluid cushion bearings. The upper platform supports a plurality of resilient elastomeric elevator bellows that are positioned and adapted to receive and support a heavy object, such as an aircraft engine, while cushioned against application of excessive lifting force. The bellows are independently inflatable and deflatable to effect raising and lowering of selected portions of the aircraft engine and thereby rotate the engine to desired angular orientations. Alternatively, the bellows may be actuated conjointly to effect uniform vertical raising or lowering of the aircraft engine. In operation, the combination of the fluid cushion bearings supporting the lower platform and the elevator bellows on the upper platform enables rotation of the aircraft engine with three degrees of freedom so as to obtain any desired angular orientation for installation. Once the desired angular orientation is obtained, the engine may be raised vertically, first by the jack mechanisms and then by actuating the elevator bellows in unison. The elastomeric bellows and the fluid cushion bearings limit the amount of force that can be applied to the engine during rotation and lifting. The aircraft engine can thus be raised and positioned with a desired angular orientation for mounting without danger of excessive forces being applied to the various attachment members that connect the engine to the airplane wing.

Apparatus for making a coffee beverage

Abstract: Apparatus for enclosing a filter bag, filled with a portion of coffee provided with a cup, a bellows member formed beneath the cup and separated by a perforated wall, the coffee portion being inserted within the bellows.

Convenient fast pulsed molecular beam valve

Abstract: We describe a fast electromagnetic valve for generation of a pulsed supersonic molecular beam. The valve produces 70 μs pulses with typical intensities in the neighborhood of 1×1022 molecules sr−1 s−1 at frequencies to 35 Hz. It is triggered by a low voltage–low current pulsed power supply which activates externally‐mounted coils, minimizing problems of heat dissipation and electrical and magnetic interference. It also features a corrosion resistant gas reservoir isolated from the driving mechanism by a stainless steel bellows.

Non-invasive continuous blood pressure meter.

Abstract: A non-invasive continuous blood pressure meter that reproduces the arterial blood pressure waveform, comprising an inflatable flexible finger cuff (2) which incorporates an infrared transmitter (3) and receiver (5), and electronic circuitry (20) connected to the transmitter and receiver and controlling a dynamic compressor (18). The dynamic compressor (18) comprises a bellows (10) which is compressed by a linear motor (8), electrically activated by the electronics (20). The bellows (10) is connected to the inflatable cuff (2) by a flexible tube (14), to which is also attached an electronic pressure transducer (15), in such a way that the hollow spaces of the bellows (10), tubing (14), electronic pressure transducer (15), and cuff (2), form one complete closed air-filled space. When the inflatable cuff (2) is wound around the finger (1) and the electronics (20) are properly adjusted, the signal from the electronic pressure transducer (15) will very nearly correspond to instantaneous arterial blood pressure.

Submersible pump seal section with multiple bellows

Abstract: A seal section for a submersible pump assembly has multiple seal chambers, each with an independent bellows. The seal section is located between the motor and the pump, and receives a shaft driven by the motor. At least one partition is located in the seal section, with the shaft sealingly passing through the partition. The partition divides the motor and seal sections into a primary chamber and at least one secondary chamber. A primary bellows is located in the primary chamber. The bellows is in contact with well fluid on one side and lubricant of the pump assembly on the other side for equalizing pressure. A secondary bellows is located in the seal section with one side in contact with the lubricant in the primary chamber and the other side in contact with the lubricant in the secondary chamber. The secondary bellows equalizes the pressures between the two chambers. A check valve in the partition allows fluid to flow from the primary chamber to the secondary chamber for replenishment, but prevents fluid flow in the opposite direction.

Hydraulic bearing support

Abstract: A two chambered support for a bearing, shaft or mounting which dampens vibration by hydraulic movement against a diaphragm and a flexible bellows is described.

Vibration damping apparatus

Abstract: A cryogenic vacuum pump has an expander module suspended from the vacuum chamber of an electron microscope by a metal bellows which dampens the vibrations transmitted to the electron microscope from the expander module. A weight mounted on the expander module and disposed around the bellows counters the lifting force of the atmospheric pressure acting on the expander module and protects the bellows. The expander module is maintained in a centered position by vibration damping isolators disposed symmetrically around the expander module and which are attached to a support extending down from the vacuum housing. In one embodiment the isolators are bar magnets which repel magnetic ring attached to the expander module. In another embodiment the isolators are ladders in which the rungs are wire cables tensioned between a side members attached respectively to the expander module and to the support. The compressor of the cryogenic vacuum pump is a separate unit having a high pressure feed line and a low pressure return line which are connected to the inlet and outlet of the expander module by helical flexible hoses having freely suspended turns which damp the vibrations transmitted by the hoses.

Bellows-type spring seal

Abstract: A bellows-type spring seal has a flexible bellows with an upper sealing end adapted to mate with a bell housing of an air intake pipe. The seal provides an effective breakaway joint when the cab is tilted forward from over the engine. A means, such as coil springs, encircles the bellows to push upon the underside of the sealing end of the bellows to provide a positive preload sealing force. The seal is self-aligning in the vertical and horizontal planes to accommodate cab rocking and minor misalignment in manufacture of the truck.

Artificial erection device

Abstract: A semi-rigid annular ring having individual expandable chambers on the internal wall that are distended separately by fluid pressure. A multi-port flexible conduit connected to the ring having individual ports for each chamber. Fluid pressure is supplied through the conduit manually by a bulb or electrically by a pump through a circular valve plate allowing the chambers to expand and contract in linear sequence. When a penis is placed into the ring and fluid pressure is applied, blood is forced to the end of the organ through the successive expansion and contraction of the bellows in wave fashion mechanically creating an erect condition of the organ.

Engine mounting for automobile

Abstract: An engine mounting for suspending an engine relative to a vehicle structure. The engine mounting comprises a first armature for connection to the engine and a second armature for connection to the vehicle structure and a bellows (12) interposed between the first and second armatures to define therewith a closed enclosure. The closed enclosure is filled with pressurized gas. An inertia mass (34) is mounted on the bellows. A mass of the inertia mass and an apparent spring constant of the bellows are selected such that the inertia mass vibrates in inverse phase relastionship with the phase of vibration of the first armature when the engine operates within a vibration insulated domain. The engine mounting comprises partition plates (50, 52) within the bellows to divide the interior of the bellows into two chambers which are communicated with each other through passage means. The passage means are variable in its effective area depending upon the amplitudes of vibrations of the bellows. The effective area of the passage means is decreased during vibrations of the bellows with large amplitudes, while, the effective area of the passage means is decreased during vibrations of the bellows with small amplitudes.

Engine mounting for suspending engine relative to vehicle structure

Abstract: An engine mounting for suspending an engine relative to a vehicle structure. The engine mounting comprises a first armature for connection to the engine and a second armature for connection to the vehcile structure and a bellows interposed between the first and second armature to define therewith a closed enclosure. The closed enclosure is filled with pressurized gas. An inertia mass is mounted on the bellows. A mass of the inertia mass and an apparent spring constant of the bellows are selected such that the inertia mass vibrates in inverse phase relationship with the phase of vibration of the first armature when the engine operates within a vibration insulated domain.

Below motor pressure compensation system for submersible pump

Abstract: A submersible pump assembly has pressure compensator features to avoid negative pressure at the top of the tool during installation. The submersible pump assembly has an electric motor contained within a lubricant filled motor chamber below a pump. A pressure compensator chamber is located below the motor chamber and separated by a partition. The pressure compensator chamber is also filled with lubricant. A passage bypasses the partition and leads to the motor chamber above the motor. A bellows is mounted in the pressure compensator chamber with its mouth facing upwardly. A port extends from the exterior of the pressure compensator chamber to the interior of the bellows for admitting well fluid. Also, the bellows may be filled with a heavy fluid during installation so as to retard contraction of the bellows if the tool is suddenly jerked to a stop. The bypass passage is not required in this embodiment.

Liquid level system

Abstract: A liquid level system employs a pair of vertically spaced sensors in a tank such as a boiler. Each sensor includes a pair of bellows. The first bellows is enclosed by a protective enclosure while the second bellows is exposed to the interior of the tank. The first bellows of the two sensors are interconnected and filled with a liquid forming substance, such as an alkali metal, which is in liquid phase at high temperatures, while the second bellows of each sensor and the enclosure for the first bellows are interconnected and filled with a second liquid-forming substance, such as a metal alloy, which is essentially inert. A transducer is connected to one of the second bellows which produces an electrical output signal proportional to the difference between the pressures at the locations of the second bellows and, thus, the level of liquid in the tank.

Self-damping bellows seal assembly

Abstract: A self-damping bellows seal assembly for providing a seal between a rotatable shaft and a stationary member through which the shaft extends. The assembly includes a flexible bellows surrounding the shaft and secured at one end thereto. An annular face seal is fixed and sealed to the other end of the bellows and is biased by the bellows into sealing engagement with the stationary member. The means which secures and seals the face seal to the bellows includes a flexible member which closely surrounds the shaft and dampens vibrations induced in the bellows. The bellows seal assembly includes stamped sheet-metal parts and can be used when the assembly is to be secured to the stationary member and the face seal to engage a radial face on the shaft.

Bellows actuated foam dispenser

Abstract: A vertical container has first and second spaced apart horizontal openings and is otherwise sealed The container has a hollow chamber communicating with the first and second openings The chamber is adapted to be partially filled with liquid The maximum level of fill is disposed below both openings The region between the liquid level and the openings is air filled A first device is secured and sealed to the first opening and includes a manually operable bellows disposed above the first opening The bellows has compressed and released positions A second device is secured and sealed to the second opening and includes a discharge orifice A vertical dip tube open at both ends is disposed in the container The top end of the tube is disposed adjacent the second opening The bottom end of the tube is adjacent but spaced above the botton of the container An air-liquid mixer disposed in the second opening in the region is coupled between the second means the top end of the tube The mixer, when the bellows is in compressed position, mixes air with liquid expelled from tube to produce foam which is discharged through the orifice Ambient air is drawn through the orifice into the region to replace the liquid expelled when the bellows returns from compressed position to released position

Filter or tool-changing device for screw extruders

Abstract: In a screw extrusion device used for extruding plastics materials, a filter or tool-carrier is disposed at the downstream or outlet end of the extruder, an annular pressure element bearing on the carrier so as to secure and seal the carrier in its operative position The carrier is displaceable perpendicularly to the flowpath of the plastics material so as to permit facile changing of the filter element The annular pressure element is acted upon by hydraulic fluid, the hydraulic circuit including an annular pressure chamber The inner and outer walls of the chamber are formed, respectively, by concentric metal bellows One end of each bellows is mounted on the pressure element and the other end thereof on a housing

Liquid sealed vibrooisolating device

Abstract: PURPOSE:To improve the damping action of low frequency-large amplitude vibration and the absorption of high frequency-small amplitude vibration in the above described device used for supporting a vehicle engine, by constituting one of the two fluid chambers in the device with a bellows further having a weight member and the other one of the chambers with an elastic body thin film partially in its wall side CONSTITUTION:The vibration of low frequency-large amplitude acted between support parts 1, 4 causes a deformation in an engine support member 8, then fluid flows from the first fluid chamber 9a into the second fluid chamber 9b to damp the vibration Here because the fluid chamber 9b is constituted by a bellows 7 into which a weight member 70 is buried, a large amount of fluid can flow into the chamber to obtain a good effect of damping operation in cooperation with the inertia force of the weight member 70 While the vibration of high frequency-small amplitude is absorbed by both the support member 1 and a thin film part 81, and the fluid is never circulated through a throttling hole 6 In this way, performances for damping the vibration of low frequency-large amplitude and absorbing the vibration of high frequency-small amplitude can be improved

Dispenser for pasty substances

Abstract: A dispenser for pasty substances with a housing having a piston displaceable only in a discharging direction and an outer operating handle which is formed at a headpiece, compressible in a bellows-like manner in the direction of the piston, which headpiece has a dispenser-outlet opening. A tubule with an inner open end in every position of the bellows immersed in the pasty substance, extends inwardly from the dispenser-outlet opening.

Dual fuel system

Abstract: A dual fuel system for use with internal combustion engines comprising a manually actuated dual fluid valve which alternatively supplies gasoline to the engine's carburetor or engine intake manifold vacuum to a single-stage liquified gas to gaseous fuel converter having a liquified fuel inlet valve actuated in response to intake manifold vacuum by a diaphragm of substantially the same diameter as a second diaphragm which actuates a valve to a converter gaseous expansion chamber where desired gaseous pressure is maintained and is automatically reduced during cruise conditions by compression of a bellows which acts on the second diaphragm in response to reduced engine intake manifold pressure during such cruise conditions, and a pressurized gaseous fuel and air mixer having a plunger structure responsive to venturi vacuum which meters air flow and actuates a valve needle to meter fuel flow. One alternative preferred embodiment of the mixer employs a relatively large piston which travels a relatively short distance within a cylinder and meters flow of air between the lower surface of the piston and a coaxial annular surface defining a passage into which air flows between such surface and the piston together with fuel, which fuel flows into the fuel and air passage through the piston and through a fuel transfer tube that acts as a piston guide. A second alternative preferred embodiment of the mixer utilizes a smaller diameter piston which travels a relatively long distance and a substantially oval plunger which projects into a substantially rectangular air passage to meter air flow.

High vacuum compatible air bearing stage

Abstract: A high vacuum compatible X-Y positioning stage having an air bearing is provided. A pair of moveable carriages is mounted interior to an airtight chamber. Constraints allow movement of each carriage to only one horizontal direction, the directions of each carriage being orthogonal. Air inlet and outlet ports enter the chamber through apertures, and are mounted on the carriages and are moveable therewith. Airtight, flexible bellows form an airtight seal between the chamber and air ports at the apertures. Pressurized air communicated through the ports to the carriage is constrained to exit the carriage via small orifices about the exterior thereof to form an air bearing. The air is constrained to exit the airtight chamber through a passageway mounted in the carriage and leading to the outlet port. A stage is mounted on one pair of ports. The other pair is mounted in a fixed position. The stage is moveable in an X-Y plane vis-a-vis the fixed position on a compensated air bearing.

Fluid-handling apparatus

Abstract: A filling device for cartons comprises a row of vertical ducts arranged along a path of the cartons. Each duct includes, progressing downwardly, an upper bellows, a ducting section incorporating an inlet valve, a lower bellows, and a fixed nozzle incorporating an outlet valve. The section is vertically reciprocated by a ram. The nozzle comprises a tubular housing containing a valve member comprising a closure part co-operating with a valve seat at the lower extremity of the housing, a stem, and a driving part of inverted cup shape fixedly received with clearance on the stem and movably received with clearance in the housing.

Mechanical face seals with special bellows

Abstract: A mechanical face seal adapted to withstand a pressure differential across its sealing faces, includes a bellows unit of monolithic construction, comprising a plurality of corrugations, the crowns of the convolutions directed towards the high pressure side of the seal being of greater radius of curvature than the crowns of the convolutions directed towards the low pressure side of the seal.

Method for treating radioactive material and container for enclosing such material

Abstract: A container (1) for enclosing particulate or piece-formed radioactive material (6) which shall be converted into a solid body by isostatic pressing at a high temperature and a high pressure. The container may have a corrugated sheath (2) and suitably a plane lid (4) and a plane bottom (3). The corrugation makes possible axial compression of the container (1) prior to the pressing. Instead of the corrugated sheath (2) the container may have a cylindrical sheath (side wall) and bellows projecting into the sheath and joining the sheath of the container to a lid and a bottom. The bellows make it possible to insert the lid and the bottom by gas pressure, so that the material (6) present in the container is axially compressed.

Apparatus for controlling discharge from a silo

Abstract: Apparatus for controlling discharge from a silo, comprising a device mounted internally of a discharge opening for flowable material and forming with that opening a flow path for material through the opening. A bellows actuator associated with the device moves the device relative to the discharge opening to close the opening or to open it to a desired extent. A vibrator carried by the device vibrates the device to assist flow of material through the discharge opening when it is open.

Vacuum cleaner dust container having compressing means associated therewith

Abstract: A vacuum cleaner having an air non-pervious body in the shape of a closed bellows in the suction chamber thereof with one end of the bellows bearing against the dust container, and the other end bearing against a partition separating the suction chamber from a positive pressure chamber housing the motor-fan unit. The bellows communicates with the pressure chamber through a conduit so that the bellows can be brought into communication with the positive pressure side of the fan so that the bellows expands and compresses said dust container and its contents, and thus increases the filling capacity of the dust container. The running costs of operating a vacuum cleaner is thus substantially reduced.

Bellows compensator with internal insulation

Abstract: A bellows compensator, in which the bellows (2) are protected against the effect of a hot fluid circulating inside them by a heat-insulating inner tube (7) and additional insulation (8), while maintaining the capability to absorb axial displacement movements and, in further embodiments, also to compensate for angular movements. An intermediate tube (3), which can be displaced axially, supports both the inner tube (7) as well as sliding collars (11) which engage in mating pieces (9) mounted on the end flanges, so that an overlap is produced. The parts (9 and 11) are arranged with respect to one another such that the entire expansion and compression movement of the compensator (d) can be absorbed. The intermediate tube (3) is supported on the flanges (1) via springs (4), for uniform distribution of the intermediate spaces, which absorb the displacement movement, on both ends of the compensator.

Papermaking headbox having rigid lips and actvating means

Abstract: A papermaking headbox with adjustable rigid slice lips especially adapted to permit deflection of the slice lips on a headbox utilized with a twin wire or crescent forming papermaking machine. The headbox comprises elongated slice lips extending into the forming zone located between converging papermaking wires or fabrics, the slice lips being substantially rigid in construction and affixed at their rearmost ends to headbox support members. One or both of the slice lips may be provided with a full width machined channel into which the actuating means in the form of relatively inflexible bellows are positioned. These metal bellows are in turn connected to a fluid supply means which cause a small axial movement only. The fluid supply means is adapted to supply a fluid under pressure of at least 1,000 pounds per square inch to the bellows, such that upon actuation of the bellows, the slice lip will be deformed, thereby restricting the slice opening. The full width channel provides a uniform flexure point for the adjustable slice lip.

Variable geometry centrifugal pump

Abstract: A variable breadth centrifugal pump arrangement includes two intermeshing peller sections that are mounted to a common pump shaft so that one of the impeller sections is axially moveable relative to the other impeller section. The impeller sections are rotationally interconnected by a torque transmitting member in the form of a bellows element, which may comprise an axially resilient metal tube formed with a plurality of pleats or a plurality of radially spaced pleated metal tubes that are separated by elastomeric material. Another form of torque transmitting bellows element comprises a plurality of dish-shaped element connected together at their central and peripheral edge portions.

Lung exerciser with variable resistance

Abstract: A device consisting of an adjustable volume bellows made of inexpensive materials to be used as a visual indicator and volume measurement to encourage a patient to breath deeply as an exercise is provided. Means for adding calibrated weight to vary resistance is also provided.

Collapsible salvage drum and method

Abstract: A salvage apparatus is provided which includes a bellows type drum contai. The container includes a flexible skirt which is generally tubular with top and bottom ends. The container further includes a pair of rigid plates, one of the plates being sealably mounted to the top of the skirt and the other plate being sealably being mounted to the bottom of the skirt. It is important that the lateral area of each plate substantially encompass the lateral expanded area of the respective skirt end. A plurality of controllable valves are provided for selectively opening and closing the passage of fluid. One of these valves is located in the bottom plate for selectively allowing the passage of water into or out of the container and another valve is located through the container for selectively introducing pressurized air into the container. A relief valve is also located through the container for relieving air from the container when the inside and outside differential pressure has exceeded a predetermined level.