Showing papers on "Bellows published in 1978"

Wound drainage device

Abstract: A device for removing fluids from a wound includes a housing and a passive bellows inside the housing. The bellows can be collapsed and retained in a collapsed or activated state. Upon release from its activated state, the bellows is expanded so as to provide a substantially constant level of negative pressure whereupon fluids from a wound are automatically drawn into and collected within the bellows at a substantially constant rate of suction throughout the range of evacuation. Preferably the bellows is expanded by a constant force ribbon spring which provides a constant force of expansion. Additionally, the housing is preferably transparent with graduations etched thereon permitting the visible inspection and measurement of the fluids removed from the wound.

Expanding bellows for expulsion tank

Abstract: A positive expulsion tank incorporates an expanding bladder in the form of a metal bellows, which is adapted to undergo elastic deformation during a product storage condition to provide for thermal cycling of a stored product, and plastic deformation, during a product expulsion operation to achieve high efficiency expulsion of product from the tank. Convolution crests of the bellows are internally reinforced by rings, whereby plastic deformation of the bellows is caused to occur primarily in the root areas during the expulsion operation. As a result, the root areas are displaced radially outwardly towards the wall of the tank incident to axially directed extension of the bellows to lie in essential alignment with their adjacent crests when the bellows has been fully extended to complete the expulsion operation, thereby providing for expulsion efficiencies in excess of 97 percent.

Pneumatic spring for motor vehicles

Abstract: A pneumatic spring for motor vehicles which includes two supports as well as closed spring volumes and two spring surfaces of different sizes which surfaces are subjected to pressure in opposite directions and which are variable as a function of road clearance. The surfaces are supported coaxially against one another with the spring volume being formed by two roll bellows defining a common chamber. Effective spring surfaces of the bellows facing away from each other are supported upon spring pistons of different diameters which are connected together. The spring pistons and a casing associated with the roll bellows form the two supports.

Apparatus for transferring flowable materials from a first vessel into a second vessel

Abstract: Apparatus for transferring pulverulent or granular material from an opening at the lower end of a silo into a vessel which is moved to a position below such opening has a vertical duct with a rigid upper section which is affixed to the silo, a rigid lower section which is surrounded by and is rigidly connected to a downwardly tapering funnel and serves to discharge flowable material into the vessel by way of an opening in the top wall of the vessel, and a bellows which is disposed between and is separably connected with the two rigid sections. The lower section and the funnel are movable up and down by means of a winch and several cables or chains whose lower end portions are attached to the funnel and/or to the lower section. A cover which normally overlies the open upper side of the funnel is movable to a raised position in which it surrounds the upper section of the duct. This provides room for insertion of an outer bellows whose lower end portion is sealingly connectable with the upper end portion of the funnel and whose upper end portion is connectable with the marginal portion of the cover. Air which is expelled from the vessel flows between the funnel and the lower section of the duct in the lower position of the cover; such air escapes by way of a pipe on the cover. When the cover is raised and the outer bellows surrounds the bellows of the duct, the compartment admits air into the annular space between the two bellows, and the air again escapes by way of the aforementioned pipe on the cover.

Volume limiting ventilator

Abstract: A volume limiting ventilator having a sequencing servo for switching from an inhalation phase to an exhalation phase in its operative cycle. A bellows mounted in a container is provided for receiving gas from a source of gas under pressure. A master venturi is in communication with the interior of the bellows and the exterior of the bellows. A large air breathing tube forming a part of a breathing circuit connects the interior of the bellows to a patient adapter. A master flow cartridge controlled by the sequencing servosupplies source gas to the master venturi. A transfer valve assembly is provided for determining whether the gas flows straight through to the breathing circuit or alternatively is supplied to the container carrying the bellows to raise the bellows. The transfer valve assembly controls the transfer of gas in the container from the exterior of the bellows to the interior of the bellows. A volume stabilizer is provided for stabilizing the volumes between the interior of the bellows and the exterior of the bellows at the termination of the inspiratory phase. An expiratory nebulization cartridge is provided for supplying expiratory nebulization.

Seal assembly and method for providing a seal in a rotary kiln

Abstract: A seal assembly and method for providing a contaminant-free, fluid-tight seal in a rotary kiln or similar rotating apparatus. A seal is provided between the rotating surfaces and the stationary surfaces of the kiln by providing an annular seal chamber defined by a rotating, outwardly-facing, U-shaped annular rim integral with the rotating surfaces of the rotary kiln and a stationary bellows chamber assembly integral with the stationary surfaces of the rotary kiln. An effective seal is maintained between the bellows chamber assembly and the annular rim by injecting a pressurized fluid into the bellows chamber so as to sufficiently bias its surfaces outwardly against the surfaces of the annular rim. The annular seal chamber is separated from the kiln chamber and its fluids and contaminants by an annular isolating chamber. The bellows chamber assembly prevents fluid communication between the seal chamber and the isolating chamber. The isolating chamber may communicate with the fluids of the kiln chamber via a one-way flap valve, and fluid is injected into the isolating chamber at a pressure sufficient to cause the injected fluid to flow from the isolating chamber, through the one-way valve and into the kiln chamber so as to prevent the flow of kiln fluids and contaminants into the isolating chamber.

Educational lung simulator

Abstract: In a preferred embodiment, there is provided a substantially rigid and self-supporting housing divided into two separate chambers and chamber spaces thereof each having mounted therein a separate lung-simulating flexible non-resilient enclosure structure and enclosure space thereof isolated from fluid flow communication with the chamber spaces, with the respective enclosure spaces being in flow communication with each other through an interconnecting conduit having mounted within conduit space a tube having an inflatable balloon mounted therearound adapted for inflation and deflation from an exterior location exterior to the interconnecting conduit, and each of the chamber spaces having a bellows mounted in flow communication with chamber space thereof with the bellows mounted above the flexible non-resilient enclosure structure within that chamber space, and a portion of each wall of the respective two separate chambers being flexible and in flow contact with exterior bellow and space thereof adapted to jointly increase pressure against the flexible portion of each of the separate chamber spaces concurrently by collapse of the exterior bellows and to jointly decrease pressure by expansion of the exterior bellows, and including on each flexible non-resilient enclosure structure on non-opposing walls thereof a multiplicity of mass elements positioned and adapted to exert pressure by gravitational force upon enclosure space as the flexible non-resilient enclosure structure is positioned in different positions.

Compressor heat pump system with maximum and minimum evaporator ΔT control

Abstract: An air source heat pump system incorporating a refrigerant charged bulb within the air flow passing over the outdoor coil of the heat pump system to sense outside ambient air temperature. The refrigerant charged bulb supplies a variable saturated pressure which acts upon a bellows of a control unit whose opposite side is subjected via a second bellows to saturated suction pressure (corresponding to refrigerant evaporating temperature) of the refrigerant returning from the outdoor coil to the inlet of the compressor. The bellows provides a spring load. An electrical switching device responsive to this pressure differential acts to first block unnecessary loading of the compressor and secondly to initiate unloading of the compressor. Additional switching means prevents excessive unloading of the compressor and insures subsequent initiation of loading to prevent liquid logging of the evaporator coil.

Bakable aluminium vacuum chamber and bellows with an aluminum flange and metal seal for ultrahigh vacuum

Abstract: A bakable (200°C) aluminium alloy vacuum chamber and bellows (6063‐T6) with an aluminium alloy (2219‐T87) flange and metal seal (Helicoflex‐HN: aluminium O‐ring) has been constructed. Such components may be used in the assemblies of the vacuum chambers in proton synchrotrons and electron storage rings.

Manually operated liquid dispensers

Abstract: A manually operated dispensing device for a container holding a quantity of liquid is disclosed. The device has a variable volume pump chamber within a component retaining body. The chamber is defined by a bellows having a closed end or bottom, an open end or top, and corrugated sidewalls characterized by their resilience or elastic memory, and fabricated of any of the various thermoplastics. The bellows is associated with a movable member in the form of a trigger which when actuated compressively stresses the bellows in a direction significantly to reduce its length and the volume of the chamber therewithin. When the compression stress applied by the actuating member or trigger is relieved or removed, the bellows regains its original size and shape and returns the actuating member to its initial position. Associated inlet and outlet valves and respective conduits are also incorporated in the device whereby liquid in the liquid container is drawn into the chamber and pumped through a discharge nozzle in the form of a spray, as desired. The alternate application and relief of compressive stress by the trigger or operating member also opens and closes the valves so that liquid can be drawn into the chamber and dispensed therefrom.

Non-invasive, pressure sensor apparatus for communicating pressure inside a body to the exterior thereof

Abstract: A pressure sensor for indicating pressure in the animal or human body, such as intracranial pressure, including a housing, a bellows contained within the housing, a body pressure sensing tambour for placing the bellows in communication with pressure in the body so that the pressure will cause the bellows to move as a function of the pressure, output means, such as a radioactive source and associated shielding, contained within the housing and associated with the bellows for providing an output which is a function of the movement of the bellows, and a receiver, such as a radiation detector, located external to the body to receive the output and provide data indicative of the pressure in the body. The pressure sensor includes means associated with the bellows to enable in vivo calibration of the pressure sensor after implantation by establishing a preselected output condition during calibration. An ambient pressure sensing tambour is associated with the bellows for compensating for ambient pressure variations. The bellows is resilient, made of a material which has essentially 100% memory of position and has particular critical dimensions in order to provide linear movement in response to the range of pressures to be monitored, and to provide a sufficient movement, or deflection, in order to provide a sufficient readout. The bellows has a spring rate which is substantially greater than the spring rate of the pressure sensing and ambient pressure compensating tambours thereby making the pressure sensor essentially insensitive to temperature variations.

Vibration absorbing connector

Abstract: Vibration absorbing connector for use in high pressure fluid piping systems such as the refrigerant lines in an automotive air conditioning system incorporates a thin bellows member whose ends are restrained against axial movement by a restraining means such as a plurality of axially extending flexible cables or a braided metal sleeve which surrounds the bellows member. A molded-in-place elastomeric layer fills in the external bellows corrugations to prevent their deformation under load and encapsulates the restraining means. The design permits a 3 inch long bellows having a 0.005" wall thickness to perform as well as a 7 inch long bellows having a 0.020" wall which has a conventional configuration under internal fluid pressures that would collapse the thin wall bellows corrugations in the absence of the elastomeric layer.

Aquarium crib toy

Abstract: An amusement device for infants, babies and small children, especially intended to be mounted to a side wall of a crib. The device includes a transparent enclosure which in practice is filled with a liquid, and which contains at least one movable object such as a sphere or a simulation of a fish. The density of the object or objects is greater than the density of the liquid. A flexible resilient bellows extends from the lower end of the enclosure and a liquid transmission pipe or nozzle extends between the enclosure and the bellows. The bellows may be manually expanded by the infant or child, so that a body of the liquid is drawn from the enclosure into the bellows. A spring extends from the bellows to a lower fixed mounting, so that when the bellows is manually expanded, the spring is compressed against the lower fixed mounting and urges the bellows to an idle contracted shape, so that liquid is expelled from the bellows into the enclosure when the child releases the bellows expansion element. Thus, the expelled liquid agitates and circulates the liquid in the enclosure, so that the object or objects in the enclosure move about within the body of liquid in the enclosure in a manner pleasing and amusing to the child, baby or infant, who can readily see the motion of the objects through the transparent wall of the enclosure.

Sealed enclosing system for coupling an optoelectronic device and an optical fibre

Abstract: A sealed enclosing system for coupling an emitting or receiving optoelectronic device with an optical fibre. A metal cap has an optical fibre passing therethrough in a sealed manner. A bellows tube is mounted on a base and thus provides an elastic element for connecting the fibre to an optoelectronic diode mounted on the tube. The seal is completed by a welding of the cap to the base and by passing electric supply connections through the passage ways formed by glass beads.

Wheeled vehicle axle suspension system

Abstract: The wheel hub cavity is used to accommodate a portion of the air bellows in an axle suspension of either the single or tandem drive axle type enabling the air bellows to be located directly over the axle and under the frame. The resulting lightweight, high load carrying capacity structure includes control arms for aligning and stabilizing the suspension and air bellows at both ends of the axle, adjacent the axle housing and extending outboard into the wheel hub cavity.

Smoking substitute using aromatic substances - consists of tube with mouthpiece, impregnated plug for flavour, and throttle or valve controlling suction

Abstract: A substitute for smoking is provided by a tube (1) fitted with a mouthpiece (3) one end, and into the other end of which a porous plug (6) can be inserted. The plug is impregnated with a substance which gives off a vapour having a certain flavour when air is drawn through from the mouthpiece. To give the correct suction, a throttle (8) can be housed inside the tube. In another design, a bellows type valve is incorporated to give the correct suction. Further designs include side suction openings whose size can be varied. These can be positioned near the bellows valve.

Device for moving the pickups of a flaw detection system through a pipeline

Abstract: The disclosed device comprises two support end assemblies formed as cup-shaped sleeves adapted to be alternatingly engaged with the internal surface of a pipeline and interconnected by a motion member. The lateral surface of each sleeve defines and annular chamber with an elastic sheath thereby. The two sleeves are interconnected by a bellows fixed between the bottoms of the sleeves. The annular chambers and the bellows are connected to an air-compressor through an automatic control system arranged so that at the initial stage of a successive advancing step the leading chamber communicates with the ambient atmosphere, while the trailing chamber and the bellows are communicated to the pressure connection of the compressor, whereas at the final stage of the step the trailing chamber and the bellows are communicated with the suction connection of the compressor, while the leading chamber is under pressure.

Device in dental suction apparatus for connecting and holding suction nozzle tubes and/or for filtering

Abstract: Dental suction apparatus is a modular construction, made up of a plurality of modules joined fluid-tight side-by side. A main suction duct extends through all of the modules. At least two of the modules have connection for suction hoses each having a suction nozzle, holders being provided on the modules for holding the suction nozzles when not in use. At least one module has a filter chamber connected between a suction tube and the main suction duct. A removable filter unit in the filter chamber has a basket-shaped filter on a stem by means of which the filter can be removed through on opening closed by a hinged cover. A cap on the stem provides a seal for the filter chamber. Flow of air from the suction tube of each suction tube module to the main suction duct is controlled by a valve in the form of a bellows provided with a telescopic guide and with a control valve for controlling the expansion and contraction of the bellows by differential pressure.

Flexible bellows end connection in a marine stern drive

Abstract: A flexible bellows assembly covers the universal drive coupling connecting between a marine stern drive unit and the inboard engine. The flexible bellows includes a rectangular bead at the periphery of one end and is tubular shaped at the other end. The tubular shaped end is sealably clamped over a projecting portion of the transom bracket and the rectangular bead end is sealably contained within a clamping chamber formed by complimentary portions of the stern drive unit housing and the bell housing portion of the pivot mounting assembly.

Air cleaner with valve means for preventing fuel vapor escape

Abstract: An air cleaner for use on internal combustion engines is provided with a bellows valve which is located on the clean side of the filter and blocks the outlet to the carburetor when the engine is not operating to prevent fuel vapor escape and is aspirated by a source of vacuum during engine operation to retract to an open position permitting free filtered air flow to the carburetor.

Sealing device for shaft

Abstract: The sealing oil in a sealing device for an underwater propeller shaft as maintained at the optimum operating pressure by providing a pressure increasing device in which an oil chamber communicating with the sealing oil and a sea water chamber communicating with the sea water in the vicinity of the propeller shaft are separated by a movable member, e.g., a bellows.

Pneumatic spring, especially for vehicles

Abstract: A pneumatic spring for vehicles which spring includes two supports as well as at least one closed spring volume and two differently sized spring areas which are subjected to a pressure acting in opposite directions. The two spring surfaces are separated from one another and are variable in size as a function of the travel of the pneumatic spring, two roll bellows are arranged in a casing of the pneumatic spring with opposite spring surfaces of the bellows being supported upon connected spring pistons. The supports are formed, on the one hand, by the spring pistons and, on the other hand, by a casing associated with the walls of the roll bellows. Partial volumes are defined by the roll bellows with the partial volumes being separated from one another so as to maintain the respective volumes essentially independent of the travel of the pneumatic spring.

Bellows permitting twisting movement

Abstract: A bellows which is made up of a plurality of coaxially joined bellows elements each having a plurality of n parallelogram-shaped wall elements of thin plate material joined together and positioned around a common center axis. The upper and lower edges of the thus joined wall elements define spaced parallel congruent planar orthopolygonal shapes each having n sides, n being equal to or greater than 3. Each of the orthopolygonal shapes in angularly offset in a direction around the central axis from the next adjacent orthopolygonal shape. The wall elements each have a fold line between the diagonally opposite vertexes which are the farthest apart. The bellows can have a further bellows with an axial cross-sectional shape in the form of waves joined coaxially thereto.

Optical fiber coupler

Abstract: PURPOSE:To render a precision working to be useless and an optical axis and its end face to coincide correctly by inserting an optical fiber into a void hole in the middle of bellows, and deforming the bellows in the radial direction with an equal pressure in the axial direction of the optical fiber due to the pressure of liquid.

Rotary bellows seal with vibration-damping means

Abstract: A split-ring radially expandable under centrifugal force for damping vibrations of a rotary annular bellows by pressing against the inner surfaces of at least some of the convolutions of the bellows as the speed of the bellows increases. Preferably, the split-ring is positioned in a channel for rotation with the bellows and for radial expansion as a function of the rotary movement, while restrained from axial movement with respect to the bellows.

Bellows neck squeeze fluid dispenser

Abstract: A manually actuatable fluid dispenser comprises a plastic bottle container which includes an upstanding bottle neck portion having a flexible bellows formed integrally on one side thereof operable by a reciprocal trigger member which engages the bellows through a trigger spring for exerting a sustained but limited force on the bellows, and reaction force on the trigger member, over extensive trigger actuation travel and speed. The upper end of the cylindrical neck of the container is closed by a dispenser body which includes a fluid passage having a check valve disposed therein for controlling the flow of fluid in the fluid passage. A fluid tube disposed in the bottle neck includes a seal for fluid isolation of the bottle neck from the bottle, and a check valve for allowing flow of fluid from the bottle into the bottle neck.

Capsule for cooling semiconductor chips

Abstract: In einer Kapselanordnung zum Kuhlen von Halbleiterchips (10) ist auf jedem Chip (10) ein warmeabfuhrender Bolzen (22) positioniert. In a capsule arrangement for cooling of semiconductor chips (10) is positioned on each chip (10) a heat dissipating pin (22). Der Bolzen (22) verlauft innerhalb eines federnden Balges (21). The bolt (22) extends inside of a resilient bellows (21). Das chipfeme Ende des Balges (21) ist in einer Aussparung (20) der Kapselanordnung fixiert. The chipfeme end of the bellows (21) is fixed in a recess (20) of the capsule assembly. Zwischen den Chips (10) und dem Raum ausserhalb des Balges (21), ist ein Kuhlmittel I und innerhalb des Balges (21) ist ein weiteres Kuhlmittel II vorgesehen. Between the chip (10) and the space outside of the bellows (21) is a refrigerant I and within the bellows (21) is provided a further coolant II. Beide Kuhlmittel I und II konnen gleich sein, vorzugsweise flussiges Helium oder ungleich sein, wenn der Raum innerhalb des Balges (21) an ein Kuhlflussigkeitssystem angeschlossen ist, welches von dem Kuhlmittel I ausserhalb des Balges separiert ist. Both coolant I and II may be the same, preferably liquid helium or unequal, when the space within the bellows (21) is connected to a coolant system which is separated from the coolant I outside of the bellows.

Hydraulic shock absorbing arrangement for pipe conduit systems

Abstract: Hydraulic shock absorbing arrangement for pipe conduit systems including a piston slidably mounted in a liquid-filled cylinder to define spaced chambers. The piston has a rod connected thereto which is slidable in a guide positioned at one end of the cylinder. The piston rod is surrounded by a sealing bellows which is secured in a liquid-tight manner at one end to the piston and at its other end to the guide. The cylinder is mounted on a stationary bearing, while the piston rod is connected to a pipe in which shocks are to be damped. A throttling valve communicates with each cylinder chamber, the latter chambers communicating with each other through an overflow path. An expandable compensation bellows communicates with the atmosphere through an air outlet opening, but is otherwise closed.

Expansion bellows pipe coupling - has bending loads absorbed by protective external bellow housing

Abstract: An expansion bellows (4) which joins two coaxial tube ends (1, 2) is welded to the tubes by two location rings (5, 6). The tube ends are provided with a short internal taper on one tube (3) and an external taper on the other one, in order to partially overlap. A cylindrical housing (8) located concentric with the tubes, protects the outside of the bellow installation. One end flange of the housing is welded to one tube. The opposite housing flange has a clearance hole (9) for the other tube (2), thus any bending load on the pipe coupling is absorbed by the housing assembly (8).

Bellows sections welder

Abstract: The bellows sections welder according to the invention comprises a bed carrying a stationary support and a movable support with a driver chuck and a driven chuck, respectively, which chucks are kinematically interconnected. The bed further carries a welding torch and a yoke disposed between the chucks and intended for centering the ends of bellows sections being welded. The movable support is driven by at least two pneumatic cylinders symmetrically arranged with respect to the longitudinal axis of the welder. Viewed in the direction of the work movement, the movable support is preceded by adjustable stops and followed by a means to receive welded bellows sections.