Showing papers on "Bellows published in 1977"

Heater for heating fluid in a body cavity

Abstract: A heater for heating fluid within a body cavity of an animal say for heating tumours by irrigation, comprises a container having inlet and outlet ports through which fluid in the cavity is passed by an external pump, and a heating element in the container to heat at least some of the fluid that passes through the container. Pumping can be achieved by a fluid filled pipe coupled to the container, either directly by or by way of a diaphragm, and to a bellows or like arrangement for cyclicly varying the pressure of the fluid in the pipe and container.

Fluid operated gate valve for use with vacuum equipment

Abstract: A gate valve for use with vacuum equipment is provided in which a gate assembly is opened and closed by a fluid operated device, such as a pneumatic cylinder. The gate assembly is enclosed in a valve housing. The valve housing has aligned openings therein, and the gate assembly is moved reciprocally between the walls and parallel to the planes of the aligned openings therein, to an open position and to a closed position with respect to the openings. The gate assembly comprises two gates which are intercoupled by a bellows, the bellows defining a hermetically sealed pressure vessel with the gates. The gate assembly is coupled to a piston in the pneumatic cylinder by a piston rod. The gate assembly is moved to its closed position when pressurized fluid is introduced to one end of the pneumatic cylinder; and the gate assembly is moved to its open position when pressurized fluid is introduced to the other end of the cylinder. When the gate assembly is moved to its closed position, a valve opens within the pneumatic cylinder, and pressurized fluid from the pneumatic cylinder is caused to enter the pressure vessel between the gates. This pressurized fluid forces the gates against seats mounted on the valve housing around the respective openings therein. Metal seals are provided for the gates, in the form of layers of relatively soft metal around the gates. The valve housing itself may be evacuated to reduce pressure differential across the gate-seat junctions and minimize molecular leakage. Relief grooves are provided adjacent the edges of the gates so that the outer perimeters of the gates are relieved to be deflected when the gates are closed so as to provide a resilient stress on the gate seals. This resilient stress serves to maintain the gates in a sealed condition even in the presence of temperature changes and resulting thermal expansion and contraction.

Diaphragm type air pump

Abstract: A diaphragm is interposed between first and second housings to form first and second diaphragm chambers at both sides thereof for pumping out air in accordance with expansion and contraction of the chambers. A shaft for reciprocally moving the diaphragm is connected thereto at one end and extends through a hole formed in a bushing which is fixed to the second housing. A lever is pivotally secured to the housing to perform a pivotal movement and operatively connected at its inner end to the other end of the shaft in a lever compartment of the housing and at its outer end to an eccentric cam formed on an engine crankshaft, so that the motion of the cam is transmitted to the shaft as the reciprocal movement through the pivotal movement of the lever. A bellows is disposed in the second diaphragm chamber surrounding a portion of the shaft, wherein the upper and lower ends are respectively and air-tightly connected to the diaphragm and the bushing to form a bellows chamber. An axially extending groove is formed on either the inner surface of the hole or the outer surface of the shaft, so that the bellows chamber is communicated with the lever compartment by the groove. The compartment is communicated with an engine crankcase and thereby filled with a large amount of engine oil mist. The bellows chamber is also subjected to expansion and contraction in accordance with the reciprocal movement of the shaft to alternately draw into and force out air in the compartment, so that a portion of the mist is forcibly introduced into the groove to lubricate the shaft and the bushing.

Flexible ball joint

Abstract: The flexible ball joint is provided with a bellows which is protectively mounted inside a shell. A portion of the shell serves as the spherical socket and a portion of a sphere serves as the ball for the ball joint. The ball is mounted in the socket and is concentric therewith. One end of the bellows is attached to the shell and the other end is attached to the ball. A plurality of generally equally angularly-spaced Purbon buttons are mounted on a support ring which is mounted on the surface of the socket. These buttons are in engagement with the surface of the ball so the ball joint can pivot freely over a wide range of temperatures. A generally spherical shell-like member is mounted in fixed and closely-spaced concentric relation to the outer surface of the spherical socket to limit axial movement between the socket and the ball and hold the Purbond button on the support ring. In addition, the shell-like member has formations shaped to define cooling channels for the protective bellows.

Mold-locking device

Abstract: A mold-locking or catching device which comprises a support on one mold half or part, a bellows anchored to this support at one side of the bellows, a hook engageable with the rim of the other mold half or part and carried by the other side of the bellows and means for swinging the hook laterally into and out of engagement with the rim of the other mold half when the bellows is activated by fluid pressure or depressurized respectively.

Bellows-type mechanical seal

Abstract: A system for clamping a bellows assembly of a mechanical seal to its flange in the minimum radial and axial space which comprises the use of set screws, the threads of which are received in openings defined in part by a body flange and in part by a bellows support ring. The portion in the support ring is threaded while the remainder is not threaded. The threads in the threaded opening portion may match those of the set screw, i.e., helical, or may be merely parallel, i.e. not helical. In the latter, the arc of contact between the threads is relatively small.

Semi-automatic logsplitter

Abstract: This invention relates to a device used primarily, but not exclusively for splitting logs. The purpose of the device is to provide a means for splitting wood into a usable dimension by expanding a bellows type membrane using a low pressure medium source under a restrained log forcing it into a set of shearing blades.

Headrest for a motor vehicle

Abstract: A headrest for a motor vehicle in which an inflatable bellows forms the headrest which is provided with elastically yielding drawbands that return the bellows into its folded-together position when the bellows is deflated by withdrawing therefrom the pressure.

Vacuum-type circuit interrupter with means for protecting its bellows against mechanical damage

Abstract: A guide sleeve for the movable contact rod of a vacuum-type circuit interrupter fits within the usual tubular bellows of the interrupter. The bellows has some of its annular convolutions located axially-inwardly of the axially-inner end of the guide sleeve. A coating of self-lubricating plastic material is provided on the outer peripheral surface of the guide sleeve and on its inner end surface. This coating is sufficiently close to the internal surface of the bellows as to be contacted by said convolutions when the contact rod is axially moved during operation of the interrupter. The lubricating properties of the coating reduce friction between said convolutions and said coated sleeve.

Toy projectile launching apparatuses

Abstract: An apparatus for use in launching toy projectiles which comprises a piston or bellows having one side pneumatically connected to an operating mechanism and its opposite side arranged so as to be capable of launching a projectile from the apparatus when moved towards that projectile at a sufficient speed, the operating mechanism exhibiting a chamber whose size can be suddenly changed by squeezing, or a manual blow, or the release of a stressed spring, to alter the pneumatic pressure applied to the piston or bellows and displace it launchingly towards a projectile, the initial volume of the chamber preferably being rapidly restored to suck the piston or bellows back to substantially its initial position after each launching operation.

Sound emitting and wetting doll

Abstract: A toy doll has a mouth opening adapted to receive a simulated nursing bottle from which water is fed to the interior of the doll, some of such water producing a wetting action. The doll is also adapted to produce a burping sound when its back is patted, and simultaneously to spit up through the mouth opening some of the water previously fed from the bottle. The burping sound is produced by a bellows in the body portion of the doll which is successively compressed upon patting the back of the doll and which progressively feeds air into another bellows located in the head of the doll until the head bellows reaches an expanded position. An actuating member then automatically releases the air from the expanded head bellows, which air flows in a sudden controlled flow through a sound producing device. Some of this released air also causes liquid to be emitted from the mouth opening to produce the spitting-up effect.

Emergency oxygen supply

Abstract: A portable emergency oxygen supply which may be carried without difficulty by a user and is safe under all conditions. The supply includes a canister containing oxygen-rich gas at relatively low pressure, the canister having a normally-closed valve which is provided with an actuating switch. The valve output is coupled by a feed tube to the interior of an inflatable bellows which is attached to and communicates with a face mask whereby the user is able to repeatedly inhale and exhale the volume of gas enclosed in the bellows, in the course of which he depletes the oxygen contained therein. The oxygen in the bellows is intermittently replenished by operating the switch so that the available oxygen in the canister is fully utilized.

Child's toy and game

Abstract: A child's toy which can also be used as a game wherein a simulated landscape includes a flower or mushroom mounted on a bellows thereon and a second flower mounted thereon. The landscape includes an air channel therewithin which includes an intake valve, a passage communicating with the bellows and an outlet valve communicating with the flower. The outlet valve region of the flower includes an elastomeric washer for receiving a balloon simulating a ladybug or the like, the balloon including a nozzle for substantially airtight communication with an insertion into the washer. The sides of the balloon rest on the sides of the flower interior so that, upon inflation of the balloon by reciprocation of the bellows in standard manner, air will come into the inlet valve to the bellows and air channel and, upon contraction of the bellows, pass through the air channel and through the outlet valve into the balloon. The balloon will thereby be inflated until the force of inflation causes expansion of the balloon wall and thereby exerts a sufficient outward force against the sides of the flower to pull the nozzle out of the washer. The inflated balloon will now release the air therefrom through the nozzle and the outlet air jet will cause the balloon to be ejected further from the flower and fly away in known manner. The above described toy can be coverted into a game or utilized as a game by determining the number of depressions of the bellows required to make the balloon fly away or, alternatively by determining the distance from the toy that the balloon flies after release from the flowr.

Intraocular pressure applicator

Abstract: Disclosed is a cup-shaped bellows member removably attached to an adjustable headband. One end of the member is positioned to bear against the closed eyelid of a patient being prepared for intraocular surgery and upon whose head the headband has been placed. The opposite end of the bellows member is closed by a plate having a tubular portion communicating with the interior of the bellows portion and adapted to be connected to a means for increasing the pressure in monitored increments inside the chamber formed by the bellows and plate.

Packingless bellows seal

Abstract: Disclosed is a static seal suitable for sealing a pull rod or the like to an opening through which the rod passes into a hydraulic conduit. This static seal can be used in a wide variety of apparatus including for example spray coating guns, both electrostatic and non-electrostatic, valve assemblies and the like. Novel static sealing arrangements at each end of a non-machined extruded bellows provide packingless bellows sealing between the rod and the opening. Such a sealing arrangement is compatible with the highly desirable materials of the fluorinated hydrocarbon group, commonly known by the trade name Teflon.

Dispensing pump having bellows metering chamber

Abstract: This device for dispensing metered amounts of liquid or pasty products comprises, in a hollow body connected to a reservoir filled with the product to be dispensed, a chamber consisting of a bellows forming the delivery and suction member enclosed in a sleeve acting as a guide member to the stem of a control push member; the bellows enclosing in turn a return spring and having at its end adjacent the port connecting the reservoir to the chamber an annular reinforcement surrounding a central, normally closed inlet valve urged to its closed position by another return spring; the stem of the control push member opposite this valve, which stem is hollow and carries a head enclosing another valve for controlling the delivery of product to a dispensing nozzle, this arrangement preventing any back flow of product to the reservoir and dispensing with the conventional rigid piston and seal arrangement to eliminate leakages and extend the useful life of the device.

Blow mold for the production of bellows made of a highly elastic plastic

Abstract: A blow mold for the production of bellows of the type made of a highly elastic plastic. The blow mold is constructed from individual level-parallel disks which form the level of the outer apexes of two adjacent folds and by forming a slot from each pair of adjacent disks which ends at the outer apex and wherein the slot serves to vent air.

Molding machine with proportional dispensing

Abstract: A molding machine for dispensing at least two materials which, when combined, foam and cure within a mold thereby to form a plastic article. The dispensing is accomplished by displacing measured amounts of hydraulic fluid to a pair of chambers within each of which there is located a stainless steel bellows that is supplied with the respective material from a source thereof under pressure. When the displaced hydraulic fluid causes the bellows to collapse, the materials in the bellows are displaced therefrom into a mixing chamber in the form of high velocity jets and are mixed therein and the mixture is forced from the mixing chamber to the mold cavity to be filled. The bellows are then permitted to expand under the pressure of the material supplied thereto and the machine is ready for a further molding cycle.

Doll having viewable internal organs with manually operated bellows and pump

Abstract: A doll having internal organs of the chest and stomach cavities viewable through a transparent structure forming a part of the front of the torso, the torso being hollow and having a transverse partition therein supporting an inflatable one-piece member configured to simulate a heart and a pair of lungs, the partition also supporting coiled transparent tubing simulating abdominal cavity organs. The reverse side of the partition contains a bellows for inflating the one-piece member and pump means connected in closed-loop fluid relation with the tubing, the bellows and pump means being operable simultaneously by a depressible portion of the back of the doll torso to inflate the heart and lungs and pass fluid through the tubing.

Washing machine or spin drier drum - is provided with check-valve in waste water pipe and formed by flaps opened by water flow to prevent soap or detergent loss

Abstract: Domestic washing machine or spin drier is provided at the base of its lye drum with a bellows discharge pipe, in which is located upstream of the fluff ilter a check-valve which is formed by a pair of flexible flaps abutting one another along the diametral line, and opening under the action of flow induced by the waste water pump Flaps may be integral with the bellows pipe and closely adjacent the discharge opening in the drum Valve may be provided with one or more vent holes

Positive displacement flow through fluid pump

Abstract: A positive displacement flow through fluid pump especially useful for dispensing exact volumes of photoresist on a silicon wafer uses a bellows for the main pumping component. The bellows is capped at both ends and they include slugs which extend into the interior of the bellows to minimize the static volume. In addition, internal porting is provided in the slugs to effectively wash or purge the convolutions of the bellows which results in continuous cleaning.

Fluid pressure transducer and pressure measuring instrument including the transducer

Abstract: A fluid pressure transducer has a sealed capsule with a thin bellows wall of flexible plastics material and rigid end walls attached to a support and to an indicator respectively, so that longitudinal expansion and contraction of the capsule due to variation of the pressure of the fluid in which the capsule is immersed give an indication of this pressure. The capsule contains a gas which imparts an effective elasticity to the capsule, the elasticity of the bellows wall itself being negligible, so that the length of the capsule is to a close approximation inversely proportional to the applied pressure. For direct pressure measurement the floating end of the capsule may carry an indicator which is visible through a wall of a rigid capsule-enclosing casing to which the pressure to be measured is applied. An instrument for use as a depth gauge may incorporate the transducer, which for this application may include a calibrated flow restrictor through which fluid pressure is applied to the capsule, such that the consequent delay in the depth reading provided by the transducer indicates to a diver the length of successive decompression stops during an ascent from depth.

Laminated board press

Abstract: A device for separating the platens of a press so that wooden blanks in an unpressed form can be readily loaded therebetween. The device includes outwardly extending arms carried on the corners of each of the platens. Pneumatically operated bellows are provided between cooperating pairs of outwardly extending arms which are carried on diagonally opposite corners of each of the platens for separating the platens when pressurized. Alternate pairs of platens have pairs of bellows interposed between the outwardly extending arms carried on different diagonals. A switch is carried below the press for disengaging the pneumatic system when the press is being closed.

Bellows for sealing off the piston rod passage in an operating cylinder

Abstract: A bellows type sealing member for sealing off a piston rod opening formed at one end of an operating cylinder for accommodating reciprocal movement of a piston rod therein, in particular a diaphragm type cylinder for vehicle air-brake systems, wherein the piston rod has one end connected to a diaphragm disk and is provided at the other end with a forkhead, and the bellows can be sealingly fitted on a sleeve-like support member mounted coaxially in the piston rod opening of the diaphragm cylinder.

Mechanical seal assembly with flushing means

Abstract: A reliable, long-wearing mechanical seal for a shaft entering a vessel is prepared employing two bellows seals in tandem and providing a path for a flushing fluid between the bellows seals.

System powered damper blade assembly for use in an air conditioning system

Abstract: An air conditioning system having conditioned air supplied through at least one duct includes a damper blade assembly for varying the volume of conditioned air flow through said duct. A first inflatable bellows is connected to the damper blade assembly to vary the position thereof in said duct. The bellows is inflated in response to changes in the supply pressure of the conditioned air to maintain a substantially constant volume conditioned air flow downstream of said damper blade assembly. A second inflatable bellows is connected to the damper blade assembly for further varying the position thereof in the duct. The second inflatable bellows is inflated in response to the temperature of the air in the enclosure whereby the quantity of air discharged thereinto is reduced as the temperature of the enclosure approaches a predetermined level.

Multi-compartment container for fragile disks

Abstract: A flexible multi-compartment container is provided for the storage, handling and shipping of fragile disks such as silicon wafers used in the manufacture of integrated circuits. The container comprises a generally tubular hollow bellows section formed of identical longitudinal halves from thin sheets of pliant self-supportable plastic sheet material. Each fold of the bellows section defines an interior annular groove forming a compartment for a disk of corresponding pre-selected or standardized size. Integral with the bellows section are longitudinally flexible end spacers of a diameter greater than the diameter of the bellows section. Each end spacer includes ridges adapted to confront the interior of a rigid outer box for suppotring the bellows section therein. In particular embodiments, the end spacers include an exterior annular ridge and adjacent trough for receiving a rubber band which is used to hold the mating halves together. The annular ridges include an indentation of suitable size to accommodate the insertion of a finger beneath the rubber band in the trough in order to expedite the release of the rubber band and the opening of the container. In addition, each halve of the bellows section includes a longitudinal lip on one side margin and along the opposing side margin an integrally formed resilient longitudinal catch. The catch is formed as a longitudinal fold of an extension of the longitudinal lip. In addition, a longitudinal stiffening backbone is formed along the outer surfaces of the bellows section between the side margins to prevent sag between the end spacers.

Bellows with rotational joints

Abstract: A heat suppressor for a gas turbine engine is mounted on an aircraft by means separate from the engine mounts. A sleeve apparatus is needed to connect the exhaust duct of the engine to the suppressor duct for continuous flow of turbine gases. The sleeve apparatus is in the form of a bellows to absorb bending forces created by flexing of the air frame. This invention provides a unique connecting assembly to connect the bellows to the engine. The assembly consists of an annular socket fixed to the bellows and constructed to receive a radially extending flange on a connecting shroud fixed to the engine. The flange and socket are slidably engaged to allow twisting movement between the bellows and the engine, while the bellows allows relative displacement of the axes of the connecting passages.

Motor vehicle air spring unit - has tubular tension bolt accommodating guide bar coupled to supporting sleeve

Abstract: The motor vehicle air spring has two spring surfaces of different sizes acting in opposite directions, their area being variable dependent on spring movement and coaxially supported from each other. The chamber is formed by two enclosing roller type bellows whose working surfaces, facing away from each other, are supported on spring pistons of different dias. rigidly secured together. Distortion of their loops with spring movement result in vol. alterations counteracting each other. The spring force is transmitted via the pistons on one hand and a sleeve for the bellows walls on the other. The pistons are secured together by a central tension bolt. This bolt is a tube (307) in which an axial guide bar (343) works, coupled to the support formed by the sleeve.

Low tire pressure detector

Abstract: A low tire pressure detector and magnetic signal sending unit includes a bellows charged to a reference pressure for moving a magnet from a shielded position to a signal emitting position when tire pressure operating outside the bellows decreases to a predetermined value. A latching force is established by the magnet to operate against the bellows force to help maintain the magnet in the shielded or non-signalling position. The magnitude of the latching force is controlled by a polepiece of thin cross section which saturates under the influence of the magnet to limit the latching force to a fixed value. The spring force of the bellows is sufficient in the absence of a pressure differential to overcome the latching force and move the magnet to signalling position. A ferrous slug mounted on the movable end of the bellows is magnetically coupled to the magnet assembly to form a releasable connection between the magnet assembly and the bellows.