Showing papers on "Bellows published in 1993"

Clogged filter indicator

Abstract: A self-contained sensing unit to be mounted on air duct between the filter and blower to monitor the condition of the filter. The sensor has a probe to be inserted into the duct downstream of the filter. The probe is in fluid communication with a bellows. When the filter becomes clogged, a negative pressure in the duct actuates the bellows which in turn closes a circuit from a battery to a signaling device.

Automated sample extractor or feeder/inoculator for bioreactors and similar equipment

Abstract: An apparatus (A) can withdraw a sample from a vessel or conduit or provide a sample to this vessel or conduit. This apparatus includes a main body (10) with an inlet passage (12) and drain passage (14) both inclined relative to the body. A flexible bellows (30) is positioned within an internal cavity (3) of the main body. A sealing tip (32) of the bellows is movable by a valve operating rod (22) to close an orifice (33) to a sample cavity (11) within the body. Steam (5), pure dry air (6) and/or a wash medium (7) can be provided through the inlet passage to cleanse the apparatus Crevices and exposure to moving parts are avoided in the apparatus to prevent contamination of the sample.

Load lock chamber for vertical type heat treatment apparatus.

Abstract: The title chamber has no elevating device which requires the provision of lubricating oil which is a source of particles causing contamination in the chamber. Below a treatment chamber (1) an intermediate chamber (30) is arranged. A supporting stand (34) is provided below the boat table (6) for supporting the objects to be processed, which can be loaded into or unloaded from the treatment chamber (1) gastightly through the intermediate chamber (30). The supporting stand (34) is mounted on a movable member movable vertically by means of a ball screw (13'). A bellows (22) is mounted between the intermediate chamber (30) and the movable member (12').

Automatic torque wrenching machine

Abstract: An automatic torque wrenching machine comprises a frame having a support member which can be raised and lowered by admitting air to or allowing air to leave a pneumatic bellows. A tong assembly is suspended from the support member by four ties comprising wire ropes each of which is provided with a spring. The pneumatic bellows allows pipes to be connected and disconnected with minimal risk of damage to the threads. In addition, the ties enable the tong assembly to float in a generally horizontal plane relative to the frame.

Case for disk-type recording medium

Abstract: A case for receiving disk-type recording medium made of paper and has a receiving chamber in which the disk-type recording medium is stored, the receiving chamber having a pair of walls faced to each other and each having a shape of bellows, a stopper is formed at a part of the receiving chamber, its lids or bottom, so that the disk-type recording medium is held in valleys of the bellows and by the stopper stably in a floated condition. This case can be used as an inner case to be inserted in an outer case.

Reciprocating bellows operated exercise machine

Abstract: Foot treadle operated exercising apparatus of this invention provides for transfer of air from one foot treadle operated vertically disposed bellows to another through a restricted pathway adjustable in size by an adjustable valve to select a desired work load A stroke length adjustment is featured for changing the length of the stroke This is achieved with bellows that are biassed to return to an extended condition in the presence of atmospheric air Thus with a closed air system, a manually operated air admission and venting valve will increase the bellows height when opened to admit atmospheric air and will decrease the bellows height when opened and pedals are depressed to vent air The foot treadles are operable from a standing, sitting or lying position An auxiliary arm exercise harness operates in conjunction with the foot operated treadles by means of hand manipulated lines cross connected so that the left hand will depress a right foot treadle and visa versa The entire work load is effected by the transfer of air from one bellows to the other when the treadles are operated in a riding, jogging or climbing action One embodiment provides for bicycle riding type of exercise activity

Improvements relating to beverage dispensers

Abstract: A concertina bellows (1) is raised and lowered to draw in water through an inlet (8) to pass through a tea-bag (34). As the bellows is compressed the extract is drawn out again through the tea-bag and is ejected through an outlet (10) to a cup. A further tea-bag (38) can then be indexed along for a similar procedure to take place. The bellows (1) can be replaced with a piston and cylinder unit.

Flexible connection arrangement for the two pipe portions particularly for motor vehicle exhausts

Abstract: In a flexible connection arrangement for two pipe portions having a metallic bellows which is connected axially on either side in a gastight manner with connection pieces, the sides of the connection pieces facing the bellows are provided with radially widened end portions. Also provided are a damping insert, which extends coaxially relative to the bellows a along its length and is in a working connection therewith, and heat protection device for the bellows acting in the radially inward direction. The damping insert encloses the bellows radially outwardly such that the turns of the bellows contact the damping insert. The lateral end regions of the damping insert are held in the widened end portions without being fastened thereto and are supported radially outwardly by the latter. The connection pieces are connected with one another via a spring which surrounds the damping insert radially outwardly. The heat protection means are formed by a pipe segment which extends within the bellows coaxially relative to the bellows at a radial distance from the latter and which is fastened to the connection piece located in the front as viewed in the direction of flow.

Dual chamber pump

Abstract: The present invention provides an improved design for a mechanical pump. The pump is a dual chamber design typically including a pair of expandable bellows driven in a reciprocating fashion by a supply of pressurized air. The use of expandable bellows reduces wear on the pump thereby lengthening the required maintenance intervals in comparison with dual chamber diaphragm pumps previously known. Additionally, the pump is easily disassembled for inspection, cleaning or maintenance. Furthermore, the high strength of the pump's design makes it possible to manufacture the pump entirely of corrosion resistant materials.

Air suspension system

Abstract: An air suspension system is proposed in which at least one displacement pickup (26) and at least one additional 2/2-way solenoid valve (27) are used in order to reduce the pressure in the air suspension bellows (21) of the front right-hand wheel (3) or in the air suspension bellows (21, 15) of the right-hand side of the vehicle to a defined level in order to facilitate entry and exit, which level, however, is still so high that the vehicle body (8) does not rest on its bump stop. Refilling of the bellows (21) or bellows (21, 15) is then quicker and requires less energy. The air suspension system is intended for public local transport buses.

Actuator rod hermetic sealing apparatus employing concentric bellows and pressure compensating sealing liquid with liquid monitoring system

Abstract: An apparatus that provides a hermetic seal of a valve actuator rod in a valve housing includes a piston having a center bore mounted on the actuator rod and a pair of concentric bellows, both connected to the piston at one end and connected to the actuator rod and the interior of the valve housing at their opposite ends. A sealing liquid contained in the valve housing at one side of the pair of bellows provides pressure compensation for a process pressure on the opposite sides of the bellows. The piston bore provides a tight sliding fit of the piston on the actuator rod and the piston is provided with at least one flow bypass channel permitting unrestricted flow of the sealing fluid through the piston channel. A sensitive monitoring system is mounted on the valve housing and detects slight leaks of sealing liquid through the concentric bellows or the actuator rod packing by detecting changes in the position of the piston relative to the valve housing interior.

Cervical traction device

Abstract: The cervical traction device comprises: a body including a shoulder portion, a head portion and a bellows which extends substantially across the width and height of the body between and connected to the head portion and to the shoulder portion and acting against and between substantially the full inner end surface of the head portion and the full inner end surface of the shoulder portion. The bellows, the shoulder portion and the head portion have aligned U-shaped openings therein adapted to receive a patient's neck. A hand operated air pump is connected to the bellows for pumping air into the bellows and for relieving or pumping air out of the bellows.

Specimen holder for a particle beam optical apparatus

Abstract: A specimen holder for use in a particle beam optical apparatus, for example an electron microscope. The motions of the specimen in orthogonal Z and Y directions are realized in known manner by motions of a tubular housing in a ball joint. In order to achieve a defined and reproducible motion of the specimen in the x-direction, a rod-shaped specimen support is supported in V-grooves in the housing. The specimen support is connected to a cylindrical flange member which is coupled to the housing via a bellows, providing a vacuum passage which is static for the x-motion. Static vacuum sealing is provided by an O-ring.

Cushion suspension system for agricultural boom

Abstract: A cushion suspension system for coupling an agricultural tool to a vehicle includes a flexible frame which permits vertical movement of the tool relative to the vehicle while maintaining the tool laterally fixed relative to the vehicle to prevent side-by-side oscillation. The flexible frame includes an air spring with an air filled bellows for providing vertical cushioning and a restoring force as the wheels of the vehicle encounter irregularities in the ground. Pressure within the air spring is adjustable to accommodate a range of agricultural tool sizes. The frame further includes a shock absorber for dampening vertical oscillation of the frame, with stops provided for limiting upward and downward displacement of the tool. The suspension system is particularly adapted for attaching an agricultural boom having a plurality of nozzles to a trailer-type sprayer.

Inflatable object, in particular an air mattress, comprising a section serving as a pump and a section to be inflated by the pump

Abstract: An inflatable object, especially an air mattress, with a part acting as a pump and a part inflatable thereby. In the pump part there is a device for spreading its walls making it unnecessary initially to provide air via the user's mouth or a bellows. A particulate propellant material, which may also take the form of waste, is used. A propellant material is a material which can be compressed and which on decompression, with the introduction of air, increases its volume. To prevent propellant material particles from penetrating into the valve between the pump and the inflatable parts, an air-permeable wall is fitted in front of the valve.

Bending device having a bellows

Abstract: A bending device for use in an endoscope, a catheter or the like is of a simple construction having a coil, an operating wire and a pair of limitation members for limiting an axial compression of the coil. The pair of limitation members are arranged along the length of the coil, and are mounted respectively on diametrically-opposite portions of the coil. The coil is bendable in a direction perpendicular to a plane in which the pair of limitation members are disposed. Instead of the coil, a bellows can be used.

Pressure regulating valve

Abstract: A pressure regulating valve comprises a bellows formed in the shape of a bottomed cylinder, a valve seat disposed opposite to a bottom portion of the bellows, a valve body provided on an outside of the bottom portion of the bellows so as to come in and out of contact with the valve seat due to expansion and contraction of the bellows, a valve body retaining meter provided on the outside of the bottom portion of the bellows and having an engaging portion used for the engagement with an outer peripheral wall portion of the bellows, the valve body retaining member serving to retain the valve body at the bottom portion of the bellows by being fixed to the outer periphery of the bottom portion of the bellows by means of the engaging portion, and a reinforcing member provided inside of the bottom portion of the bellows and located so as to be opposite to the engaging portion through a peripheral wall portion of the bellows.

Bellows made of thermoplastic elastomer

Abstract: A bellows made of thermoplastic elastomer material comprises clamping sections at opposite ends of the bellows, where at least one of the clamping sections consists of elastomeric material which is permanently bonded to the thermoplastic elastomer material.

Cartridge seal having a high contact pressure seal and means for intersleeve adjustment including quench fluid delivery

Abstract: An improved mechanical seal of the cartridge-type providing an inboard compressed packing seal between dual shaft sleeves and the pump shaft, compressed between the shaft sleeves by action of a plurality of radially arranged set screws. A sharp edge loaded gasket arrangement between axially stacked components which make up the rotary face, the stationary face, the bellows assembly and gland is provided. The axially stacked arrangement is reversible to accommodate either a stationary bellows or rotary bellows application. An annular channel between inner and outer shaft sleeves provides a flow channel for quench fluid flowing annularly inboard to the seal faces and outboard to a quench fluid exit, providing for a uniform annular quench flow.

Fuel injection valve

Abstract: The fuel injection valve for injecting fuel into a combustion chamber of an internal combustion engine comprises a valve housing and nozzle, having a nozzle body 1 with an axial bore 13 which has a slidable but not liquid-tight fitted nozzle needle 3 for reciprocating movement between opened and closed positions. In the upper portion of the axial bore 13 the sealing bellows 5 is fitted. The bottom of the bellows 5 is permanently kept in contact with upper end face of the nozzle needle 3. The bellow's flange is held in liquid-tight fashion between space 8 and top end face of the nozzle body for sealing the clearance between nozzle needle and body. A push rod 6 is the bellows 5 to impart an urging spring force to the nozzle needle 3. During the operation the nozzle needle 3 is lifted in unison with the bellows 5 against increased fuel pressure within the axial bore 13 in addition to the urging force of the nozzle spring 18. Thus a gradual lifting motion of the nozzle needle 3 is achieved and accordingly the fuel injection quantity is gradually increased at the start of the injection.

Expandable and collapsible belt-strap card holder

Abstract: An expandable and collapsible belt-strap container for conveniently carrying sports cards on a person comprises a container (10) having an inner side attached to the mid-portion (14) of a belt (12) by elastic webbings (13 and 13'). The container comprises an expandable and collapsible bellows (11) with an open top, and a flap (18) hingeably attached to an outer side of the container. The flap stretches across the open top and down the inner side of the bellows. A long piece of hook-and-loop fastener (19) is attached to the inner side of the bellows, while a short piece of hook-and-loop fastener (20) is attached to the distal side of the flap. Therefore, when the bellows is fully collapsed, the distal side of the flap may be attached to the lower side of the long fastener. When the bellows is fully expanded for carrying a large number of sports cards, the side of the flap may be attached to the upper side of the long fastener. Because the flap is attached to the bottom of the inner side of the container, it will stay in an opened position when swung outwardly. The bellows comprises a plurality of pleats, each having long and short sections, and sides and a bottom which are attached by curved comers, such that each pleat will be bistable (expanded or collapsed). The container, covering flap, and belt can all be separated or attached together.

Rack and pinion steering gear assembly

Abstract: A rack and pinion steering gear assembly 10 includes a rack 14 which is movable relative to a housing 12 to turn steerable vehicle wheels. The rack 14 extends through a bellows 34 which is connected with an end portion of the rack 14 and an end portion of a housing 12. A deformable and compressible body 40 of foam material is located in the bellows 34. The deformable and compressible body 40 of foam material includes a body 70 of closed-cell foam 10 material and/or a body 66 of open-cell foam material. The body 70 of closed-cell foam material retards conduction to the rack 14 of any water which may leak through the bellows 34. The body 66 of open-cell foam material contains lubricating liquid which is applied to the rack 14. If desired, the bellows 34 and deformable and compressible body 40 of foam material may be used in an apparatus other than a rack and pinion steering gear assembly.

In-line pressure balanced universal expansion joint

Abstract: An in-line, pressure balanced universal expansion joint for a piping system has a central bellows and opposite first and second end bellows secured to the opposite first and second ends of the central bellows. A first gimbal assembly pivotally links the outer end of the first end bellows to the second end of the central bellows. A second gimbal assembly links the outer end of the second end bellows to the first end of the central bellows. Each gimbal assembly has a gimbal ring pivotally linked to the outer end of the respective end bellows via a first linkage and to the respective end of the central bellows via a second linkage for pivotal movement about two perpendicular pivot axes.

Method and device for compressing a stack of high-temperature fuel cells

Abstract: A device for compressing a stack of high-temperature fuel cells (2), the stack being held in a frame (3), is intended to make possible optimisation of the compression of the cells in a common assembly with respect to one another. This is achieved in that a pressing or expansion element (5), in particular designed as a bellows to which internal pressure is applied, is provided between one end of the stack and the frame (3).

Sealing of joints

Abstract: Bellows composed of flexible material for sealing off a torque-transmitting joint which is provided with lubricant, the bellows being attached by at least one collar to a connecting part of the joint and by another collar to the outer part of the joint and isolating the joint in its interior from the environment, a passage for establishing a pressure balance between the interior of the bellows and the environment being provided on the collar on the connecting part of the joint, one section of the passage, which runs along the inner surface of the collar between the interior of the bellows and the environment, running in the circumferential direction around the axis of rotation of a corresponding connecting part of the joint in at least one partial area of the collar, and two adjoining sections which run at an angle to the abovementioned section towards the axial direction.

Built-in filter cartridge

Abstract: A filter cartridge (10) provided for building into a filter housing (25) contains a filter medium in the shape of bellows (12), an upper and a lower plastic fitting (14, 16) to each of which the bellows (12) are rigidly joined at the end face, and a gas-permeable metal support device (32) in the interior (42) of the bellows. This support device is, in the installed state of the filter cartridge (10), under a compressive stress and, in the uninstalled state thereof (10), is present loose in the interior (42) of the bellows (12). This filter cartridge is distinguished by a fixing device (52, 54, 62) for the support device (32), by means of which the lower plastic fitting (16) can be pulled away from the upper plastic fitting (14).

Pneumatic spring with an elastomeric rolling bellows that can be pressurised

Abstract: A pneumatic spring with an elastomeric rolling bellows that can be supplied with compressed air is attached airtightly at each of its ends to respective connection parts. One connection part is designed as a rolling piston (10) on which a rolling fold of the rolling bellows is supported. The rolling piston is of hollow design and forms an additional air chamber connected to the interior of the bellows. In order to achieve increased spring stiffness of the pneumatic spring in the face of long spring travels by means of a spring volume which can be decoupled, a double-acting closing part (24) is arranged in an opening (21) in the end wall (19) of the rolling piston (10) which is assigned to the interior (25) of the bellows. The closing part (24) is connected to a compression spring (33) which is supported against the other connection part (15). Above and below the opening (21) the closing part (24) has respective valve plates (26; 27) by means of which the opening (21) can be closed off in an airtight manner.

Gravity powered shoe air conditioner

Abstract: A compressor-expander type cooling, or heating system, is incorporated into a heel of a shoe, and is powered by reciprocal gravity pressures upon the shoe which occur naturally during walking. The cooling system functions through a bellows compressor chamber and a separate bellows expander chamber. The movable walls of the expander and the compressor are placed opposite each other, and transmit opposing vector forces to each other. A movable heel portion at the bottom of the shoe transmits movement to the movable walls of the compressor and the expander whenever the person wearing the shoes steps on the heel. This expands the expander and compresses the compressor. A network of heat exchange coils, containing a low boiling point liquid, communicates with the expander, and functions as heat absorbing evaporator. Another network of heat exchange coils communicates with the compressor chamber, and functions as a heat delivering condenser. Depending on the locations the evaporator and the condenser networks, the shoe can serve as a foot cooler or a foot warmer.

Thermoplastic bellows and method of forming the same

Abstract: A bellows for use in fluid control devices includes a head, a shoulder, a blind hole extending from an opening in the shoulder to the head, and a hollow compressible neck between the head and the shoulder, through which the blind hole extends. The neck includes a thin-walled, circumferential band located between the shoulder and the head. The bellows is formed by forming, in a body of thermoplastic material, an inner bore having an inner diameter. Next, at least one thin-walled circumferential band is formed between the head and the shoulder. Finally, the body is deformed to cause each circumferential band to bow.

Vehicle wheel incorporating tire air pressure sensor

Abstract: A tire air pressure sensor (18) is mounted on a vehicle wheel (10) and includes an inertial mass (40) which is urged radially outwardly by centrifugal force resulting from rotation of the wheel (10). The tire air pressure is applied to the inertial mass (40) in opposition to the centrifugal force. When the rotational speed of the wheel (10) is sufficient that the centrifugal force overcomes the applied air pressure, the inertial mass (40) moves radially outwardly and opens a switch (33). The speed at which the switch (33) opens is a predetermined function of the tire pressure. In another embodiment (130), a second sensor (154, 160) is provided to sense when the tire pressure is below a minimum value. A spring (140) urges an inertial mass (138) inwardly in opposition to the centrifugal force, and the tire pressure is applied to a bellows (154) having an end (160) which moves radially outwardly in proportion to the applied pressure. The bellows (154) opens a first switch (166) when the pressure is higher than the minimum value, and the inertial mass (138) moves radially outwardly away from the end (160) of the bellows (154) to open a second switch (168) when the wheel speed exceeds the value corresponding to the tire pressure.