Showing papers on "Bellows published in 1982"

Rolled flexible medical suction drainage device

Abstract: A suction drainage device is disclosed which comprises a receptacle communicated with a body cavity via an inlet tube. The receptacle is formed as a bellows, flat receptacle, foil or sheet bag, or foil or sheet tube and the like which can be folded or rolled up. A flexible check valve in the form of a foil or sheet valve, or flutter valve, is disposed inside the receptacle. The inlet tube is provided on a side of one edge of the receptacle so that the receptacle can be rolled up over a long roll path without interference from the valve. The device can be manufactured at low cost.

Apparatus for cooling integrated circuit chips

Abstract: A multichip thermal conduction module has improved cooling in a housing having a board including chips mounted on the board. The housing is divided so as to form first and second cooling portions. The chips are in the first cooling portion. Several bellows extend into the first cooling portion so that each bellows is urged into deflecting contact with a respective chip. A plurality of heat conducting strands are mounted in each bellows and extend into the second cooling portion. A fluid coolant is directed to flow across the heat conducting strands.

Liquid-sealed vibration isolating device

Abstract: PURPOSE:To perform proper operation to damp and isolate vibration under all running conditions of a vehicle, by a method wherein through-holes, having flow resistance lower than that of a throttle hole, are formed in a partition, while the holes are adapted to be openable, a thick portion is formed on a part of the partition to form a third fluid chamber, and a moving partition, by which the third chamber is partitioned into two spaces on the first and the second fluid chamber side, is provided. CONSTITUTION:A plurality of through-holes 61 are formed in a partition 6 so that they are located around the center part of a rubber elastic sheet 5, the flow resistance of the through-hole is made smaller than that of a throttle hole 63. A third fluid chamber C is formed by a cavity in a semi-spherical member 10 and the partition 6, and a moving partition 11 is installed. The fluid chamber C is communicated with a first fluid chamber A and a second fluid chamber B through a through-hole 64, formed in the partition 6, and a through-hole 101 provided in the semi-spherical member 10. The through-hole 61 is closed with a bellows 7 expanded upward through the supply of an oil pressure thereto by means of a controller before an engine is started, and is opened with the bellows released from the oil pressure during idling.

Bellows-type pump and metering system

Abstract: A system for the metered pumping and dispensing of fluid includes a filter for the pumped fluid and a pump connected to the filter. The pump is of the displacement type which includes a tubular, longitudinally-contractable bellows to receive fluid for pumping, fluid-activated reciprocating means to expand and contract the bellows, and means to selectively introduce working fluid to the reciprocating means. A rigid fluid-tight chamber is formed to surround the bellows, and means are provided to selectively introduce working fluid into chamber, whereby the working fluid assists in contracting the bellows as well as in partially balancing the internal pressure on the bellows.

Fluid pressure actuator for subterranean well apparatus

Abstract: A valve for use in controlling flow in a subterranean well and using an expandable and contractable fluid sealing bellows is disclosed. The valve has a valve closure member such as a ball valve head acutated by an increase in control fluid pressure. Control pressure causes the bellows to expand or contract and a control rod engaging the bellows can be shifted. The control rod is part of an actuating mechanism for shifting the valve closure member between open and closed positions. The bellows can support the difference between control pressure and well pressure which are respectively present on the exterior and interior of each bellows element.

Liquid-level measuring system

Abstract: MEASURING SYSTEM LEVEL OF A LIQUID IN A TANK FOR EXAMPLE THE WATER LEVEL IN BOILER WITH TWO PRESSURE SENSORS BELLOWS 18, 20 MONTES IN BOILER OF DIFFERENT LEVELS RESPECTIVELY THE LIMITS THEREOF LOWER AND UPPER L2, L3 BEACH VARIATION LEVEL L1 LIQUID BOOTS 24, 24 bEING FILLED FLUID AND CONNECTED BY A PIPE VERTICAL 70 AND MOVEMENT SENSOR 62 BELLOWS LOWER 24 PROVIDING AN ELECTRICAL SIGNAL PROPORTIONAL PRESSURE DIFFERENCE BETWEEN THE TWO BOOTS, SO THE WATER LEVEL IN THE BOILER TO PREVENT oVERHEATING THE REFERENCE IN THE LINE COLUMN 70 AND DESTRUCTION OF POSSIBLE BELLOWS 24, 24 IN SUCH THAT 350C TEMPERATURE AND PRESSURE 15 BARS, FLUID REFERENCE COMPRISES AN INSTRUCTOR SUBSTANCE LIQUID, AS NAK REMAINS IN LIQUID PHASE VERY HIGH TEMPERATURES EVEN THERE PRESSURE DROP IN THE BOILER NAK BEING EXTREMELY REACTIVE WITH WATER, BELLOWS 24, 24 ARE MOUNTED IN A SEALED ENVELOPE 26, 26 FILLED SUBSTANCE INERTE, SUCH AS ALLOY SnPb, SOLID STATE ROOM TEMPERATURE AND LIQUID PHASE FROM 86C, THIS ENVELOPE WITH A bELLOWS OUTSIDE 34, 34 FILLED WITH THE SAME SUBSTANCE IN COMMUNICATION WITH THE INTERIOR 46 50 ENVELOPE

High-precision measurements with a bellows volumometer

Abstract: A metal bellows volumometer operating to 250 MPa is described which uses a linear differential transformer in a novel, indirect way to establish the position of the moveable end of the bellows with a precision of about 1 in 60000. Calibration with both water and n-heptane has shown that the effective cross-sectional area of the bellows depends on both pressure and the extent of movement of the bellows. Comparison of excess volumes for acetonitrile-water mixtures calculated from the bellows volumometer data with values determined directly by other authors indicates that the device provides densities accurate to +or-0.02%.

Pneumatic lung analog

Abstract: A vertically oriented bellows has a fixed plate at one end and a movable plate at the other end. As air flows into the bellows, the movable plate pivots relative to the fixed plate and the free end thereof is cooperative with a readout panel to indicate the volume of the bellows. The plates are interconnected by an adjustable spring urging the plates toward each other when the bellows are expanded to simulate lung compliance. Selected tubes having calibrated flow characteristics interconnect the bellows to a lung ventilator to simulate lung resistance. Preferably, a pair of bellows are arranged in mutual association together to simulate a pair of lungs in order to analyze their interdependency.

Heat pipe thermal switch

Abstract: A thermal switch for controlling the dissipation of heat between a body (20), acting as a heat source, and a heat sink (22). The thermal switch is comprised of a flexible bellows (12) defining an expansible vapor chamber for a working fluid located between an evaporation and condensation chamber (16, 14). Inside the bellows (12) is located a coiled retaining spring (54) and four axial metal mesh wicks (46, 48, 50, 52) two of which (46, 48) have their central portions located inside of the spring (54) while the other two (50, 52) have their central portions located between the spring (54) and the side wall of the bellows (12). The wicks are terminated and are attached to the inner surfaces (56, 58) of the outer end walls (60, 62) of evaporation and condensation chambers (14, 16) respectively located adjacent the heat source (20) and heat sink (22). The inner surfaces of the end walls furthermore include grooves (64, 66) to provide flow channels of the working fluid to and from the wick ends. The evaporation and condensation chambers are connected by turnbuckles (30, 31, 32) and tension springs (26, 27, 28) to provide a set point adjustment for setting the gap (24) between an interface plate 18 on the condensation chamber (14) and the heat sink (22).

Face seal means with back-up seal

Abstract: In a twin spool gas turbine engine, a bellows serves to bias a carbon seal against its seal plate and a piston ring back-up seal spaced radially outward and axially from the carbon seal provides a controlled leak path in the event the bellows fails.

Ball valve actuating mechanism

Abstract: The disclosure provides an actuating mechanism for a rotatable ball valve unit wherein several axially extending pistons and cylinder units or bellows elements are mounted in the wall of the outer housing of the ball valve in angularly spaced relationship. Two diametrically opposed piston or bellows elements actuate the mechanism for axially shifting and then rotating the ball valve, while the remaining piston or bellows elements effect a displacement of the flow tube to maintain a seal carried by the flow tube in sealing engagement with the ball after its rotational movement has been accomplished. The desired delay of movement of the flow tube is accomplished through either varying the size of the bellows element or the spring constants of the springs opposing the actuating movement of the pistons, bellows elements or a combination of these.

Bathtub assembly for handicapped persons

Abstract: A bathtub assembly that can be raised and lowered has a bottom and a lift plate with scissors-like guide frames positioned between them, which said frames guide the lift plate vertically. Two collapsible hoses or bellows, made of material that bends but does not stretch, are sealed at the ends, one end being attached to the lift plate and the other to the bottom. The hoses or bellows 20, are connected by means of connection hoses and a manual valve to the house water supply line.

Bellows for aircraft access gangway - has sliding extension on guide rollers, with pivoted hydraulic ram and bumper

Abstract: The bellows is mounted on a sliding floor extension (2) to the gangway (4), with the free end of the bellows attached to a bumper (7) pivoted about a vertical axis on the extension. The upper end of the bumper is linked to a servo ram (8) mounted on the sliding floor, and the bumper frame is flexible to adapt to the shape of the aircraft. The bumper is stiffened by separately tensioned segments, the force between adjacent segments being adjustable. The single ram on each side of the gangway provides a simple fitting to replace the complex, heavy, crossed levers drive on conventional gangways.

Hydraulic cylinder assembly with a liquid recovery system

Abstract: A compressible bellows surrounds a piston rod of the hydraulic cylinder of a hydraulic elevator. The lower end of the bellows surrounds a liquid receiving recess in the gland box of the cylinder and, when a sealing ring on the piston rod closes and compresses the bellows, the leaked hydraulic fluid is discharged from the recess, via a ball check valve, and a return tube to a sump.

Flexible bellows link for pivoted section vehicle - has concertina pattern mesh inside elastic wall sheets, to limit extension

Abstract: The mesh (13) is made from non extending flexible material and is laid between two contoured layers of elastic sheet (12) in a concertina pattern. This allows the sheet to be stretched without straining the mesh, with the mesh limiting the amount of extension. The sheet is contoured with the bellows folds and is secured between hoop shaped mounting frames. As the vehicle corners the different parts of the bellows can be extended to stretch the bellows folds flat. The mesh pattern is arranged with the sides of the sheet parallel to the mesh lines. The material can be used to link the concertina-connected parts of a hinged-section vehicle e.g. a bus a bus.

Observing device by image guide

Abstract: PURPOSE:To make the observation in an atmosphere of vacuum and high temp. possible by airtightly disposing outside cylinders and inside cylinders consisting of connecting bellows in-between to the outer side of an image guide and circulating a cooling medium between these cylinders. CONSTITUTION:Outside cylinders 6, 6' connected to bellows 4, 8 and inside cylinders 7, 7' connected to bellows 5, 9 are provided on the outer side of an image guide 30 having an objective lens 3 at the leading end, and an observing part 2 having an observing window 1 is airtightly connected to the leading end of the outside cylinder 6. A cooling medium fed in through a suction port 10 passes the inside of the cylinders 7, 7', then through between the cylinder 6 and the cylinder 7 and is delivered out from a discharge port 11. The image light entering through the window 1 is formed with image at a leading end surface 30a by the lens 3, and this image is monitored 17 via the image guide 30, a relay lens 14, a variable magnification lens 15 and an image pickup tube 16. Thereby, the observation in an atmosphere of vacuum and high temp. is made possible.

Aerodynamic load distribution simulator

Abstract: A novel test fixture for simulating aerodynamic loading on an airfoil is described which comprises a pair of arrays of a plurality of individual pressure controlled flexible bellows supported between a pair of platens, one array configured to contact and conform to the upper surface of the airfoil and simulate the partial vacuum distribution thereacross, the second array configured to contact and conform to the lower surface of the airfoil and simulate the pressure distribution thereacross. A compliant stabilization structure configured to provide lateral stability to the bellows arrays under pressure conditions is described.

Bellows sealed stem for rotary valve

Abstract: A valve body includes a chamber for the flow of fluid between an inlet and outlet thereto. A valve member, such as a ball valve member, is positioned in the chamber for rotatable movement between an open position and a closed position to open and close the chamber. A bent valve stem extends between and is connected to the valve member and a rotatable valve actuator. Rotation of the actuator moves the valve member by rotation of the valve stem between the open and closed positions. The valve stem upper end portion is displaced from the valve stem lower end portion to provide the valve stem with a bent configuration. A bellows surrounds the valve stem to provide a hermetic seal around the stem between the valve body and the actuator. The bellows has a bent configuration corresponding to the bent configuration of the valve stem. The other surface of the valve stem is positioned closely adjacent to the inner surface of the bellows to provide the bellows with support substantially along the entire length of the bellows and means are provided to minimize wear between the bellows and stem. In operation, the bellows is internally pressurized and the support provided by the valve stem prevents lateral deflection of the bellows and failure of the bellows due to distortion.

Snap-in force sensor with bellows

Abstract: A snap-in LVDT force sensor includes a housing having separate chambers for enclosing an LVDT and an assembly of circuit components. One end of the housing is coupled for movement with one link of a two-link frame which is subject to the forces to be measured. A plunger is coupled for movement with the other link and includes a shaft which extends into one of the chambers to support an LVDT core for reciprocal movement within the LVDT coil assembly. A bellows is sealingly and flexibly coupled between the plunger and housing to provide protection from the environment. An optional spring may provide additional stiffness between the plunger and housing.

Sift proof liner for outer container

Abstract: A collapsible sift-proof, leak-proof paperboard liner, for an outer shipping container having opposed pairs of side walls interconnected a pair of bellows members. Each of the bellow members includes a pair of first bellows elements and a pair of second bellow elements. The pair of first bellows elements are foldably joined to a lower edge of a second side wall panel on a common fold line and are foldably joined to each other on a fold line extending normal to the common fold line. The pair of second bellows elements are foldably joined to an adjacent edge of a bottom wall on a fold line overlying the common fold line and foldably joined to respective first bellows elements on diagonal fold lines.

Low emission valve

Abstract: A low emission valve assembly for use with volatile fluids and incorporating a pair of independent inner and outer metal bellows mechanical seal assemblies with means to compensate for thermal expansion of a liquid between the seals and which means transmits product pressure within the valve to the seals, so that the inner seal floats with a near zero pressure differential from outside to inside. The compensating means can be a pressure responsive bellows arrangement or a pressure response diaphragm arrangement.

Car bridging arrangement for high speed railway vehicles

Abstract: An arrangement for bridging adjacent cars in high speed railway vehicles posed of an inflatable chamber bellows section which extends entirely or partially about the outer structure of the cars wherein the stiffness of the bellows section may be automatically adjusted to respective requirements of high speed travel and travel through curves in such a manner that the internal pressure in the chambers of the bellows section which is produced by inflating the section is controlled in a stepless manner or in individual steps by a control system supplied with fluid pressure through the compressed air system of the vehicle or from a compressor.

Air suspension for automobile

Abstract: PURPOSE:To improve the stability of an automobile and the feeling of ride in its straight movement, turning and braking, by providing a variable orifice in an air spring and changing the cross-sectional area of the orifice depending on the state of the automobile. CONSTITUTION:An air spring 3 comprises a bellows 4, a surge tank 12 and a variable orifice 13 consisting of a fixed orifice 14 and a solenoid valve 15, which is regulated by a controller 16. The output signals of an axle acceleration sensor 17, a forward and backward acceleration sensor 18 and a rightward and leftward acceleration sensor 19 are entered into the controller 16. Since the orifice 13 is automatically shifted depending on the moving condition of the automobile and the state of the road, the dynamic spring constant of the air spring 3 is changed to improve the stability of the automobile and the feeling of ride.

Forming expandable bellows filter - by forming cylindrical tube filter, sealing inside, expanding to deform tube and removing seal

Abstract: Method of mfg. an expandable bellows filter comprises (a) selecting a cylindrical filter tube; (b) placing inside the tube an expansible sealed element; (c) submitting the sealed element to internal pressure to expand and deform the tube; (d) forming on the tube, waves perpendicular to the tube axis by deformation against a series of moulds applied during the course of expansion of the sealed element, and closing the moulds together along the length of the tube; (e) removing the pressure and (f) the sealed element. The filter is esp. for filtering high pressure steam at high temp. The method overcomes the prior art problems of forming a wave form on the side of a tube and producing a deformation of a fine metal foil which is highly stretched into a wave form.

Calculation of stresses and deformations of bellows by initial parameter method of numerical integration

Abstract: By reducing the boundary value problem in stress analysis of bellows into initial value problem, this paper presents a numerical solution of stress distribution in semi-circular arc type bellows based upon the toroidal shell equation of V V Novozelov[8] Throughout the computation, S Gill's method[10] of extrapolation is used The stresses and deformations of bellows under axial load and internal pressure are calculated, the results of which agree completely with those derived from the general solution of Prof Chien Wei-zang[1–4] The extrapolation formula presented in this paper greatly promotes the accuracy of discrete calculation

Vehicle emergency brake - pneumatic piston forces steel bellows arrangement on to ground below vehicle

Abstract: The vehicle emergency brake has an integrated folding bellows (3) of welded spring steel, which can be opened or closed by altering its interior air pressure. On the base of the bellows is a rubber tread, to equalise uneven road surfaces. Above the bellows is a stiff cover (2). The brake is operated by a pneumatic cylinder whose piston lowers or raises the brake from the ground to a hollow (32) under the vehicle floor (31). Broad, thin steel bands (7) support the brake, in use, against damage from the vehicles forward motion.

Accumulator of ink jet printing device

Abstract: PURPOSE:To control the ink pressure in the accumulator highly accurately by providing a bellows or a diaphragm whose cross sectional area is smaller than another diaphragm in the wall of an upper chamber which is separated by the diaphragm in the accumulator, and detecting the displacement of the bellows or the diaphragm. CONSTITUTION:The space in the accumulator 20 is separated by the diaphragm 22 into the upper and lower chambers. An inlet port 25 and an outlet port 26 for the ink are provided in the lower chamber 23. An opening 30 is provided in the ceiling wall of the upper chamber 24. The upper surface thereof is closed by the diaphragm or the bellows 31, and liquid 32 fills up the inside. The cross sectional area of said bellows 31 is considerably smaller than the area of the diaphragm 22 (e.g. about 1/20). The top surface of said bellows 31 is pushed by a weak spring 33. A pressur detecting pin 28 is provided on the top of the bellows 31. The displacement of said pin 28 is detected, thereby the ink pressure supplied to the inlet port 25 of the lower chamber 23 is controlled.

Universally movable suspension member

Abstract: The invention relates to a universally movable suspension member for a direction indicating display system, especially for a gyro system (2), in which a bellows unit (1) is provided between a revolving disk (3) and the gyro system (2). The suspension member is designed as a double-bellows unit including two oppositely folded bellows (5, 6) so that, while a reliable and accurate indication is obtained, the volume of construction is decreased and the manufacturing costs are reduced.

Method and apparatus for producing radial-ply tyres

Abstract: 1. Process for producing radial-ply tyres in which the zenith of a carcass (12) and the package consisting of the belt (10) and the tread strip (11), which package is held by a clamping plate (1) connected to a transfer ring (8), are brought into contact and then pressed against each other with the aid of expanding bellows (5), characterised in that, before the package (10+11) is pressed on to the carcass (12), this being carried out by means of expanding roll-on bellows (5), two rubber collars (7), which are connected to the transfer ring (8) and form a tight-seal with the carcass (12), are applied to both sides of the latter, and in that the air is then evacuated from the cavity which is thereby formed above the carcass (12), whereby the formation of air locks between the carcass (12) and the belt (10) or tread strip (11) is prevented.