Showing papers on "Bellows published in 1969"

Vacuum belt conveyors

Abstract: A vacuum belt conveyor is provided comprising an endless belt or carrier formed of a plurality of hinged or linked together plate members and adapted to be driven by suitably powered sprocket wheels in engagement therewith. Each plate member supports a vacuum or suction applying means including an outer cuplike member and an inner extensible bellows or flexible diaphragm member, the latter having a plunger rod and roller mechanism attached to its free end for actuation by a common cam track cooperatively engageable therewith. The cam track is operable to expand each bellows or diaphragm causing it to form a vacuum or suction plenum communicating with the outer cup member through a common aperture provided therebetween for such purpose. Thus, when a flat plate or object is placed on the endless carrier belt in airtight sealing engagement with a plurality of outer cup members and the bellows means associated with each outer cup member is actuated by the cam track means, a plurality of vacuum or suction forces are applied to the underside of the flat plate or object thereby firmly and securely holding it against the endless belt carrier for movement therewith. The cam track means is designed to actuate the bellows units at a predetermined location relative to the path of travel of the belt and to release the bellows units or deactuate them at a different predetermined location along the path of belt movement.

Vapor seal for dispensing nozzles

Abstract: Vapors displaced from a liquid fuel tank by the liquid fuel being dispensed thereinto through a nozzle are collected by means of a flexible bellows which surrounds the nozzle and one end of which is sealed to the fillpipe of the fuel tank.

Shopping bag having reinforced walls

Abstract: A collapsible shopping bag having four sides and a square bottom when opened out from a flattened state. It is formed by two layers of flexible and heat-sealing plastics foil with an intermediate stiffening sheet of Kraft paper inserted between such layers extending continuously across the bottom and along two opposite bag sides. The bag in flattened state has two sideforming walls connected by a transverse bellows fold to form the square bottom and the mating longitudinal edges of the walls and the ends of the bellows fold are closed by heat sealing of the plastic foil layers.

Bellows flexible joint

Abstract: A FLEXIBLE JOINT FOR TRANSFERRING TORQUE INCLUDING A MULTILAYERED METAL CYLINDRICAL BELLOWS IN WHICH THE LAYERS OF METAL ARE SEPARATED BY AN ELASTOMERIC MATERIAL. THE ELASTOMERIC MATERIAL FUNCTIONS TO EQUALIZE STRESSES IN THE METAL BELLOWS AND TO REDUCE TORSIONAL WINDUP.

Implantable pressure indicator

Abstract: An implantable pressure indicator for detecting and indicating abnormal body fluid pressures in a body cavity or canal including a fluid conduit adapted to be connected to the body cavity or canal containing the body fluid whose pressure is to be measured and a distensible member associated with the fluid conduit. The distensible member can consist of a tubular sleeve, an elastic disc, or a longitudinally expandable bellows.

Differential pressure measuring apparatus

Abstract: AN EXTREMELY SENSITIVE DIFFERENTIAL PRESSURE TO CURRENT TRANSUCER EMPLOYING: (1) A UNITARY RIGID DISC AND A THIN PRESSURE SENSING MEMBRANE FOR THE CLOSED END PORTION OF A BELLOWS THAT HAS AN OPEN END MOUNTED ON A STATIONARY WALL? (2) AN OVERLOAD VALVE TO PROTECT THE MEMBRANE AGAINST RUPTURE BY THE SEPARATE FLUID PRESSURES ACTING ON THE INTERNAL AND EXTERNAL SURFACE OF THE BELLOWS? AND WHEREIN (3) THE OVERLOAD VALVE IS MOUNTED FOR MOVEMENT WITH THE DISC AND INTO SEALED ENGAGEMENT WITH ONE OR THE OTHER OF OPPOSITE SIDES WALL SURFACES OF THE STATIONARY WALL.

Heating system and heat generating pump

Abstract: Heating system for heating the interior of a vehicle in which an engine driven fluid pump circulates fluid through the vehicle engine, the heater core and the engine radiator. The pump has a thermally responsive bellows that moves a blocker plate to a retracted position under predetermined temperature conditions exposing a stator to the fluid flow path so that the temperature of the fluid is increased by turbulent fluid friction and by the friction between stator blades and the fluid. As the fluid attains a predetermined thermal energy level, the bellows expands to move the blocker plate to a fluid-blocking position so that the stator is out of the flow path and fluid friction is decreased thereby enabling the pump to operate at its highest efficiency.

Flow-induced vibrations of metal bellows.

Abstract: Longitudinal vibrations induced by internal flow in metal bellows resembling vortex shedding excitations of elastically restrained cylinders, discussing spring mass mechanical model

Unbonded cloth reinforced bellows and method of manufacture

Abstract: The wall of a chemically resistant bellows is formed from a loosely constructed cloth tube (preferably metallic) surrounding but not bonded to at least an inner tube of a substantially inelastic plastic material such as polytetrafluoroethylene resin. A second resin tube may be disposed over the cloth tube. Substantially nonexpandable rings are disposed externally within the valleys of the corrugations. The cloth may have a flat knit construction. The bellows can be formed by assembling the several tubes, adding the nonexpandable rings, and compressing the assembly axially in a suitable mold while the interior is filled with a medium under pressure.

Pressure sensing device

Abstract: A bellows chamber has directly connected thereto a restoring force coil and Hall field plate position sensing devices which utilize the same DC magnetism as the restoring force coil. DC magnetism may be provided by an annular permanent magnet, and the pressure responsive bellows may be disposed in the annulus of the magnet. One or more Hall devices may be disposed directly on the restoring force coil. In another embodiment, a pair of pressures may be monitored in a device having a bellows chamber for each pressure, the restoring force coil, sensor and magnet relating to one of said bellows being disposed adjacent the other of said bellows, with linkage interconnecting each bellows with corresponding force restoring and sensing devices, thereby providing for mechanical advantage between the force applied by the coil and the force applied to the bellows, so as to reduce the magnetic field requirements and thus the physical size of the device, for a given pressure. In another embodiment, the magnet, restoring coil and sensors may be disposed at the moveable end of a bellows chamber, opposite the pressure inlet. In another embodiment of the invention, a diaphragm may be utilized to define a chamber having a wall displaceable by pressure differentials thereacross, instead of a bellows chamber.

Seal for circular slots

Abstract: A SEAL ADAPTED TO BE MOUNTED ON A ROTATABLE SHAFT OR THE LIKE AND PROVIDE A SEAL WITH A MEMBER HAVING A SEALING SURFACE COMPRISING AN ANNULAR BODY PORTION, A BELLOWS SECTIONS PROJECTING FROM SAID BODY PORTION, A SEAL SECTION INCLUDING AT LEAST TWO SEALING LIPS PROJECTING FROM SAID BELLOWS SECTION AND DISPOSED AT AN ANGLE OTHER THAN 90* TO THE SEALING SURFACE, SAID SEAL SECTION INCLUDING A MASS PORTION OPERABLE TO GENERATE CENTRIFUGAL FORCES UPON ROTATION OF THE SHAFT TENDING TO PIVOT THE SEAL SECTION ABOUT SAID BELLOWS SECTION TO INCREASE THE PRESSURE APPLYING RELATION OF ONE OF SAID LIPS RELATIVE TO SAID SEALING SURFACE AND DECREASE THE PRESSURE APPLYING RELATION OF ANOTHER OF SAID LIPS RELATIVE TO SAID SEALING SURFACE.

Lung exercising apparatus and method

Abstract: A device and method for increasing the capacity and strength of lungs having an expansible bellows chamber, an inlet to the chamber connected to a conduit, a mouthpiece at the end of the conduit for breathing into it, and a selectively adjustable valve in the conduit for constricting the passage from the mouthpiece to the inlet, whereby a force in excess of the normal pressure developed by the lungs is required to expand the bellows, and an outlet for said chamber with a valve and variable control therefor adapted to open the outlet when the bellows has been expanded a preselected amount.

Temperature regulated flow control element for automotive air-conditioners

Abstract: Thermally responsive control element in the suction side of the compressor of an air-conditioning system. The control element is in the form of a housing having an integral valve seat formed on the inner wall. A poppet valve is carried by the cup of a thermally responsive element, and is biased into engagement with the seat by a spring. A bellows forms a continuation of the cup and has communication therewith, and with the cup contains a fusible thermally responsive material. The bellows is closed at its outer end and has abutting engagement with the end of the housing. As the temperature of the evaporator reaches a point that condensed water vapor on the evaporator coils tends to freeze, the bellows will contract and allow the valve to reduce the flow of as from the evaporator to the condenser, and thereby avoid uncontrolled freeze-up of the evaporator coils and the blocking of the flow of air through said coils.

Ditherable and tunable microwave tube having a dithered tuner actuator of fixed length

Abstract: 1,133,429. Transit-time tubes. S-F-D. LABORATORIES Inc. 23 June, 1967 [24 June, 1966], No. 29169/67. Heading H1D. A ditherable and tunable microwave discharge tube having a microwave circuit and means for producing a stream of electrons for interaction therewith, includes a dithering and tuning structure having a movable portion within the envelope which is operable from outside the envelope by an elongated actuator mechanism extending through the envelope, means coupled to the actuator mechanism externally of the envelope for dithering it to frequency modulate the output signal, and means for supporting the dithering means from the envelope and moving it towards or away from the envelope to tune the output frequency. As shown, a magnetron having a cathode 4 disposed coaxially with respect to an array of cavities formed by anode vanes 9, alternate cavities being coupled to a surrounding cavity resonator 12 through axial slots 13, is ditherable and tunable by means of annular member 14, which is supported from and axially displaceable by a plate 16, a pistonshaped portion 19 of which is axially slidable within a cylindrical portion 46 of the tube envelope. Dithering is achieved by axial vibration of the plate 16 produced by a flexible rod 21 having one end secured within the pistonshaped portion 19, and the other end concentrically mounted on an eccentrically rotatable shaft 25 driven by a motor 29, a transducer 34 providing an output voltage signal indicative of the instantaneous frequency deviation produced by the dithering. The dithering equipment as a whole is mounted on a platform 36, which can be axially displaced, to tune the magnetron, by rotation of a worm shaft 42, which meshes with teeth on the platform 36, a potentiometer providing a signal indicative of the magnetron frequency. Stainless steel bellows 59 seals the envelope; bellows 57 spring loads the ring gear to prevent backlash, and serves as an oil seal for oil 58 which lubricates, and provides viscous damping for, the dithering mechanism.

Single bellows water-cooled vehicle capacitors

Abstract: A fluid cooled vacuum capacitor in which only a single metal bellows is required. Coolant is directed down the hollow center of the main shaft to the device and returns in a counterflow direction in the space between the shaft-bearing sleeve subassembly and the internal surface of the bellows. A unique fluid sealing arrangement includes primary and secondary shaft seals of the chevron type with circumferential expander springs and a leakage relief path between seals. Shaft bearings are metal-to-metal type and are fluid lubricated.

Resilient sealing boots for universal joints

Abstract: A RESILIENT SEALING BOOT FOR A UNIVERSAL JOINT IN A MOTOR VEHICLE DRIVE LINE HAS AT LEAST TWO INTERCONNECTED ANNULAR DIAPHRAGM PORTIONS FORMING A BELLOWS PORTION OF THE BOOT, AND ONE OF THESE ANNULAR DIAPHRAGM PORTIONS ADJACENT OEN END OF THE BOOT HAS ON ITS INNER PERIPHERY AN INWARDLY DIRECTED EXTENSION WHICH STIFFENS THE BELLOWS TO WITHSTAND CENTRIFUGAL FORCES ACTING THEREON WHEN THE JOINT IS ROTATED. THE EXTENSION ALSO DIVIDES THE BELLOWS PORTION INTO TWO INTERCONNECTED CHAMBERS AND SERVES TO RETAIN LUBRICANT IN ONE OF THE CHAMBERS.

Servo pressure transducer

Abstract: Disclosed is a servo- or force-balance-type pressure transducer incorporating as the sensing element a bending beam comprising at least one bellows having a flat, flexible metal strip along one side. The beam is cantilevered at the open end of the bellows and the opposite closed end of the bellows carries a movable capacitor plate and a forcer coil. The moving assembly is balanced about the sensitive axis of the beam which coincides with its center of gravity. The forcer coil applies a restoring torque to the beam which balances out the bending forces due to pressure within the bellows, and the amount of current through the coil is an indication of this pressure.

Air suspension system for vehicles

Abstract: A vehicle having pneumatic bellows supporting both sides of the vehicle body is provided with a compressor which pumps air from the bellows on the inside of a curve to the bellows on the outside of a curve when the vehicle travels along a curved path. A valve system keeps the intake and discharge of the compressor open to the atmosphere when the vehicle is travelling in a straight line but is actuated in response to the angular acceleration of the vehicle about a vertical axis to connect the compressor intake and discharge to the bellows on both sides of the vehicle when the vehicle travels along a curved path. The compressor is driven from an axle of the vehicle through a speed responsive clutch so as to operate only when the vehicle travels above a predetermined speed. Level regulators are provided to regulate pressure in the bellows only when the vehicle travels in a straight line. A further level regulator is responsive to variations in the height of the longitudinal tilt axis of the vehicle.

Solenoid-actuated high-temperature fluid valves

Abstract: High-temperature valves are difficult to seal, and careful sealing is necessary, particularly where the fluid being valved is inflammable or, for other reasons, leakage must be minimized or eliminated. In several species disclosed herein, leakage is minimized by a properly prepared and surface-treated valve stem, for maximum smoothness and minimum wear, together with seals of organic material having the requisite temperature resistance bearing thereagainst. In the preferred species, a bellows is secured between the valve body and the valve disc, with the valve stem limited to axial movement so complete sealing is effected. In a special case, the bellows is a synthetic polymer composition material with the bellows formed unitarily, on one end, with the synthetic polymer composition valve disc.

Liquid bath reference cavity

Abstract: An improved liquid-bath-type reference cavity is provided, in which the cavity is formed by a closed-end metallic bellows. The walls of the bellows are fabricated from good thermal conducting materials with very thin wall thickness, which increases the effective surface area in contact with the liquid and provides a rapid stabilization of the cavity to the temperature of the liquid bath in which it is immersed.

High energy air cushion vehicle skid brake

Abstract: A high energy air cushion skid brake for decelerating gas cushion vehicle utilizing an air trunk (bag) design comprising means for rigidizing the air trunk structure to provide high contact skid pressure and including an expansible bellows mounted on the bottom side of the air trunk structure with friction skid brake members carried on the lower side of the bellows for ground contact with means for inflating and expanding the bellows for surface contact and including an air pervious heat shield fixed between the bellows and the skid brake member which dissipates the skid brake friction heat away from the rigidized air trunk structure when the skid brake member contacts with the ground.

Reinforced bellows universal joint

Abstract: A UNIVERSAL JOINT ASSEMBLY INCLUDING A FLEXIBLE, CYLINDRICAL TORQUE TRANSFER BELLOWS WHICH IS REINFORCED BY AN ELASTOMERIC STIFFENER MATERIAL RECEIVED WITHIN THE BELLOWS GROOVES. THE ELASTOMERIC MATERIAL INCREASES THE TORQUE CAPACITY OF THE BELLOWS BY REDUCING TORSIONAL WINDUP UNDER HIGH TORQUE LOADS.

Improvements relating to the Pressing of Workpieces from Materials in a Finely Divided State

Abstract: 1,160,137. Compression moulding. BRITISH CERAMIC RESEARCH ASSOCIATION. 1 Aug., 1967 [4 Aug., 1966], No. 34915/66. Heading B5A. In an apparatus for compression moulding ceramic dust, air is removed from between the dies during the compression stroke. A flexible bellows 15 surrounds the upper die 13 and cooperates with a die ring 12 which surrounds the lower die 11 to define a cavity 22 connected by flexible pipes 23 to a vacuum source so that as the dies close the air is removed from the cavity 22 via clearances 18, 18a, pockets 21 and holes 20. At the end of the compression stroke the vacuum is released to admit air at atmospheric pressure.

Pneumatic bellow operated clutch and brake

Abstract: A pneumatic brake and clutch has driving and driven members rotatably mounted in a housing which is fluid tight. A friction plate is positioned opposite the driving member and connected by way of a bellows to the driven member. The plate is normally biased by the bellows into frictional engagement with the driving member so that when the driving member is rotated, the driven member rotates also. Fluid under pressure may be introduced into the housing exteriorly of the bellows which compresses the bellows and pulls the friction plate away from the driving member so the torque is no longer coupled to the driven member. At the same time, the plate may also be pulled into engagement with a friction surface on the housing which brakes the plate and driven member to a stop.

Air bellows suspension system for vehicles

Abstract: A vehicle having an air supply conduit therethrough has pneumatic bellows supporting both sides of the vehicle body. An axle-driven compressor pumps air from one bellows to another depending on the direction of the curved path the vehicle is travelling. An air supply reservoir is connected through a check valve to the air supply conduit and to the bellows. A pressure regulator is connected to the compressor discharge and to the air reservoir. A valve system connects the compressor intake and discharge to the bellows on both sides of the vehicle when the vehicle travels along a curved path to pump air from the bellows on the inside of a curve to the bellows on the outside of a curve. When the vehicle travels along a straight path air is pumped to the air supply reservoir whose maximum filled pressure is greater than the pressure in the air supply conduit. In response to the maximum filled pressure of the reservoir the pressure regulator will connect the compressor discharge to the atmosphere so that air is pumped to the atmosphere after the reservoir has been filled.

Compound vacuum spring

Abstract: A vehicle suspension system in which a pair of vacuum energized auxiliary spring bellows are nested within the confines of the primary coil suspension spring between the sprung and unsprung masses of the vehicle, each such spring bellows providing a load simulating force on the coil spring acting additively with the other spring bellows to alter the static height of the sprung mass.

Valve arrangement to provide temperature level control at cryogenic temperature ranges

Abstract: A cryostat assembly is provided having a finned cryogen delivery tube spirally surrounding an internal cylinder. The terminating end of the tube is sealed and a cryogen escape port is located adjacent a detector heat load. The central cylinder contains a bellows arrangement having sealed therein the cryogen utilized in the delivery tube, or other suitable fluid. The bellows has attached thereto a needlepointed element having its needlepoint in operative relationship with the escape port in the delivery tube. Spring means normally bias the element to bring the needlepoint into closed relationship with the port. As ambient temperature varies, the fluid within the bellows expands and contracts, moving the needlepoint into and out of sealing relationship with the port thereby accomplishing bleeding feed of the cryogen from the delivery tube, the expansion of which into the lower pressured area induces cooling of the detector by virtue of what is known as the Joule-Thomson effect.

Flexible joint for piping systems

Abstract: A pair of tubes have short inner sleeves extending therefrom, and a flexible bellows is secured to these sleeves and connects the two tubes. A tubular guide extends from inside one of the sleeves through the other and has an annular stop. There is clearance between the guide and the sleeve through which it extends, thus permitting limited relative lateral shifting of the two tubes. Axial play between the two tubes is limited by engagement of the sleeve surrounding the guide with the first sleeve and with the stop.

Zone control valves

Abstract: The invention is concerned with zone control valves of the type employed in hydronic temperature control systems. The valve incorporates a molded elastomeric bellows and sealing means for controlling temperature determining fluid flow. The valve can be constructed by simplified manufacturing techniques and can be maintained more readily in the field, thus providing substantial cost advantages.

Nested composite spring assembly with multiple auxiliary spring units

Abstract: A vehicle suspension system in which a plurality of vacuum energized auxiliary spring bellows are nested within the confines of the primary coil suspension spring between the sprung and unsprung masses of the vehicle, each of the auxiliary spring bellows being connected in direct force transferring relation between the sprung and unsprung masses to provide a loadsimulating force on the coil spring acting in parallel with the other auxiliary spring bellows to alter the static height of the sprung mass.