Showing papers on "Bellows published in 1986"

Collapsible hollow articles with improved latching and dispensing configurations

Abstract: Hollow articles such as plastic bottles and tubes having a portion of the sidewall (20, 22) including collapsible bellows, are formed with modified inner and outer fold rings to reduce the angular flexure between unfolded and folded (latched) bellow walls. The bellow walls are modified by reducing the slope of the walls as they approach the inner fold rings (14) to thereby reduce the unfolded (unflexed) angle (28) between the walls at the inner fold rings. The modified geometry permits better utilization of high density linear polymer plastics by lessening or preventing the ''crystalline'' fracturing and lamination at the inner fold ring with the first collapse of the bellows. The bottle material is therefore no longer weakened at the inner fold ring. The modified geometry also permits use of low density polymer plastics and rubber for latching bellows with thicknesses and geometries that otherwise would tend to eventually spring back rather than latch. Also disclosed are dispensers incorporating combinations of latching and non-latching bellows with a raised base.

Electronic module with self-activated heat pipe

Abstract: A plurality of heat pipes extend longitudinally through a unitary or segmented circuit card module, terminating at both ends in cavities formed along lateral edges of the module. In one embodiment, bellows extend outwardly from the cavities in a direction normal to the plane of the module, terminating in interface plates which extends along the respective lateral edges of the module. In another embodiment, upstanding pillars are connected to bellows covering the cavities. Electronic components are mounted on a circuit card applied to a face of the module. The module is loosely received between opposed liquid cooled surfaces of guiderails in a circuit card rack. Heat from the components is communicated through the card to the heat pipes, increasing the pressure within the pipes to urge the interface plates or pillars into variable pressure contact with the guiderails. The pressure is sufficient to snugly hold the module in the rack. The thermal resistance between the interface plates or pillars and the guiderails varies as a function of the contact pressure, providing fast warm-up and lower operating temperatures for the components.

Pulmonary ventilator controller

Abstract: A pulmonary ventilator system has a bellows assembly and a source of driving gas connected by a series branch including an electrically-controlled switching valve and a motor-controlled flow-rate-controlling valve. A controller including a microprocessor senses the position of the flow-rate-controlling valve via a mechanical to electrical transducer and has outputs connected to and controlling the switching valve and the motor. It has programmed in its memory the maximum flow rate capacity of the flow-rate-controlling valve and the maximum capacity of the bellows. The microprocessor is capable of receiving from an operator his target values for minute volume, breathing rate and expiration time to inspiration time ratio. When the combination of these target values predict a flow rate or a tidal volume greater than the capacity of the flow-controlling valve and or greater than the bellows can handle, it reinstructs the ventilator system to employ a new and realizable value of breathing rate and/or expiration time to inspiration time ratio. The actual operating parameters realized by the controller are displayed.

Hydraulically damping bearing

Abstract: A hydraulically damping bearing which includes an inner bushing arranged in an outer bushing and an elastic element inserted therebetween. Chambers are provided within the elastic element which are filled with a damping medium and are connected with each other hydraulically by way of throttling channels extending in the area of the outer bushing. The throttling channels terminate in the chambers which, like the throttling channels, are sealed off against the outside. The bearing consists of two bearing halves adapted to be axially inserted into one another which include elastic bellows halves connected with the outer and inner bushing. The bellows halves include mutually opposite annular beads projecting into the interior of the chamber, between which is arranged an enclosed overflow channel.

Hydraulic servomechanism for controlling the pressure of writing fluid in an ink jet printing system

Abstract: HYDRAULIC SERVOMECHANISM FOR CONTROLLING THE PRESSURE OF WRITING FLUID IN AN INK JET PRINTING SYSTEM ABSTRACT OF THE DISCLOSURE A hydraulic servomechanism for controlling the pressure of ink supplied to an ink jet printer head includes a bellows located between an ink source and the head and arranged for expansion and contraction to decrease and increase the pressure of ink in the bellows. Pressure is sensed at the bellows output connected to the ink head and the sensed pressure is compared to a desired ink pressure to produce a driving signal which excites an electromagnetic driver coupled to the bellows. The driver applies a force to the bellows to adjust the pressure to the desired pressure. A position sensing switch is responsive to the volume of the bellows and controls a valve located between an ink source and the bellows input to maintain the volume of ink in the bellows within a predetermined volumetric range.

Sealed-type liquid cooling device with expandable bellow for semiconductor chips

Abstract: A semiconductor module cooling structure comprises a housing having a passage through which a cooling fluid flows; a cooling block to which the cooling fluid is supplied from the housing and which has an electrical insulating layer at the bottom portion and is combined with a semiconductor chip through the electrical insulating layer; and a bellows which is connected between the housing and the cooling block The cooling fluid is supplied to the cooling block through the bellows The bellows is formed in a manner such that a plurality of substantially plane ring-like metal plates are laminated, pressed, diffused, joined, and thereafter stretched and molded

Toilet bowl plunger

Abstract: The plunger includes an elongated knurled handle, a base sealing member having a central aperture extending therethrough, and a multi-pleated bellows preferably releasably connected to the bottom of the handle and preferably permanently connected to the top of the base sealing member. Preferably, the bellows and base sealing member are generally cylindrical and of rubber, plastic or the like. They may be integral. The sealing member may have an upper bowl sealing rim with a collapsable top wall adapted to receive the bellows, and a small diameter lower sealing ring, with depending skirt. Preferably, the transverse bellows pleats increase in diameter from the bellows top to bottom and may be arranged in sets for improved seating. The handle top can be removable and the handle can contain a central cavity extending longitudinally therethrough, which cavity can, if desired, be threaded to receive a garden hose. Thus, the handle top when unscrewed can act as a vacuum relief valve. The handle top can also include a padded transverse grip. The device is highly efficient and durable and is adapted for use in a variety of applications.

Variable capacity wobble-plate type compressor

Abstract: In a wobble plate type compressor with a variable capacity mechanism, the displacement is changed by varying the angle of the wobble plate (15), in response to a change in the pressure difference between a crank chamber (32) and a suction chamber (52). The pressure in the crank chamber (32) is maintained uniform by a valve, such as a bellows (63) and a needle valve (631) which allows excess pressure in the crank chamber to escape to the suction chamber.

Joint structure for a tube support plate and a tube

Abstract: In a joint structure for a tube support plate and a tube, a ceramic tube is provided aligned with a retaining hole of a tube support plate cooled by cooling medium and a bellows is placed in or near the retaining hole. An end of the bellows is fixed directly or indirectly to the tube support plate and the other end thereof is linked to the ceramic tube.

Rack and pinion steering gear assembly

Abstract: A rack and pinion steering gear assembly has a rack bar 5 displaceable through a cylindrical bush 7 secured by a pin 38 in a rack bar housing 11. A flexible concertina-type bellows 21 is provided between the housing 11 and a tie rod on the end of the rack bar. The bush 7 has an annular recess 42 which is in constant communication by way of longitudinal grooves 39 in the surface of the bush with the interior of the bellows 21. The recess 42 coincides with an aperture 43 in the housing wall 11 within which is snap fitted a tubular plug 44 through which the bellows 21 breathes by way of the recess 42 and grooves 39. The bellows 21 can breathe through the plug 44 to atmosphere (preferably by way of a filter) or by way of a pipe to the interior of bellows located at the opposite end of the rack bar. The bush 7 can partly define a pressure chamber 23 of a piston and cylinder unit for power assisted steering.

Vehicle brakelights activating device

Abstract: A device is provided, associated with the accelerator pedal of motor cars adapted to cause the lighting of the brake lights shortly before the brake pedal is applied in case of braking in an emergency. In one version of the device, it comprises a bellows mounted on the accelerator pedal. During normal driving, the bellows is pressed down to minimum volume thereof. When abruptly released, a sub-pressure is developed which is used to momentarily lift a metal flap which closes the brakelights circuit. The lights remain on until the light circuit is taken over by the brake pedal switching circuit. According to another version, the operation is based on the relative abrupt movement of a magnetic core surrounded by an induction coil. The electromotive force will generate a current effective to close the brakelights circuit.

Remote center compliance system

Abstract: A remote center compliance system for compliantly connecting a robot support arm interface to an operator device interface comprises at least three gas-tight spring bellows interconnecting the interfaces and a connection means for connecting the interiors of the bellows in common to an external variable pressure source. The compliance of the system, both rotational and lateral, may be controlled by the applied pressure. The bellows may also be evacuated so that their resultant collapse locks the support structure and operator device together.

Non-linear electromagnetic vibration device

Abstract: A non-linear electromagnetic vibration device including a first vibration part and a second vibration part. A non-linear bellows plate spring set is connected between the first and second vibrating parts. Each spring set is composed of sequentially coupled bellows plate springs, and each plate spring is elastic according to a predetermined particular waveform and has a plate structure of a predetermined shape. The waveform is selectable among many including portions of an exponential curve. The plate structure of each spring is rectangular with an edge which is straight, convex, or concave in contour. The first vibration part of the device is rigidly connected to a corresponding section of each spring set and the second vibration part of the device is coupled to a different or second area of each spring set. An electromagnetic core and armature of an electromagnetic source and respectively included in a different one of said first and second vibration parts, and stable reciprocating structural components each of a parallelogram shaped configuration are formed. Harmonic resonance frequency conversion can be obtained conveniently via mechanical adjustment of the number of plate springs in each sectionalized waveform plate spring set.

Cryopump with vibration isolation

Abstract: A vibration isolator particularly suited to isolating a closed cycle refrigerator in a cryopump includes two bellows covered with vibration damping material and separated by an intermediate mass. The damping material fills the spaces between corrugations of the bellows and is bonded to the bellows.

Target assembly for an electron linear accelerator

Abstract: A target assembly for an electron linear accelerator (LINAC), comprising a target for converting electron beams of different energies into x-ray beams. The target has a variable thickness which can be set to a predetermined value by adjustment means. In a preferred embodiment, the target is provided with a chamber defined by two parallel plates and a bellows connecting both plates. The chamber is filled with a liquid medium of a high atomic number, such as mercury. In operation the medium is pumped through the chamber, and cooled down in a heat exchanger.

Orientable cardiovascular sound

Abstract: Orientable endovascular sound for the exploration of the arteries. Between the head and the body, the sound has a zone of articulation, in which there are bellows which can be inflated by a fluid to produce the orientation of the head in a radial direction opposite the inflated bellows.

Pulse actuated hydraulic pump

Abstract: A pulse-actuated hydraulic pump includes a hydraulic chamber with a bellows having a volume increased or decreased by the selective application a force in an axial direction thereof by a piezoelectric actuator. Control means control electrically-driven valves to selective discharge fluid from the bellows in precisely controllable volumes through a first pumping port or a second pumping port.

Load break switch

Abstract: A single-phase ground enclosed load break switch for distribution voltages has a hermetically sealed cylindrical metal housing of from 2 to 6 inches diameter which contains an insulating gas under pressure. The switch has a movable contact assembly to contact a pair of opposed stationary coaxial conductors within the housing. Movement of the contact assembly along one conductor breaks the connection with the other conductor and simultaneously reduces the sliding contact force on the first conductor. The switch has conductive bands coaxially positioned near the housing around the conductors for low voltage measurements monitoring conductor energization and contact position. A rocking bellows at the fulcrum of a crank actuator provides a compact hermetic seal for the actuator without excessive strain of the bellows. A safety interlock with a visual indicator locks the contact assembly in case of a loss of pressure. Excessive pressure in the switch causes the bellows to be punctured with consequent locking of the contact assembly. The switch is small enough to be mounted directly on a transformer or placed into a cable, without the need for a separate enclosure.

Manipulator for handling objects within a sealed chamber

Abstract: A manipulator for handling objects within a sealed environment, such as an ultra-high vacuum chamber, is mounted on a port of the chamber so that an active portion of the manipulator terminating in a set of gripping jaws is located within the chamber, while an operating portion of the manipulator is located externally of the chamber. The gripping jaws are mounted at one extremity of a shaft for rotation through at least 360° irrespective of whether they are in an open or closed configuration. The jaws are opened and closed from the exterior of the chamber by means of a sleeve which is axially slidable on the shaft by means of a drive ring located on the operating portion of the manipulator. The interior of the manipulator is sealed against the environment external of both the manipulator and the chamber on which it is mounted by a continuous sealing boundary, which has no sliding seals and is made up of a series of rigid sections interconnected by metal bellows units, these latter permitting the rotation and axial shaft and sleeve displacements required for jaw rotation and for opening and closing movements of the jaws. Further metal bellows units in this continuous boundary permit axial displacement of the jaw region of the manipulator, irrespective of its rotational disposition and gripping configuration, and lateral movement of the jaw region in any direction, so that the jaws may be located at any point within a three-dimensional volume determined by the dimensions of the manipulator and the maximum displacements of the bellows units.

Flashing for building construction

Abstract: The use of a bifurcated joint to attach a conveniently sized metal flange to a flexible bellows material has been widely used, for example, in the manufacture of a building construction expansion joint cover. The known bifurcated joint is formed by clamping and engaging a marginal edge of the bellows material between opposed folded portions of the metal flashing. It has been found that the attaching force provided by this joint can be enhanced by providing teeth or protrusions in a portion of the metal bifurcated joint. Preferably a punch is used to upset teeth from one surface of the joint, preferably a corrugated portion of the joint, and then bend the thus toothed and corrugated portion into clamping engagement with the marginal edge of the bellows. The toothed hole clampingly engages the bellows material without piercing it and prevents pull out, both prior to curing of the adhesive bond as well as thereafter.

Method and a support fixture for the manufacture of bellows consisting of annular elements

Abstract: A method of manufacturing bellows members composed of stacks of annular elements which are joined together by weld seams produced alternately at inner and outer edges of the elements In the invention at least some of the annular elements of a bellows member are mounted on a rotating fixture for welding the seams by a beam welder During the production on one such seam the beam welding device is held stationary in relation to the elements

Cooling device attached to each surface of electronic parts on a printed-wiring board

Abstract: A cooling device located between a cooling plate having a first coolant circulating therein, and an electronic part to be cooled, mounted on a printed-wiring board, comprising a hollow part being thermally conductive, having a hollow chamber through which the first coolant circulates, and connected to the cooling plate by a flange part being thermally conductive, a thermal conduction plate attached to a surface of the electronic part and connected to the flange part by a bellows providing a space among the hollow part, the bellows and the thermal conduction plate, and a second liquid coolant filling the space for transferring heat from the thermal conduction plate to the hollow part by a convection current of the second coolant. The second coolant is made of alloy being chemically inactive to the bellows and having a low melting point so as to be liquid at ordinary temperatures.

Boot with bracing boss portion for universal joint

Abstract: A bellows-form boot for universal joint which is formed integrally of a le-diameter cylindrical portion and a small-diameter cylindrical portion at both ends, the former being adapted to be fitted to a joint case housing therein the universal joint and the latter to a driving shaft, a central annular bellows portion having ridge portions whose diameters are tapered down toward the small-diameter portion, and a bracing boss portion extending between the large-diameter portion and the bellows portion. The boss portion has a wall thickness of 2 to 3 times the average wall thickness of the bellows portion and is profiled so that the inner face thereof may abuttingly contact with the edge face of the joint case and the outer face thereof is flush with the outer face of the bellows portion in the mutual joining area. The bellows portion has, at its zone adjacent to the boss portion extending from the end to the crest of the first ridge portion thereof, wall thicknesses gradually increasing from the latter to the former, whose maximum is a half the wall thickness of the boss portion.

Tubular corrugated bellows-type elastomeric boot for bendable joint of mechanical elements

Abstract: A boot with a bellows interposed between a large-diameter ring and a small-diameter ring is disclosed. In the bellows, the crest which is the closest to the small-diameter ring is made thinner than the other crests. Accordingly, when the boot is mounted on a mechanical shaft joint, the crest closest to the small-diameter ring is folded preferentially, so that the pitches of the other crests are maintained. The other crests are not brought into contact with each other during the cross movement of the mechanical shaft joint or even if they come into contact with each other, the contact pressure reduced, and the durability is thereby enhanced.

Thermoelectric valve for channeling refrigerant gases into different tubes in refrigeration devices

Abstract: A valve for channeling refrigerant gases into different tubes of refrigeration devices comprising a casing enclosing a waxy, thermally expandable mass hermetically sealed by an elastically deformable diaphragm that activates the rod of a needle valve controlling two outlets of gases entering the valve. The heating of the casing is achieved by means of one or a pair of electrically-powered thermistor(s) (PTC). The valve is hermetically sealed against gas leakage; the electrical components of the valve are enclosed in a housing made of an insulated material, and can be removed and interchanged with respect to a bracket connected to the body of the valve with a tube. The valve rod lies longitudinally within the tube and is hermetically enclosed by a diaphragm or metallic bellows.

Oscillation pressure device for dynamic calibration of pressure transducers

Abstract: Method and apparatus for obtaining dynamic calibrations of pressure transducers. A calibration head (15), a flexible tubing (23) and a bellows (20) enclose a volume of air at atmospheric pressure with a transducer (11) to be calibrated subject to the pressure inside the volume. All of the other apparatus in the drawing apply oscillations to bellows (20) causing the volume to change thereby applying oscillating pressures to transducer (11) whereby transducer (11) can be calibrated.

Mechanism for centering relatively rotative components, particularly in rotary valves

Abstract: Rotary pressure control valves in booster steering systems are rotated by manual force at the steering wheel against a return force, usually a steel torque rod which is twisted by rotation of the steering wheel. Upon release of steering force, the untwisting of the rod causes reverse rotation toward neutral shut-off, i.e., centered position, so that coacting pressure channels of relatively rotated valve components are closed. Such reverse rotation is effected herein with the aid of a metal bellows which is compressed by cam operation during twisting of the torque rod. Upon untwisting, the bellows expands and acts through the cam to exert a reverse rotary force on the valve components to effect complete centering. Upon reaching centered valve position, the cam serves as a detent to hold the centered position of the valve components.

Spring strut for vehicles

Abstract: A spring strut for vehicles with an air spring and a damper is described. The damper comprises a piston, working in a cylinder, the piston rod of which is held in an elastic bearing element. Between the cylinder and a housing cap, a pressure chamber of the air spring is formed, sealed off by means of a flexible bellows. The housing cap of the air spring is held on the vehicle body and the piston rod of the damper is supported separately from the air spring in an elastic element mounted on the rigid housing cap. The housing cap which has a support area designed as a shoulder, which is directly connected to the vehicle body, is used as abutment for the air spring. The elastic bearing element, which at the same time seals off the pressure chamber of the air spring, is held, clamped by its circumference, in a cap end piece extended out over this body-side area.

Hot pressing of bellows like canisters

Abstract: A compressible bellows type metal canister is used in a hot pressing process for immobilizing high level radioactive nuclear waste material in the form of synthetic rock, the canister comprises a base wall and a corrugated bellows side wall of generally circular cross-section, concentrically arranged within the corrugated side wall is a cylindrical liner. In the center of the base wall a conically-tapered aperture is provided with a filter plug. Diametrically opposed apertures are provided in the base wall and are connected by an outlet pipe for removal of waste gases.

Device to compensate for the wheel contact area lateral forces on a spring strut

Abstract: In a device to compensate for the wheel contact area lateral forces on a spring strut of a wheel suspension for motor vehicles, with a standard unit, pivoted on at least one lower wheel suspension element, with a telescopic shock absorber and a wheel carrier, which standard unit is supported at the upper end on the body of the motor vehicle, a U-type bellows being arranged around the shock absorber as supporting spring element in such a way that the spring force runs in a resultant counteracting the lateral forces, this resultant is directly supported on the body of the motor vehicle and the damper bearing is independent of this support. At the same time, the U-type bellows or the spring element may be supported by means of a receiving bracket, inelastically connected to the body, whilst the shock absorber is elastically connected either indirectly or directly to the receiving bracket.