Abstract: A bypass valve is connected in line with the distribution line of a gas meter and includes a cylindrical housing with an inlet port connected to the distribution line, an outlet port connected to the gas consumer, and a poppet cage defined by two annular seats disposed internally between the two ports and formed with flow apertures. The housing is formed with an auxiliary port disposed between the inlet port and the outlet port. A threaded fitting for connecting to an auxiliary gas source extends through the auxiliary port and connects to the outlet seat of the cage. A cylindrical poppet is slidably disposed within the cage and is biased against the outlet seat by a coil spring interposed between the poppet and the inlet seat.

Abstract: An improved two-way check valve for controlling the flow of fluid to an element from either one of a pair of hydraulic sources in a hydraulic automatic transmission, the check valve having a flow cavity in which a pivotal flapper valve is mounted so as to alternately cover one of two inlet openings to the cavity.

Abstract: Method of regulating the level of a given element in an atmosphere of an enclosure to a value below a predetermined upper limit (L.sub.h), comprising the steps of:a) providing at least a first gas source and a second gas source, the level of said element in the first source being greater than the level of the element in the second source;b) under nominal conditions, using the first gas source to supply the enclosure with a nominal flow rate Q.sub.n ;c) measuring the level of the element in the atmosphere of the enclosure at at least one point in the enclosure to obtain a measurement;d) if the result of the measurement taken during step c) is greater than a first predetermined upper threshold (L.sub.h -.epsilon.), cutting the supply to the enclosure from the first gas source and supplying the enclosure from the second gas source at a flow rate equal to, or substantially equal to, Q.sub.

Abstract: A Flow control valve for a pump suction line permitting flow from an alternate source in the event of partial or complete blockage of a main source. The valve includes a valve housing having a main inlet port at one end, on auxiliary inlet port at its other end and a suction port between the inlet ports. Flow responsive valves are provided at the inlet ports and the valves are spring biased by springs which allow normal flow through the main inlet port. If the main inlet port is blocked the auxiliary port is opened. A flap valve is actuated by flow through the auxiliary port to close the auxiliary port and to create hydrostatic pressure between the blockage and the main inlet port to thereby dislodge the blockage.

Abstract: An improved meter bar assembly including an elongated casting (10) having threaded inlet and outlet ports (18) and (30) along with spaced, threaded swivel receiving ports (22), (36). Shoulders (54) are located in each of the swivel receiving ports (22), (36) and an auxiliary port (70) is also located in the casting. A cylindrical tube (72) is disposed in the auxiliary port and extends into the casting (10) to provide a mechanical barrier between the outlet port (30) and the swivel port (36). A cap (76) is provided for the tube (72) and a check valve (78) disposed within the tube (72). A pair of swivel tubes, (28) and (40) are threaded into the ports (22), (36) and one of the swivel tubes (40) includes an internal check valve (96). Both swivel tubes are provided with stop surfaces (50) that abut the shoulders (54) of the associated swivel tube receiving ports to positively locate the swivel tubes (28) and (40) in the meter bar (10) and with respect to one another.

Abstract: A sewage treatment system includes a pair of substantially identical unitary fluid treatment modules, each module having a central sedimentation tank surrounded by a peripheral wetland. The sedimentation tanks are coupled through a dosing device to an input source of sewage and, as an outlet, to a leaching field. The dosing device includes a switching mechanism isolated from the fluids, which mechanism provides in one cycle for one treatment module to be filled with the incoming sewage while maintaining its outlet closed. When the liquid level in the sedimentation tank in the first treatment module reaches a predetermined level the dosing device switches the sewage input to the other treatment module, while opening the outlet from the first treatment module to the leaching field. The dosing device switching mechanism employs pinch valves arranged so that when the inlet on one treatment module is closed, the inlet on the other treatment module is substantially simultaneously opened.

Abstract: A flow controller for preventing damage to a rotating machine by automatically redirecting the flow of lubricating oil in and out of a shaft driven pump in the event the machine goes into reverse rotation. The controller contains sealing elements that are moved under the influence of oil moving through the flow controller.

Abstract: The method relates to a method and a device for controlling the flow of a liquid. In a well (10) having at least one inlet (11) and one outlet (12) the areas of said inlet (11) is adjusted in dependence on the liquid level in said well (10) by a floating body (13) controlled by said level. Said well is provided with an inlet tube (15) ended by said inlet (11), and at least one outlet (12), a floating body (13) arranged movable in a vertical direction in said well (10), and a slide (14) arranged in said well (10) in front of said outlet (12), said inlet tube (15) and said slide (14) being movable in relation to each other in dependence of a movement of said floating body (13) so as to close adjustably by said slide said inlet (11) of said inlet tube (15).

Abstract: A bypass valve to be connected in line with a gas service line conducting gas from a gas meter to the corresponding residence or commercial building includes an open ended tubular fitting forming a flow chamber therein having a flow inlet end and a flow outlet end and an auxiliary port formed thereon to allow for access to the gas service line by an auxiliary gas source. An open ended poppet cage is mounted internally in the flow chamber and has one end thereof connected to the auxiliary port and further has a number of ports formed in the side wall thereof defining cage outlets. A poppet comprising a cylindrical center body with enlarged-in-cross section disks at the opposite ends thereof is disposed inside the poppet cage and has free axial movement therein.

Abstract: A viscous fluid shear clutch comprises a two-part outer casing 14,15 and an inner clutch member 10 between which is defined a clearance gap into which viscous fluid may flow to provide an adjustable degree of coupling between the casing and the clutch members. Fluid is continually pumped out of the gap by a circumferential scoop pummp. The clutch may be assembled for reverse operation by indexing the casing parts relative to one another. The quantity of fluid in the gap may be controlled dependent on sensed temperature and sensed speed or sensed temperature alone. A thermo pressure valve provides a pressure force related to the sensed temperature; this relationship may be inverse for failsafe operation.

Abstract: The application describes a method of introducing into a container a suspension or solution of a material in a propellant held under pressure, in particular a pharmaceutical material. The method comprises the steps of bringing a filling head into communication with the container; introducing a quantity of such suspension or solution into the container through the filling head; introducing a quantity of high pressure propellant without any of the said material into the filling head, thereby to flush through any suspension or solution remaining in the filling head; and withdrawing the filling head from the container. An apparatus and a filling head for carrying out the method are also described.

Abstract: A cleaning device for beverage drafting and dispensing systems, especially dispensing systems for carbonated beverages such as sodas, colas and fruit juices, as well as beer, utilizes primarily water and a liquid chemical cleaning agent which can be induced into the drafting lines from a storage container, and from which it can be removed again after a prescribed settling time. The system includes a hydraulically controlled change valve, controlled via three solenoid valves, pressurized with tap water and enclosed in a valve housing which contains a hydraulically movable piston which, in the operating "tapping" position, provides the first flow. Such flow is intended for the beverage. On the lower part of the valve housing, the beverage container adaptor equipped with a check valve is connected and on the upper part of the housing, a line connection is made with the beverage line leading to the tapping cock.

Abstract: A brake control device to be used for brake control and traction control of a motor vehicle includes a shuttle valve, a modulator, a traction control valve and a throttle valve. The shuttle valve selects a higher air pressure either from a brake valve, which operates when the brake is applied, or from a traction control valve, which opens during traction control to prevent wheel slippage. The shuttle valve allows the higher of the two air pressures to enter the modulator, which converts the entering air pressure to a brake hydraulic pressure to be supplied to the wheel cylinders of the motor vehicle. The throttle valve provided between the traction control valve and the shuttle valve decreases the air pressure from the traction control valve to be transmitted to the modulator when the traction control is activated. The throttle valve and the shuttle valve cooperate to increase the number of discharge air passages so that the brake control device has a greater discharge capacity when the brakes are released.

Abstract: A check valve which is positioned in the vacuum air line of an internal combustion engine. The check valve includes a single-piece valve body having an outlet port and two or more inlet ports, with one outlet port located substantially in line with the inlet port and connected by a venturi tube. The second inlet port is separated from the main air flow line by the valve stem and a diaphragm which allows communication there between and prevents back pressure. The second inlet port communicates with the outlet port through the valve stem and a second venturi tube which provides a vacuum boost to a device, usually vehicle brakes, connected to the inlet.

Abstract: In a heating, ventilation and air conditioning system such as a heat pump having a multi-zone hydronic thermal distribution system or such as an air conditioner, a novel condensate removal apparatus removes condensate from each zone fan coil. Each fan coil uses a valve to drain condensate from a fan coil drip pan into a drainage conduit. The drainage conduits from each valve carry condensate to a tank. The tank acts as a manifold for fluid collection from the different fan coils. A single pump draws condensate from fan coils through drainage conduits to the tank. This same pump draws a vacuum in the tank and the drainage conduits. The pump uses a single outlet conduit to discharge condensate.

Abstract: A proportional pressure control valve having a sleeve having a high-pressure source port, a low-pressure source port and an outlet port and a spool mounted in the sleeve kept in slide contact with the sleeve. Annular seals made of a resilient material are inserted in an annular groove formed in the inner surface of the sleeve. A spring is provided for biasing the spool axially. Valve portions are formed by shoulder portions on the annular seals and shoulder portions on the spool to open and close communication between the high-pressure source port and the outlet port and between the outlet port and the low-pressure source port as the spool moves. They are positioned so that when the spool moves in one direction, communication between the high-pressure source port and the outlet port opens and communication between the outlet port and the low-pressure source port is closed.

Abstract: The combination solenoid valve and shuttle valve (60) with self-cleaning orifice (92) comprises a shuttle valve (50) which is slidingly and sealingly received at an end (40D) of the solenoid valve (40). The shuttle valve (50) includes a stepped interior opening (54) which includes an insert (55) providing a shuttle valve seat (91) opposite a self-aligning solenoid valve seat assembly (94) of the solenoid valve (40). The valve seat (91) of the shuttle valve (50) includes an orifice (92) which extends from an end opening (70) of the insert and communicates with an insert passage (63) at an outer radial portion of the insert (55). An opposite radial side of the insert (55) includes a port (67) which communicates with a longitudinal passage (66) of the insert (55). Disposed within the longitudinal passage (66) is a brake-master cylinder check valve (59), and a stabilization check valve (58) adjacent a filter element (80) which permits communication with the insert passage (63).

Abstract: A pulsator has two valve devices (1, 2), each of which is adapted to alternately subject a pulsation space to two different pressures. In order to avoid the two valve devices (1, 2) from disturbing each other during the alternations between the two pressures a third valve device (23) is arranged, for closing communication between one of the valve devices and the lower one of said two pressures, when the other valve device is operated to alternate the pressure in the pulsation space from the lower one to the higher one of said two pressures.

Abstract: A device (10) for dispensing water from at least one delivery outlet (25) has a first tap device (19) for manually controlling the delivery from the outlet (25) of fluid flowing from a first source (22) and a second tap device (13) for manually controlling the delivery from the outlet (25) of fluid flowing from a second source (15, 16). At least the first tap device (19) is operatively connected to a cutoff device (30, 31, 32, 33, 402) for inhibiting delivery of fluid from the second source (15) when the first tap device (19) is operated to deliver fluid from the first source (22).

Abstract: An AND-type control valve useful in a vehicle braking system to prevent application of the vehicle brakes when only the right-hand or left-hand vehicle brakes are applied for the purpose of steering the vehicle. The control valve has two input flowpaths corresponding to the hydraulic braking circuit on different sides of the vehicle and a control output port for connection to the vehicle brake valve. Each input flowpath contains a non-return valve having associated therewith a flow sensitive device to provide a restricted flowpath which gives rise to a pressure drop which will tend to close or assist in closure of the non-return valve. A device is provided to prevent simultaneous closure of both non-return valves.

Abstract: A vacuum boost valve senses when the intensity of vacuum from a variable intensity vacuum source is about to drop below a threshold and supplies a boost so that when the intensity of the vacuum source is within a range immediately below the threshold, the intensity of vacuum delivered to a load does not drop below the intensity of the vacuum source and is in fact increased over what it would otherwise be without the boost. The vacuum boost is obtained by using a venturi.

Abstract: A sample supply device includes first and second sample supply means for independently receiving respective samples via a common channel and for supplying the samples to an inspection position. The device is controlled so that the second sample supply means performs a sample receiving operation and/or a washing operation with the channel, while the first sample supply means supplies the sample to the inspection position. A sample inspection apparatus inspects the sample at the inspection position principally using an optical method.

Abstract: A valve assembly is provided for controlling pressurized inputs from two separate fluid sources, and in particular to provide enhanced isolation between the sources and to buffer short-term fluctuations in fluid flow. A high pressure chamber is provided which is separated into two chamber portions by a fluid-impervious flexible membrane. A valve, such as a ball valve, having a movable member is positioned in an inlet port in each channel portion, fluid flowing, for a preferred enbodiment, from a fluid source under pressure through the inlet port of a chamber portion, an output port in the portion and a restrictor to a mixer. A pressure differential in the chamber portions deflects the diaphragm to bear against the movable member in the lower pressure chamber portion, closing the valve for this chamber portion before the pressure is sufficient to result in any backflow therethrough.

Abstract: In a fuel injection system for a multi-cylinder internal combustion engine, a plurality of injection nozzles discharge fuel adjacent the engine inlet ports, and a single injector meters the fuel to all of the injection nozzles. The injector may include an annular valve surface, a plurality of discharge passages opening through the valve surface to direct fuel to the nozzles, and a single valve member associated with the valve surface to control fuel delivery to the discharge passages. The injector may include a rectifier valve that admits air to the discharge passages when the valve member precludes fuel delivery to the discharge passages. The fuel discharge lines that connect the injector discharge passages to the nozzles may be surrounded by air lines.

Abstract: The combination isolation and check valve includes a valve member (80, 180) which has a reduced diameter section (82, 182) and an enlarged diameter section (84, 184) disposed in respective bore sections (70, 74) separated by an intermediate diameter bore section (72). The valve member can be displaced by increased fluid pressure to sealingly engage a seal (95) that isolates a master cylinder (12) from an adaptive braking system (10, 120). A flapper valve mechansm (110) that places an rifice (114) at a valve member end opening (96A) communicating with a longitudinal opening (96) and a transverse opening (93). The orifice (114) reduces pressure transmitted from a pump (45) to the bore (22) containing the valve member (80) without restricting fluid flow between the master cylinder (12) and an associated wheel brake (50). The valve mechanism (210) may be disposed in a passage (41) that communicates with the valve member (180).

Abstract: The differential pressure shuttle valve (10) comprises a stepped bore (14) having enlarged (16) and reduced (18) diameter sections. The reduced diameter section (18) communicates with first (20), second (22), and third (24) openings, and the enlarged diameter section (16) is divided into two chambers (50, 60) by an enlarged end (42) of a valve member (40, 140, 240). The valve member (40, 140, 240) includes a central through passage (48, 148, 248) which communicates with the first chamber (50) between the enlarged end (42) of the valve member (40) and the enlarged diameter section (16) of the stepped bore (14). The second chamber (60) is defined between the enlarged end (42) of the valve member (40) and a shoulder (17) disposed between the enlarged (16) and reduced (18) diameter sections of the bore (14). The second chamber (60) communicates with a fourth opening ( 70) and includes therein a resilient member (80) which biases the valve member (40, 140, 240) away from the first opening (20).

Abstract: A device for lubricating hydrodynamic bearings comprising an oil tank (2) and a pump (1) connected to the bearings (8) through a delivery line (5). The delivery line (5) has a value (9) placed below the oil level in the tank (2) . The valve has a casing with an inlet port (10) and an outlet port (11) end an auxiliary port (14). A movable member (12) with an axial passage (13) is mounted in the casing to take two positions so that in the first position it shuts-off the auxiliary port (14), the port (10) communicating with the port (11) via the passage (13). end in the second positions, it opens the port (14), the outlet port (11) communicating with the tank (2) through the port (14).

Abstract: In a shuttle valve device, a device body is formed by a single block in order to simplify construction. The device body is formed with a communication passage extending straight. A plurality of fitting bores are intersected with the communication passage. Each fitting bore extends straight from an outer surface of the block toward the communication passage. The fitting bore is intersected with the communication passage and has a forward end portion extending beyond the communication passage. The forward end portion serves as a pressure introducing section. Shuttle valves are inserted respectively in the fitting bores so as to divide the communication passage into a plurality of sections. Each shuttle valve compares pressure introduced through the passage section on one side of the shuttle valve with pressure introduced through the forward end portion of the fitting bore, to select one of the pressures and to lead the selected pressure to the passage section on the other side of the shuttle valve.

Abstract: A mobile cleaning unit for providing high pressure cleaning and rinsing sprays, comprising a van-type vehicle with separate sources of water and cleaning and treating solutions. The sprays may be heated by a self-contained water heater with a fuel ignitor operated by low voltage direct current. The separate solutions are selected by a pressure switch sensitive to an increase in spray line pressure caused by stopping the spray by operation of a valve at the spray applicator. The pressure switch acts to sequentially open a supply valve for each solution in turn.

Abstract: An injection shut-off valve for insertion into an infusion line comprises a housing with connections for inlet and outlet lines. The housing includes an orifice for introducing an injection syringe. A valve is installed in the housing and includes a deformable diaphragm. In a non-injection state, the valve device seals off fluid flow between the inlet and outlet lines on the one hand and the orifice on the other. During injection, the diaphragm is deformed to create an opening such that fluid flow from the inlet to the housing is shut off. During deformation of the diaphragm the orifice is brought into fluid carrying communication with the outlet line from the housing, thus making it possible for the injection fluid to pass through the housing into the outlet line, and to a patient.

Abstract: A fluid flow control valve in a fluid flow control circuit comprises a cavity, first, second and third ports open to the cavity, and a valve member for selectively closing the first port or the second port. The third port serves as an input for receiving fluid under pressure and the other two ports serve as to outputs for this fluid each extending to an associated outlet. A solenoid causes an armature to rotate about a lining so that a lever on the armature is arranged for selectively opening and closing the outlets to close the output associated with this outlet. The valve member is responsive to pressure drop at one or other of the outlets to close the output associated with this outlet. Downstream of the valve there are ducts extend from between the input and each of the outlets for supplying fluid received from the input.

Abstract: A water temperature cycling device for supplying intermittently hot and cold water for therapeutic benefits which has a cylindrical body (20) internally ported allowing water to drive a turbine (38) supplying rotational force to a rotor (48) through a speed reducing gear train (46). The speed of the cyclic action of the hot and cold water is governed by flow from a control valve (64) bypassing some of the flow from the turbine. The periodic repetitive changing from hot to cold is accomplished by a recessed portion (50) within the rotor (48). Each time the rotor makes a full rotation, the temperature changes completely as half of the circumference of the rotor is recessed. In another embodiment, the recessed portion is in a helical Archimedes curve shape allowing a more gentle effect. The device maintains a constant flow of combined hot and cold water regardless of the temperature change.

Abstract: A fluid flow regulator 10 comprises a body 11 defining three converging flow passages A, B and C between inlets 14, 13 and 12 respectively, and outlet 15, which is connectable to a suction source. Passages A and B each includes a valve. Turbine 16 in passage C drives actuating means periodically to operate the valves thereby to cause passages A and B periodically to be opened and closed in tandem. The regulator may be employed to suck predetermined quantities of fluid from two sources connected to inlets 14 and 13, respectively. Another embodiment serves as displacement apparatus for a submersible cleaner. With passage B open to admit water to drive a propeller 34 for displacing the apparatus and cleaner, passage A is closed to reduce suction at the cleaner. With passage B closed, passage A is open to transmit suction to the cleaner for it to be propelled by its own driving mechanism.

Abstract: A valve for cooling a reversible hydraulic machine includes a valve piston in a connecting channel extending between supply and discharge passages. Pressure in these passages displaces the spring-centered piston from neutral position to an end position. A central reduced-diameter portion of the piston carries a spring-centered closing member which closes a discharge conduit leading to a leakage space when the piston is in its central position. When the piston is displaced out of the neutral position toward one of the end positions, pressure from one of the connecting passages which has the lower pressure prevailing therein is permitted to propagate through one of the spring-receiving spaces delimited by the closing member and through an annular throttling gap present between the closing member and the central portion of the piston into the other spring receiving space and from there into the discharge conduit and into the leakage space.

Abstract: A change-over valve for hydraulic walking mine-roof supports comprises a valve housing containing a sealed-off operating piston in which a valve member supported on a helical spring is displaceably arranged, the piston being responsive to the supply of small quantities of hydraulic fluid through an end connection in the housing and having a sealing cone adapted to close a connection of large throughflow cross-section at the opposite end of the housing which also has a side connection for the supply of pressurized fluid to a working cylinder of a mine-roof support, the large throughflow cross-section at the connection thereby guaranteeing brisk pushing-in of a piston rod of a piston in the cylinder.

Abstract: An automatic valve is disclosed for controlling the direction of fluid flow. The valve is particularly suited for use with automatic pool cleaning systems to alternately direct fluid flow to the filtration system of an automatic pool cleaner. The valve includes a primary conduit and a branch segment to define an alternate path for fluid flow. A reciprocating piston is mounted within the branch segment. Indexing is provided by a first cammed surface, formed at one end of the piston which includes a plurality of slots. The slots are selectively engaged with a stop pin. The condition of the valve is determined by the length of the particular slot engaged with the stop pin. A spring is provided for biasing the piston out of engagement with the stop pin when the fluid flow is interrupted. In one embodiment of the subject valve, the volume and pressure of the fluid flow are automatically controlled.

Abstract: A mixing valve includes a housing having inlet ports and an outlet port that intersect at a valve chamber. A valve core within the valve chamber includes passages in fluid communication with the inlet and outlet ports. The passages intersect at a cavity within the valve core. An elastomeric seal retained within the cavity sealingly engages the valve core around the passages in the absence of fluid pressure in the inlets. Injection of a pressurized fluid in one of the inlets causes the seal to move away from both the corresponding inlet passage to permit fluid flow from the pressurized inlet port to the outlet port and compresses the seal around the other inlet port to provide a tighter seal than existed before application of pressure to the first port.

Abstract: A hydraulic pressure control device in a vehicle anti-skid braking system includes a brake master cylinder, a wheel brake actuating cylinder for braking a wheel in response to a fluid pressure from the brake master cylinder, a directional control valve actuatable in response to a signal from a control unit which detects a wheel condition such as wheel skidding, and a pressure control valve for disconnecting the brake master cylinder from a fluid pressure supply passage when a fluid pressure is supplied from the wheel brake actuating cylinder into a fluid pressure return passage connected to the pressure control valve when the directional control valve is actuated.

Abstract: A parking brake control device has a differential area shuttle valve which has an outlet connected to a brake actuator and a larger area of a poppet directed to an inlet connected to a control valve for applying a parking brake pressure and a smaller area of the poppet facing a second inlet connected to a service brake pressure such that in the event of simultaneous application of parking brake and service brake pressures the shuttle valve will be moved to close off the inlet to the service brake pressure while introducing park brake pressure to the brake cylinder.

Abstract: An automatic valve is disclosed for controlling the direction of fluid flow. The valve is particularly suited for use with automatic pool cleaning systems to alternately direct fluid flow to the filtration system of an automatic pool cleaner. The valve includes a primary conduit and a branch segment to define an alternate path for fluid flow. A reciprocating piston is mounted within the branch segment. Indexing is provided by a first cammed surface, formed at one end of the piston which includes a plurality of slots. The slots are selectively engaged with a stop pin. The condition of the valve is determined by the length of the particular slot engaged with the stop pin. A spring is provided for biasing the piston out of engagement with the stop pin when the fluid flow is interrupted. In one embodiment of the subject valve, the volume and pressure of the fluid flow are automatically controlled.

Abstract: The present invention is directed to a gas control device for controlling the fuel gas and the oxidizing agent supplied to a burner in an atomic absorption spectrometer, which includes a first restrictor and a first pressure regulator for the fuel gas line, and a second restrictor and a second pressure regulator of the oxidizing agent line, the regulators being connected upstream of the restrictors, respectively, and servomotors for reproducibly adjusting the pressure settings of the pressure regulators, respectively.

Abstract: Continuous extrusion apparatus for continuously deforming an elongated workpiece of indefinite length (e.g. rod) to produce an elongated product of indefinite length (e.g. wire) is disclosed wherein the improvement includes combination of structure for maintaining the elongated workpiece, the moving centrally apertured chamber through which it moves to be deformed by the deforming agency in coaxial alignment with the apparatus centerline during deformation and for maintaining the moving centrally apertured chamber in predetermined geometric shape (e.g. round).

Abstract: A three way check valve for a vehicle fluid pressure braking system includes a housing having first, second and third inlet ports and an outlet port. A pair of shuttles are slidably mounted in the housing, and are responsive to variations in the fluid pressure at the first, second and third inlet ports to communicate the inlet port having the highest pressure level to the outlet port, and to terminate communication through the other inlet ports to prevent back-flowing from one inlet port to the other inlet port.

Abstract: The fluid distributor (D1) is intended to be stacked against similar distributors (D2); it comprises a distributor body (1) in which a slide-valve (2) may slide; this body comprises a transverse channel (8) extending from one bearing face (3) to another bearing face (4), this channel (8) being intended to be combined with at least one pressure selector (S); an upstream housing (9) is connected by a duct (10) to a zone where a working pressure is established, this upstream housing (9) being further connected laterally to said channel (8). The distributor body (1) comprises on its face (3), intended to be turned downstream, a downstream housing (16) communicating with the transverse channel (8), the upstream housing (9) of a downstream distributor (D1) coming, in a stack, opposite the downstream housing (16) of the adjacent upstream distributor (D2) so as to form the pressure selector (S).

Abstract: Disclosed is a safety and kill valve device useful in tubing above a packer set above a producing formation in a well, operable to shut off tubing flow and open wall flow passages to the well annulus through which heavy formation killing fluid may be pumped into the tubing. A lower ball valve is used to shut off tubing flow and an upper sleeve valve, cooperable with the ball valve, controls flow through the wall flow passage. An operating tube moves downwardly, opening the ball valve and closing the sleeve valve while compressing a spring. The compressed spring furnishes operating force to move the operating tube upwardly, closing the ball valve and opening the sleeve valve. Two embodiments operate automatically in response to higher well annulus pressures. Another embodiment may be controlled through conduit from the surface or operate automatically in response to higher annulus pressures. All embodiments may operate repeatedly without retrieving from a well.

Abstract: A valve mechanism for a dual tank fuel supply system includes a housing (304) communicated to the return circuit (118, 218) and supply circuit (116, 216). The valve mechanism is responsive to pressure differentials between branches (170, 172 and 270, 272) of the supply circuit (216) to switch communication between branches (178, 180, 278, 280) of the return circuit (118, 218) accordingly.

Abstract: A valve useful for connecting a source of fluid under pressure to a using apparatus upon actuation of an explosive squib. The connecting structure includes an outer tube of soft material within which there is disposed an additional tube of material having a frangible area. The inner and outer tubes define an annular space and an inner tubular space. One of the spaces is connected to the source of fluid under pressure, while the other of the spaces is connected to the using apparatus. Particularly, the inner tubular space is connected to a source of gas under pressure, while the outer annular area is connected to the using apparatus. Upon actuation of the squib the inner frangible tube is broken at the frangible area upon a bending of the outer tube without its fracturing thereby connecting the source of fluid under pressure to the using apparatus, while at the same time isolating the products of combustion of the squib.

Abstract: The invention relates to a pressure averager for providing an averaged working pressure from the operating pressures of at least two sources of pressure medium, there being provided to average the operating pressures a differential piston of which the number of step faces which face the same direction and which are of equal size corresponds to the number of operating pressures to be averaged, of which the oppositely directed working face is equal to the sum of the step faces, and which is displaceably guided in a correspondingly stepped housing which is provided with supply lines for the operating pressures, and its object is to develop the pressure averager in such a way that an additional pressure relief valve is not required for its function within a hydraulic installation.

Abstract: An apparatus system for drying gases to provide a reverse flow to and from a pair of absorbent beds is automatically solely controlled by a unitary inlet logic shuttle valve unit and by a unitary outlet logic shuttle valve unit. Each valve unit employs positive acting slide valve elements that operate in a smooth and effective manner.

Abstract: A selector valve for an aircraft breathing system wherein oxygen enriched gas is provided by two sources, the primary source being fractionalized air and the secondary, backup, source being bottled oxygen is comprised of a control valve with three operating modes and a shuttle valve. In the first operating mode gas is provided from the primary source, in the second operating mode gas is provided from the primary source within certain operating parameters and outside these parameters gas from the secondary source is provided. In the third operating mode, gas from the secondary source is provided. The shuttle valve responds to the secondary source gas pressure and directs gas from either source to the pilot based on preset conditions.