Abstract: In a safety shut-off valve, a housing includes a valve member therein, having a first valve seat, and against which a valve normally rests during closure, with a spring normally biasing said valve off of said first valve seat, and with the force of the pressurized fluid passing through the valve causing said valve to act against the force of a regulator and a second spring to become unseated for allowing gas flow, and reseated once again against a second valve seat when excessive pressure is encountered and which curtails the further flow of fluid through the valve housing, and thereby shutting off the fluid from its source.

Abstract: The collapsible safety element has a polygonal end and a star-shaped end which are interconnected by flat triangular sections. The triangular sections are disposed relative to one another so that the points of the star-shaped end are in line with the corners at the polygon-shaped end. Consequently, when the safety element is closed, the triangular sections extending from the star-shaped end are disposed in parallel relation to each other. This improves and increases the sealing effect of the safety element at high pressure.

Abstract: The valve opens in response to a predetermined small pressure differential acting across the valve. As the pressure differential increases, the valve throttles the flow and when a high pressure differential exists the valve closes. The valve is designed to be placed in a by-pass circuit in an automotive air conditioning system to provide adequate flow under low cooling loads to cool and lubricate the compressor. Under normal and high evaporator loads, the by-pass flow is throttled or closed off completely to avoid needless consumption of energy.

Abstract: An automatic hydraulic shut-off system for use with a hydraulic valve and a work apparatus which is retained under hydraulic pressure even when the hydraulic line is broken inadvertently. A lock valve is connected in the line and senses the loss of hydraulic pressure, and the valve is actuated in response to the pressure drop and retains the work apparatus in a pressurized condition to thereby avoid undesired movement in response to the loss of pressure.

Abstract: An automatic check valve, particularly adapted for use in installations where it is desired to have the valve close automatically when a rupture occurs on the supply side of a high-pressure pipe system. The valve element for the check valve, which is adapted to move toward or away from an annular valve seat formed in a valve body between inlet and outlet ports, has a cone portion, preferably a truncated cone portion, which extends through the opening formed by the valve seat in the valve cody. This truncated cone portion, which reduces the cross-sectional area presented to fluid flow through the valve as it closes upon the occurrence of a rupture, results in a damping action which prevents shocks to the piping system as the valve closes upon the occurrence of a rupture. An additional damping piston is connected to the valve element to assist in the damping action as the valve closes.

Abstract: An automatic hydraulic shut-off system for use with a hydraulic valve and a work apparatus which is retained under hydraulic pressure even when the hydraulic line is broken inadvertently. A lock valve is connected in the line and senses the loss of hydraulic pressure, and the valve is actuated in response to the pressure drop and retains the work apparatus in a pressurized condition to thereby avoid undesired movement in response to the loss of pressure.

Abstract: A fluid pressure gauge type pressure responsive gauge drive having a drive to a sensor controller system with sensor controllers actuatingly engaged at respective adjusted pressure limits with gauge movement travel unimpeded by sensor controller contact in the range of movement between sensor controller pressure limit position settings. The drive may be connected to drive a fluid pressure gauge needle over an indicating dial and upper and lower pressure limit setting needles are adjustable to desired settings over the indicating dial. Calibration structures are provided for a coordinated setting of the gauge dial drive and in the drive of the sensor controller system calibrating each gauge structure for the "C" type bourdon tube installed.

Abstract: A vapor pressure equalizing valve disposed in a vapor return conduit between a storage tank and a liquid receiving tank to provide the same volume of flow but at a higher rate and greater fluidity than that of liquid flow volume in a preferably larger liquid conduit, and providing an excess flow shut off response that can be triggered manually or by the danger of a hose rupture or in case of fire or a break in the vapor return conduit, to protect either tank, or with two valves protect both tanks, with great quickness of action. The valve serves as a manual vapor flow shut off valve which may be latched open; and is unlatched to close by a local or remote control or fire, but while latched open provides an excess flow arresting action.

Abstract: In a preferred embodiment of the invention, an accessory safety valve is provided for mounting within outlet-ports of tanks designed to contain pressurized gas of some sort, particularly of an explosive or caustic nature, to replace the conventional outlet conduit normally mounted in such tanks which normally have the on-off valve exterior to the tank devoid of any safety back-up feature, the present accessory safety valve having the pressure-responsive safety mechanism mounted within the end of the conduit passage that extends totally inside the tank totally beyond exterior-mounting male thread to the conduit, placing the valve and valve set therefor thereby in a removed position protected against damage and failure in the event of an exterior-tank blow or impact against portions of the conduit mounted exterior to the tank.

Abstract: The device has a gas passage of adjustable flow cross-section through which gas flows in normal use. Inflowing gas also acts on a blocking member, and when the pressure of the inflow gas rises above a certain value, the pressure on the blocking member is sufficient to move the blocking member into the gas passage to block the passage. The blocking member is then retained in position in the passage, blocking the gas flow by the gas pressure. The blocking member can be a ball which is moved against the force of gravity by the pressure of the gas to close the passage.

Abstract: An emergency two-way shut-off valve comprises a housing and two valve members having openings therethrough which when the valve members are spaced apart, permit flow of fluid through the valve but, when the valve members are pressed together, are blocked off by imperforate portions of the valve members. Both valve members are movable and spring-urged apart towards respective stops within the housing.

Abstract: A safety valve actuator and pilot system for emergency closure of a flow line for fluids such as oil and gas including a hydraulic valve actuator connected on a valve in a flow line for opening and closing the valve, a pressure sensing pilot valve communicating with the flow line for directing operating fluid into the hydraulic actuator in response to a predetermined pressure change in the flow line, a closed fluid storage system connected with the hydraulic actuator for containing exhausted operating fluid and redirecting the fluid back into the flow line, and flow connections for operating the actuator to reopen the safety valve. One form of the system operates directly from flow line pressure for response to the predetermined high pressure. Another form of the system includes an operating fluid storage tank and functions in response to either a high or high and low pressure in the flow line.

Abstract: Apparatus is provided for connection along a conduit for free flowing transmission of fluids in a first direction and for selective control of fluid flow in a second direction. The apparatus provides means whereby fluid flow in the second direction in excess of a predeterminable rate of the fluid flow permits a fixed volume displacement of fluid within the conduit without limitation upon the predeterminable rate of fluid flow. The apparatus also defines second means whereby fluid flow in the second direction and within the predeterminable rate of fluid flow permits an unrestricted volume displacement of the fluid through the conduit.

Abstract: An improved resettable safety valve for preventing the escape of gas from a closed gaseous system wherein an inlet line is attached to the inlet chamber of the valve and an outlet line is attached to the outlet chamber of the valve. The valve comprises a housing wherein a piston-like plug with a head at one end and a rod-like body at the other end are contained within the housing. The housing includes an inlet chamber sized such that the plug head is movable laterally within the chamber. The housing includes a main chamber adjacent the inlet chamber and along the same axis as the inlet chamber and an outlet chamber adjacent the main chamber and along the same axis the main chamber sized such that the rod-like end of the plug fills the chamber at one end thereby preventing the flow of gas through the outlet chamber when the rod-like body is within the outlet chamber.

Abstract: A nozzle regulating device connected to a suction hose automatically regulates the suction at a nozzle. The suction will be a maximum when the fluid completely covers the suction inlet of the nozzle and a minimum when the suction inlet is completely clear of the fluid. A slide valve member is operable by two pistons of different diameters slidable in respective cylinders of a housing. A first pipe section connects the suction inlet with a valve port in the housing. A second pipe section connects the suction hose with another valve port in the housing. Thus, the suction applied to the suction inlet from the hose is under the control of the slide valve member. A pipe connects the drive space in the larger diameter cylinder housing to the first pipe section, and another pipe connects the drive space in the other cylinder housing to the second pipe section.

Abstract: A valve disposed in a fluid system for cutting off the flow of fluid from a ource of that fluid to a fluid-using environment upon the occurrence of either an excess or unduly high fluid flow rate or an excess pressure condition experienced in or near the environment. An obturator, disposed in a flow chamber between the valve inlet and outlet, is controlled by two independent assemblies which are responsive to either the flow rate through the valve or the pressure downstream of the valve in the environment. A bias spring, part of a cutout obturator assembly and located in the obturator, maintains the obturator in an open position until an excess flow rate promotes a seating of the obturator. A spindle slidingly connects the obturator to a sensing piston assembly so that when an excess pressure condition is experienced in the environment the obturator is pulled into the seated position causing a cessation of fluid flow through the valve and an isolation of the environment from the fluid source.

Abstract: 1. A sensitive blocking valve device comprising a casing, said casing comsing a pair of half-shell members each including a mating surface at the outer periphery and each having an axial valve seat portion projecting into the interior of said casing and in mutual alignment, an axial orifice through the valve seat portion of each half-shell member, a metallic valve wafer comprising a central valving portion disposed to move to close either of said orifices in said valve seat portions of the casing and having an integral double spiral flat spring formed integrally therewith and extending from said central portion, and an annular portion at the outer periphery of said double spring and formed integrally therewith, said annular portion being disposed in clamped relation between said half-shell members, said wafer including said double flat spring and annular portion all being of the same uniform thickness and planar when the valve device is unoperated.

Abstract: A valve arrangement for automatically stopping the flow through a conduit section on the occurrence of a rupture or leak in the section, the arrangement comprising a closing or blocking valve including a movable closure device mounted at the inlet of the conduit section. The valve is normally open and offers the medium flowing therethrough a resistance resulting in a first pressure drop across the valve in response to the size of the flow. This first pressure drop is arranged to actuate the closure device to thereby close same. A flow sensing device is mounted at the outlet of the conduit section, and an orifice plate or venturi constriction is located between the inlet and outlet sides thereof, so that the medium flowing therethrough generates a second pressure drop in response to the size of the flow, this latter pressure drop being arranged to actuate the closure device in an opening direction.

Abstract: An improved pressure regulator for an inflatable cuff on an endotracheal tube or the like includes a housing which contains a valve assembly and a pressure regulating chamber. The housing is adapted to be connected to an inflatable cuff so that the pressure regulating chamber communicates with the cuff through the valve assembly. The valve assembly (1) permits slow increases in air pressure in the cuff to be transferred into the pressure regulating chamber, thereby preventing over-inflation of the cuff, and (2) closes in response to relatively rapid pressure changes in the cuff to prevent collapsing of the cuff when the pressure of the air or other gas delivered through the endotracheal tube (e.g., by a respirator) is relatively high. A spring-biased piston is disposed in the pressure regulating chamber for regulating the pressure in an inflatable cuff to which the regulator housing is connected, and a rolling diaphragm covers the piston.

Abstract: The safety element is disposed at the end of a line which communicates with a pressure vessel. The safety element allows flow from the line into the pressure vessel. Upon an abrupt decrease in pressure in the line caused, for example, by a fracture, the safety element collapses so as to close off the line to the pressure vessel. The safety element is constructed as either a folded cone or as a rigid plate with plastically deformable members securing the plate to a line.

Abstract: A valve having a closure element in the form of a tapered plug normally maintained by gravity on a vertical rod extending loosely into a bore in the plug. Flow of fluid through the valve in excess of a predetermined rate acts on a flow-responsive surface of the plug to move the latter into engagement with a valve seat, thus blocking further flow. The construction is particularly suited to close control of the flow rate at which closure of the valve occurs. The size, shape, weight and position of various elements influences the magnitude of the flow rate required for closure and may be tailored to effect closure repeatedly at a virtually exact desired flow rate. One embodiment includes means for selectively changing the shape of the flow-responsive surface, and thereby the flow rate at which closure occurs.

Abstract: A flow control valve assembly for controlling the flow of a working fluid which has a housing that defines a valve chamber therein, an inlet port to the valve chamber and an outlet port from the valve chamber, a valve body which is movably carried in the chamber between a closed position that blocks the outlet port from communication with the inlet port and an open position so that the inlet port is in communication with the outlet port to allow the working fluid to be forced through the valve chamber, and a valve control means responsive to the velocity of the working fluid flowing through the valve chamber or responsive to the pressure differential across the valve body to operate the valve assembly by moving the valve body between the open position and the closed position.

Abstract: A cylinder housing has a passageway extending in from the exterior thereof for admitting and discharging fluid to a cylinder portion. A piston in the cylinder has return movement by means of a resilient retracter, and a check valve having protected support in the housing is arranged to close off fluid discharge from the cylinder under abnormal fluid pressure return conditions such as when the ram is in use and there is a failure in the fluid supply for the piston.

Abstract: A hydraulic booster unit and system for use in operating hydraulic units, such as work holding hydraulic cylinders, from a compressed air power source is disclosed. The booster includes a unique refill unit that automatically feeds hydraulic fluid from a reservoir to the booster to replace lost fluid during use, and also includes an alerter for giving warning on the onset of a low fluid condition (such as may occur from an exhausted reservoir or excessive leak), and thus protects against excessive leakage as well as the dangers to the work piece and worker inerent in a low fluid condition. The alerter may be a visual unit or a compressed air-operated audible alarm or both.

Abstract: A check valve assembly for use in a drill string to prevent reverse flow of drilling fluid through the string while permitting such fluid to be pumped downwardly through the well under normal conditions. The assembly includes: a valve body; a ball valve member, normally located out of the flow path in a side recess; a valve seat located above the valve member and means for controlling the rate of reverse flow of fluid required to move the valve member out of the side recess and against the valve seat.

Abstract: An excess flow valve for use in a conduit as a precaution to quickly shut off the flow of a fluid in said conduit in the event of a rupture in the conduit. A valve disc is connected to a linkage including a two-arm lever, one arm of which engages a spring-biased stop for adjusting the distance of the valve disc to its valve seat in quiescent flow state and the other arm of which is connected to a setting device for manually or automatically closing the valve regardless of the pressure of the fluid flowing through the valve.

Abstract: A hydraulic safety system for use with a hydraulic valve and a work apparatus which is retained under hydraulic pressure even when the hydraulic line is broken inadvertently. A lock valve is connected in the line and senses the loss of hydraulic pressure, and the valve is actuated in response to the pressure drop and retains the work apparatus in a pressurized condition to thereby avoid undesired movement in response to the loss of pressure.

Abstract: A valve fitting insertable in a gas service pipe coupling for operably effecting gas flow interruption in response to either an encountered excess flow or in the event of a piping disconnect from the coupling. A tubular, stepped diameter valve body is sized for receipt within a pipe coupling to define an annular flow passage internally forming an annular seat at an intermediate location within the passage. A more or less T-shaped poppet having a scalloped faced hex head is spring biased in opposition to the gas flow and cooperates with the body seat to interrupt flow in response to an increasing flow pressure being exerted against the head. A pullout plate encircling the poppet shank is biased toward seating the poppet against the body seat for separately arresting gas flow there-past but is prevented from doing so when a pipe section is positioned in place within the coupling.

Abstract: An inlet orifice device to control thruput flow for a pressure regulator, and to prevent increases in inlet pressure from causing variations in outlet pressure. The novel inlet orifice device also permits improved relief valve performance by limiting the maximum available thruput flow to constant levels, within the design range of inlet pressure, regardless of the variation of the inlet pressure supplied within such range.The improved inlet orifice device serves the dual function of controlling the thruput flow by (1) varying the open area (flow limiter area) on the inlet side of the pressure regulator thru the said device and (2) cooperating with the valve to vary the open area (throttling area) on the outlet side of the said device. The improved inlet orifice device includes a fixed nozzle on the inlet side and a control member moveable relative the nozzle and the valve, which valve is disposed on the outlet side and actuated responsive the diaphragm.

Abstract: A conduit arrangement for heavy duty purposes in which a conduit section, such as a length of flexible hose, may be subjected in use to high stresses from pressures attaining several hundred atmospheres, wherein the arrangement provides protection against ruptures and significant leaks and comprises stop valve means at the inlet end of the conduit section, pressure drop type flow sensing means (e.g. an orifice plate or venturi restriction) at the outlet of said section, and pressure comparator means for comparing the pressure drop over the flow sensing means with that over the stop valve means and operative to effect a rapid closing operation of the stop valve means if the ratio of said pressure drops deviates by a certain amount from a predetermined value.

Abstract: A fail-safe sub-surface safety cut-off valve for fluid wells controllable from the surface and suitable for installation at substantially greater depths than prior constructions. The valve assembly is installable and retrievable via wire line technique and utilizes an electromagnetic means to operate either a flapper or a ball cut-off valve. The operating solenoid coil embraces a landing nipple portion of the tubing string and is outside the production flow. This solenoid supplies the power to open either type of cut-off valve and holds the latter open only so long as the solenoid is energized thereby providing surface control of the safety cut-off valve normally and assurance of closing of this valve in the event of power failure through accident or some catastrophe as well as automatic closure if flow velocity increases beyond a predetermined safe value.

Abstract: A drip irrigation valve comprising an outer member having a passage, an inner member receivable in the passage, a groove in one of the members, and a seal carried by the other of the members. Water can be admitted to the passage on one side of the seal. The seal cooperates with the groove to define a restricted flow path. The seal is deformable under fluid pressure into the groove to further restrict the flow path thereby making the valve pressure compensating. The groove is tapered or otherwise has regions of different cross sectional areas so that the flow rate through the flow path can be established by the relative axial positions of the inner and outer members.

Abstract: The valve is adapted to close against the force of a bias spring in response to a substantial increase in the pressure drop through restricted by-pass passages in the valve when a hose is ruptured on the outlet side of the valve. The restriction of the by-pass passages is adjustable by rotation of an internal adjustment ring to thereby determine the flow rate at which the valve is actuated.

Abstract: A pressure regulator particularly adaptable for use in aerosol cans in which a chamber is provided having inlet and outlet ports, and a pressure reactive diaphragm, and a dimensionally changeable inlet throttling body, positioned in the chamber, is dimensionally controlled to close and open the inlet port by variations of pressure in the chamber.

Abstract: It is known to construct fluid dispensing structures which utilize tubes or conduits which expand or contract in cross-section in accordance with the internal pressure of a fluid within such a tube or conduit in combination with one or more flow control members mounted on such a tube or conduit. These devices are constructed so that there is relative motion between such a tube or conduit and such a flow control member as the tube or conduit changes in cross-sectional configuration. Structures of this type may be modified so that they are usable in providing a relatively constant discharge of a fluid regardless of changes in the fluid pressure within such a tube or conduit by utilizing a pressure compensating spring in combination with each flow control member used.

Abstract: A fail-safe sub-surface safety cut-off valve for fluid wells controllable from the surface and suitable for installation at substantially greater depths than prior constructions. The valve assembly is installable and retrievable via wire line technique and utilizes an electromagnetic means to operate either a flapper or a ball cut-off valve. The operating solenoid coil embraces a landing nipple portion of the tubing string and is outside the production flow. This solenoid supplies the power to open either type of cut-off valve and holds the latter open only so long as the solenoid is energized thereby providing surface control of the safety cut-off valve normally and assurance of closing of this valve in the event of power failure through accident or some catastrophe as well as automatic closure if flow velocity increases beyond a predetermined safe value.