Abstract: A dynamic control valve assembly for use in filling a liquid carbon dioxide storage and gas delivery system is provided, the assembly comprising: a valve body; an end nut with an inlet port for receiving liquid carbon dioxide; a chamber; an inlet cavity; a liquid port; a gas port; and a dynamic compound valve stem assembly for blocking the gas port while liquid carbon dioxide is delivered through the inlet port and allowing the liquid carbon dioxide to flow through the liquid port for storage in a liquid cylinder, and open the gas port and block the inlet port in order to allow carbon dioxide gasses from boiling liquid carbon dioxide within the liquid cylinder to pass through the gas port for storage in a gas cylinder until system pressure and temperature equilibrium is reached. The dynamic compound valve stem assembly comprises: a stem body having an inlet port poppet and a gas port poppet; an inlet cavity collar; and in some embodiments a collar biasing spring.

Abstract: A swimming pool water leveler system. Implementations may include a water leveler comprising one or more of the following aspects: separate fill and sensing chambers within the water leveler housing; logical water level adjustment features that provide a tactile indicator of water level change; a continuous balance line and overflow line; a water supply line seal valve with a cup seal; a reducer plug in an outlet between the sensing chamber and the balance line to assist in junk removal; and the ability to pressure test the balance line and overflow line at the same time.

Abstract: A method for opening a port through the wall of a ported sub including providing a sub with a port through its tubular side wall and providing a hydraulically actuatable valve to cover the port, the valve being actuatable to move away from a position covering the port to thereby open the port. The method further includes increasing pressure within the sub to create a pressure differential across the valve to move the valve toward the low pressure side, while the port remains closed by the valve, thereafter reducing pressure within the sub to reduce the pressure differential and driving the valve to move it away from a position covering the port.

Abstract: An apparatus for indicating a leak in a beverage dispensing system and sealing a leak in a beverage dispensing system includes a deactivating means including a channel, a sealing ball, a sealing element and a reset means. The sealing ball and sealing element are located within the channel. When a leak is present, the sealing ball is moved from its resting position. Once the leak reaches a predetermined level, the sealing ball is pressed against the sealing element by the force of the gas in the chamber. This seals the chamber and prevents further gas flow through the system.

Abstract: A downhole valve that operates on turning of a member having a passage through it with a control system also features a passage from above an uphole seat for the member which communicates to the isolated passage within the member when the valve is closed. The passage features a check valve assembly that preferably has redundant sealing features and filters to prevent debris entry. Pressure applied from above the closed member gets through the check valve assembly to equalize the higher pressure below the ball with the pressure raised in the ball from pressure application at the surface. Removal of the applied pressure reseats the check valve or valves to allow the hydraulic system to rotate the member while the member is no longer subject to a high differential pressure.

Abstract: A valve assembly includes an automatic excess flow shut-off mechanism for preventing excess flow between an inlet and an outlet of the assembly. The excess flow shut-off mechanism is adapted to automatically stop fluid flow through the valve assembly when the flow exceeds a specified flow rate. The excess flow shut-off mechanism prevents flow when it's set and allows flow when it's reset. The valve assembly also includes a manual set mechanism for setting the excess flow shut-off mechanism even when there is no excess flow. The valve assembly additionally includes a manual reset mechanism for resetting the shut-off mechanism and for allowing excess flow.

Abstract: A filling system for a toilet tank prevents continual flow to the tank in the event of a leak from the tank by providing a hydraulically actuated safety valve for halting water flow to the filling valve in the event that the water flow continues for a time longer than an expected time of filling. The safety valve has a valve member connected to a piston mounted in a cylinder defining a first chamber on one side of the piston and a second chamber on the other side. A venturi in the supply duct provides in a low pressure chamber of the venturi a water pressure lower than the supply pipe pressure such that a pressure difference across the piston caused by the difference in pressure between the supply pressure and the low pressure chamber causes the piston to move from the first end toward the second end. A flow control orifice regulates a rate of flow of water such that a time of movement of the piston is greater than an expected time required to fill the toilet tank.

Abstract: A fitting for connection to a pipe includes a sleeve, in which a body is axially displaced along a sleeve axis, whereby the body has a drill for drilling into the pipe and/or a valve body of a valve. The fitting also includes a branch sleeve, located in particular on the sleeve and to which a branch line can be connected. The fitting is easily constructed in such a way that safety requirements are reliably met and such that a connection to a branch line can be easily established if necessary. According to another aspect of the fitting, a locking device which includes an actuating element is located in the branch sleeve, in such a way that the locking device is actuated by means of the axially displaceable body in the sleeve.

Abstract: An automatic shutoff valve is provided. The valve is preferably constructed of a check valve (which is normally shut) and a shutoff valve which is open during static, no-flow, operation. Upon initiation of flow, even a drip flow, the check valve opens, and the pressure differential from the inlet to the outlet causes a piston in the shutoff valve to move toward a shut position. As long as the pressure differential stops before the piston closes, the shutoff valve resets to the fully open position. However, if the shutoff valve shuts, it preferably must be manually reset.

Abstract: A fluid flow control valve includes a housing having a fluid inlet and a fluid outlet, which define a flowpath therebetween. Within the housing is a chamber located in the flowpath between the fluid inlet and the fluid outlet. A valve member is mounted within the chamber from movement between an open position, allowing for flow along the flowpath, and a closed position, which prevents such flow. The valve member is biassed to the open position. The fluid control valve further includes a device for regulating fluid pressure to enable the fluid pressure to be set on the inlet side of the valve member.

Abstract: A fluid valve (10) that interrupts the flow of fluid when backpressure ceases. The valve (10) consists of a valve body (20) having an inlet (22), an outlet (24), a piston chamber (32), and a backpressure port (34). The port (34) is located between the outlet (24) and the chamber (32), and a stem bore (36) is disposed within the valve body (20) between the chamber (32), and the inlet (22) and the outlet (24). A piston (40) that includes a restricting stem (42), is confined within the chamber (32) and the stem (42) is positioned within the stem bore (36). The stem (42) restricts fluid flow when there is no backpressure, but when backpressure exists the stem (42) is forced away from the inlet (22) and the outlet (24) by the piston (40) thereby permitting a full flow through the valve (10). An adjustable compression spring (68) engages the piston (40) urging the stem (42) into the stem bore (36) when no backpressure exists.

Abstract: A valve operable with an associated fluid delivery system having fluid flow therethrough includes a housing, a valve body and a resetable excess flow valve. The housing has a first passage and the valve body is disposed along the first passage and including a wall at least partially defining a second passage. The excess flow valve is supported along one of the first and second passages. The valve body is displaceable between a first position permitting flow through the second passage and a second position substantially shutting-off fluid flow and resetting the excess flow valve.

Abstract: A surge suppressor and safety shut-off valve is described which automatically shuts off fluid flow in response to a sufficient pressure differential across the valve. The shut-off valve comprises a valve body adapted for use within a fluid distribution system through which a predetermined flow of a fluid is nominally allowed to pass. A flow restricting means is disposed therein that reduces the maximum flow when triggered by a sufficient pressure differential between inlet and outlet. By way of example, the flow restricting means is preferably provided by a poppet which is slidably engaged within the valve chamber to restrict fluid flow therethrough. The poppet is preferably adapted with a very low volume bypass port through which opposing pressures at valve inlet and outlet may be equalized for automatically resetting of the valve after the surge has passed, or a rupture has been repaired.

Abstract: A flow control valve is disclosed having a cylindrical housing having inlet and outlet ends and a central portion there between; a piston slidably disposed within the central portion and having a wall at one end thereof; a piston rod having a base and a top, a filter located within the rod, and a spring surrounding the rod for urging the rod and the piston toward the inlet end; and a flow restrictor through which the rod is able to pass. The flow restrictor has a first portion with one or more inlet ports and a second portion separated from the first portion by an annular ridge.

Abstract: A flow control valve is disclosed having a cylindrical housing having inlet and outlet ends and a central portion there between; a piston slidably disposed within the central portion and having a wall at one end thereof; a piston rod having a base and a top, a filter located within the rod, and a spring surrounding the rod for urging the rod and the piston toward the inlet end; and a flow restrictor through which the rod is able to pass. The flow restrictor has a first portion with one or more inlet ports and a second portion separated from the first portion by an annular ridge.

Abstract: A surge suppressor and safety shut-off valve is described which automatically shuts off fluid flow in response to a sufficient pressure differential across the valve. The shut-off valve comprises a valve body adapted for use within a fluid distribution system through which a predetermined flow of a fluid is nominally allowed to pass. A flow restricting means is disposed therein that reduces the maximum flow when triggered by a sufficient pressure differential between inlet and outlet. By way of example, the flow restricting means is preferably provided by a poppet which is slidably engaged within the valve chamber to restrict fluid flow therethrough. The poppet is preferably adapted with a very low volume bypass port through which opposing pressures at valve inlet and outlet may be equalized for automatically resetting of the valve after the surge has passed, or a rupture has been repaired.

Abstract: A velocity fuse for a hydraulic line shuts off fluid flow when the flow rate exceeds a preset flow value. The shut off value may be adjusted while the fuse is mounted in the hydraulic circuit. A damping mechanism of the dash pot type prevents the fuse from responding to flow surges of short duration. A poppet or piston within a tubular housing reciprocates between an open position held by a spring and a closed position when flow through an adjustable aperture causes a great enough pressure drop to overcome the spring bias. The damping mechanism is unaffected by the flow rate setting.

Abstract: A flow control valve is disclosed having a cylindrical housing having inlet and outlet ends and a central portion there between; a piston slidably disposed within the central portion and having a wall at one end thereof; a piston rod having a base and a top, a filter located within the rod, and a spring surrounding the rod for urging the rod and the piston toward the inlet end; and a flow restrictor through which the rod is able to pass. The flow restrictor has a first portion with one or more inlet ports and a second portion separated from the first portion by an annular ridge.

Abstract: An ammonia excess flow valve has a seal ring (24) slidably positioned around at least two retainer vertical members (22B). A disk (26) has a disk central opening (26A) and a disk pin opening (26B) therethrough. The disk (26) is positioned adjacent to and below a retainer (22). A conduit (28) sealably connected to the disk (26) over the disk pin opening (26B) extends upwardly therefrom. The conduit (28) functions to permit the ammonia excess flow valve (10) to be reset by equalizing pressures on both sides of the disk (26) once excess flow that trips the ammonia excess flow valve (10) is remedied, minimizing creation of vapor.

Abstract: A flow sensor device includes a main passage having a normally open shut off valve therein which is configured to shut off at a predetermined rate of air flow therethrough. The shut off valve includes a seating structure and a centering structure positioned within the main passage, a sealing member being positioned between the seating structure and centering structure. The sealing member is biased toward the centering structure by a resilient member. Air flow through the main passage exerts a force on the sealing member which pushes the sealing member toward the seating structure. When the force caused by the air flow exceeds the opposing force of the resilient member, the sealing member contacts the seating structure in a sealing relationship such that air flow through the main passage is substantially eliminated. The flow sensor device may also include a controllable release valve and/or a controllable reset valve, enabling control of the shut off valve of the main passage.

Abstract: The invention intends to provide a relief valve which can prevent malfunction caused by generation of negative pressure lowering the minimum pressure to be originally maintained by a load circuit.Maloperation of a relief valve 401 is prevented by allowing a check valve 423 for preventing a backflow from a main valve element 410 and pilot valve element 412 side to a load port side 402 to be intervened at a pressure chamber 408 between a load port 406 connected to a load circuit, a main valve element 410, and a pilot valve element 412 and by applying a hydraulic lock when negative pressure lower than the minimum pressure to be originally maintained by a load circuit is generated. And by communicating a downstream chamber 425 downstream of the check valve 423 to a return port 407 with a reset oil passage 429 which is opened and closed by a reset valve 430, the hydraulic lock is designed to be released.

Abstract: Each gas expansion station of a distribution network fed with gas in accordance with the invention comprises at least one regulator-expander provided with a valve member disposed on a main duct, a pilot valve, a safety valve provided with a valve member disposed in the main duct, and a differential member co-operating with the pilot valve and the safety valve which is disposed upstream from the regulator-expander to close the safety valve automatically under the control of the pilot valve in the event of the downstream pressure in the main duct downstream from the expansion station concerned exceeding a predetermined threshold value, and to operate automatically, after the downstream pressure has been restored to below the predetermined threshold value, either to reopen the safety valve if the regulator-expander of the expansion station concerned is not itself giving rise to a leak at its valve member, or else to keep the safety valve closed if the regulator-expander is not itself providing gastight sealing a

Abstract: A flow control valve for an internal combustion engine fuel delivery system that includes a valve body having a fuel inlet for connection to a fuel supply and a fuel outlet for connection to the fuel pump, so that the pump can draw fuel under vacuum from the supply through the valve and deliver fuel to an engine. A valve element is disposed within the valve body between the inlet and the outlet, and springs urge the valve element to a closed position within the valve body. A diaphragm is also disposed within the valve body between the valve element and the fuel outlet, and is coupled to the valve element such that suction vacuum applied by a fuel pump to the valve body outlet operates the diaphragm to open the valve element against forces applied by the valve springs to permit flow of fuel from the supply through the valve to the pump.

Abstract: A pneumatic fluid flow limiting device which is pressure compensated and resets automatically when the pneumatic fluid driven device is shut off. Pressure compensation is accomplished by a vented differential diameter chamber and reset is accomplished by a bypass orifice in a spool valve which further may be variable in flow to accommodate different flow requirements for tool operation.

Abstract: The present invention comprises of a reset mechanism particularly suited for use within magnetic valves. The reset mechanism will insure the desired return of a magnetic valve to its normal position even though there exists an imbalance of fluid pressure between the magnetic valve's inlet and outlet passages. The reset mechanism's principle of operation is the creation of a pressure differential across a reciprocating valve to return the valve to its normally open position in a snap action movement. After said magnetic valve has dosed in response to a pre-determined excess of fluid pressure, thus blocking off communication between the inlet and outlet passages, a reset valve is actuated to establish a communication through a reset passage that creates a pressure differential that eliminates any opposition to and effectuates the immediate return of the magnetic valve to its normally open position in a snap action movement without having to equalize pressure across the magnetic valve.

Abstract: A hydraulic automatic shutdown valve system is described to minimize the cost and clean up associated with hydraulic fluid spills. The valve system senses a pressure drop in a fluid system and diverts fluid away from the failed area of a pressurized hydraulic system.

Abstract: A well pressure monitoring system in which a hydrocarbon fluid is being produced through a Christmas tree or similar flow controller apparatus. Well pressure is transmitted through a tap-off communicated to a pressure sensor. The pressure is thereafter transmitted to a base or control station. To avoid a major uncontrolled flow of the hydrocarbon from the well in the event of inadvertent breakage or accident to the monitoring system, an excess flow control valve is positioned between the well flow and the pressure sensor. The excess flow valve functions to cut off fluid flow, but is provided with a vent passage in the valve actuator through which a minimal amount of the hydrocarbon can escape. When the damage to the monitoring system has been overcome, the vent passage will allow a downstream pressure build-up in the closed system, thus permitting a biasing spring to automatically reset the valve to open and operable position, thereby stabilizing the pressure acting on the actuator.

Abstract: An elastically movable valve having a through hole is installed at a required position in the path of a fluid. At the time of normal operation, the fluid is allowed to pass through the through hole, but if the fluid pressure is increased to a certain level over that of normal operation, the valve is elastically deformed by this high fluid pressure allowing it to come into contact with its valve seat and stopping the fluid flow.Since it has no sliding part for the motion of a movable valve. The dust are not generated and, the fluid used in a fluid circuit requiring a high degree of cleanness is always guaranteed to have a high degree of cleanness. As there is no space for the fluid to stagnate, the new fluid is not partially contaminated with the previous fluid after exchanging fluid.

Abstract: This hydraulic valve has a housing (2) with a feed line (12) and a discharge line (14) for a fluid. A sealing point is provided between the feed line and discharge line. A spring acts in the closing direction on the sealing point via a piston.The aim is to create a hydraulic valve which requires no additional energy source. This is achieved when the piston (8, 23) can be moved in the opening direction merely by a total of the pressures present in the feed line (12) and in the discharge line (14).

Abstract: A pressure detecting device in a torque control wrench has a rotor to be rotated by high pressure air, an output shaft and a device for generating impulse torque with the use of oil pressure on the output shaft due to rotation of the rotor. The device has a liner rotated by the rotor rotatably mounted on the output shaft. The device forms a high pressure chamber and a low pressure chamber in the liner for the generation of impulses on the output shaft, and has a hole therein having first and second ports communicating with the high and low pressure chambers, respectively. A valve is disposed in the hole for adjustably regulating the flow of oil from the first port to the second port and for generating a shut-off signal. The valve has a valve shaft adjustably mounted in the hole, having a passage therein communicating with the high pressure chamber. The passage has an opening at an end of the valve shaft.

Abstract: The safety valve assembly of the present invention for use in a closed fluid system comprises a valve housing including a central throughbore divided into an inlet end and an outlet end which communicate with one another via an axial passageway parallel thereto. Access to an inlet of the passageway is controlled by a valve element which is movable between a standby position solely in response to a differential fluidic pressure developed when a leak develops in the closed fluid system downstream of the safety valve assembly to isolate the leak from the remainder of the system. A bleeder valve assembly is also provided to return the assembly to a standby position thereof once the downstream leak has been eliminated.

Abstract: A device for use as a safety device to cut off the water supply to a house or building in the event of overly high water consumption due to a leak or break in the plumbing in the house or building is disclosed which has only three moving parts and is of simple and inexpensive to manufacture construction. The safety flow control device of the present invention has a three position selector valve which selectively either allows water to flow freely through the safety flow control device as if it were not there, diverts water through a safety flow chamber, or acts as a shutoff valve by preventing the flow of water into the main water line entrance of the house or building.

Abstract: An automatically and independently operating safety device for triggering a total or partial closure of a guard or safety valve member when the velocity of a fluid circulating in a conduit attains a predetermined dangerous value. The device senses the static and total pressures of the fluid within the conduit and supplies these pressures which control the movement of a piston and rod wherein the movement of the rod in response to fluid velocities which are dangerously high will initiate the actuation of the safety valve.

Abstract: There is disclosed a reset mechanism particularly adapted for use within a magnet valve in which the reset mechanism comprises a passageway within the valve housing connecting the inlet and outlet passages in which a reset valve normally interrupts a communication between the inlet and outlet side of the said reset passage to permit normal operation of the magnetic valve and to permit normal fluid flow through the inlet and outlet passages thereof prior to movement of said magnetic valve from its normally open to its normally closed position.

Abstract: A runaway valve for an air-driven material pump that shuts off air flow to the pump when air flow rate exceeds a predetermined setting to prevent pump damage, wherein the valve includes a flow-responsive poppet valve member and an axially movable sleeve finely adjustable about a first position to select flow rate, and movable to a second position to interconnect the upstream and downstream sides of the poppet valve member to effect reset. A closed chamber with a vent hole buffers the upstream side of the poppet valve member from inlet pressure to delay valve closing and compensate for pressure transients. In its reset position, the sleeve isolates this chamber from inlet pressure to achieve faster reset.

Abstract: The high pressure of a gas transport network must be reduced before the gas is admitted to a distribution network to which consumers, e.g. household appliances are connected.This reduction is carried out by a gas pressure control installation. If this installation fails, conduit failure, appliance failure, explosion and fire may occur.A known safety device has a closing spring, which closes a valve if the gas pressure unacceptably rises which causes release of the spring by the gas pressure. The movement releasing the spring is influenced by friction which may have an uncertain value. The invention eliminates friction in that the reduced gas pressure acts on the valve via spring loaded membranes, namely a measuring membrane and an actuating membrane.

Abstract: A gas safety valve is provided which has a valve chamber within a housing, and a gas inlet and outlet respectively communicating with an inlet and outlet end of the valve chamber. Valve means are disposed in the valve chamber for allowing gas to flow from the inlet to the outlet when the valve means is in an open position, and preventing gas flow when the valve means is in a closed position at either end of the valve chamber. The valve means may comprise a piston having a tortuous gas transmitting opening therein, the resistance to gas flow caused by the tortuous opening rendering the valve means responsive to slight variations in gas pressure differential between the inlet and the outlet. Resilient means are provided which extend between the outlet and the valve means.

Abstract: An automatic shut off valve comprising a housing having a main inlet, an outlet, a user inlet and a user outlet. A valve assembly is contained within the housing and is movable between an open and a closed position. In its open position, the user inlet and outlet are fluidly connected in series with the main inlet and main outlet while, conversely, in its closed position, the valve assembly sealingly closes and isolates both the user inlet and outlet from the main inlet and main outlet. A compression spring urges the valve assembly towards its closed position while a fluid flow rate greater than a predetermined amount into the user inlet retains the valve assembly in its open position. Consequently, in the event of an interruption or blockage of the fluid flow between the user inlet and outlet, the compression spring snaps the valve assembly to its closed position thus isolating the inlet and outlet from the main inlet and terminating fluid flow through the shut off valve.

Abstract: The safety device makes it possible to cut the water supply off quickly when there is a very low flow of water such as occurs when there is a leak, to cut off the water supply after predetermined time with normal water consumption, and to cut the water supply off very quickly when a certain predetermined maximum flow is exceeded as would occur with a fractured pipe. The safety device is automatically returned to its initial position when the water consumption is stopped and the shut off is first indicated by a significant reduction in flow. The device can also be manually returned to its initial position after a shut-off.

Abstract: A flow limit shutoff valve for automatically shutting off all flow between a source of high-pressure gas and a pressure regulator when that flow exceeds a preset flow rate. The flow to the shutoff valve is metered, resulting in lowering the pressure downstream from a metering valve. A main valve has a first chamber on one side downstream from the metering valve, and the valve's outlet is connected to this first chamber. A second chamber on the opposite side is connected to the inlet pressure. The main valve is biased in the opposite direction from that urged by the inlet pressure, so as normally to keep it open, but the main valve snaps shut when the inlet pressure forces overcome the sum of the downstream gas pressure forces and the biasing forces. To enable reopening, a bypass system connects the upstream side of metering valve to the first chamber, while there is a manually operated closure for manually opening and closing off the bypass to the first chamber.

Abstract: A hydraulic system includes a pump, a reservoir, and an actuator system. A hydraulic circuit breaker is arranged to compare fluid flow to and from the actuator system and to shut off this flow in the event the flow to the actuator system is greater than the flow returning from the actuator system by more than a predetermined differential, thereby indicating a leakage condition. A hydraulic circuit breaker reset device is hydraulically connected to the actuator system and to the circuit breaker. When the circuit breaker is in a shut-off condition, the reset device continuously pressure tests the actuator system. If the pressure in the actuator system increases to indicate the absence of fluid leakage, the reset device responds to the pressure increase in the actuator system to provide a reset signal to the circuit breaker. After the circuit breaker is reset to its normal operating position, a timing piston returns the reset device to its normal operating condition.

Abstract: A fluid fuse operable to shut off fluid flow upon rupture of fluid conducting line downstream of the fuse. The fuse is actuated by two forces generated by pressure differential caused by sudden decompression of the fluid and developed across two variable, sharp edge, viscosity insensitive orifices, positioned in series and separated by a flow cut-off and sealing surface. The closing force, generated by the pressure differential of the upstream orifice is dominant and increases with the displacement of the closing member in a predetermined manner, permitting the use of a high preload and high rate opposing spring, at relatively low pressure differentials. The sealing surface of the fuse is provided with limited freedom of alignment to permit tight sealing. The fuse assembly includes a manually adjustable bypass arrangement and a pressure peak attenuating control.

Abstract: A safety shut-off valve opening a flow path between the primary and secondary sides in case of usual operation, while shutting off the aforesaid path in response to an emergency shut-off signal, and particularly such safety shut-off valve cannot be reset unitl it is confirmed that there is no more leakage of gas on the secondary side of the shut-off valve after the shut-off action was once effected, thereby to attaining a very high safeness.

Abstract: A safety valve (14) adapted to be inserted within a flowline (10) comprises an elongate valve body (16) having central bore (24) with a fluid inlet (40) and a fluid outlet (42) in fluid communication with the bore (24). A slidable valve element (50) having a fluid passage (62) therein is mounted within the bore (24) and is slidable between the seated and unseated positions. A stop member (108) is mounted on the valve body (16) for relative movement between extended and retracted positions and has a stem which extends within the bore (24) along the longitudinal axis of the valve body (16). During normal operation valve element (50) is in a seated position and stop member (108) is in a retracted position, and thus, fluid flows from the fluid inlet (40) to the fluid outlet (42).

Abstract: A device for closing a fluid flow passage in response to a decrease in vacuum pressure existing in the passage. The device comprises a fluid flow passage with a seating therein. A diaphragm is located so that one face thereof can locate on the seating to close the passage. A chamber is formed partially by the or at least part of the other face of the diaphragm. In use the diaphragm is maintained away from said seating by a higher pressure in the chamber due to a pressure differential existing between chamber and passage. Venting means open the chamber to atmosphere, and means are provided to seal said venting means. Actuating means are provided and engage with said diaphragm when the pressure differential exists. Accordingly when the pressure differential is altered by a decrease in the vacuum in said passage, the resultant movement of the diaphragm causes the actuating means to operate the sealing means such that the venting means vent said chamber and enables the diaphragm to locate on the seat.

Abstract: A face mask is connected to a source of breathing fluid through a pressure-demand regulator and a supply line. The regulator admits breathing fluid to the mask on demand and maintains a positive pressure within the mask at all times to prevent inflow from the surrounding atmosphere. The regulator has a flow capacity considerably greater than that normally required, even when gasping or breathing heavily. An automatic shut-off device in the supply line upstream of the regulator permits the peak flow of a predetermined breathing requirement but is responsive to abnormal flow conditions, as for example where the mask is removed from the wearer, to close the supply line and thereby prevent wasting of the air breathing fluid supply. The apparatus can be manually reset to normal operation and will reset itself after the mask is repositioned on the wearer.

Abstract: A pressure demand breathing apparatus having a facemask connected through a pressure demand regulator with a shut-off device that operates automatically to interrupt the supply of air to the mask when the facemask is removed. The device operates with a time delay to permit momentary user-induced high flow rates without interrupting the supply.

Abstract: This shower head serves to replace existing shower heads, and when the water becomes too hot for safety, it is so designed, that it will stop the hot water flow from striking the bather. It consists primarily of a fixed thermostat, which, when expanded, will cause a disc attached to a piston to be, by water pressure, urged against an opening, to cut off the water flow on the bather, and the hot water is then shut off at its source by the bather. The head further includes a lower passageway leading to a depressible relief valve, for releasing the hot water from the thermostat area, so as to enable the thermostat to reset.

Abstract: An auxiliary safety valve for interposition in a pressurized fluid system including a cylindrical valve body having threads for connecting the valve body to the outlet end of a pressurized container for communication therewith. The valve body has a main bore adapted to align with the outlet end of a pressurized container and an auxiliary bore formed at an acute angle to the main bore and joining with the main bore. A ball seat is formed substantially where the auxiliary bore joins the main bore, and a ball mounted in the auxiliary bore for movement therein and to said ball seat to close off the main bore when the pressure flow through the main bore exceeds a predetermined level of flow together with threads on the valve body for connecting the valve body to an outlet control valve for communication therewith.The valve body also includes a conduit with a valve control therefor which bypasses the auxiliary valve for equalizing pressure within the container and at a point outwardly of the auxiliary valve.

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.