Abstract: A low-differential pressure delay valve for vacuum controlled devices is disclosed. The valve has input, output and third chambers with the following: a controlled flow orifice in a separating plate between the input and output chambers; a port in the separating plate; a diaphragm operator sealingly positioned between the input and third chambers; a hollow stem with a seal on one end which stem communicates the output and third chambers by extending through the separating port, input chamber and the diaphragm, the stem is connected to and operative by the diaphragm operator; and, a bias spring of any predetermined force to maintain the port in a closed position is located in either the input or third chambers. The diaphragm operator opens the port to balance the pressures in the input and output chambers when the change in input pressure or vacuum is both greater than the bias force of the spring and too sudden for rapid dissipation through the fixed orifice.

Abstract: A fuel pressure regulator for use in a fuel injection system of a gasoline fueled engine, comprises a fuel distributor pipe having an inlet and a plurality of outlets connected to fuel injections, a casing secured to a portion of the fuel distributor pipe, a diaphragm member secured between the portion of the distributor pipe and the casing, and a fuel discharge nozzle disposed interiorly of the distributor pipe to discharge the fuel out of the distributor pipe, so that the possibility of fuel leakage in the piping of the fuel injection system is effectively decreased, rendering easier assembly of the fuel injection system and lowering the production cost of the same.

Abstract: The pressure regulator keeping a constant difference between the fuel pressure supplied to the injectors and the fuel pressure in the intake manifold of an internal combustion engine, comprises a pressure sensitive diaphragm associated with closure means of the inlet opening of a fuel returning pipe to the vehicle tank. Spherical joint means are disposed between said closure means and said inlet opening in order to maintain a parallel relationship between them.

Abstract: A manually operated sprayer for dispensing liquids from a container includes an improved, self-sealing outlet check valve having a resilient diaphragm convexed toward and in seating engagement with the dispensing orifice. The diaphragm is designed to flex out of engagement with the dispensing orifice when the pressure of the liquid in the pump chamber exceeds the engaging force of the diaphragm, thereby permitting the liquid in the pump chamber to flow out of the dispensing orifice in an atomized form.

Abstract: A back pressure valve employing a spring loaded diaphragm normally closing a discharge port or orifice combined with a push rod extending externally of the valve for coupling with a control actuator with the inner end of the push rod being operatively associated with the diaphragm for using an external control system for varying or regulating the back pressure in a fluid flow line. In one embodiment of the invention, the push rod is engaged directly with the diaphragm assembly, whereas in a second embodiment of the invention, the push rod is engaged with the spring which in turn is engaged with the diaphragm assembly. In both embodiments of the invention, a weak spring is associated with the diaphragm to bias the diaphragm to a closed position to prevent passage of air to a pump intake in the event the system is shutdown with the control actuator and push rod in a position to leave the diaphragm open or to relieve pressure on the heavier main diaphragm spring.

Abstract: A pressure regulator including a valve assembly in which a spherical valve closure element has a flat closure portion for engagement with an annular valve seat and the spherical element permits rotation and accurate alignment of the closure surface with the seat to avoid leakage.

Abstract: A fuel pressure-regulating valve for an electronic fuel injection system for internal combustion engines including a body member having an inlet port and an outlet port, a diaphragm dividing the interior of the body member into two chambers, a piston secured to the diaphragm and having a hollow stem with a fuel passageway therethrough, a valve responsive to the movement of the piston for controlling the communication between the inlet port and outlet port, and a bushing inserted securely in the hollow stem of the piston. Aligned apertures in the hollow stem and the bushing provide communication between the inlet port and the valve, the outer periphery of the bushing adjacent the apertures therein being flattened to provide gaps between the bushing and the hollow stem for preventing reduction of flow through the aligned aperture in case of slight misalignment of the apertures.

Abstract: A non-propellant operated, duration spray dispenser includes structure for mechanically pressurizing the material to be dispensed by pumping it into an expansible bulb for storage under pressure for subsequent dispensing of the material, and a snap-acting positive shut off valve is provided to terminate discharge of the material when pressure falls below a predetermined minimum.

Abstract: A fuel pressure regulator assembly comprising, a housing, a diaphragm separating the housing into a first and second chamber, the housing has a radial inlet extending to the first chamber and a connector having an axial outlet is mounted in the housing and extends axially into the first chamber. The connector supports a sealing ring in a groove. The diaphragm supports a valve member that is adapted to engage the sealing ring, and a spring in the second chamber urges said valve member against the sealing ring.

Abstract: A diaphragm controlled pressure regulator has a control trim fluid pressure applied to the side of the diaphragm opposite to the side thereof in contact with the fluid, the pressure of which is to be regulated, whereby the normal regulator gain value of the regulator is substantially reduced so that the regulated pressure can be maintained substantially constant.

Abstract: A pressure equalizing valve featuring a housing defining a chamber, the housing having first and second passages therethrough opening into the chamber; a valve seat in the chamber surrounding the opening of the second passage thereinto; a diaphragm having its periphery sealed to the housing and forming a wall of the chamber adjacent to the valve seat; resilient means on the side of the diaphragm opposite the valve seat for urging the diaphragm against the seat with a predetermined force, to seal the second passage from the chamber, and hence from the first passage; and an indicator mounted on the housing and having a pressure responsive portion in communication with the chamber for indicating when the air pressure therein is below a predetermined value just sufficient to overcome the predetermined force and unseal the second passage.

Abstract: A check valve for connection between a source of pressure medium and a pressure medium reservoir to allow passage of pressure medium from the source to the reservoir but to prevent reverse flow from the reservoir to the source.In order reliably to prevent reverse flow through the valve when the back pressure on the valve is low, the check valve comprises first (31,32) and second (46,50)individual pressure responsive valves in series in a common housing (10), both valves permitting forward flow of pressure medium but, in conditions of zero forward flow, one (46,50) of said valves being firmly closed in response to high back pressures from the reservoir and the other valve (31,32) being firmly closed at low back pressures from the reservoir.

Abstract: An arrangement for the prevention of excess pressure in housings of shut-off valves with varying pressure loads, in which an independent chamber is provided with two facing openings. These are connected by pressure lines to pipe sockets connected to the shut-off valves. The facing openings are closed by seals which are, in turn, connected gas-tight by elastic elements. Another pressure line discharges into the chamber space located outside the elastic elements, and this pressure line is connected to the interior of the housing of the shut-off valves. The sealing elements which close the facing openings, brace each other through a spring, and the sealing elements are connected gas-tight by a bellows. A center section is located between the sealing elements. Through drill holes in the center section and in the sealing elements, the facing openings discharge into a space enclosed by the center section, the bellows and associated sealing element.

Abstract: A diaphragm divides a chamber into two segments, the first of which includes an air input port and an outlet port formed by a tube which contacts the diaphragm. On the other side of the diaphragm, a variably adjustable spring actuated piston urges the diaphragm to closure against the outlet port. Incoming air pressure deflects the diaphragm away from the outlet port against the spring and air compression, to allow predetermined exhaust air flow. A valved opening behind the diaphragm provides safety against diaphragm tear and malfunction.

Abstract: The anti-bubble safety valve comprises a liquid-admission chamber which is partly delimited by a diaphragm in cooperating relation with a seating provided with an outlet pipe. Thus the liquid which is present within the chamber is directed into the diaphragm-seating interface and passed in laminar flow towards the outlet pipe. The chamber is provided with a passageway to the surrounding atmosphere for the discharge of any air bubble which may have been admitted.

Abstract: A mechanism for smoothing out the flow from the output of a positive displacement pump consists of one or more flexible wall structures consisting of a Belleville spring and a cover plate held over the hole in the Belleville spring by a stepped washer secured to the cover plate set into one or more openings in a fluid container. Means is provided to hold the flexible wall structures in the openings with the convex side extending inwardly into the opening. An elastomeric diaphragm is disposed over the flexible wall structures in sealing relationship with the openings in the body of the fluid container. The flexible wall structures deflect outwardly responsive to fluid pressure within the container, and fluctuations in pressure within the container cause variations in the deflection of the flexible wall structures thereby providing a variable volume within the fluid container.

Abstract: A ventilator which may be operated in either of two manually selected modes, including (1) a first mode in which ventilation of a patient is initiated by inhalation of the patient through a patient adapter and is terminated to allow the patient to exhale when the pressure at the patient adapter reaches a predetermined level; or (2) a second mode in which ventilation of the patient is initiated in the same manner as in the first mode, but in which apneustic hold means are activated when the pressure at the patient adapter reaches the predetermined level and maintains gas pressure and flow in the patient adapter for a short predetermined time thereafter before the patient is allowed to exhale.

Abstract: A fuel pressure regulator assembly comprising, a housing, a diaphragm separating the housing into a first and second chamber, the housing has a radial inlet extending to the first chamber and a connector having an axial outlet is mounted in the housing and extends axially into the first chamber. The connector has an annular groove adjacent its inner end that faces radially outwardly and a sealing ring is positioned in the groove. The sealing ring includes an integral retainer portion which engages an annular groove spaced from the end of the connector to retain the sealing ring in the groove. The diaphragm supports a valve member that is adapted to engage the sealing ring, and a spring in the second chamber urges said valve member against the sealing ring.

Abstract: The invention provides an exhaust valve comprising a valve body, an inlet duct in the valve body for receiving gas to be exhausted through the valve, an exhaust duct in the valve body for exhausting the said gas from the valve, and a valve member subject on the one hand to the ambient external pressure and on the other hand to the pressures in the inlet and exhaust ducts, the valve member moving according to changes in the said pressures between an open position in which there is communication between inlet and exhaust ducts for the exhaustion of gas through the valve and a closed position in which it cuts off such communication; the valve member is preferably mounted in a diaphragm. It also provides a similar valve in which the valve member is instead subject on said one hand to a predetermined maintained fluid pressure, e.g. that within a pressurized chamber. The latter valve can be used to control the pressure in an exhaust line from the exhaust valve.

Abstract: A pressure control valve assembly comprising a rubber diaphragm to which is applied the negative pressure of the engine intake manifold and the exhaust gas pressure of the engine exhaust manifold. The diaphragm of the present invention is formed with a gradual descent sloping down from a valve-actuating central portion to an outer periphery. Adjacent to one portion of the outer periphery of the diaphragm a port opening to the outside of the valve assembly is provided. Thus, any gas ingredients such as condensed water can be expelled along the descent of the diaphragm via the port without gathering on the diaphragm surface which will therefore be free from objectionable oxidation or corrosion.

Abstract: A pressure regulator in which inlet pressure from a pressure medium is regulated by movable control means which occupies a position representative of a balanced condition between a predetermined force applied to the control means and representative of the desired pressure, and a counter force applied through the control means to the primary force application means whereupon the control means allows a part or all of the pressure medium to reach the pressure regulator outlet and whereby the remaining portion or none of the inlet pressure is bypassed through a bypass outlet.The desired pressure level at the outlet of the regulator may be altered by varying the force applied to the control means, typically through the use of weights of varying magnitude.

Abstract: Disclosed herein is a pressure valve for use in any one of several cooling systems for different internal combustion engines also disclosed herein. The pressure valve is connected in series with a source of coolant and an engine coolant jacket for affording coolant flow from the source through the coolant jacket when the pressure in the coolant is above a first value and for affording continued coolant flow through the coolant jacket until the pressure in the coolant falls below a second value lower than the first value. The pressure valve comprises wall means defining a chamber having an inlet and an outlet including a valve seat, together with a valve member having a first surface movable relative to a closed position wherein the first surface sealingly engages the valve seat, which valve member also has a second surface facing away from the first surface.

Abstract: A pressure control valve for regulating the gas pressure in a conduit is composed of two chambers, one of which receives control fluid under well-defined pressure for the purpose of adjusting the pressure of the medium in the second chamber and in the conduit to follow changes of the control fluid pressure. A soft, non-resilient double diaphragm divides the two chambers and the space between the two diaphragms is accessible from the outside and may be supplied with gas or fluid at higher pressure. The valve has a compensating piston which is attached to the diaphragms and glides in a blind bore the end of which communicates with the second chamber in which the pressure is controlled.

Abstract: A pneumatic pressure responsive valve assembly for a pneumatic control system in a vehicle includes a power piston movable due to the pneumatic pressure difference between atmospheric pressure and a signaling vacuum pressure, which piston comprises a valve member cooperable with a valve seat. The valve member is slidably mounted with respect to the power piston. A weak spring disposed between the valve member and the power piston normally seats the valve member on the valve seat and movement of the power piston will unseat the valve member to provide a pneumatic control function.

Abstract: An apparatus for opening and closing the draft hood discharge opening and vent and fuel line of a fluid fuel-fired heating device such as a domestic water heater. The disclosed apparatus includes a diaphragm-type expansible chamber fluid motor assembly positioned in the burner fuel supply line. The motor assembly is mechanically linked to a damper assembly such that the supply of pressurized fuel acts to actuate the motor for opening the damper assembly prior to the motor assembly admitting fuel to the burner. Additionally, when the supply of fuel is terminated, the motor assembly does not close the damper assembly until after the motor assembly stops fuel to the burner.

Abstract: The invention relates to a cut-off valve assembly for an oil burner assembly. The cut-off valve is of the type which is spring biased and rapidly opens and closes above and below a predetermined pump pressure. The rapid closing is to prevent fuel oil from dripping from the nozzle. The valve assembly has an expansible chamber formed with a diaphragm. The chamber has inlet and outlet ports with a valve seat formed on the outlet port. A spring biased adjustment element has a disk shaped portion below the diaphragm which carries a closure member for the outlet port. The face of the closure member is displaceable relative to the disk shaped portion and is of a larger diameter than the diameter of the valve seat for the outlet port.

Abstract: A fuel injection nozzle assembly includes a nozzle body and a compressible valve therein having a valve head that is normally in loaded abutment against a valve seat in the nozzle body to block the discharge of fuel therefrom, the compressible valve further including a stem extending from the valve head which is fixed at its opposite end to the valve body, the stem including a thin wall, tubular compressible stem portion next adjacent to the valve head and connected thereto by an annular shoulder, the compressible stem portion having an outside diameter substantially greater than the diameter of the valve head with the thin wall of the compressible stem portion being sized so that when fuel, in an annular fuel chamber in the nozzle body encircling the compressible stem portion, at a high fuel pressure acts on the annular shoulder, it will cause a reduction in the normal longitudinal extent of the compressible valve to effect unseating of the valve head from the valve seat and, when the fuel in the fuel chambe

Abstract: An exhaust gas recirculation valve comprising a back pressure control chamber connected with the exhaust pipe of an internal combustion engine via a throttling means, a membrane which constitutes a part of the wall defining said back pressure control chamber, the outside surface of said membrane being exposed to the atmospheric pressure while the inside surface of said membrane being closely opposed by an open end of a gas outlet tube so that said membrane and said open end constitute a valve structure for controlling the exhaust gas flow through the exhaust gas recirculation valve.

Abstract: A suction throttling valve is provided which is especially adapted for use as a part of a compact unit consisting of a thermostatic expansion valve, suction throttling valve, and a receiver-dryer, in an automotive air conditioning system. The suction throttling valve is characterized by the incorporation therein of a bellows assembly of unique construction, which includes a bellows, an evacuating tube for evacuating the bellows to a predetermined pressure, and a needle valve. The bellows assembly can be easily and quickly adjusted relatively to the valve housing, in a manner such as to obviate the use of extremely expensive and sophisticated testing equipment. Construction has also been simplified to eliminate certain parts previously used in other valves of this character.

Abstract: An improved cerebrospinal fluid anti-syphoning device for insertion into the human body to provide control and regulation of fluid being transported from the lateral ventricles to another portion of the body. The improved fluid anti-syphoning device includes a fluid housing member which is adapted to contain a pair of check valves which control fluid flow through the housing member and prevents back flow from a downstream area to an upstream area. A central chamber within the fluid housing member encloses a combination fluid egress conduit and flexible diaphragm which in cooperative relation provide for a substantial termination of fluid flow when the down stream pressure becomes too low with respect to the upstream pressure.Specific construction of the fluid egress conduit and the flexible diaphragm provides for negation of possible terminal closure of the flow path through the anti-syphoning device under a wide range of conditions.

Abstract: A diaphragm valve which may serve as an equal pressure valve or as a pressure equalizing valve of a fuel metering and distributing unit for an externally ignited internal combustion engine. The valve has a flexible diaphragm having a clamped diameter and to which a valve plate is connected. The valve plate operatively cooperates with a valve seat of the valve and has a diameter which is as large as possible in relation to the clamped diameter of the diaphragm. The valve also includes a stationary thrust plate which is concentrically disposed relative to the valve seat, which defines a knife-shaped edge which lies in a common plane with the valve seat and which operatively cooperates with the valve plate. The knife-shaped edge has a diameter which is as large as possible in relation to the diameter of the valve plate.

Abstract: An inflation pressure regulator which automatically releases pressure above a predetermined maximum. The regulator has a tubular base extending into the hollow interior of a housing. A collar slideably mounted on the tubular base is biased against the interior of the housing with a coil spring to regulate the pressure. An inflation gas is supplied through the neck of the housing which has a plunger extending through the tubular base. A threaded cavity in the base permits permanent installation on an inflation valve.

Abstract: A physiological shunt system for draining fluid from one region of the human body and discharging it into another in which means is included to resist overdrainage or siphoning of the region as a consequence of low downstream pressures, and a valve to provide such means. The system includes a collector catheter and a discharge catheter, and the valve interconnects these catheters to open the system to flow, or to close it to flow, as a consequence of the position of its closure means which is responsive to the pressure differential between the pressure in the valve as transmitted by the catheters, and a reference pressure such as the atmosphere.

Abstract: An assembly adapted to be anchored at a subsurface location within a tubular well conduit to function as a self-closing safety valve. The assembly includes a flapper valve closure element pivotably mounted in a tubular valve housing and controlled by a pressure sensitive control mechanism. An anchoring means having radially expansible anchoring and sealing members is employed to secure the valve in place and to form a seal which forces fluid in the conduit to flow through a flow passage in the valve housing. The expansible anchoring and sealing means may be retracted to permit retrieval of the entire assembly. The control mechanism includes a pressure charged bellows chamber which moves in response to a drop in the pressure within the well conduit to cause the flapper to close the flow passage.An incompressible fluid contained within the bellows of the control mechanism cooperates with a double acting valve to prevent over extension or over compression of the bellows by extremes in pressure differential.

Abstract: In accordance with an illustrative embodiment of the present invention, a subsurface safety valve assembly that automatically closes in response to a drop in flowing pressure at the valve to a value that is below a set dome pressure, is provided with a flow restriction upstream of the valve that is sized to enable rapid closing of the safety valve in the event of disruption of surface flow lines or the like.

Abstract: A pressure regulator comprises a regulator valve in a casing between a pressure inlet and a pressure outlet, the valve being controlled by a diaphragm subject to inlet pressure and the regulator including a flow restrictor in a passage between the inlet and the diaphragm.

Abstract: A diver's exhaust valve is described that is characterized by small size, ooth flow, and freedom from fouling by foreign matter. The valve comprises a valve member in the form of a spring and water biased diaphragm that separates the exhaust gas from the water which acts to close the valve. The disposition and configuration of flow passages produce continual flushing, while permitting adequate flow with a valve of smaller than usual size.

Abstract: A suction throttling valve is provided which is especially adapted for use as a part of a compact unit consisting of a thermostatic expansion valve, a suction throttling valve, and a receiver-dryer, in an automotive air conditioning system. The suction throttling valve is characterized by the incorporation therein of a bellows assembly of unique construction, which includes a bellows, an evacuating tube for evacuating the bellows to a predetermined pressure, and a needle valve. The bellows assembly can be easily and quickly adjusted relatively to the valve housing, in a manner such as to obviate the use of extremely expensive and sophisticated testing equipment. Construction has also been simplified to eliminate certain parts previously used in other valves of this character.