Abstract: A fluid proportioning valve meters flow of pressurized inlet fluid in proportion to a pressure drop between the inlet and outlet of the valve. A pressure acutated, return biased poppet valve is actuated by the fluid above threshold fluid pressure to meter fluid to the outlet against spring force. The poppet is annular and has a circular metering edge that controls flow through circumferential orifices in a valve guide. Smooth stable flow is achieved by shearing action of the metering edge over the orifices. Sliding point contact with the poppet valve by non-ferrous convex buttons to eliminate galling and reduce particle contamination within the valve.

Abstract: A substrate storage container includes a container body for accommodating and aligning semiconductor wafers, a door which opens and closes the front of the container body and a pair of valve units disposed at the bottom of the container body for controlling gas flow. Each valve unit includes a fixed sleeve for gas flow, fitted in a rib of a through-hole of the container body, a holding sleeve fitted in the through-hole of the container body with an o-ring interposed therebetween and mated and threaded with the fixed sleeve, a check valve built between the fixed sleeve and the holding sleeve, leaving a clearance, an elastically deformable element for opening and closing the check valve, an interior lid sleeve for gas flow, opposing the check valve and supporting the elastically deformable element, and a filter interposed between the holding sleeve and the interior lid sleeve.

Abstract: A valve for controlling flow of a primary fluid in a primary flow channel is defined in a valve region by a deformable membrane. The primary flow channel includes a core in the valve region, and a housing which defines a void outside the primary flow channel in the valve region thereof. The valve includes a device for driving a displacement fluid into or out of the void or both, to vary the pressure difference across the deformable membrane between the primary flow channel and the void, and so as to vary the space that is available between the deformable membrane of the primary flow channel and the core for the primary fluid to flow along the primary flow channel. A pump can include a valve as described above as a driver valve, together with an inlet valve and an outlet valve.

Abstract: A pressure reducing valve, for a clamping device in particular, has a control plunger, which is acted upon by a regulating pressure against an adjustable force, and a closing body which is preloaded against a valve seat in the closing direction by the force of a compression spring. The closing body is movable from its closed position into its opened position, past the valve seat, via a transfer element, thereby allowing control of the flow of pressure medium from a pressure inlet to a regulating pressure outlet. The control plunger is designed as a hollow piston in order to accommodate the closing body, and it forms the valve seat for the closing body which is guided in the control plunger.

Abstract: A pressure reducing valve comprises a valve support member provided with a water passage, a valve seat fitting on the portion of the valve support member primary side relative to the secondary side end of the water passage, a cup-shaped valve body fitting on the secondary side end of the valve support member to slide and capable of abutting the valve seat at the open end, while enclosing the secondary side end of the water passage at the cylindrical portion, a seal member for sealing the sliding contact part between the valve support member and the valve body, and a resilient member disposed in the valve body to force the valve body away from the valve seat.

Abstract: A check valve for a pump of an electronically controlled brake system includes a valve body provided with a fluid path, a spring seat placed in an outlet of the fluid path of the valve body, a valve rod fitted at a lower end thereof into an inlet of the fluid path of the valve body, a valve piston provided with a through hole that is selectively opened and closed by an upper end of the valve rod, as the valve piston moves upward and downward along an inner wall of the valve body, and a spring interposed between the spring seat and the valve piston.

Abstract: A water pressure regulator for a watering system of an animal house is provided with a water inlet member comprising a watering path and a flush path. The watering path is operably engaged by the regulating valve. The inlet member is manually movable relative to the housing, to position the watering path outlet relative to the regulating valve to prevent the regulating valve from engaging the inlet member, thereby placing the regulator in a flush mode. The flush path has a water exit into the regulator spaced from the watering path port, and hence is not engagable by the regulating valve. A flush valve is provided in the flush path, and is moveable between a closed position in which the regulator will operate in a drinking mode and an open position in which the regulator will be in a flush mode. An actuator is provided which is operated by a control system to allow for automatic flushing of the watering line according to a predetermined schedule.

Abstract: A valve arrangement in a hydraulic circuit comprises a longitudinal duct 3 and a transverse duct 2. A throttle slide 10 can be displaced in the direction of the longitudinal duct 3. Arranged in the throttle slide 10 is a valve piston 25, by means of which the flow through the hollow throttle slide 10 can be enabled or blocked. The flow of hydraulic fluid takes place through two groups of passage holes 33a, 35a, which are arranged in the throttle slide 10. The interaction of pressure and flow direction of the hydraulic fluid, and also the restoring force of a slide spring 20 and a piston spring 30, achieves a situation where hydraulic fluid can flow through the valve arrangement in both directions but that a throttling action occurs only when the hydraulic fluid flows from the transfer duct 2 to the longitudinal duct 3 under increased pressure.

Abstract: A valve is provided having a housing with an inlet and an outlet. Within the confines of the housing is a fluid flow path that allows for fluid communication between the inlet and the outlet. The valve includes a valve element that is movable to and from a position where it blocks fluid communication along the fluid flow path, thereby closing the valve. The valve also includes a resilient member provided in a chamber of the valve that is fluidly sealed from the fluid flow path. The resilient member urges the valve element to move to the position for closing the valve. When the pressure of fluid entering the inlet exceeds a preselected amount, the pressure of the fluid overcomes the urging of the resilient member and the valve element moves towards a position that allows fluid communication along the fluid flow path, thereby opening the valve.

Abstract: The inline flow control device includes housing with a tubular portion coaxially aligned with the tubular portion of a fitting threaded to the housing. A piston has a bore extending therethrough with the tubular portions extended thereinto in axial spaced relationship, the fitting tubular portion mounting a valve seat to abut against a piston internal shoulder when the piston has axially moved relative to the tubular portions to a blocking position to block fluid flow through the device. The piston enlarged diametric portion bottom surface is in fluid communication with the piston bore in both of the piston positions but not in fluid communication with the body high pressure inlet when the piston is in its blocking position. A spring resiliently urges the piston in its blocking position. Two embodiments are pressure regulators while the third is a balanced valve.

Abstract: A flow-through pressure regulator having a housing, and a divider. The housing includes an inlet and an outlet disposed along a longitudinal axis. The divider separates the housing into a first chamber and a second chamber, and includes a seat, a diaphragm, a retainer and a flow diffuser member. The seat defines a passage between the first and second chambers. The diaphragm extends between the housing and the seat. The retainer secures the diaphragm to the seat, and may include a base portion proximate the seat, an intermediate portion extending along the longitudinal axis from the base portion toward the outlet, an end portion extending from the intermediate portion, and at least one aperture having a flow axis that permits fluid communication between the passage and the second chamber. The flow diffuser member is disposed between the passage and the outlet, and defines a plurality of flow paths.

Abstract: A flow-through pressure regulator includes a retainer that secures a diaphragm relative to a seat, and includes a cylindrical portion, an axial end portion and an annular portion. The cylindrical portion extends about a longitudinal axis and is fixed with respect to the seat. The axial end portion extends from the cylindrical portion and extends generally orthogonal relative to the longitudinal axis. The axial end portion includes a plurality of apertures that permit fluid communication and are selected so as to reduce noise due to fluid flow.

Abstract: A reducer valve for pressurized gas includes a piston (2) displaceably mounted in a valve housing (3) against the force of a pressure spring (8). At one end, the piston (2) is subjected to pressure by the back pressure via a control pressure line (20) whereby the gas, which flows in from a pressurized gas source via a gas inlet (17), is throttled. The reducer valve is improved so that a specific gas volume remains in the connected pressurized gas source below a minimum pressure. A directional valve (24, 25) is provided in the control pressure line (20) and opens above a predetermined limit pressure.

Abstract: A flexible connector incorporates an excess flow shutoff at its inlet to prevent uncontrolled flow in the event of a failure such as rupture or separation of the connector. A shutoff sleeve moves in a body between an upstream, open position and a downstream, closed position. A spring biases the shutoff sleeve toward the open position. The sleeve includes a flow metering passage, and a pressure drop resulting from excess flow through the passage moves the sleeve to the closed position against a shutoff seat. A time delay is provided by a damping system including a variable volume damper chamber defined in part by a flexible bladder. Upstream pressure is communicated to the damper chamber by a restricted flow passage provided by metal to metal contact of a washer against a body surface.

Abstract: A pressure regulator includes a housing, a divider including a first valve member, and a second valve member. The housing includes an inlet and an outlet, and defines an interior volume. The divider separates the interior volume into first and second chambers, and included the first valve member, a diaphragm, and a retainer. The diaphragm extends between the housing and the first valve member. Fluid communication between the first and second chambers through the diaphragm being prevented. The retainer secures the diaphragm relative to the first valve member, and the retainer is press-fitted with respect to the first valve member. The second valve member is arranged between first and second configurations relative to the first valve member. The first configuration substantially prevents fluid communication between the inlet and the outlet, and the second configuration permits fluid communication between the inlet and the outlet.

Abstract: A flow-through pressure regulator having a housing, and a divider. The housing includes an inlet and an outlet disposed along a longitudinal axis. The divider separates the housing into a first chamber and a second chamber, and includes a seat, a diaphragm, a retainer and a flow distributor member. The seat includes a sealing surface and a second surface, and defines a first flow path from the sealing surface to the second surface. The diaphragm extends between the housing and the seat. The retainer secures the diaphragm to the seat, and may include a base portion proximate the seat, an intermediate portion extending along the longitudinal axis from the base portion toward the outlet, an end portion extending from the intermediate portion, and at least one aperture that permits fluid communication between the first flow path and the second chamber.

Abstract: A valve assembly includes a valve body configured to define a chamber forming a primary flowpath between an inlet port and a discharge port, an isolator disposed inside said chamber, and a poppet having a bore. The isolator is defined by a skirt and a stem, with the stem coupled to the valve body, and the skirt affixed to the stem. The poppet is disposed inside the chamber, and the bore is slidably received over the skirt. The isolator is configured to guide the poppet relative to the valve body, and the skirt is configured to shield the bore and isolate the poppet from substantially all of a dynamic pressure component of pressurized fluid when pressurized fluid flows from the inlet port past a portion of the poppet and then through the discharge port of the valve assembly.

Abstract: A motion control device for controlling the movement of an operational member about a first axis and about a second axis includes a spindle having a socket and a control arm wherein the socket defines a first axis opening. The device includes a cylindrical pivot member inserted into the first axis opening concentric with the first axis. The pivot member defines a second axis opening and the device includes a cylindrical pivot pin inserted into the second axis opening concentric with the second axis. The spindle is designed to pivot in a first direction about the first axis and in a second direction about the second axis wherein the first and second axes are orthogonal to each other. In one embodiment, a hexagonal drag spring is inserted between the pivot member and spindle to influence the frictional drag for one of the two directions of movement.

Abstract: The riser line shutoff valve where oxygen flows into the valve from the inlet and through an orifice in the piston. This orifice creates differential pressure between the upstream and downstream side of the piston. When the differential pressure across the piston exceeds the spring load and friction between the piston and the valve body, the piston moves to the left and seats on the brass probe in the conical area of the piston, preventing the flow of oxygen. The valve will not open until the upstream pressure is removed. The base of the brass probe has holes, allowing oxygen to flow out of the outlet port when the valve is open. The probe is threaded into the probe base allowing for valve adjustment for proper operation. The spring simultaneously serves the functions of retaining the probe base and providing a piston load to keep the piston open until the critical flow rate is reached.

Abstract: In order to achieve an object to provide a liquid control valve of normally close valve type which has both of an outflow side pressure automatic regulating function and a water stop function, the liquid control valve has a pressure regulating piston which moves within a housing for finding a balance point between an outflow side pressure and a spring force of a pressure regulating spring placed so as to resist the outflow side pressure; a movable valve seat which is provided in the pressure regulating piston and moves together with the pressure regulating piston; and a valve body which sits on the valve seat so as to close the valve in accordance with a valve closing force generated by an inflow side pressure and a spring force of a water stop spring, and moves apart from the valve seat so as to open the valve at the time when an external valve opening force larger than the valve closing force is applied, whereby the outflow side pressure automatic regulating function is achieved in accordance with movement

Abstract: A flow-through pressure regulator includes a retainer that secures a diaphragm relative to a seat, and includes an intermediate portion, an end portion and a base portion. The intermediate portion extends along a longitudinal axis and is fixed with respect to the seat. The end portion extends from the intermediate portion and includes a concave surface facing the seat. The regulator includes multiple flow diffusers such that the end portion includes at least one aperture having a flow axis that is oblique to the longitudinal axis so as to reduce noise due to fluid flow and/or the seat forms a passage having an increasing cross-sectional area from an inlet to an outlet.

Abstract: In one embodiment, a flow control valve includes a valve body having an inlet, an outlet, a flow passageway coupling the inlet to the outlet, and a cavity with first and second chambers. The valve further includes a hollow piston disposed in the first chamber and a seal separating the first and second chambers. The seal has a section within the piston that is exposed to the fluid in the first chamber. The section of the seal defines a first effective area. The valve also includes a biasing member configured to urge the piston, and a reference pressure passageway in fluid communication with the inlet and the second chamber. The valve can further include a piston seat that has a second inner effective area at least approximately equal to the first inner effective area.

Abstract: A pressure regulator assembly includes an inlet portion having a passageway through which liquid passes through the assembly. The assembly includes a plunger movable within the housing to selectively engage the inlet portion or the housing to control the path of liquid through the assembly.

Abstract: A dual seat valve which selectively supplies and releases fluid to and from a reservoir, such as a dome of a main valve in a pressure relief system. The valve comprises a housing with an interior chamber and an annular first seat surface. A valve assembly is configured for sliding movement within the housing, the valve assembly comprising a hollow stem with a distal end having an annular second seat surface. A sealing member such as a spherical ball is disposed within the interior chamber. In a first valve position, the second seat surface extends through and above the first seat surface, supporting the sealing member and permitting fluidic flow through the first seat surface. In a second valve position, the second seat surface retracts and the sealing member is supported on the first seat surface, permitting fluidic flow through the second seat surface.

Abstract: A constant gas flow regulating device includes an inlet chamber, an outlet chamber and a movable wall that delimits the inlet and outlet chambers from each other. The moveable wall carrics a body comprising an opening that permits communication between the inlet and outlet chambers. An elongate element extends centrally in the opening of the body in the moving direction of the wall. The opening within the body surrounds a portion of the elongate element. In a first position the opening in the movable wall is placed in the vicinity of a first end of the elongate element. The element has a sectional size that gradually increases from the first end to a second end thereof. The size of the opening in the movable wall is larger than the sectional size of the elongate element. A helical spring biases the movable wall towards a first position.

Abstract: The present invention provides a flow-through pressure regulator which is self-contained. The flow-through pressure regulator includes a housing having an inlet and an outlet offset along an axis. The housing is separated by a valve assembly into a first chamber and a second chamber. The valve assembly is disposed between the inlet and the outlet along the axis. The valve assembly has a closure member that permits or inhibits flow.

Abstract: A valve is disclosed for dispensing a flowable material from a container. The valve has a first chamber (40) at a first pressure wherein said first chamber (40) defines an outlet (28) in communication with said first chamber (40). A second chamber (42) is at a second pressure. The valve has a stop (18) indexed against a third pressure, operating to selectively place the first chamber (40) into communication with the second chamber (42). The stop (18) is operative to connect the second chamber (42) to said first chamber (40) when the first pressure is less than the third pressure. The valve has structure capable of balancing internal forces acting on the valve such as from pressure from the flowable material in the container.

Abstract: A flow-through pressure regulator includes a divider, a closure member and a housing. The divider separates a first chamber from a second chamber, and includes a passage that provides fluid communication between the first and second chambers. The closure member moves relative to the divider between first and second configurations. The first configuration substantially prevents fluid communication through the passage, and the second configuration permits fluid communication through the passage. The housing includes a first homogeneous housing portion and a second housing portion. The first homogeneous housing portion includes an inlet, defines the first chamber, and forms a pocket that receives a majority of the closure member. The second housing portion includes an outlet and defines the second chamber.

Abstract: A flow-through pressure regulator including a divider that separates first and second chambers, a closure member, a housing, and a shell. The divider includes a passage that extends along an axis and provides fluid communication between the first and second chambers. The closure member moves relative to the divider between first and second configurations. The first configuration substantially prevents fluid communication through the passage, and the second configuration permits fluid communication through the passage. The housing includes first and second housing parts. The first housing part includes a fluid flow inlet and defines the first chamber, and the second housing part includes a fluid flow outlet and defines the second chamber. The shell defines a pocket that receives the closure member. And the shell is displaced along the longitudinal axis relative to the first housing part so as to be press fitted with respect to the first housing portion.

Abstract: A valve assembly includes a housing defining a main chamber having an inlet connectable to a source of pressurized fluid, and an outlet; a first valve within the main chamber normally closing the main chamber outlet but automatically opening its outlet in response to a first predetermined pressure within the main chamber; an intermediate chamber communicating with the main chamber outlet; and a second valve having an inlet communicating with the intermediate chamber, and an outlet for discharging fluid from the chambers. The second valve is normally closed but automatically opens in response to a second predetermined pressure slightly higher than the first predetermined pressure, such that the second valve reduces or eliminates drippings in the discharge of fluid from the chambers particularly during low rates of flow of the fluid into the main chamber via the main chamber inlet.

Abstract: A pressure regulator includes a housing, a divider including a first valve member, and a second valve member. The housing includes an inlet and an outlet, and defines an interior volume. The divider separates the interior volume into first and second chambers, and included the first valve member, a diaphragm, and a retainer. The diaphragm extends between the housing and the first valve member. Fluid communication between the first and second chambers through the diaphragm being prevented. The retainer secures the diaphragm relative to the first valve member, and the retainer is press-fitted with respect to the first valve member. The second valve member is arranged between first and second configurations relative to the first valve member. The first configuration substantially prevents fluid communication between the inlet and the outlet, and the second configuration permits fluid communication between the inlet and the outlet.

Abstract: The present invention provides a fuel system for an internal combustion engine powered by fuel that includes a fuel tank having a wall defining a volume. The fuel system also includes a pump that is disposed proximate the fuel tank and operatively connected to the volume. The fuel system further includes piping that is coupled to the pump and is operatively connected to the internal combustion engine. A pressure regulator with a self-contained valve assembly is disposed in at least one of the pump or the piping.

Abstract: A flow control valve includes a body member (1) having a bore (10) defining a fluid flow passageway. A resiliently-biased flow control member (2) is mounted in said passageway for movement relative to the body member (1) in response to the differential fluid pressure across the valve. The flow control member (2) includes a flow control port (28) that defines with a probe element (44) an annular throttling orifice (46). The probe element (44) is tapered such that the size of the annular orifice (46) depends on the position of the flow control member relative to the probe element. (FIG.

Abstract: A casing accommodates therein a movable valve adapted to be moved away from a valve seat by a hydraulic oil flowing through an oil-hydraulic circuit from a hydraulic cylinder to an oil-hydraulic pump. In an event of oscillatory hydraulic pressures in the hydraulic cylinder, the hydraulic oil is returned through the oil-hydraulic circuit from the hydraulic cylinder to the oil-hydraulic pump via a second port, a communication path, a minor gap between the movable valve and the valve seat, and a first port. In this process, the communication path allows for a smooth flow of the hydraulic oil from the second port into the movable valve.

Abstract: A fuel supply apparatus capable of reducing the abrasion of a driving cam and a tappet without increasing the dimensions and weight of the apparatus. This fuel supply apparatus is provided with a tappet which has a pressure receiving surface contacting the driving cam of an engine. The tappet is provided at the part of a outer surface thereof which is in the vicinity of an outer circumference of the pressure receiving surface with a groove adapted to prevent the local concentration of stress on the tappet and having a V-shaped, semicircular or U-shaped cross section.

Abstract: An internal fuel filter for a pressure regulator having a body that encloses a fuel flow path. A first support includes a first surface adapted to be sealingly surrounded by the body. A second support is spaced from the first support along an axis. At least one rib is disposed between and contiguous with the first and second supports, wherein one of the rib and the second support includes a second surface adapted to sealingly surrounded the body. A filter element extends between the first support and the second support and surrounds the axis.

Abstract: A fuel pressure regulator is provided between the outlet of the fuel pump and an inlet of a jet pump to control the flow of fuel to the jet pump. Desirably, during low voltage conditions in a vehicle, the flow of fuel to the jet pump may be temporarily restricted or terminated to decrease the amount of fuel diverted from the engine and thereby increase the flow rate of fuel to the engine and improve the performance of the engine. The regulator may also function to bypass fuel delivered from the fuel pump in excess of the engine fuel demand to control the pressure of and limit the maximum pressure of fuel supplied to the engine.

Abstract: A flow-through pressure regulator includes a housing having an inlet and an outlet offset along a longitudinal axis. The housing is separated by a divider into a first chamber and a second chamber. The divider has a passage that communicates the first chamber with the second chamber. The passage includes a first section extending along the longitudinal axis and a second section extending transverse to the longitudinal axis. A closure member permits or inhibits flow through the passage.

Abstract: A flow-through pressure regulator includes a housing having an inlet and an outlet offset along a longitudinal axis. The housing is separated by a divider into a first chamber and a second chamber. The divider has a passage that communicates the first chamber with the second chamber. The passage includes a first section extending along the longitudinal axis and a second section extending transverse to the longitudinal axis. A closure member permits or inhibits flow through the passage.

Abstract: A liquid filter (1) with a built-in pressure regulator (11) for fuel is proposed, in which the pressure regulator (11) with its diaphragm (32) is mounted on the inside of a cap (14) that has the inflow connector (16) and the tank connector (17). The diaphragm (32), which experiences a flow on its inside, is acted upon by the pressure of the fuel on the clean side (25) of the filter element (21), and the flow through the filter element is radially from the outside inward. Integrating the pressure regulator (11) in the cap enables a simple, compact, economical design of the liquid filter (10), through whose valve (36) in the pressure regulator (11) only cleaned fuel flows.

Abstract: In a pressure maintenance valve for pneumatic apparatus including a valve housing having inlet and outlet passages, a valve member is disposed in the housing and includes a membrane having at one side thereof an annular valve structure disposed opposite an annular valve seat which divides the space adjacent the membrane into inner and outer concentric chambers when the valve structure is seated on the valve seat. A valve spring is disposed at the other side of the membrane for biasing the membrane into engagement with the valve seat. One of the concentric chambers is in communication with the inlet passage and the other with the outlet passage, whereby the membrane is held in an open valve position as long as the pressure in the inlet and outlet passages is greater than a certain value but the membrane closes the valve to maintain the predetermined pressure in the outlet passage when the pressure falls below that certain value.

Abstract: A fluid control device is disclosed which is capable of permitting flow through the fluid control device in response to a control signal and in response to a predetermined high pressure. The fluid control device includes a valve body having a first end, a second end, and a bore extending between the first end and the second end. A plurality of inlet ports extend from the valve body into the bore. A moveable sleeve is located within the bore and includes a check valve seat. A valve rod extends from the first end of the valve body into the sleeve and sealingly engages the check valve seat. The sleeve and associated check valve seat is moveable out of sealing engagement with the valve rod in response to a predetermined pressure within the inlet ports. In addition, the valve rod can be moved out of sealing engagement with the check valve seat in response to actuation of a solenoid armature that is in contact with the valve rod.

Abstract: A delivery valve includes a body defining a chamber into which from one end thereof extends a tubular support member. The interior of the member is connected to the outlet of a fuel pump and an outlet extends from the chamber to a fuel nozzle. Slidable about the support member is a first valve element which defines a seating in its end presented to the other end of the chamber. A second valve element is provided for engagement with the seating and a spring urges the first valve element into engagement with the second valve element. The first valve element also defines a surface against which the fuel pressure in the interior of the tubular member can act to lift the first valve element away from the second valve element to allow fuel flow from the outlet.

Abstract: A venting valve for a fuel tank of a working tool driven by an internal combustion engine has a pressure compensation channel connecting the fuel tank interior to the surrounding atmosphere. A valve seat and a diaphragm are provided for closing off the pressure compensation channel when the diaphragm is seated on the valve seat. The diaphragm is lifted off the valve seat to open the pressure compensation channel when vacuum is present in the fuel tank interior. The valve seat is located at a first side of the diaphragm facing away from the fuel tank interior. The diaphragm has a central opening arranged centrally relative to the valve seat. A support plate is positioned at a second side of the diaphragm facing the fuel tank interior. It covers the deflecting area of the diaphragm and supports the diaphragm. The support plate has a sealing bead positioned in alignment with the valve seat. The spring forces the support plate and the diaphragm against the valve seat.

Abstract: A modular pressure regulator/filter wherein the fuel filter is adapted to be attached to a fuel delivery system of an internal combustion engine and the housing thereof has a projecting wall on the filter housing adjacent to a female opening in the fuel filter housing. This projecting wall has at least one slot therein. A clip is provided and includes a disc portion with a central opening therein for selectively receiving a male outlet conduit from the pressure regulator. A clip projection, which is integral with and movably attached to the disc portion, is adapted to be selectively received into the slot in the projecting wall whereby the clip is held from moving away from the projecting wall. An annular projection on the pressure regulator housing is disposed between the disc portion and the clip projection when the clip projection is in the first position thereof for holding the pressure regulator housing in the clip.

Abstract: The present invention relates to valve constructions which allows two different flow rates to pass through said valve, whether by two separate control signals or by one control signal and the second flow rate being attained automatically or inherently after the first flow rate has passed through the valve. The invention also includes a filter material cleaning system and a method of operating a filter material cleaning system which utilizes this valve but which helps to prevent the factors which would cause the re-deposition of the filtered particulate material whether onto the row of filter bags being cleaned, and or an adjacent row to the row being cleaned or two adjacent rows to the row being cleaned.

Abstract: A pressure-reducing valve has a relief valve seat shaped as a bottomed cylindrical sleeve, a seat disposed on an inner wall surface of the relief valve seat, and a relief valve mechanism having a ball for opening and closing a relief passage defined in the relief valve seat when unseated off and seated on the seat.

Abstract: A set point of a pressure output of a pressure regulator (12) is adjustable without having to overcome a biasing force to selectively adjust the set point of the pressure output. The regulator includes a housing (14) having a chamber (18) and a pressure output port (24) in fluid communication with the chamber (18). A piston (38) having an interior cavity (42) is slidably disposed within the chamber (18) of the housing (14). A biasing member (88) extends between the piston (38) and the housing (14), such that a biasing force is applied to the piston (38) which increases as the piston (38) is moved in a direction away from the pressure output port (24) of the housing (14). The piston (38) has a first flow port (54) which extends through a wall of the piston (38). An operating member (56) has a second flow port (60) which is positionable within the interior cavity (42) of the piston (38) at selected distances from the ends (20, 22) of the housing (14).

Abstract: A snap-action valve includes a housing defining a fluid chamber and a deformable membrane mounted within the chamber in alignment with an outlet opening in a wall of the housing. The membrane has an inner face exposed to the pressure within the chamber, and an outer face exposed to the ambient pressure via the outlet opening. The wall of the housing formed with the outlet opening is displaceable from the wall of the: housing formed with the inlet opening such that an increase in pressure in the chamber causes the membrane to deform to maintain the outlet opening closed until the displacement of the two walls exceeds the deformability of the membrane, whereupon the membrane opens the outlet opening with a snap-action to discharge a quantity of the fluid from the chamber and then recloses with a snap-action upon release of the pressure resulting from such discharge.

Abstract: A valve for relieving an excess negative pressure condition inside a medical device comprising a diaphragm with an inner periphery and an outer periphery and an actuator having a piston extending axially therefrom which is inserted through the inner periphery of the diaphragm. The piston comprises a plurality of legs that form a void therebetween at the free end thereof. The outer periphery of the diaphragm is sandwiched between the upper and lower housings so as to create a hermetic seal that separates the valve into a venting side and a suction side. To relieve an excess negative pressure condition the diaphragm is operable in one of two positions. In the first position, a biasing members forces the inner periphery of the diaphragm in sealing engagement around the circumference of the piston so that a hermetic seal is maintained between the suction side and the venting side.

Abstract: Fully imidized polyimidisiloxanes which are based on oxydiphthalic anhydride are soluble in diglyme which gives them particular utility in the micro-electronics industry. The polymers are prepared from oxydiphthalic anhydride, a difunctional siloxane monomer and an organic diamine that provides an assymetrical structure in the polyimidesiloxane polymer chain. The polyimide-siloxane can be prepared with functional groups which render them directly curable. The polyimidesiloxanes can also be prepared with functional groups which when reacted with an unsaturated compound renders the polymers curable. The products of the invention can be used in the form of solutions in the micro-electronic industry. The polymers can also be used in wire and cable coating and to prepare films, fibers, and molded and extruded articles.