Abstract: A shroud for a mask system includes a retaining portion structured to retain a frame, a pair of upper headgear connectors each including an elongated arm and a slot at the free end of the arm adapted to receive a headgear strap, and a pair of lower headgear connectors each adapted to attach to a headgear strap. The retaining portion, the upper headgear connectors, and the lower headgear connectors are integrally formed as a one piece structure.

Abstract: A valve for an air brake system on a commercial vehicle comprises a body, an inlet port connected to the body and at least one delivery port connected to the body. The inlet port has a threaded portion distal to the body and a hex portion proximate to the body. The hex portion includes a frangible feature in substantially the mid-point of the hex portion such that the valve can easily be removed from an air brake reservoir when the valve is broken at the frangible feature.

Abstract: A jetted check valve includes a body with an upper opening and a lower opening. The jetted check valve also includes a primary poppet slidably disposed in the body to allow the flow of fluid from the lower opening and out of the upper opening and prevent the flow of fluid from the upper opening through the lower opening. The jetted check valve further includes a secondary poppet slidably disposed at least partially within the primary poppet to allow the flow of fluid from the lower opening and out of the upper opening and prevent the flow of fluid from the upper opening through the lower opening. A method of removing debris from above a jetted check valve and permitting production fluids to flow up hole through the jetted check valve. The method includes creating a secondary flow path in the jetted check valve to remove debris that settled up hole of the jetted check valve when production of an oil and gas well has been halted.

Abstract: A vehicle system for a vehicle includes a controller. The controller is configured to transmit a first control signal to a transmission of the vehicle to engage a first gear of the transmission, acquire information regarding a pressure of an inlet flow of water received by a pumping system of the vehicle, and transmit a second control signal to the transmission to engage a second gear of the transmission based on the information.

Abstract: Piston valve (10) with a hollow housing (13), an inlet (11) and an outlet (12) communicating with the inlet only through the piston valve (10), and a pushbutton (27) that can be moved in and out direction of the housing. A control valve (30) is also arranged in the inner cavity of the housing (13) spaced axially from the valve seat (14), and the opening and closing of the control valve (30) is controlled by the position of the pushbutton.

Abstract: A valve can include a body having an inlet and an outlet coaxial about an axis, a stationary valve seat between the inlet and the outlet, one or more valve members slideably coupled to the valve body and adapted to optionally couple with the valve seat, one or more biasing devices adapted to bias the valve member(s) in one or more longitudinal directions, and one or more actuators adapted to optionally move the valve member(s) into and/or out of sealing engagement with the valve seat. An actuator assembly can include one or more of an electrohydraulic actuator and an electromechanical actuator, among others.

Abstract: A valve body has a piston that slides within the body through four successive positions. The piston has a head, and an upper and lower skirt, with a port in the upper skirt. In the first position, a bias force urges the piston to the first of four positions, in which the piston port is closed. In a second position, the piston port aligns with a low pressure port in the valve body, when a low pressure supply of water is connected. In a third position, greater pressure again closes the piston port. In a fourth position, at a still greater pressure, the piston port aligns with a high pressure port in the valve body. The bias force or a location of the piston port can be varied for valves along a supply line, whereby varying supply pressure opens different valves, thereby enabling addressing of valves according to supply pressure.

Abstract: An anti-oscillation valve for and in a trap primer to restrict the flow of water from the supply line to an upper chamber of the trap primer and to facilitate the flow of water from the upper chamber to the supply line. The anti-oscillation valve having a body with a water supply bore provided therethrough. The bore includes portions defining an inlet and an outlet. First and second bore shoulders are formed in the bore. A filter screen is retained in engagement with the first bore shoulder. An anti-oscillation valve disc freely rests on the second bore shoulder and is retained between the first bore shoulder and the second bore shoulder. The anti-oscillation valve disc includes a valve disc orifice defined through and communicating the inlet with the outlet.

Abstract: A pourer comprises a conduit having an inlet and an outlet; sealing means comprising a plurality of sealing members extending radially from the conduit and dimensioned to engage an interior surface of a bottle neck; an air vent having an inlet and an outlet; the inlet and outlet of each of the conduit and air vent being located on opposite sides of the sealing means; wherein the pourer has no component with a diameter greater than a diameter to engage completely within the bottle neck. In this way, the pourer is configured to be inserted into a bottle neck without any part of the pourer extending outwardly from the bottle neck; and wherein the conduit includes a chamber having a valve comprising an annular valve seat and a moveable member located in the chamber arranged to engage the valve seat to close the valve when the pourer is inverted.

Abstract: A unique cap for an automatic test tube recapper is presented. The cap has a conical body with an upper top flange and lower sections for inserting into standard test tubes. The middle section directly under the upper top flange is about 13 mm in diameter. A bottom section under the middle section has a diameter of about 16 mm. The cap has a rounded bottom. The middle and lower sections have diameters similar to the diameters of most common test tubes. One or more nipples with notches cutout are located inside the conical body. The notches grip the lower part of a hammer drive during the driving process but release the hammer drive once the cap has been seated inside the test tube.

Abstract: A kit for use in combination with a squeeze bottle includes a bottle cap or plug configured to seat and seal multiple sizes of a bottle opening or spout by threaded attachment to or compression fit in the spout. The cap or plug includes an axial throughbore which receives multiple sizes and configurations of fluid tubes and discharge nozzles which when properly attached to an inserted into a squeeze bottle enables controlled pumping and discharge of fluid such as hydraulic fluid or liquids.

Abstract: In a compressed air supply system for a first compressed air consumer circuit such as an air spring system of a vehicle, a first compressed air line leads to the first compressed air consumer circuit and a distribution line leads to further consumer circuits. A priority valve arrangement is disposed between the first compressed air line, wherein the first compressed air line comprises no safety valve. The first compressed air consumer circuit can therefore be filled at a higher priority, and achieve operational readiness quickly in air spring processes such as lifting or raising activities.

Abstract: A pump system includes a pump housing defining a plurality of pump bores, a plurality of pumping members, and a plurality of valves positioned within the pump housing. Each of the valves includes a valve body defining a plurality of inlets, arranged to receive a low pressure fluid, a suction valve coupled to the valve body and movable between a closed position and an open position, the suction valve including a suction valve closing member having a conical contact surface having a large diameter portion, and a first elastomeric member positioned adjacent the large diameter portion, and a discharge valve coupled to the valve body and movable between a closed position and an open position, the discharge valve including a discharge valve closing member having a conical contact surface having a large diameter portion, and a second elastomeric member positioned immediately adjacent the large diameter portion.

Abstract: An applicator head for discharging media from a reservoir, including a housing with a coupling device for coupling to the reservoir, an inlet opening, an applicator opening for discharging medium into a surrounding atmosphere, a conveying device for conveying the medium from the inlet opening to the applicator opening and an actuating handle, movable relative to the housing to actuate the conveying device. The housing is a one-piece injection molded part formed from two plastics having different properties. The coupling device is constructed of a first of the two plastics. A ring seal surrounds the inlet opening and is arranged to bear tightly against the reservoir when coupled to the applicator head. A venting valve with an aperture which opens in a pressure-dependent manner and through which ambient air flows from the surrounding atmosphere into the reservoir, is constructed of the second of the two plastics.

Abstract: A therapeutic face mask comprises a face-engaging portion and a single connector having a mask-engaging end and a single treatment-receiving end which has a single attachment mounting for detachably sealingly receiving a treatment attachment, such as an oxygen reservoir bag or a nebulizer. A one-way inhalation valve in the connector permits fluid flow from the treatment-receiving end to the mask-engaging end during inhalation and inhibits fluid flow in the other direction. The mask also includes a valve-governed exhalation port and an anti-asphyxia valve assembly configured to permit fluid flow from ambient to the face-engaging portion during inhalation only when inspiratory effort during inhalation exceeds fluid flow to the treatment-receiving end of the connector. Also provided is an oxygen reservoir bag having a neck shaped for removable coupling to a mating connector of a therapeutic face mask. An oxygen reservoir bag may have a metered-dose inhaler port defined in its neck.

Abstract: The present invention applies to a vacuum transfer system, and relates to an air control valve for controlling the supply of compressed air in a vacuum transfer system. More specially, the air control valve of the present invention is configured to execute a two-stage control. The two-stage control is realized by a piston operation method, in which, although the control is performed by compressed air supplied thereto, a first control unit is operated by an electronic control method, and a second control unit is operated by a pneumatic control method. In particular, the second control unit is operated by vacuum pressure supplied from the vacuum transfer system. The air control valve of this invention can realize improved operational stability, improved energy efficiency and improved operational precision.

Abstract: A ball check valve controls the flow of fluid with a sphere. A body has a fluid path and a recess for receiving the sphere in alignment with the fluid path. The sphere has a retainer which secures a ball check within it. When the valve is in a “Run” position and the rate of fluid flow increases, the ball check seats in a narrow opening of the sphere, thus blocking the flow of fluid.

Abstract: A valve (4, 4?) for a fuel system for a combustion engine: A ball retainer (26) is provided with a cavity (28) to accommodate a ball (22). The ball (22) has a first seal surface (30) to cooperate with and abut sealingly against a seat (32). The ball retainer (26) has a secondary seal surface (34) to cooperate with and abut sealingly against the seat (32) when the ball (22) is not in the ball retainer (26). Also, a method for controlling a fuel system for a combustion engine.

Abstract: There is provided a safety valve to release excess pressure from a portable gas container for the prevention of an explosion, wherein, when the internal pressure of a portable butane gas container increases over certain level, the safety valve instantaneously operates to release the excess pressure gas from the container at once through an excess pressure gas outlet, thereby sufficiently lowering the pressure inside the container to prevent the container from exploding The safety valve comprises: a safety valve housing with first and second diameter portions integrally formed in a cylindrical shape, the first and second diameter portions being different from each other in diameter; a shaft with a body, a top projection formed on a top of the body, a gas outflow portion and a gasket locking portion formed at a lower part of the body, the shaft positioned inside the safety valve housing; a stopper with a lower part being open, an upper part being closed except for a center where a through-hole is vertically for

Abstract: A pressure relief valve is disclosed with a first stage valve that is in series with a second stage valve, with an enclosed cavity between the first stage valve and the second stage valve. The first stage valve relieves pressure from an enclosure into the enclosed cavity between the stages, when the pressure is above a cracking pressure of the first stage valve. The second stage relieves pressure from the enclosed cavity when the pressure is above the cracking pressure of the second stage valve.

Abstract: A self piloted check valve which utilizes closure of a piloting flapper valve to permit development of closure forces for a ball valve. The normally open ball valve has a central flow passage and simultaneously rotates and translates as it traverses between its fully open and fully closed positions. An opening bias system utilizes a combination of a first less stiff spring and a second stiffer spring. Reversible decoupling means disconnects and reconnects the second spring at a short travel distance from the normally open position of the ball, while the first spring always provides opening bias forces to the ball. The pressure induced force required to fully close the ball valve following decoupling of the second spring is more than the force required to overcome the combination of the first and second springs. Additionally, while the secondary spring is engaged, hydrodynamic damping of the ball opening movement is provided.

Abstract: A pressure release valve including a holder element provided on the outside of the lid of a pressure cooker, a body packing disposed inside the holder element, a pressure release tube provided in the lower inside portion of the body packing, a valve plunger disposed in the body packing and comprising a shank portion and a beveled portion which is at the lower end of the shank portion and set on the upper end of the pressure release tube so as to allow the interior of the pressure release tube to be an empty space, a coil spring mounted on the valve plunger, a lock nut connected to the holder element, and a filtering cap provided fixedly or non-fixedly within the lock nut.

Abstract: It is addressed to provide a hydraulic control valve for preventing high-speed rotation of a valve body of a check valve incorporated in the hydraulic control valve of a type that pressure oil is supplied from a tandem, path and a parallel path via the check valve. A check valve unit is constituted by a main unit and a valve body of a first check valve. A throttle is provided on a right side of an O-ring groove. On a main unit side, there is formed a cylindrical housing portion in which a threaded portion is formed on an outer peripheral portion for fixation to a casing of the hydraulic control valve. On an inner peripheral surface of the housing portion, a groove is formed in an axial direction. Meanwhile, the valve body of the first check valve has a rib. At a time of assembly, the rib, is inserted into the groove of the main unit as indicated by an arrow.

Abstract: A water saving device and method of using same. The water saving device includes a sleeve and an elastomer fixed in the sleeve. The elastomer has at least a permanently-open hole, a throttling hole and a protrusion for arranging the permanently-open hole and the throttling hole. The permanently-open hole is a hole which still maintains open status after being distorted by pressure. The throttling hole is a hole which will be closed approximately after distortion by pressure. The water saving device not only has the function of decreasing the flow, but also can adjust the flow of the shower and faucet to make the flow steady.

Abstract: In a nonreturn valve having a tubular body, which can be installed in a vertical section of an exhaust line, a valve seat, formed within the tubular body, for at least one float, and at least one circumferential groove, which is open in the downstream direction, the intention is to make available a solution by means of which it is possible to provide a nonreturn valve that is simple, advantageous in terms of production engineering and has a particularly high performance, and to do so in a way which is simple in terms of design and is economical. This is achieved by virtue of the fact that the circumferential rim of the at least one float projects radially over the radially inner circumferential wall section and has an axial lip facing upstream, which extends into the circumferential groove in the axial direction when the at least one float is resting on the valve seat.

Abstract: A fuel tank valve device equipped with a casing, and a valve mechanism. The valve mechanism has a first valve unit having a first valve connecting hole, and a second valve unit that opens and closes the first valve connecting hole. The first valve unit completely closes the valve flow path by moving by the force in the valve closing direction when the pressure of the second communication path exceeds a preset first pressure value. In a state when the first valve unit is closing the valve flow path, when the pressure of the second communication path exceeds a preset second pressure value that is greater than the first pressure value, the second valve unit receives the pressure from the first valve connecting hole and moves to open the first valve connecting hole, communicating with the valve flow path.

Abstract: A pressure retention valve with integrated valve is disclosed. The pressure retention valve with integrated valve includes a housing; an outer piston positioned in the housing; a main seal between the outer piston and the housing; an inner piston positioned in the outer piston, the inner piston having a bore containing a valve; a spring between the housing and a top of the outer piston; an ambient bore in the housing above the main seal; an outlet in the housing below the main seal; and a vessel connection in the housing adjacent to the bore of the inner piston. Methods of supplying fuel to a gas consuming system using the pressure retention valve are also described.

Abstract: A safety relief fill valve adapted to being an interface for filling and relieving excess pressure from a closed fluid system. An insert shell retains a piston member for movement between fluid input and fluid holding configurations, the piston member being resiliently biased toward fluid holding configuration. When in fluid holding configuration, the piston member sealingly engages an inlet bore of the insert shell. When in fluid input configuration, the piston member allows fluid flow through the inlet bore. A housing receives the insert shell, thereby limiting relative axial movement and forming a cavity between a portion of the housing the insert shell. This cavity provides mechanical guidance and a flow channel for an overpressure relief system having fluid retaining and fluid relief configurations, the overpressure relief system being elastically biased toward fluid retaining configuration. The elastic bias is overcome responsive to excess pressure within the closed fluid system.

Abstract: A housing has a compression chamber and a first passage, through which the compression chamber communicates with an accumulation chamber. A discharge valve is provided in the first passage and configured to open to supply fuel from the compression chamber to the accumulation chamber in response to increase in pressure in the compression chamber. A second passage is configured to communicate the accumulation chamber with the compression chamber via the discharge valve. A valve element allows fuel flow from the accumulation chamber to the compression chamber. A biasing unit biases the valve element to seat the valve element on a valve seat of the second passage. The sidewall of the valve element and the inner wall defining the second passage therebetween define a throttle midway through the second passage for restricting fuel flow from the accumulation chamber to the compression chamber.

Abstract: An apparatus includes a valve housing having an inlet port, a first chamber with a first outlet port, and a second chamber with a second outlet port. A first valve opens between the inlet port and the first chamber under a first level of pneumatic pressure at the inlet port. A second valve opens between the first chamber and the second chamber under a second, greater level of pneumatic pressure in the first chamber. A third valve opens between the second chamber and the first chamber under a third level of pneumatic pressure in the second chamber, with the third level being less than the first level.

Abstract: In a non-return valve having a first closing body and a related first valve seat, and a second closing body and a related second valve seat, according to the invention the first and second valve seats are designed on a single valve seat component and the second valve seat is designed so as to surround the outside of the first valve seat.

Abstract: A floating valve providing a parent-and-subsidiary flow-guided floating valve of low pressure drop, high throughput and highly flexible operation maintaining high efficiency within a wide range of gaseous load changes is disclosed. Furthermore, a parent-and-subsidiary flow-guided floating valve having at least two legs, wherein the body of the parent valve is a symmetrical plane figure with the central axis line as the symmetrical line, the central axis line to the overflow cofferdam along the direction in which the liquid flows is also provided.

Abstract: A diaphragm valve is provided, in which there is improved sealing of a closing cover (15) against the valve housing (3). The seal includes a cylindrical sealing washer (25), which is connected to the valve housing (3) in one piece and into which a cylindrical wall section (18) of the closing cover (15) can be inserted with press fit.

Abstract: A system disconnector for physically disconnecting an upstream liquid system from a downstream liquid system by means of an outlet valve (35;135) depending on the pressure difference between the upstream and the downstream liquid system comprises an upstream backflow preventer (48; 148), a downstream backflow preventer (88), and an outlet valve body in the form of a piston (26; 126) arranged between the backflow preventers (48, 88). The pressure difference at the outlet valve body (26; 126) between the inlet pressure and the medium pressure between the backflow preventers counteracts a biasing spring (82; 182) acting in the opening direction of the outlet valve body. An actuating member (64; 164), which is exposed to the inlet pressure on one side and to the medium pressure on the other side is adapted to move between two stops (54, 46; 171, 146) against the power of a spring (86; 182) to compensate for small changes in inlet pressure and prevent dripping of the valve.

Abstract: The invention relates to a relief valve comprising: a first valve body (3) for opening and closing a fluid passage (33) between a first valve connection (31) and a second valve connection (32); a second valve body (4), which is arranged on the first valve body (3), for opening and closing a valve gate (3A), which is arranged in the first valve body (3), between the first valve connection (31) and a valve interior (9); at least one fluid passage (11) providing a connection between the valve interior (9) and the second valve connection (32); a closure member (18) for selectively opening and closing the fluid passage (11); an actuator (2, 7) for moving or actuating the second valve body (4) in a closing direction, wherein a movable member (2) of the actuator (2, 7) is arranged so as to be movable, after the closing of the second valve body (4), further in the same direction, so that the first valve body (3) can be moved in an opening direction of the first valve body (3) via an engagement of the second valve

Abstract: A system disconnector for disconnecting an upstream liquid system providing an inlet pressure from a downstream liquid system by a release valve (34) in response to a pressure drop between the systems, includes an upstream backflow preventer (40), a downstream backflow preventer (64) and a release valve body piston (18) arranged between the backflow preventers (40, 64). A pressure difference between the inlet pressure and a middle pressure between the backflow preventers (40,64) counteracts a spring (60) biasing the release valve body in the opening direction, the release valve body (18) having an effective pressurized surface (d) smaller than the surface effective for the inlet pressure. A hollow space (74) defined by the release valve body is connected to the middle pressure (66). A shiftable seat (76) provided in hollow space (74), is movable with respect to the release valve body to a fixed stop (84) upstream of the valve seat (32).

Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.

Abstract: A combination neutral valve and check valve assembly is provided for use in connection with a closed hydraulic circuit and a sump such as in a hydrostatic transmission. A cage and check poppet are mounted in a valve body having an opening between the hydraulic circuit and sump. The check poppet is movable between a first position where it closes the valve opening and a second position where it is disengaged from the opening. A check compression spring is mounted in the cage and biases the poppet to the engaged position. A valve shuttle is located in the check poppet and movable between a first position where it closes a check poppet opening and a second position where it is disengaged from the opening. A neutral valve spring is engaged to the valve shuttle and the check poppet to bias the valve shuttle to the disengaged position.

Abstract: A combination check valve and pressure rise rate valve is provided for regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, and a check poppet attached to the valve insert. In addition, the valve may include a cylinder positioned within the valve insert, a piston slidably positioned within the cylinder, a spring positioned between the cylinder and the valve insert, and an accumulator formed between the cylinder and the piston.

Abstract: A cut valve with a check valve includes a body case, a cap member, positive and negative pressure valves, and first and second springs. The body case defines a vent hole. The cap member is fitted to an upper portion of the body case. The positive pressure valve is made of resin, defines an opening part, and is disposed to be contactable with and separable from the vent hole from above. The first spring is disposed on the positive pressure valve and presses the positive pressure valve in a direction in which the positive pressure valve closes the vent hole. The negative pressure valve is made of resin and is disposed to be contactable with and separable from the opening part from below. The second spring presses the negative pressure valve in a direction in which the negative pressure valve closes the opening part.

Abstract: A quick-release connector structure for an air tank includes a connector body incorporated with an air tank and a seat block. The seat block is secured to the air tank and comprises a valve having a post extending forwardly. The valve is acting as a switch to turn the air tank on and off. The connector body comprises a first passage and a second passage. The first passage comprises an air release hole and a through hole. A thimble is disposed in the first passage. A quick-release wrench is provided in a recess disposed on the connector body. The quick-release wrench corresponds to the through hole and is secured by a fastener. By turning the quick-release wrench, the high-pressure air remaining in the pipe is released.

Abstract: One object of the present invention is to monitor water pipes regularly and to detect water leaks by using basic equipment and to provide a device that generates an alarm when a leak occurs. The present invention responds not only to minor leaks that occur naturally because, for instance, a water pipe is decrepit, but also responds to human-caused leaks, such as those that occur because a person forgets to turn off a water faucet or because of the failure of equipment such as a hot-water heater. The present invention is a leak-detection alarm system that is composed of two main parts: (1) a leak-detecting check valve that detects movements of a movable device that makes the same movement as the valve element of a check valve that is attached to a water pipe and performs switching, and that transmits as detection signals the movement of valve elements, and (2) a signal-processing device that analyzes detection signals transmitted by the leak-detecting check valve and actuates a leak-detection alarm.

Abstract: The invention concerns a control valve (c) for internal gas pressure of a liquid tank co-operating with an orifice (10) provided in the upper part thereof, allowing through a gas flow outside the tank when the difference between the internal pressure and the external pressure reaches a predetermined threshold, and an inverse flow when the internal pressure of the tank is lower than the external pressure. The invention is characterised in that the valve comprises a body (1) whereof the lower part is configured to close the tank orifice (10) with a mass such that beyond said pressure differential value constituting the predetermined threshold, the body (1) is spaced apart from the orifice (10), said body (1) further comprising a through recess (4) arranged in the extension of the tank orifice (10) when they are in contact, said recess (4) being provided with closing means (3) capable of being activated when the differential pressure between the tank and outside atmosphere is positive.

Abstract: A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.

Abstract: A reactive speed hump (2) includes a fluid flow control valve assembly (4). A first valve (18, 20, 21) is naturally open and a second valve (10, 14, 15, 16, 17), naturally closed. Application of fluid pressure on the control valve assembly below a first lower threshold level or above a second higher threshold level allows a flow of fluid from the inlet to the outlet, but an application of fluid pressure on the control valve between said first and second threshold levels allows substantially no fluid to flow between the inlet (7) and the outlet (9).

Abstract: In a fuel vapor processing system, a float valve and a check valve are provided in upper parts of a fuel tank to conduct fuel vapor to a canister via a fuel vapor passage. The check valve includes a low set-pressure valve and high set-pressure valve, and operates in two stages so that the internal pressure of the fuel tank can be favorably controlled by the opening of the low set-pressure valve when the fuel tank is being filled to full so that the sensor associated with the fill nozzle can successfully detect a tank full state, and any excessive rise in the internal pressure of the fuel tank typically caused by a high temperature of the surrounding environment can be avoided by the opening of the high set-pressure valve.

Abstract: A spring loaded valve member with a poppet on one end is disposed in a fuel tank with the inlet end connected to the filler tube. The valve member has a spool valve attached to the poppet. The poppet is opened by fuel discharging from a refueling nozzle and the valve member movement limited by a float operated latch such that fuel flows through the spool valve ports. Upon the float rising in the tank, the latch is released permitting the force of the flowing fuel to further move the valve member to close the spool valve.

Abstract: A valve installed at the inlet of a thermostatic mixing device for automatically stabilizing the operation of the thermostatic device by maintaining the pressure within the thermostatic mixing device close to the water supply pressure, thereby making the thermostatic device response to small pressure changes while maintaining the fluid flow through the device. The valve comprises a tubular body inserted within the water supply line, a holding seat within the tubular body, a cursor that moves within the valve body with respect to the seat, the cursor moving between a first position where the seat is partially occluded and a second position where the seat is substantially clear. The cursor is subjected to the pressure existing inside the thermostatic mixing device, and a spring positioned with the valve body that acts upon the cursor to urge the cursor towards the first cursor position.

Abstract: A replaceable cartridge type dual stage bypass valve is used in dual filter multi-media filtration assemblies. The cartridge may be selected and easily replaced to meet the various combinations and requirements of the dual filter elements (primary and secondary). The individual bypass valves that form the dual stage bypass valve may each be responsive to a predetermined increase of pressure due to a clogged filter condition. The individual bypass valves may use replaceable coil springs. The spring force of the coil spring is determined by the pressure differential to be resisted, i.e., the resistance to be offered by the spring action of the spring, and the flow capacity at a given pressure differential.

Abstract: In some prior art Blowout Preventer (BOP) operating systems, high velocity fluid flows and low differential pressures induced vibration in the system. This vibration may result in collapsed and failure of hydraulic hoses in the system. A quick dump valve has been added at or near the open port on the BOP assembly to reduce vibration and other problems. The dump valve has a vent position and an open position. Several alternative embodiments add a ball check valve assembly to the shuttle in the quick dump valve.