Abstract: Backflow prevention is provided in connection with a device having one or more shut-off valves integrated with a double-check-valve backflow prevention device and/or housing. Preferably, a single housing encompasses two backflow preventer check valves, and upstream and downstream shut-off valves. Typically, end users cannot readily remove the shut-off valves (and/or their housing) from the backflow preventer check valves (and/or their housing). No flange or other connection between shut-off valves and backflow preventer check valves (and/or their housing) is required, reducing size, weight and labor requirements. The system can substantially reduce or eliminate potential for installation of double-check-valve backflow preventer devices without shut-off valves.

Abstract: The present invention provides a flow-control apparatus with a check function for controlling the flow resistance of a photoresist solution. The apparatus is connected to a photoresist supply device, the photoresist supply device comprising a tank for storing the photoresist solution, a pipe partially submerged in the photoresist solution in the tank to transport the photoresist solution, and a pump for drawing the photoresist solution from the tank. The apparatus comprises a housing and a sphere. The housing comprises a chamber, a top opening positioned at the top of the chamber, and a bottom opening positioned at the bottom of the chamber, wherein the top opening can be mated to an end of the pipe or to a bottom opening of another apparatus. The sphere is moveably set inside the chamber of the housing and increases the flow resistance of the photoresist solution.

Abstract: A backflow preventer assembly includes a housing having a first end and a second end, a first mounting assembly configured to removably secure a first check valve at a region of first end of the housing, and a second mounting assembly configured to removably secure a second check valve at a region of the second end of the housing. The housing includes a wall having an inner surface defining a through bore extending between the first and second ends. Each mounting assembly has a wall with an inner surface defining a through bore in fluid communication with the housing through bore. A first coupling secures the first mounting assembly to the housing, and a second coupling secures the second mounting assembly to the housing.

Abstract: A drip irrigation line includes a plurality of emitter units secured within a water supply tube such that each emitter unit defines with the tube a flow-control passageway having an inlet port communicating with the interior of the water supply tube and an outlet port communicating with a water discharge opening in the water supply tube. Each emitter unit includes a one-way valve at one of the ports. Such port has an opening circumscribed by a cylindrical boss, and the one-way valve thereat includes a cap having a skirt of elastomeric material normally engaging the outer surface of the cylindrical boss to block reverse water flow into the flow-control passageway, but is deformable under water pressure to permit forward flow from the tube interior into the flow-control passageway.

Abstract: The present disclosure relates to a sealing member for sealing an opening in a fluid container. The sealing member receives a hollow tubular member to establish communication between the hollow tubular member and the fluid container. The sealing member includes a resilient sealing portion configured to receive the hollow tubular member. With the hollow tubular member inserted through the resilient sealing portion a compressive seal is formed with an outer surface of the hollow tubular member to limit passage of fluid between the resilient sealing portion and the hollow tubular member. Also included is a lead-in portion on the resilient sealing portion. The lead-in portion guides the hollow tubular member through the resilient sealing portion to establish communication between the hollow tubular member and the fluid container.

Abstract: A cylinder (32) is hermetically attached into an attaching bore (31) formed within a housing (4) and is made to advance and retreat between a take-out position (A) and a charging position (B). A check valve chamber (28) is formed within the cylinder (32). A check spring (43) resiliently pushes a check valve member (29) inserted into the check valve chamber (28) toward a check valve seat (42). The cylinder (32) has an outer surface provided with an actuation portion (50). If the actuation portion (50) is pushed, it retracts the cylinder (32) toward the charging position (B). Provided at a position opposing to the check valve member 29 through a chamber inlet (40) of the check valve chamber (28) is a receiving portion (46), which receives the check valve member (29) on a halfway while the cylinder (32) is retreating.

Abstract: A cylinder (32) is hermetically attached into an attaching bore (31) formed within a housing (4) and is made to advance and retreat between a take-out position (A) and a charging position (B). A check valve chamber (28) is formed within the cylinder (32). A check spring (43) resiliently pushes a check valve member (29) inserted into the check valve chamber (28) toward a check valve seat (42). The cylinder (32) has an outer surface provided with an actuation portion (50). If the actuation portion (50) is pushed, it retracts the cylinder (32) toward the charging position (B). Provided at a position opposing to the check valve member 29 through a chamber inlet (40) of the check valve chamber (28) is a receiving portion (46), which receives the check valve member (29) on a halfway while the cylinder (32) is retreating.

Abstract: A low emission fluid disconnect is provided along a flexible flow line for transmitting fluid from the transport to a bulkhead. The disconnect includes a ball valve including a ball rotated between the opened and the closed positions about a stem axis. The disconnect also includes union housing and a female body for threaded engagement with the ball valve. A poppet sleeve is linearly moveable within the union housing between the opened and closed positions, and has an end surface substantially conforming to an exterior surface of the ball. The poppet member is guided when moving between the opened and closed positions. A very low volume of fluid is released when the union housing is disconnected from the ball valve.

Abstract: A cylinder valve assembly having a check valve in a sealing assembly attached to a cylinder, and a detachable dispensing valve matingly fitted with the sealing assembly which actuates the check valve when seated.

Abstract: An electronically-controlled faucet has a hot-cold water mixing valve disposed in a cup-shaped housing with an open end of the housing accessible from the top side of a deck to which the housing is mounted. Water supply and discharge lines are connectable to the housing. A spacer between the closed end of the housing and the mixing valve supports check valves that prevent cross flow and reverse flow. The spacer also supports a filter screen located downstream of the mixing valve. The filter screen has a wetted area greater than the cross sectional area of the water supply lines and ports. A removable cap covers the housing. All of the mixing valve, check valve and filter components are accessible from above the deck without disconnecting any of the water lines.

Abstract: Valve cartridge (10) includes a housing (32) having inlet member (54), outlet member (52) and screw thread (34). Cavity (36) extends axially through housing (32) within which is a piston (38) which moves axially against piston seal (44) to open and close tap (10). A flow chamber (40) is provided at the end of housing (32) and includes a first seal (42) for sealing against a valve seat (18) in the tap (10). Piston (38) can be moved axially by either a rotatable spindle (46) or, a solenoid (48) and push rod (50). Piston (38) is moved axially without any rotation. Coupling member (84) couples spindle (46) to piston (38) and rotates relative to the piston (38) and the spindle. When spindle (46) is turned a predetermined number of revolutions the coupling (84) causes piston (38) to abut piston seal (44), any further rotation of spindle (46) causes rotation of the coupling member (84) without effecting the axial position of piston (38).

Abstract: A fluid dispensing device includes a valve body defining a longitudinal opening therein, an inlet in flow communication with the longitudinal opening that defines an axis generally transverse to the longitudinal opening, and an outlet defined by a first end of the longitudinal opening. A sealing member is situated within the longitudinal opening, and a valve stem is linearly movable within the longitudinal opening and adapted to seat against the sealing member to control fluid flow from the inlet to the outlet. A nozzle is coupled to the valve body adjacent the outlet and defines an opening therethrough such that fluid can flow from the outlet through the nozzle. An apparatus is situated within the nozzle so as to cause fluid flowing from the outlet through the nozzle to do work.

Abstract: There is disclosed a tap for compressed or liquefied gases having an overcharging prevention function, in which a gas can be directly infused/discharged into/from a gas storage tank, regardless of pressure/level of the liquefied gas inside/outside a gas storage tank, higher charging efficiency in the gas storage tank can be accomplished.

Abstract: A regulated air suction valve, used in conjunction with a water pump with a water inlet pipe and a water outlet pipe and a container with an air volume, installed at the water inlet pipe for replenishing the air volume and comprising: a main body, having a submerged end which reaches into the water inlet pipe and a free end; a chamber inside the main body, leading air from the free end to the submerged end; and inlet control valve, located in the chamber at the free end for letting a limited amount of air into the chamber and; a first one-way valve located in the chamber at the submerged end, allowing air to proceed from the chamber into the water inlet pipe, while blocking water from the water inlet pipe from entering the chamber.

Abstract: A mechanical leak arresting valve is disclosed in which fluid through the valve is limited to a range between a predetermined minimum flow rate and a predetermined maximum flow rate, and where both a small or large downstream leak mechanically causes the valve to lock closed. The present invention uses a locking mechanism triggered by a pressure differential resulting from the downstream leak to block the flow of fluid through the valve until the fluid source upstream is stopped. Reduction of the upstream pressure by the stopping of the fluid source automatically resets the valve without further manipulation.

Abstract: A valve assembly for an apparatus under pressure includes a valve casing including a connecting pipe for attachment to an apparatus under pressure, and a discharge pipe, with the connecting pipe and the discharge pipe being connected by a fluid-carrying pathway. Integrated in the valve casing are a shut-off valve for regulating a flow of fluid through the fluid pathway, and a control valve which includes a spring-loaded valve body having a fluid duct forming part of the fluid pathway. The valve body has one end accommodating a first sealing element movable by the valve body against a valve seat for sealing the fluid passageway and thereby separate an inlet pressure zone from an outlet pressure zone, and another end accommodating a second sealing element movable by the valve body against a seal seat.

Abstract: A portable surface cleaning apparatus has a base for movement along a surface to be cleaned and an upright handle pivotally attached to a rearward portion of the base. A fluid dispensing nozzle for applying fluid to the surface and a suction nozzle for picking up fluid and debris from the surface are associated with the base. Supply tanks are removably mounted to the handle or base while a recovery tank is removably mounted to the handle or base. An outlet in each supply tank includes a valve to close the outlet when the supply tank is removed from the base. A protrusion in a bottom surface of the supply tank defines a measuring volume for concentrated cleaning solution and is further adapted to stabilize the supply tank in the base or handle. The supply tank also includes an aperture through a lower portion selectively closed by a drain plug. A conduit connecting each supply tank to a dispensing nozzle includes a check valve restricting fluid flow to a direction from the tank and to the nozzle.