Abstract: A reusable continuously sealing metered dosing one-way valve assembly and delivery system flows a premeasured amount of a sterile flowable substance from a source which is coupled to an actuator assembly to an outlet orifice and prevents any backflow of contaminants through the continuously sealing one way valve assembly when the flowable substance ceases to flow. The valve assembly includes an elastomeric membrane which aids in preventing any backflow of contaminants when dispensing of the flowable substance is stopped. Multiple dosing of preservative-free flowable substance is provided.

Abstract: A distribution assembly includes at least two containers or receptacles, each containing a product, and being fitted with a valve having an actuator rod. A distribution device is mounted on top of the containers and includes a distribution nozzle fitted with at least one distribution orifice. The distribution device further includes a movable actuator element to provoke the simultaneous distribution of two products in a mixed or separate state. Further, an intermediate body is separate from the actuator element and includes two skirts. The intermediate body is able to engage respectively on the two actuator rods of the containers, and at least one inner channel allows the flow of products towards the distribution nozzle. The actuator element and the intermediate body are arranged to co-operate on operation of the actuator element so as to allow the passage of products from the recipients to the distribution nozzle via the inner channel.

Abstract: A pump for dispensing a liquid contained in a bottle including a shrunk-fit section including an orifice for communicating with the liquid, a pushbutton including an orifice for ejecting the liquid, a dosing sleeve integrating a needle for plugging the ejection orifice and a device for bi-directional movement of the needle, a dosing piston including a channel equipped with a closing valve for the orifice, the piston being mounted in translation, in a leak-tight manner, inside the shrunk-fit section, between an open position and a closed position of the orifice, by means of the valve, an actuating member integral with the device for moving the needle and slidably mounted inside the dosing piston, by pressing on the pushbutton, the sliding assembly being set up to actuate the moving device and to position the valve in closed position so as to enable ejection of the liquid from the dosing chamber.

Abstract: A dispenser head for mounting on an actuator rod of a fluid dispenser member. The actuator rod is displaceable up and down along an axis. The dispenser head includes a bearing surface for displacing the dispenser head and for actuating the fluid dispenser member. The head further includes a dispenser endpiece that internally defines an endpiece channel that opens out to the outside at a dispenser orifice. The endpiece presents an elongated configuration with a connection end connected to the remainder of the head and a free end. The dispenser orifice is situated in the proximity of the free end. The dispenser orifice is provided with internal closure member that is suitable for selectively closing the dispenser orifice from the inside.

Abstract: A sprayer includes a discharge valve assembly and includes an integrated poppet valve, spring and volume reducer. The spring includes more than omega-shaped form, each with relatively flat sides. The spring can have sides with portions sufficiently wide to substantially extend across the valve chamber to provide stability to the spring and prevent buckling. The flat sided omega-form construct is relatively easy to manufacture via molding and the ends of such construction provide suitable locations for integrated molding with the valve and the volume reducer.

Abstract: A dispensing device (4) for charging underfill agent into a gap between a substrate (K) and a chip (C) includes means for storing underfill agent (66, 67), a chamber (52) provided for containing substrate (K) to be charged with underfill agent and capable of being opened/closed, a dispenser (73) provided in the chamber (52) and discharging underfill agent introduced from the storing means (66, 67) into the gap between the substrate (K) and the chip (C), and a first pressure reducing means (46) for reducing the pressure in the chamber (52) at a predetermined vacuum pressure prior to the discharge of underfill agent by the dispenser (73). The dispensing device (4) can supply underfill agent with no bubbles to the substrate (K). A mounting system using this dispensing device (4) is also provided by the invention.

Abstract: The present invention relates to a dispensing device for dispensing a liquid or viscous substance, preferably foodstuff. At least one pump means (4) is provided to perform pump motions for sucking said substance (2) into the dispensing device (1) and dispense or discharge it therefrom. The pump means (4) is provided to divide inner parts of the dispensing device (1) into at least one suction chamber (30) and at least one dispensing or discharge chamber (31) which are interconnected through at least one transfer chamber (32). The pump means (4) is during a first pump motion in one direction (A) provided to suck substance (2) into the suction chamber (30) and simultaneously dispense or discharge substance (2) from the discharge chamber (31). The pump means (4) is during a second pump motion in the opposite direction (D) relative to the first pump motion provided to feed substance (2) from the suction chamber (30) and through the transfer chamber (32) into the discharge chamber (31).

Abstract: The present invention provides a dye pressing device which improves the container composition of a dye pressing device used in the form of aerosols and the mix ratio of mixture released from the device. Particularly, the present invention provides a dye pressing device comprising the containers of the dye pressing device used in the form of aerosols separately for the accommodation of the medicine and the oxidizing agent; the medicine container and the oxidizing agent container enable to release an equal amount of medicine and oxidizing agent respectively in equal time by the high pressure gas contained therein; a mix pail where the medicine released from the medicine container and the oxidizing agent released from the oxidizing agent container mix together for the first time; and coupled screws installed inside of the mix pail which processes a mix one more time for a high quality mix.

Abstract: A liquid delivering method and a liquid delivering device are provided, which solve the prior art problems including damages to a plunger and a valve seat. A liquid material delivering method includes the steps of advancing at high speed a liquid material delivering plunger with its distal end surface closely contacted with the liquid material, and subsequently abruptly stopping plunger driving means, thereby applying an inertial force to the liquid material to deliver the latter. A liquid delivering device includes a tubular metering section, a plunger internally contacting the metering section, a nozzle having a delivery port, a first valve for establishing communication between the metering section and the nozzle, a storage container for storing a liquid material, a liquid material feed valve (second valve) for establishing communication between the storage container and the metering section.

Abstract: The invention relates to a discharge device for preferentially liquid media with a housing (12), an actuation handle (20) which is formed so that it can move relative to the housing (12), and a transport device (16) which is formed such that in response to a movement of the actuation handle (20) relative to the housing (12) medium is transported through a discharge opening (24), whereby a blocking device (30) is provided through which the movement of the actuation handle (20) relative to the housing (12) can be restricted.

Abstract: Provided is a liquid food dispensing apparatus capable of dispensing a wide range of liquid foods having different fluid properties and dispensing specifications. The dispensing apparatus has a modular construction that allows it to be configured to accommodate a variety of liquid foods in a variety of applications. In one embodiment, the dispensing apparatus may include a product manifold, a depositor module, an actuator module, a nozzle, a lift mechanism, and a rotation mechanism. The product manifold distributes liquid food to the depositor module. The depositor module is actuated by the actuator module to draw a quantity of liquid food and discharge it. A nozzle may be attached to the depositor module so that the liquid food may be discharged in a desired pattern. The lift and rotation mechanisms lift the depositor module and rotate the nozzle so the liquid food may be dispensed in a variety of applications.

Abstract: Provided is a depositor module capable of dispensing a wide range of liquid foods having different dispensing specifications. The depositor module is adapted to draw liquid food from a pressurized product manifold or a hopper and dispense the liquid food. Further, the depositor module is adapted to deliver a broad range of liquid foods in different quantities and at different pressures for a variety of applications.

Abstract: A dispenser has a housing, and a variable-volume storage chamber formed within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed. A piston is mounted within the housing, and a one-way valve is mounted within the housing and coupled in fluid communication with the variable-volume storage chamber.

Abstract: A dispensing system for supplying containers with a fluid material provided from a source is provided. The dispensing system includes a chamber configured to be connected to receive the fluid material from the source and a piston configured for motion between predetermined limits for establishing controlled volumes of the fluid material. The dispensing system further includes a nozzle configured to receive the controlled volumes of the fluid material and to discharge the controlled volumes of the fluid material into the containers and a switching valve positioned directly between the piston and the nozzle, the switching valve configured to include a lumen that moves from a first position to a second position to regulate the discharge of the controlled volumes of the fluid material.

Abstract: The invention relates to a dispenser for delivering portions of liquid to pasty substances, having a storage container and a pumping chamber, the pumping chamber having at least one valve, and having a delivery head which can be displaced relative to the storage container and the displacement of which allows the substance to be delivered, the delivery head further having formed in it a delivery channel with a delivery opening, which delivery opening can be closed by a closure part which is removable, but is held in captive fashion on the delivery head. In order to specify such a dispenser for delivering portions of liquid to pasty substances which is configured in an advantageous manner, in particular, in respect of a closure part, it is proposed that the closure part is a sliding part which also forms a delivery-channel portion and interacts with a fixed closure pin.

Abstract: Provided is a nozzle retractable dispenser which includes a container (20); a cylinder (22); a piston (24); a pressing member (28); an elastic unit (30); a pumping button (36), in which a button portion (32) is formed at the upper portion of the pressing member (28), and a nozzle (34) communicating with the communication hole (26) is protruded in a lateral direction of the pressing member (28); and a cover member (40). Here, the pumping button (36) goes slidingly forward and backward with respect to the pressing member (28) at the state where the pumping button (36) has been elastically supported by the elastic unit (30), so as to be withdrawn and retracted in the lateral direction of the container (20). Accordingly, the nozzle can be withdrawn in a sufficient length in the lateral direction of a container during use, by a simple operation of slidingly manipulating the pumping button.

Abstract: The present invention relates to an apparatus for dispensing fluids, especially particulate matter, from a supply bin. The apparatus includes a plough that is movable at least partially in and out of the bin and which, when retracted, closes a matching aperture in the bin, whereby there is an adequate quantity of fluid above the plough.

Abstract: A fluid dispenser for dispensing a fluid, the fluid dispenser comprising: a main body, the main body defining a fluid reservoir for containing the fluid; a measuring reservoir; an output nozzle for selectively dispensing said fluid contained in said measuring reservoir; a valve in fluid communication with the fluid reservoir, the measuring reservoir and the output nozzle, the valve being configurable between a measuring configuration in which the fluid and measuring reservoirs are in fluid communication with each other and a dispensing configuration in which the measuring reservoir and the output nozzle are in fluid communication with each other; a piston mounted inside the measuring reservoir for reciprocating movement relative thereto between a piston first position and a piston second position, the piston substantially sealingly engaging the measuring reservoir; a piston actuator operatively coupled to the piston for moving the piston relative to the measuring reservoir between the piston first and second

Abstract: A manual pump dispenser includes a plunger head reciprocable between pressure and return strokes, and a pump body having an inlet valve for inletting of liquid product during each of the return strokes. A discharge valve assembly is fitted to a spout for permitting selective outletting of liquid product through the spout during each of the pressure strokes. The spout includes a bore having a predetermined diameter, with a unitary valve disposed substantially within the bore. The unitary valve is made of a material for permitting predetermined axial, or axial and radial expansion thereof under pressure from liquid product during each of the pressure strokes for thereby allowing liquid product to be discharged through a slitted opening in the unitary valve, and enabling rapid contraction thereof against a valve seat to prevent liquid product from being discharged through the slitted opening.

Abstract: A fill supply mechanism can include a pumping member that moves reciprocally within a pump cavity thereby causing fill material to be drawn into and expelled from the pump cavity. A valve member can be reciprocally movable and can allow fill material to be drawn into the pump cavity when in a first valve member position and allow fill material to be discharged from the pump cavity when in a second valve member position. A drive mechanism drives reciprocal motion of the pumping member and the valve member. The reciprocal motion of the pumping member and the valve member are along co-planar axes and can be along parallel co-planar axes.

Abstract: A toothpaste dispensing system includes a low-profile toothpaste dispenser with a housing, a pumping system disposed in the housing, the pumping system having a inlet and an outlet, the pumping system having a rest state and an active state, the pumping system ejecting toothpaste as it transitions from the rest state to the active state, and a low-force activator coupled to the pumping system to transition the pumping system from the rest state to active state. The system also includes a toothpaste refill coupled to the inlet of the pump. The dispenser and refill may be all or part of a dental hygiene kit.

Abstract: A dispenser has a housing, and a variable-volume storage chamber formed within the housing and defining a substantially fluid-tight seal between the chamber and exterior of the housing for storing a substance to be dispensed. A piston is mounted within the housing, and a one-way valve is mounted within the housing and coupled in fluid communication with the variable-volume storage chamber.

Abstract: A dispenser including a container portion and a dispensing and frictional engagement assembly, arranged for sealing engagement with the container portion, the dispensing and frictional engagement assembly including a resilient, flexible washing engagement portion and a manually controllable dispensing outlet assembly arranged to dispense a liquid from the container portion at a location spaced from the resilient flexible washing engagement portion, the resilient flexible washing engagement portion being isolated from the interior of the container portion whereby backflow of liquid from the flexible washing engagement portion normally is prevented from entering the interior of the container portion.

Abstract: A device in an automatic machine feeds metered quantities of a paste substance to be introduced into containers by a filling nozzle. In the device, a central body has a bore defining a cylinder closed at top by a cap, and a parallel inlet channel leading to the bore through an inlet aperture. An inlet conduit block is fastened to the central body and connects the inlet channel with a hopper. An exhaust conduit is fastened to the central body and connects an outlet aperture, made in the cylinder, with a conveying device associated to a filling nozzle. A piston having a longitudinal groove is slidingly inserted in the cylinder. A power apparatus moves and rotates the piston along the cylinder, so as to bring the groove to face respectively the inlet opening, during a suction step with a downward motion of the piston, and the outlet aperture, during a delivery step with an upward movement of the piston.

Abstract: The inventive valve comprises a dosing chamber (20) connected to a dispenser (16) provided with input and output orifices (7, 8) which are connected to said dosing chamber (20) when the dispenser (16) is in a position (21), an injection orifice (9) being isolated. When the dispenser (16) is in a position (23), the input and output orifices (7,8) are isolated from the dosing chamber (20) and from an injection orifice (9) which are connected to each other. In addition, said device comprises a source of polymerisable material which is provided with a container (5), a continuous pump (6) and a control unit (3) for control elements (19, 24) of the valve (2).

Abstract: The tip-stop mechanism for an aerosol container has a needle valve placed into a passage area and closes discharge hole due to plate springs engagement with tapered surfaces of the needle valve. An operation lever is supported on a pivot shaft and when pressed downward forces a portion of the lever to cause the needle valve to move backward, opening the discharge hole. After that, the operation lever engages the upper surface of the spout and moves downward together with the spout and the stem, thereby the lever is shifted to an operation mode.

Abstract: A dispenser for dispensing liquids comprising an inner displacement member nested in an outer displacement member. The inner member is moveable between two end positions within the outer member by an actuator. The actuator is arranged to move the outer displacement member into a dispensing position when the inner displacement member is in one of its end positions. The displacement members can be pistons and/or bellows.

Abstract: A spout cover for a spout having an outlet end includes a first member, having a deflector, mounted to a second member having a liquid soap reservoir and a dispenser for dispensing liquid soap from the liquid soap reservoir toward the deflector. A receiving area is defined between the first and second members for receiving the spout. The first member is movable relative to the second member between a first position permitting the spout to be received in the receiving area and a second position locating the deflector underneath the outlet end of the spout and preventing withdrawal of the spout from the receiving area.

Abstract: A disposable concentrate pump where the small pump body is part of a liquid collapsible bag reservoir, and the actuating solenoid is mounted in the dispenser. When a new bag is loaded, the attached pump body is inserted into a solenoid. When the bag is empty the in-bag part of the pump will be disposed of, along with the empty bag.

Abstract: A dispenser includes a housing having a sidewall with first and second axial ends. A container has first and second end portions with the second end portion engaged with the housing such that the container extends from the first axial end of the housing. A plunger having first and second sides is disposed in the interior cavity of the container. The interior cavity of the container and the first side of the base cooperatively define a product cavity. The interior cavity of the container and the second side of the base cooperatively define an air cavity. A valve mechanism is in engagement with the second end portion of the container. The valve mechanism includes a nozzle defining an orifice and an accumulator defining a pumping chamber. The pumping chamber is adapted to receive a portion of the product in the container. A piston is selectively slidable in the pumping chamber.

Abstract: A pump mechanism of liquid soap dispenser includes a cross pipe secured to a first check valve, a spout having a second check valve, and an abutment member respectively; a spring biased plunger partially inserted into the abutment member; and a cap on an end of the plunger. In response to depressing the cap the plunger slides to compress the spring, close the first check valve, and decrease a liquid storage space of the pipe for forcing pressurized soap to open the second check valve prior to flowing out of the spout. In response to removing the depressing force the spring pushes the plunger to its inoperative position to create a vacuum in the space, open the first check valve, permit soap supply to flow into the space through the first check valve, and close the second check valve at an end of returning the plunger to its inoperative position.

Abstract: A pump intended to be mounted on a bottle, so as to allow the dispensing of a liquid contained in the bottle, includes a needle for closing an ejection orifice that is separate from a dosing sleeve. The needle is mounted on the sleeve by means of a device for the reversible movement of the needle between a closure position and an ejection position, the device being actuated by interference between the sleeve and a piston when a push button is moved on a hoop.

Abstract: [Object] To provide a liquid delivery method and apparatus which can suppress generation of turbulent flows and air bubbles, can prevent the liquid from flowing unintentionally from a suction port to a discharge port, can avoid generation of chips, are hard to damage, and can satisfactorily deliver the liquid.

Abstract: A pump dispenser suitable for dispensing toothpaste in which a pump chamber has a resiliently flexible flap outlet valve leading into a discharge passage leading to a discharge nozzle. The discharge nozzle features a closure valve, in the form of a concave wall with radial slits, which opens only under appreciable forward pressure. When released, the closure valve closes and retracts forcibly, giving a clean cut-off of product and a degree of backflow via the large outlet valve area of the flap valve as it closes.

Abstract: The invention relates to a microdispenser (1) for dispensing a liquid sample in a dispensing device, with a sample container (2) for receiving the liquid sample, and with a nozzle (7) for dispensing the sample located in the sample container (2). The microdispenser (1) with the filled sample container (2) can in this case be stored independently of and fluidically separately from the dispensing device, without the sample escaping from the sample container (2) during storage.

Abstract: An apparatus and system are disclosed for dispensing a product such as toothpaste. The apparatus includes a body; an actuator, slideably connected to the body, and configured to open a gate to dispense a product; a nozzle configured to wet the gate with a fluid in response to movement of the actuator; and a fluid source coupled to the nozzle. A system for dispensing product is also presented. The system includes a body; an actuator slideably connected to the body, and configured to open a gate to dispense a product; a nozzle configured to wet the gate with fluid in response to movement of the actuator; a fluid source coupled to the nozzle; a piston configured to discharge the product; and a pump configured to draw fluid from the fluid source to wet the gate.

Abstract: A dispenser for dispensing a metered volume of a fluid product having a storage chamber for storing the fluid product, an outlet orifice through which the fluid product is dispensable from the dispenser and a metering chamber is disclosed. The metering chamber has an outlet opening which places the metering chamber in fluid communication with the outlet orifice, a transfer opening through which the fluid product is transferable between the storage and metering chambers, and a boundary wall structure which is cyclically movable between a first configuration, in which the transfer opening is opened, and a second configuration, in which the transfer opening is closed. Each cycle of movement which commences at, and ends in, the second configuration results in a metered volume of the fluid product being transferred from the storage chamber to the metering chamber via the transfer opening and dispensed from the outlet orifice via the outlet opening.

Abstract: The invention relates to a manually-actuated metering pump of simple design, which is intended for a rigid container. The inventive metering pump is of the dual valve type, comprising a lower inlet valve and an upper ejection valve which are disposed at the input and output respectively of a metering chamber which is slidably mounted on the lower valve. Moreover, said lower valve is fixed to a hollow tube which communicates with the inside of the container. The invention can be used for dispensing fluid products.

Abstract: A dispenser head for mounting on the actuator rod (43) of a fluid dispenser member (4), the rod being displaceable down and up along an axis (X), the head comprising a bearing surface (22) for displacing the head and for actuating the dispenser member, the head further comprising a dispenser endpiece (23) that internally defines an endpiece channel (25) that opens out to the outside at a dispenser orifice (26), said endpiece presenting an elongate configuration with a connection end connected to the remainder of the head and a free end (24), the dispenser orifice being situated in the proximity of the free end, the head being characterized in that the dispenser orifice is provided with internal closure means (16) that are suitable for selectively closing the dispenser orifice from the inside.

Abstract: The invention relates to a device for processing an edible product in the form a viscous to pasty mass (1), especially an edible product based on a fat mass, such as chocolate, or based on water, such as ice cream. Said device comprises a dosing unit (2) for the dosed delivery of a specific volume of the mass (1) to shaping units (13). The movement of the displacement element (6) determining the dosage volume is performed via servo drive (9) while an inlet (4) and an outlet (5) are closed and opened via servo drive or pneumatic drive, respectively. Preferably, the displacement element is embodied as a combined lifting/rotating plunger (6) which can perform a linear movement for a suctioning lift and a dosing lift while being able to perform a rotary movement for opening and closing the inlet (4) and the outlet (5), i.e. a valve function.

Abstract: The invention relates to a dispenser (1) for liquid and/or pasty masses, comprising a pump chamber (9) with an inlet (10) and an outlet valve (11) and a dispenser head (12), wherein the dispenser head (12) is provided with an essentially cup-shaped lower piece (8), forming a separating wall to a reservoir (2) with a return spring (5) arranged between the lower piece (8) and the dispenser head (12) which is supported at one end on the dispenser head (12) and on the lower piece (8) at the other end. According to the invention, a conventional dispenser may be improved by provision of a recessed groove (26) running in the lower piece (8) through the separating wall, radially external to the seat of the return spring (5) on the lower piece (8) in which a cover for the dispenser head (12) may be housed on operation.

Abstract: The invention relates to a pump for a liquid product dispenser, which includes a reservoir and interacts with a manually actuatable element provided with an injection orifice. The pump includes a body embodied in the form of a single piece and including a seat which covers the reservoir and is provided with an intake orifice and a flap, which is mounted on the seat by means of a joint associated with an elastic return means which enables the flap to be reversibly tilted towards the seat, by pressing on the actuating element, in such way that the injection orifice is opened and the intake orifice is simultaneously closed.

Abstract: The invention relates to a triggering and dispensing head to be mounted on a pump for a liquid product dispenser provided with an exhaust conduit wherein said head comprises a body provided with an ejection channel closable by a flap which comprises a center punch translationally displaceable in the channel and hingeable about a drive billet connected to an axial rod sliding in said exhaust conduit.

Abstract: A liquid dispenser apparatus includes a container for housing a liquid, and a spout assembly for dispensing spouts of the liquid from the container. The spout assembly includes a stopping member for stopping dripping of the liquid after each dispensing, thereby allowing the spout assembly to face substantially toward a ground level to avoid splashing a user with liquids.

Abstract: Discharge device and discharge head. The invention relates to a discharge device (10) for discharging liquid medium, with a pump device (32) with a variable volume pump chamber (34), a discharge opening (54) for the liquid medium, a feed path (40) between the pump device (32) and the discharge opening (54), and an outlet valve (54, 62a) which is designed to open the discharge opening (54) as a function of the pressure in the feed path (40), and to a discharge head provided for this purpose. According to the invention, the discharge device or the discharge head has a gas-permeable and liquid-tight air outlet (80) which connects the pump chamber (34) or the feed path (40) to an external environment. For use at a required high limit pressure of the outlet valve.

Abstract: A pump for dispensing a liquid contained in a bottle including a shrunk-fit section including an orifice for communicating with the liquid, a pushbutton including an orifice for ejecting the liquid, a dosing sleeve integrating a needle for plugging the ejection orifice and a device for bi-directional movement of the needle, a dosing piston including a channel equipped with a closing valve for the orifice, the piston being mounted in translation, in a leak-tight manner, inside the shrunk-fit section, between an open position and a closed position of the orifice, by means of the valve, an actuating member integral with the device for moving the needle and slidably mounted inside the dosing piston, by pressing on the pushbutton, the sliding assembly being set up to actuate the moving device and to position the valve in closed position so as to enable ejection of the liquid from the dosing chamber.

Abstract: A valve assembly for a fluid dispenser includes a housing having at least a first opening and a second opening, and a valve member fitted in the housing, the valve member being rotatable about an axis and comprising a first channel, extending along said axis and communicating with the first opening in the housing, and at least two outlet channels radially extending from the first channel to the circumference of the valve member, wherein each of the radially extending outlet channels can be brought in register with the second opening by rotating the valve member.

Abstract: An apparatus for applying fluids such as adhesive, in particular hot melt adhesive, to a substrate movable relative to the apparatus. The apparatus includes a main body in which a fluid feed passage is connectable to a fluid source, and a nozzle arrangement which is arranged on the main body and which is separable therefrom and in which there is arranged a distributor passage by way of which the nozzle opening communicates with the fluid feed passage. The apparatus also includes a closure body which is movable with a drive device and which is arranged in the distributor passage and by means of which the length of the distributor passage which can be acted upon with fluid is variable. The closure body can be fixed in various positions by means of a fixing device.

Abstract: A fluid dispensing system includes a pump body configured to couple to a container. The pump body defines fluid inlet openings and a pump cavity. A shroud cover covers the pump body to draw fluid from the container. An inlet valve allows fluid from the container to enter the pump cavity through the fluid inlet openings. A plunger is slidably received in the pump cavity, and the plunger defines a fluid passage with a dispensing opening through which the fluid is dispensed. A shipping seal seals the fluid passage during shipping to minimize leakage of the fluid during shipping. An outlet valve is disposed inside the fluid passage to minimize the height of the fluid between the outlet valve and the dispensing opening so as to minimize dripping of fluid from the dispensing opening. The pump body includes a venting structure to normalize the air pressure inside the system.

Abstract: A method of cleaning a filter element includes directing a jet of pressurized gas from a nozzle onto a filter element, with the jet having a non-round cross-sectional shape that is a same general cross-sectional shape as the opening in a tube sheet holding the filter element. The nozzle has a channel for the pressurized gas that is obstruction-free. A method of designing a nozzle arrangement for directing a jet of pressurized gas onto a filter element includes designing a nozzle arrangement to generate a jet of pressurized gas having a non-round cross-sectional shape that is a same general shape as a non-round shape of an aperture in a tubesheet holding the filter element. The nozzle arrangement includes at least one nozzle, each nozzle has an unobstructed flow channel, and each nozzle is cylindrical in shape and has at least one open slot. A pressurized gas generator includes a compressed air manifold storing pressurized gas, a valve in fluid communication with the manifold, and a nozzle arrangement.