Abstract: [Object] To provide a fluid control apparatus having a diaphragm structure and small flow path resistance. [Solving Means] A fluid control apparatus according to the present technology includes a first space, two flat plate members, a drive mechanism, a second space, a first check valve, and a second check valve. The first space has an inlet and an outlet. The two flat plate members face each other via the first space, and at least one of the flat plate members is an elastic body having flexibility. The drive mechanism bends the elastic body. The second space adjoins the first space, communicates with the first space via the inlet, and has a suction port. The first check valve allows fluid to flow from the suction port to the first space via the inlet. The third space adjoins the first space, communicates with the first space via the outlet, and has a discharge port. The second check valve allows the fluid to flow from the first space to the discharge port via the outlet.

Abstract: A pump includes a vibrating plate, a flow path forming member, a pump chamber, and a film valve. The vibrating plate is provided with a piezoelectric element, vibrates due to distortion of the piezoelectric element, and has a gap on an outer periphery. The flow path forming member is disposed so as to face the vibrating plate, and has a hole in a portion facing the vibrating plate. The pump chamber is surrounded by the vibrating plate and the flow path forming member, and has a central space communicating with the hole and an outer edge space communicating with the gap. The film valve is disposed in the pump chamber. The film valve is in contact with the vibrating plate and the flow path forming member when a pressure in the central space is lower than a pressure in the outer edge space.

Abstract: A fluid driving system includes a vibration unit, a piezoelectric element, a signal transmission layer, a plane unit, and a protrusion. The piezoelectric element includes a first electrode and a second electrode electrically isolated from each other. The signal transmission layer includes a first conductive zone and a second conductive zone. The first electrode of the piezoelectric element is electrically connected to the first conductive zone of the signal transmission layer, and the second electrode of the piezoelectric element is electrically connected to the second conductive zone of the signal transmission layer. The plane unit has at least one hole. The piezoelectric element, the signal transmission layer, and the plane unit are located at one side of the vibration unit. The protrusion is located between the vibration unit and the plane unit, and the protrusion corresponds to and protrudes toward the at least one hole.

Abstract: A micro fluid actuator includes an orifice layer, a flow channel layer, a substrate, a chamber layer, a vibration layer, a lower electrode layer, a piezoelectric actuation layer and an upper electrode layer, which are stacked sequentially. An outflow aperture, a plurality of first inflow apertures and a second inflow aperture are formed in the substrate by an etching process. A storage chamber is formed in the chamber layer by the etching process. An outflow opening and an inflow opening are formed in the orifice layer by the etching process. An outflow channel, an inflow channel and a plurality of columnar structures are formed in the flow channel layer by a lithography process. By providing driving power which have different phases to the upper electrode layer and the lower electrode layer, the vibration layer is driven to displace in a reciprocating manner, so as to achieve fluid transportation.

Abstract: The present disclosure relates to a system (100) for use of a pharmaceutical product. The system comprises a container (102) accommodating a pharmaceutical product, the container (102) comprising a wireless communication unit (112) and a memory (116) which stores pairing-specific information for one or more medical devices (104), and a medical device (104) enabled for wireless communication with the wireless communication unit (112) of the container (102) and configured to read the pairing-specific information from the memory (116) of the container (102) to verify whether the container (102) is permitted to be used by the medical device (104).

Abstract: A pump includes a first diaphragm, a second diaphragm, and a circumferential wall, which define a pump chamber, and a driver. The driver vibrates the first diaphragm and the second diaphragm in a flexural mode to cause pressure fluctuation in the pump chamber. The first diaphragm has a first hole to which no check valve is attached. At least one of the first diaphragm and the second diaphragm has a second hole to which a check valve is attached. The first hole is located at a portion that coincides with an axis orthogonal to a center of the first diaphragm and a center of the second diaphragm. The second hole is located at a portion that does not coincide with the first hole when viewed in a direction in which the axis extends.

Abstract: A micro fluid actuator includes a first substrate, a chamber layer, a vibration layer, a first metal layer, a piezoelectric actuation layer, a second metal layer, a second substrate, an inlet layer, a resonance layer and an aperture array plate. The first substrate includes a plurality of first outflow apertures and a plurality of second outflow apertures. The chamber layer includes a storage chamber. The second metal layer includes an upper electrode pad and a lower electrode pad. While driving power having different phase charges is provided to the upper electrode pad and the lower electrode pad to drive and control the vibration layer to displace in a reciprocating manner, the fluid is inhaled from the exterior through the inlet layer, converged to the storage chamber, compressed and pushes out the aperture array plate, and then is discharged out from the micro fluid actuator to achieve fluid transportation.

Abstract: The present disclosure relates to a system (100) for administering a pharmaceutical product. The system comprises a container (102) accommodating a pharmaceutical product. The container (102) comprises a wireless communication unit (112) and a memory (116) which stores an administration scheme specifically adapted to the pharmaceutical product accommodated in the container (102). The administration scheme specifies at least one administration-related parameter to be adhered to in administering the pharmaceutical product to a patient. The system further comprises a wireless communication device (104; 206; 208) configured to read the administration scheme from the memory (116) of the container (102) and to perform at least one action based on the administration scheme.

Abstract: A carburetor has a carburetor housing wherein an intake channel section is arranged. A fuel opening opens into the intake channel section. The carburetor has a fuel pump with a pump membrane delimiting a pump chamber connected to a fuel inlet. A pressure controller has a control membrane separating a control chamber from a compensation chamber. The control chamber is connected to a fuel outlet leading out from the carburetor. The compensation chamber is connected to a compensation connection. The carburetor housing has a carburetor body, a pump cover and an intermediate part arranged therebetween. The fuel inlet, the fuel outlet and the compensation connection are formed on the intermediate part. The fuel inlet, the fuel outlet and the compensation connection are arranged on the side of the carburetor that faces away from the combustion engine.

Abstract: A valve includes a lower valve housing, a diaphragm, and an upper valve housing. A top surface of a piezoelectric pump is bonded to a bottom surface of the lower valve housing. A circular hole portion is provided in a central portion of a region of the diaphragm that opposes a projecting portion of the lower valve housing. The diaphragm is bonded to the upper valve housing and the lower valve housing, and a divided interior of a valve housing configures a first lower valve chamber, a second lower valve chamber, a first upper valve chamber, and a second upper valve chamber. A groove is located in a wall portion of the upper valve housing that opposes the diaphragm in the first upper valve chamber.

Abstract: This disclosure relates to medical fluid cassettes and related systems and methods. In certain aspects, a medical fluid cassette includes a base having a first region and a second region, a first membrane overlying the first region of the base, and a second membrane overlying the second region of the base. The second membrane is configured to rebound away from the base when a force used to press the second membrane toward the base is released.

Abstract: Some embodiments are directed to a system 10 for the application of topical negative pressure therapy to a site 18 on the body of a mammal. Some embodiments of the system 10 comprise a piston 22 and cylinder 24 device 12 having a self-contained power source for the generation of a reduced pressure and for aspirating the site 18. Some embodiments of the system 10 comprise a dressing 14 sealably surrounding the site 18 that can be operably connected to the device 12 by a conduit means 16 to apply the reduced pressure to the site 18.

Abstract: A detachable ball inflation and deflation device is disposed in a cavity of a ball. The device includes an air inflation unit, a non-return unit, and a reinforcement sleeve. By applying a force to press the air inflation unit repeatedly, the air outside the ball passes the non-return unit to enter the inside of the ball so as to inflate the ball, and the air filled into the ball won't deflate. The device has the function to deflate the ball in a quick way. When the air inflation unit is pulled out of a portion of the ball, the air inside the ball can be deflated quickly, so that the ball can be carried and stored conveniently.

Abstract: Provided is a pumping system that includes a parallel dual chamber pumping mechanism and an attachable disposable cassette. The disposable cassette includes a multi-laminate membrane which facilitates efficient, accurate and uniform delivery of fluids. The multi-laminate membrane is held in intimate contact with the pumping fingers of the pumping mechanism by electrostatic or magnetic attraction, thereby allowing the pump to pull a vacuum without the need for a preloaded elastomeric pumping segment.

Abstract: This disclosure relates to medical fluid cassettes and related systems and methods. In certain aspects, a medical fluid cassette includes a base having a first region and a second region, a first membrane overlying the first region of the base, and a second membrane overlying the second region of the base. The second membrane is configured to rebound away from the base when a force used to press the second membrane toward the base is released.

Abstract: An apparatus for delivery of fluids to a patient includes an inlet tube and an outlet tube connected to each other at an angular joint. A rotary valve and a piston are fitted to the angular joint forming a chamber. The rotary valve is provided with a priming channel notch and a pumping notch. For priming operation with the fluid delivery apparatus, a user sets the rotary valve to a priming position. During pumping operation, the rotary valve rotates in coordination with the piston to transfer a quantum of fluid from the inlet tube to the outlet tube via the chamber. A second piston is optionally provided on the outlet tube for smoothing out flow rate pulsations.

Abstract: Methods of and devices for testing medical pumps via tracking induced bubble trajectories within a fluid flow conduit comprising a valve and methods of synchronized corrections of flow data estimates.

Abstract: A work apparatus has an internal combustion engine for driving a work tool of the work apparatus and a fuel pump which is driven by the engine and delivers fuel from a fuel tank to the engine. The work apparatus has a feed pump which is to be actuated manually by the operator. The fuel pump and the feed pump form one assembly which is arranged outside the fuel tank. The fuel tank has a tank wall which delimits the tank interior. An advantageous arrangement and satisfactory cooling of the assembly are achieved if the assembly is arranged at least partially on the tank wall.

Abstract: A disposable cassette intended for a metering pump for infusion consisting of just two components, namely, a hollow first component (1) forming a pump body, and a second component (5) collaborating with the hollow first component (1) to form a pumping zone (6) and comprising a flexible part (10) characterized in that the second component (5) further comprises a rigid part (9) secured to the flexible part (10) and able to be assembled with the hollow first component (1). The invention also relates to a method for manufacturing such a disposable cassette.

Abstract: First and second structures are connected by helical fibers. The orientation between the first and second structures are changed, and by doing so, the positions of the helical fibers are correspondingly changed. The position of change of the helical fibers can be used for a pumping effect, or to change some other fluidic characteristics. One other fluidic characteristics, for example, may use the movement of the helical fibers as a valve.

Abstract: A system and method of accurately pumping a fluid using tubing of variable inner diameter and material is disclosed. The disclosed pump comprises a pumping mechanism configured to compress and release a portion of a flexible tube to cause fluid to flow along the flexible tube, a gauging apparatus, and a vacuum apparatus. The gauging apparatus is configured to determine the inner diameter of the flexible tube, which value is used in calibrating the pumping rate of the pump. The vacuum apparatus is configured to reduce the ambient pressure in a volume surrounding the portion of the flexible tube, thereby causing the flexible tube to fully expand to its original outside diameter when the flexible tube is released by the pumping mechanism.

Abstract: The invention provides a finger-type peristaltic pump (2) having a body (4) and a housing (6). The body contains two or more finger-type valves (16) and a processor (22) configured to operate the valves according to a predetermined temporo-spatial pattern. The housing has a passageway (18) configured to receive a conduit. The housing has a first position in which a conduit in the passageway is positioned adjacent to the valve fingers, and a second position in which a conduit in the passageway is not adjacent to the valve fingers. The invention also provides a housing for use in the pump of the invention.

Abstract: A pump facility for an earmold of a hearing device communicates by way of a channel facility with a variable-volume element of the earmold. A medium can flow through the channel facility to the variable-volume element and away from the variable-volume element. A filling mechanism is embodied for pumping the medium through the channel facility to the variable-volume element. In addition a drainage mechanism is embodied for actively pumping and conveys the medium away from the variable-volume element through the channel facility.

Abstract: The present invention relates to a liquid channel device capable of easily opening the liquid channel from the closed mode, including a base plate in which a liquid channel, through which a liquid containing at least one of a sample and a reagent, flows, and a metering chamber for holding the liquid, are formed to at least one side thereof, the metering chamber has a liquid transport section for transporting the liquid inside the chamber downstream, and this liquid transport section is operated by means of external pressing on a cover plate in the area opposite the metering chamber.

Abstract: A fluid control device includes a vibrating plate unit, a driver, and a flexible plate. The vibrating plate unit includes a vibrating plate with first and second main surfaces, a frame plate surrounding the vibrating plate, and a link portion linking the vibrating plate and the frame plate and elastically supporting the vibrating plate against the frame plate. The driver is on the first main surface of the vibrating plate, and vibrates the vibrating plate. The flexible plate having a hole faces the second main surface of the vibrating plate, being fixed to the frame plate. At least a portion of the vibrating plate and the link portion are thinner than the thickness of the frame plate so that the surface of the portion of the vibrating plate and the link portion, on the side of the flexible plate, can separate from the flexible plate.

Abstract: A fluid control device includes a vibrating plate including a first main surface and a second main surface, a driver that is provided on the first main surface of the vibrating plate and vibrates the vibrating plate, and a plate that is provided on the second main surface of the vibrating plate and has a hole provided thereon. At least one of either the vibrating plate or the plate is positioned between the hole and a region of the vibrating plate facing the hole, and includes a projection projecting in a direction intermediate between the hole and the region of the vibrating plate facing the hole.

Abstract: An infusion pump uses an improved shuttle mechanism to more reliably pump liquids in low volumes for medical and other purposes. The improved shuttle uses linear translation and wider, symmetric jaws to grasp infusate tubing and pump liquid infusate through the tubing. Adjustment of the linear motion allows a user to also adjust a pumping volume of the infusion pump. Other shuttles with wider jaws may also pump infusate using a rotary motion. In addition, more than one shuttle, such as two or three shuttles, may be used to approximate continuous pumping. A series of several smaller linear shuttles with sequential actuation may be used as a linear peristaltic pump for general peristaltic pump applications.

Abstract: It comprises driving means (2), with shaft (5), connected to an eccentric (8), at least two membranes that block a similar number of apertures (4) in a box (1), characterised in that it comprises: connecting rod 6, the centre of which houses a single bearing (9) for each eccentric (8), through which referred shaft (5) passes, and at least two actuators (7) that join membranes (3) to connecting rod (6), with said actuators (7) articulated to connecting rod (6).

Abstract: A medical device includes an interface unit body, which is configured to hold a portion of a flexible infusion tube. A hinge insert is fixed to the interface unit body and is configured to engage a hinge receptacle, which defines a hinge axis, on an infusion pump. A catch insert is fixed to the interface unit body and is configured to lock onto a catch receptacle on the infusion pump upon rotation of the mechanical interface unit about the hinge axis while the hinge insert engages the hinge receptacle, so as to bring the tube into engagement with a peristaltic mechanism of the infusion pump in order to enable the peristaltic mechanism to propel a fluid through the tube.

Abstract: An electromagnetic actuator for a microfluidic pump of the type that causes periodic pinching and releasing against the walls of a fluidic channel, e.g., a tube. At least one permanent magnet is placed against the walls of the fluidic channel, and located in an area with magnetic fields, produced by coils that are radially symmetric to the channel. The permanent magnet is cause to press and release against the wall of the fluid channel to cause a fluid flow through the channel.

Abstract: A fluid transporting device comprises a tube frame having a tube guide wall for arranging a tube having an elasticity in an arcuate shape, and a rotary pressure mechanism having a plurality of rollers. The rotary pressure mechanism is arranged, when the tube is arranged in the tube frame, on the side opposite to the guide wall side of the tube, such that its center of rotation is aligned with the center of the arc of the tube guide wall. A plurality of push pins are interposed between the tube and the rotary pressure mechanism and are arranged radially of the center of rotation of the rotary pressure mechanism. A switching mechanism moves at least one of the rollers to a position for the push pins to release the tube and a position for the push pins to press the tube.

Abstract: The ball valve device comprises a tubular body in metal material, having a cylindrical wall conformed with cup-shaped internal protrusions to retain a ball shaped valving member, preventing the same valving member to be entrained by a fluid flowing through the valve device. The internal protrusions are performed by radially deforming inwards the cylindrical wall of the tubular body at one or more angularly spaced apart deformable areas. The tubular body provided with the ball retaining protrusions is suitable for any valve device, such as ball check valves pumping units for and/or ducts.

Abstract: A pump is provided that includes a body made at least partially of an elastomeric material and an inlet port and an outlet port, with each port being coupled to the body. The pump further includes a flow passage formed in the body and extending between the inlet port and the outlet port, with at least a portion of the flow passage being normally closed and with the inlet port being fluidicly uncoupled with the outlet port when the pump is in a free-state condition. An actuating device is coupled to the body and is operable for sequentially deforming the body to create a cavity within the normally closed portion of the flow passage, the cavity being in fluid communication with the inlet port, thereby drawing a packet of fluid from the inlet port into the cavity and propagating the cavity and the packet of fluid contained therein toward the outlet port.

Abstract: The invention provides a finger-type peristaltic pump (2) having a body (4) and a housing (6). The body contains two or more finger-type valves (16) and a processor (22) configured to operate the valves according to a predetermined temporo-spatial pattern. The housing has a passageway (18) configured to receive a conduit. The housing has a first position in which a conduit in the passageway is positioned adjacent to the valve fingers, and a second position in which a conduit in the passageway is not adjacent to the valve fingers. The invention also provides a housing for use in the pump of the invention.

Abstract: The invention relates to a micropump for peristaltic pumping of a liquid medium and to a device which contains a peristaltic micropump and which is for metered administration of a liquid drug.

Abstract: A hand operable pump device for pumping fluids includes a hollow body and an oval piston. The hollow body includes an inlet port and an outlet port. The inlet port is provided with a one-way valve permitting fluid flow into the pump. The outlet port is provided with a one-way valve permitting fluid flow out of the pump. The oval piston is designed to be pressed inwardly from an initial position by the hand, decreasing the volume of an oval chamber with a corresponding oval cross-section. The chamber is located within the pump and is fluidically connected with the inlet and outlet ports. The oval piston is further designed to return to the initial position when released, increasing the volume of the chamber.

Abstract: A hand operated fluid dispensers comprised of a sealed flexible reservoir chamber containing a fluid, a flexible pump chamber encased by and drawing fluid from the reservoir, and a pump cycled by external pressure applied through a reservoir wall. This class of simple, inexpensive, disposable dispensers is particularly useful in packaging cosmetics, foodstuffs, and healthcare products. As pocketable dispensers they are popular for dispensing small amounts of stored viscous liquids easily damaged when exposure to the atmosphere, a condition where sealed reservoirs coupled with airless pumps working together successfully prevent such product contamination and deterioration. A method of improved healthcare employing such pump dispensers containing a hand sanitizing fluid is also discussed.

Abstract: A pump for dispensing soap from a container in a dispenser, the pump including a base, a flexible dome attached to the base defining a chamber therebetween, an inlet and an outlet formed in the base and opening into the chamber, the inlet being in fluid communication with the container, and wherein the dome has a fold line that facilitates collapsing of the dome. The dome may include an inwardly extending flange that selectively closes the inlet.

Abstract: A system for the metering and delivery of small discrete volumes of liquid is comprised of a small or minimal number of inexpensive components. One such component is a movable member, such as a miniature precision reciprocating displacement pump head, which is driven by an actuator that comprises a shape memory alloy material. The operating mechanism of the system is of little or minimal complexity. The system facilitates the precise metering and delivery of the small discrete volumes of liquid. Potential applications for the system include subcutaneous, long-term, automated drug delivery, for example, the delivery of insulin to a person with diabetes. In such an application, the small, simple and inexpensive nature of the invention would allow for its use as both a portable and a disposable system.

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: A vessel (10) and a method for agitating a liquid (50) in a main cavity (16) of t he vessel (10), are provided. The vessel (10) includes a dividing member (40), extending deformable pump cavity (20). To agitate the liquid (50), a user presses a flexing wall (26) of the pump cavity (20), in pumping cycles, to discharge liquid from the pump cavity (20) through nozzles (42,44) into the main cavity (16). The dividing member (40) has a sloping upper surface, which causes additives (38) to collect in the region of the nozzles (44), to be agitated more effectively.

Abstract: A pump for generating fluid flow in an elastic tubular conduit. The pump comprises a plurality of electrically operated valves, each valve being positionable adjacent to the conduit. Each valve has a valve head configured to alternate from a first position in which the lumen of the conduit adjacent to the valve head is unobstructed and a second position in which the lumen of the conduit adjacent to the valve head is obstructed. The pump also comprises a driver configured to control the positions of the valve heads, so as to execute a predetermined temporo-spatial array of valve head positions.

Abstract: A valveless MEMS micropump capable of improved efficiency and performance is disclosed. The micropump includes two adjoining chambers separated by a piezoelectric actuated pump membrane. The micropump moves fluid through the chambers through diffuser elements characterized by differential directional resistance to fluid flow by piezoelectric actuation of the pump membrane.

Abstract: A peristaltic pump assembly for moving a working fluid. The pump assembly includes an expandable fluid that changes in volume due to the presence of a magnetic and/or electric field. The pump assembly also includes a flexible member interposed between the working fluid and the expandable fluid. The pump assembly further includes a field generator operable to cause the expandable fluid to change in volume by applying the magnetic and/or electric field to the expandable fluid. This, in turn, moves the flexible member to increase the pressure of the working fluid to thereby move the working fluid.

Abstract: A vibratory pumping machine including a pumping chamber disposed within a housing for the machine having an inlet tube that is insertable into a container having a liquid therein to withdraw the liquid from the container upon actuation of the pumping mechanism also located within the housing. The chamber includes an oscillating rod that engages a resilient outlet member to form a vacuum within the chamber which draws the liquid upwardly through the tube into the chamber for dispensing through the outlet member. A mechanism including the pumping chamber can be utilized to withdraw liquids from within container of various shapes and sizes, as well as to introduce other fluids, such as gases, into containers containing such liquids.

Abstract: A pulse generator has a rigid body with a resilient flow conduit passing therethrough. Pressure is periodically selectively applied to the interior of the body which compresses the flow conduit and induces a pressure pulse in the fluid contained therein. The pulse generator may be used as a stand alone pump or in concert with a continuous flow pump to provide a pulsatile output flow having customized waveform characteristics. The pulse generator may be used with medical equipment such as a heart-lung bypass machine or a dialysis machine.

Abstract: A fluid pumping mechanism in one embodiment includes a fluid reservoir, and a monolayer film extending over a portion of the fluid reservoir, wherein fluid is moved through the reservoir by movement of the film from a first position to a second position, the film including a first polyolefin. In another embodiment the fluid pumping mechanism includes a fluid reservoir; and a multiple layer film extending over a portion of the fluid reservoir, wherein fluid is moved through the reservoir by movement of the film from a first position to a second position, the film including an inner layer and an outer layer, the inner layer including an ethylene containing polymer.

Abstract: A medical pump, for use with a cassette having a pumping chamber, includes a pumping element with a piston slider assembly which intermittently pressurizes the pumping chamber during a pumping cycle and has a piston head connected to a main body with a single pressure sensor positioned therebetween. A camshaft is associated with the pumping element, an inlet control element, and an outlet control element for closing the pumping chamber to flow when the pumping chamber is pressurized. A processing unit receives pressure and position data from the pressure sensor and a position sensor associated with the pumping element, and processes this data to determine the operating condition of the pump. The operating conditions determined include: blocked fluid flow, no fluid in the line, no cassette associated with the pump, proper pump priming, or proper valve sealing.

Abstract: A manually operated pump having a pump assembly and a check valve. The pump assembly includes a dome with a fluid inlet. A support plate is sealed to the dome to define a fluid chamber. The support plate includes a fluid outlet. A foam material is positioned in the fluid chamber, the foam material expanding the dome to a rest state upon release of external pressure on the dome. The check valve has a valve inlet in fluid communication with the fluid outlet of the support plate. The check valve is positioned outside of the fluid chamber. The check valve has at least one exhaust channel to provide one way fluid flow from the fluid chamber through the exhaust channel.

Abstract: A hand operated flexible bulb for use with a liquid dipensing apparatus 5, the bulb comprises an open ended neck 2 which is securable in an air tight manner to a liquid dispensing apparatus. The flexible bulb is provided with an air inlet 6 separate from the open ended neck, the air inlet having a valve 7 associated therewith such that on application of hand pressure to the bulb, the valve closes to force air through the open ended neck and on release of pressure, the valve opens drawing air into the inlet.