Abstract: A fluid dispenser pump actuated manually to dispense a metered quantity or “dose” of fluid each time it is actuated. The pump has a pump body containing a pump chamber and a return spring resiliently urging the pump towards its rest position and returning it automatically to the rest position after each actuation. The pump chamber has an outlet value that is urged towards a closed position by the pressure from the fluid while the pump is being actuated, and is opened mechanically by a valve control element at the end of actuation. Once the full dose has been prepared, the outlet valve is kept in the open position while the fluid is expelled from the pump chamber. This prevents the flow of fluid from closing the outlet valve again before the full dose of fluid has been expelled.

Abstract: A fluid dispenser device comprising a pump (50) and a dispensing head that comprises a body (1) defining a fluid discharge channel (2) ending in a dispensing orifice (3), a rigid insert (4) being disposed in said discharge channel (2), said rigid insert forming or being secured to the outlet valve of said pump, said fluid dispenser device being characterized in that said dispensing head further comprises a closure element (10) disposed in said discharge channel (2), said closure element (10) being mounted to move and/or to deform between a closure position in which it closes off the discharge channel (2) and a non-closure position in which it does not close off the discharge channel (2), said rigid insert (4) being mounted to move inside said discharge channel (2) between a rest position and an actuating position, said closure element (10) cooperating at one end with said rigid insert (4) and at the other end with said body (1) so that, when the insert (4) is in the rest position, the closure element (10) is

Abstract: A delivery device for patient-controlled infusion of a medicament (6), the delivery device comprising a reservoir (2) for the medicament (6) and a pump (4) having a predetermined delivery dose which is capable of displacing the medicament from the reservoir (2) and delivering it to a patient, wherein the pump (4) comprises a pumping means (14), a first conduit (10), capable of restricting flow rate, chosen in conjunction with the delivery dose of the pumping means (14) to define a predetermined maximum dosage rate, said conduit (10) connecting the reservoir (2) to a pumping means (14), a one-way valve (18) in fluid communication with the first conduit (10) and the pumping means (14) which permits medicament flow into the pumping means (14) but prevents reverse flow, a controlling means (32), and a second conduit (28) extending from the pumping means and having a distal end (30) through which, the medicament may be released, wherein the controlling means (32), (a) is in fluid communication with the pumping mea

Abstract: The invention herein relates to an improved switch valve structure for liquid sprayer comprises of a press body, a casing, a cylinder body, a piston body and a spring, wherein the piston body consists of a piston rod and a piston; a seal ring is disposed in the interior portion of the piston to be functioned together with the holes on the piston rod; a seal ring is also disposed on the outer edge of the piston to be worked with the cylinder body for inducing the liquid; the upper hollow portion of the cylinder body functions synchronously with the seal ring on the outer edge of the piston, while the projecting ring inside the lower portion of the cylinder functions synchronously with the solid body of the lower portion of the piston rod and the spring coiled around the lower solid portion of the piston rod.

Abstract: A hand-operated pump for fluid distribution comprising a pump body defining a pump chamber, a hollow control rod traveling in the pump body between a rest position and a depressed, lower position, a free floating piston assembled in a sliding manner on the control rod, the piston and the rod serving to define an outlet valve, characterized in that the outlet valve exhibits a cylindrical tight sealing contact adapted to open by sliding the piston towards the top on the rod at a determined height and the rod includes a surface engaged by the piston and widening in a vertical direction towards the top.

Abstract: A fluid dispenser device has a fluid reservoir (10) and a dispensing member (20), such as a pump, actuated by an actuating rod (5) that is connected to a dispenser head (30) to dispense fluid selectively. The dispensing member is fixed to the reservoir by a fixing element (40), the dispenser device being provided with an air vent (50) situated outside the reservoir and outside the fixing element, an air filter element (60, 75) being disposed in the vicinity of the air vent, outside the fixing element, and the filter element being held on or in the vicinity of the air vent by an outer member (70) fixed to the fixing element and/or to the reservoir. The outer member has a fixing portion (71) which is fixed to the fixing element of the dispenser device, and a flexible membrane portion connected in leaktight manner to the actuating rod and/or to a piece (35) of the dispenser head.

Abstract: The invention herein relates to an improved switch valve structure for liquid sprayer comprises of a press body, a casing, a cylinder body, a piston body and a spring, wherein the piston body consists of a piston rod and a piston; a seal ring is disposed in the interior portion of the piston to be functioned together with the holes on the piston rod; a seal ring is also disposed on the outer edge of the piston to be worked with the cylinder body for inducing the liquid; the upper hollow portion of the cylinder body functions synchronously with the seal ring on the outer edge of the piston, while the projecting ring inside the lower portion of the cylinder functions synchronously with the solid body of the lower portion of the piston rod and the spring coiled around the lower solid portion of the piston rod.

Abstract: A dispenser includes a nozzle body (3) which is mounted to an actuating head (2) parallel to a center axis (10) of the dispenser. Within the head (2) the despenser includes an air pump (33) which ports into the nozzle body (3) additionally to ducts for the liquid medium. Head (2) may be preassembled with the associated pump piston (41) to provide a unit which is axially mounted on a thrust piston pump (32) for the liquid medium. Thereby piston (41) snaps into a flanged rim (42) of a crimp ring (39) which thus positively connects piston (41) to the pump base.

Abstract: A pump for fixing onto a receptacle to dispense a substance contained therein. The pump has a pump body that includes at least one air intake vent. A pushbutton is movable relative to the pump body between a low position and a high position. A suction valve includes a shutter-forming member. A piston co-operates with the pump body to define a pump chamber of variable volume. Also, a dispenser duct is provided through which the pump chamber can communicate with a dispenser orifice. A sealing skirt surrounds the dispenser duct on at least a fraction of the height of the dispenser duct. The sealing skirt is configured to co-operate with the pump body when the pushbutton is in its low position so as to isolate the vent from an outside ambient environment. As examples of a few aspects, the dispenser duct is provided as an element attached to the pushbutton and the piston is movable relative to the dispenser duct.

Abstract: A dispenser for transferring a liquid from a container includes a dispenser body having a first end, a second end and an inner surface. The first end has an aperture through which the body is capable of receiving at least a portion of the liquid. A valve stem is slidably disposed within the dispenser body in engagement with the inner surface proximate to the first end for movement between a first position and a second position. The valve stem and the dispenser body are configured to limit the motion of the valve stem between the first and second positions to linear motion. The dispenser may include at least one thread disposed on a generally outwardly facing surface of a dispenser body capable of releasably threadably engaging the nozzle when the nozzle is in the closed position.

Abstract: A fluid dispenser device comprising: a fluid pump (1) comprising: a pump body (10) provided with an inlet valve member (12); an actuating rod (2) mounted to move axially in the body (10); and a free piston (3) mounted to slide in leaktight manner in the body (10), the piston (3) being mounted to move over the actuating rod (2) to form an outlet valve member (332) therewith; and an air pump comprising an air chamber (54) provided with an inlet valve member (515), with an outlet valve member (331), and with a piston (48) for compressing the air in the chamber; the fluid dispenser device being characterized in that the outlet valve (332) of the fluid pump and the outlet valve (331) of the air pump open out into a common duct (23).

Abstract: The invention relates to a pump for fitting to a receptacle, the pump comprising a pump body and a moving assembly movable relative to the body, having a piston that bears in leakproof manner against the body and that co-operates therewith to define a pump chamber of variable volume. The pump also has, outside the pump chamber, an elastically deformable membrane arranged to return the moving assembly into its initial position after delivering a quantity of substance.

Abstract: The invention relates to a pump for fitting to a receptacle, the pump comprising a pump body and a moving assembly movable relative to the body, having a piston that bears in leakproof manner against the body and that co-operates therewith to define a pump chamber of variable volume. The pump also has, outside the pump chamber, an elastically deformable membrane arranged to return the moving assembly into its initial position after delivering a quantity of substance.

Abstract: A fluid-dispensing member comprising: a body defining a chamber; an actuating rod provided with a pusher; a piston mounted on the actuating rod to slide in leaktight manner in the chamber; an inlet valve; and an outlet valve; wherein the outlet valve comprises a differential piston that can be moved under the action of the pressure exerted on the fluid by the piston against the action of a spring which abuts at one end against the differential piston, and at its other end against the pusher.

Abstract: An improved sealing valve structure for liquid sprayers, in particular an improvement directed to an enclosed space formed in an interior of a valve of a manually operable sprayer or atomizer, essentially an improvement of the structure of a tightening valve and a movable valve, includes a tightening valve disposed below a compression chamber and capable of interaction with a movable valve, the tightening valve being integrally formed with a cylinder so that they are concentric and have enhanced durability to prevent loosening and failure of the tightening valve due to prolonged subjection to the action of the movable valve. An edge of an inner periphery of the tightening valve is provided with a projecting annular tightening end that achieves good tightness and smoothness during interaction with the movable valve so as to enhance their mutual tightness, stability and smoothness.

Abstract: A hand-operated pump for fluid distribution comprising a pump body defining a pump chamber, a hollow control rod traveling in the pump body between a rest position and a depressed, lower position, a free floating piston assembled in a sliding manner on the control rod, the piston and the rod serving to define an outlet valve, characterized in that the outlet valve exhibits a cylindrical tight sealing contact adapted to open by sliding the piston towards the top on the rod at a determined height and the rod includes a surface engaged by the piston and widening in a vertical direction towards the top.

Abstract: A pump of type comprising a moving member mounted to move relative to a support, the moving member having a central duct into which the substance to be dispensed penetrates via at least one opening, the support co-operating with the moving member to define a variable volume pump chamber around said central duct, the pump also having a diaphragm having a central portion in which said central duct is inserted, the diaphragm being organized in such a manner as to isolate the pump chamber from the opening(s) of the central duct when the volume of the pump chamber increases and the substance is sucked into it. At least one of the central duct and the central portion of the diaphragm includes an annular bulge that is suitable, when the volume of the pump chamber increases, for bearing in leakproof manner on the other of the central portion and the central duct of the diaphragm, so as to isolate the pump chamber from the opening(s) of the central duct.

Abstract: A pump for manually dispensing liquids under pressure, including a cup-shaped body, and a stem a piston portion of which defines a compression chamber closed at one end by a valve formed from a ball movable on a seat in a hollow appendix in the interior of a body, and closed at the other end by a valving element movable within a stem bore and having a conical part which can seal against a conical seat in the stem, the pump having a width greater than and a length less than known pumps of equal delivery capacity.

Abstract: A discharge apparatus for media with a medium reservoir and a discharge opening for the medium is at least partly made from a plastic containing at least one substance active against microorganisms. This substance can be an antibiotic, e.g. an antibiotic with bactericidal action from the penicillin group. It is appropriate for the parts of the discharge apparatus coming into contact with the medium to be made from the plastic with additive. Preferably the discharge apparatus is substantially completely made from the plastic with additive. The discharge apparatus according to the invention is preferably used for dosing, feeding, atomizing and/or dispensing pharmaceuticals or cosmetics.

Abstract: An inlet valve (10) of a dispenser (1) or thrust piston pump, for highly reliable and speedy valve function in all vertical or inclined positions of the dispenser (1) includes, nearer to the pump chamber (20), a valve ball (35) operating in response to pressure and, further away from the pump chamber (20), a valve ball (36) subject to the force of gravity. Ball (36) pushes ball (35) out of its seat (33) in the event that it is firmly seated in the seat (33) due to a vacuum in the reservoir (9) when the dispenser (1) is turned upside down. The seats (33, 34) for the two valve balls (35, 36) are formed by a radially deformable wall (54), which can be tightly and sealingly supported against balls (35, 36).

Abstract: An anti-clog pump sprayer has a cover mounted for independent reciprocation on a plunger head, the cover having a cupped spring biased portion covering the discharge orifice on the head to avoid clogging on product drying, and being lifted off the orifice during the relative shift for uncovering the orifice in readiness for spraying. The sprayer may also have a product retraction device on the plunger head in communication with the discharge orifice, a projection on the underside of the cover top wall for actuating the device at the commencement of the plunger return stroke for creating a slight sub-atmospheric pressure for suctioning any residual product inwardly of the orifice to thereby avoid clogging.

Abstract: Dispensing assembly for dispensing two liquid components, comprising an outer piston pump concentric with an inner piston pump provided with resetting means, in which the inlet and outlet of the piston chambers comprise pre-tensioned non-return valves, in which the inner piston has a small free stroke relative to the other parts of the assembly, a stationary stroke limiting part with a stop is present in the outer piston chamber of the outer piston pump, which stroke limiting part under friction can interact with a stop on the inner piston, in order to limit the movement distance thereof and permit the movement thereof only under friction, and the outer piston and the inner piston comprise carrier bevelled collars which can interact in a sealing manner with each other and form an active non-return valve for the outlet of the outer piston chamber.

Abstract: A hand-operated pump for fluid distribution comprising a pump body defining a pump chamber, a hollow control rod traveling in the pump body between a rest position and a depressed, lower position, a free floating piston assembled in a sliding manner on the control rod, the piston and the rod serving to define an outlet valve, characterized in that the outlet valve exhibits a cylindrical tight sealing contact adapted to open by sliding the piston towards the top on the rod at a determined height and the rod includes a surface engaged by the piston and widening in a vertical direction towards the top.

Abstract: A manually operated spray device for spraying a liquid in a vessel comprises a cylinder member which includes an upper air cylinder and a lower liquid cylinder, an air piston slidably fitted in the air cylinder, and a suction pipe connected to the liquid cylinder within the vessel toward the bottom thereof. An actuator member is urged upwards and vertically movable relative to the cylinder member; and includes a hollow stem protruding upwards from the liquid cylinder and fitted at its center portion with the air piston, a press head fitted onto the upper portion of the stem, a nozzle hole opening at the side surface of the press head, and first and second passages merging with each other on the upstream side of the nozzle hole. The first passage is communicated with the air chamber on one side of the air piston, and the second passage is communicated with the liquid cylinder through the interior of the stem.

Abstract: The invention relates to a pump of the type including a moving member mounted to move relative to a support, the moving member having a central duct in which substance to be dispensed penetrates via at least one opening, the support co-operating with the moving member to define, around said central duct, a pump chamber of variable volume, said pump also having a membrane with a central portion in the form of a sleeve that is open at its top end and closed at its bottom end, said central duct being inserted in said central portion, the membrane being organized to isolate the pump chamber from the opening(s) of said central duct while the volume of the pump chamber is increasing and substance is being sucked into it. At least one of the membrane and the central duct is shaped to prevent a leakproof annular zone forming between the membrane and the central duct which would prevent the substance contained in the pump chamber from flowing via said central duct while the volume of the pump chamber is decreasing.

Abstract: A finger operated pump assembly comprising a pump body having a base supporting an outer housing and an inner housing and defining a first portion of a compression chamber therebetween. A piston is at least partially received within the pump body and is slidable relative to the pump body along an inner surface of the outer housing. The piston has an annular lip for providing a sealing engagement with the pump body, and the piston is provided with a piston outlet defined by a poppet valve seat. A poppet is accommodated by the inner housing and the poppet is biased away from the base into engagement with the poppet valve seat by a spring to normally close the piston outlet. The poppet, the base and the inner housing all define an interior cavity. A peripheral passageway communicates with the compression chamber, and the passageway includes a one-way valve which allows the product to flow along the passageway toward the compression chamber.

Abstract: The invention relates to a precompression pump which includes a feature for opening the outlet valve at the bottom of the pump stroke, to thereby evacuate air and liquid from the pump chamber. The pump includes a gravity-biased inlet valve and a spring-biased outlet valve. Elevated pressure in the pump chamber causes the outlet valve to open against the bias of the outlet valve spring. At least one of the outlet valve or the inlet valve has an engagement end which engages the other valve at the bottom of the pump stroke, to thereby open the outlet valve against the bias of the outlet valve spring and exhaust air and liquid from the pump chamber to the spray nozzle. In this way, the pump chamber is evacuated so that liquid can be drawn into the pump chamber from the bottle or container. The present invention uses a simple design which is easy to mold, does not require close tolerancing, and which operates effectively without the need for difficult-to-mold friction fits.