Abstract: A fluid dispenser comprising a pump (10) having no air intake and mounted in sealed manner on a deformable tank (20), and an outer envelope (30) that surrounds the deformable tank (20) and that retains a shape suitable for being held in the hand throughout the time that the dispenser is in use, the outer envelope (30) defining an inner volume that communicates with the atmosphere via at least one air passage (34, 35, 36), the deformable tank being a flexible tube (20) that extends between a first end (20a) that is closed by pinching to form a bottom (33, 33b) and a second end (20b) that is secured to the pump (10), characterized in that the outer envelope is a flexible tube extending between a first end (30a) close to the bottom (33, 33b) of the tank, and a second end (30b) in mechanical connection with the second end of the deformable tank (20), the first end (30a) of the outer envelope being closed by pinching.

Abstract: A fluid substance dispenser includes a pump mounted on a stopper 20 designed to be fixed on a neck of a receptacle. The pump includes a body 1, a piston 2 that slides axially inside the pump body, a return spring 10 that urges the piston towards the open end of the body, and a single piece ferrule 11 fixed in the open end of the pump body to limit motion of the piston towards the second end. The ferrule has a flange 11a which extends radially outwards, and is engaged as a force-fit inside an internal passage 28 of the stopper to hold the pump in the stopper, preventing the pump body from moving towards the outside of the receptacle. The ferrule is made of a harder plastics material than the stopper so that the radial flange bites into the stopper.

Abstract: A device for spraying or dispensing a fluid and adapted to be mounted on a fluid tank 30 includes a body 1, an actuator member 3 slidably mounted relative to the body, an inlet passage 14 communicating with the tank and enabling the fluid to enter into the body, and an elongate member 5, 25 slidably mounted in the inlet passage and penetrating into the tank. The elongate member is displaceable together with the actuator member towards the tank on the first occasion that the actuator member is actuated, and the elongate member exerts mechanical action on an element 33, 42 secured to the tank when it is displaced, and in such a manner as to puncture or dislodge the element.

Abstract: A manual precompression pump for spraying or dispensing a fluid substance contained in a receptacle, said pump having a pump body (1) in which a hollow piston (2) slides the piston being extended by a hollow rod (3) including the seat (7a) for a closure valve member (6) urged towards said hollow rod by a spring (10), said spring pushing the valve member (6) and the piston (2) towards a rest position, said pump including a pump chamber (12) which is in communication with the receptacle when the valve member and the piston are in their rest positions, said pump chamber (12) being capable of being isolated from the receptacle by sealed interfitting of a first cylinder (8) integral with the valve member (6) and of a second cylinder (4) integral with the pump body, said pump being characterized in that a valve rod (7b) extends the valve member (6) through the hollow rod (3) to a distance H1 beyond the outside end of the hollow rod, and in that starting from the rest position of the valve member, the cylinder (8) i

Abstract: A pushbutton for actuating a device for dispensing or spraying a fluid substance includes a hollow body 1 having an outlet end 2 in which an outlet orifice 3 is formed, the outlet end including an inside surface 2a which is not perpendicular to the axis 1a of the body. An adjustment member 10 is rotatably received in the body of the pushbutton, and includes a shutter 19 provided with a front surface 19a that is complementary in shape to the inside surface of the outlet end. The shutter is urged towards the outlet end by a resilient tongue 18. The rotation of the adjustment member and shutter varies the outlet flow rate from the pushbutton.

Abstract: A device for dispensing of small volume comprises a pump associated with a container of the substance to be dispensed, the pump comprising: a hollow pump body; and a piston sliding inside said pump body in sealing contact with the pump body around a circular periphery of diameter D2; wherein the pump further includes: a push rod including a central channel in which a valve seat is formed, the push rod sliding in contact with the pump body around a circular periphery of diameter D1 less than D2; a punch secured to the piston and capable of bearing in sealed manner against the valve seat; and resilient means urging the piston against the valve seat.

Abstract: A hollow elongate pushbutton receives a nozzle rod 2, and is mounted at a mid-portion on the valve rod of a liquid spray pump intended to operate under pressures on the order of more than 100 bars, and at a repetition rate of 50 Hz or more. The center of gravity of the pushbutton and nozzle rod assembly lies on the axis of the valve rod, to avoid vibrations during use.

Abstract: A prior art precompression metering pump which incorporates a differential piston forming part of the pump chamber inlet valve and its outlet valve is difficult to prime, especially in the case of metering paste products. In the improved pump there is disposed between the differential piston and the main piston of the pump a collar consisting of a ring from which project substantially axial tongues which are slightly inwardly inclined and each provided with a head. The collar moves inside the pump body so that normal operation proceeds as if it were not present. To prime the pump, however, the user depresses the collar until it contacts a step on the pump body. The tongues then bend so that their heads, interposed between the two pistons, move the latter apart (by a wedging effect or by a lever arm effect, or by a combination of the two). This is followed by mechanical opening of the pump chamber outlet valve whereby the air initially contained in the pump chamber escapes to the exterior.

Abstract: The present dispenser device is designed in particular for eye treatment and comprises a pump body including a pump chamber, a piston slidable within the chamber and extended beyond the chamber by a rod pierced by a channel capable of communicating with the chamber, and an endpiece fixed to the rod and having a dispensing orifice in line with the channel of the rod. In addition to the above conventional items, the dispenser has a chamber admission valve which is constituted by co-operation between the enclosure defining the pump chamber and the piston which engages therein or projects therefrom as the case may be. The co-operation is preferably via a sealing lip. This disposition makes it possible to dispense a drop whose volume as determined by the capacity of the chamber is very small. In addition, the piston is returned to its rest position with the admission valve closed by resilient means disposed between the pump body and the endpiece. This guarantees that only drop is dispensed at a time.

Abstract: A precompression metering pump of the prior art which is otherwise particularly advantageous, is nevertheless difficult to prime because of the high degree of compressibility of the air it initially contains in its pump chamber. The present invention improves this aspect of metering pump operations. It consists in providing additional resilient means (20) and at least one cylindrical part (10) level with the conventional outlet non-return valve of the pump and constituting a second outlet non-return valve. In a particular embodiment, the resilient means and the cylindrical part are received one above the other in the outlet channel (33) of the pump actuator rod (31). To do this, they bear respectively against a choking step (32) in the form of a lug and a shoulder (34) presented by said channel. In normal operation, the differential piston (4) of the pump moves out of the way so that operation takes place as in a prior art precompression metering pump.

Abstract: An atomizer comprises a cylinder defining a pump chamber and containing a piston. The chamber communicates with an atomizer nozzle by a valve comprising a valve member which is opened at a predetermined liquid pressure during operation of the piston to pressurize the liquid in the pump chamber. Liquid is fed into the pump chamber through a conduit which projects upwardly into the cylinder. A sleeve rigid with the valve member or the piston engages the conduit during operation of the piston to prevent communication between the conduit and the pump chamber.

Abstract: A pump primarily intended for incorporation in a dip-tube sprayer includes a hollow piston slidable in a cylinder which communicates with an outlet tube. The piston defines a seat for a valve which in the inoperative condition prevents communication between the cylinder and the outlet or delivery tube. The piston has the form of a shallow cup and is not totally covered by the valve when seated. One or more bleeds are provided in the part of the piston covered by the valve.

Abstract: An atomiser having a tapered pump chamber in which a valved lipped piston is slidably mounted, the piston being compressed radially inwardly by the tapered pump chamber to ensure a tight seal between the valve and its valve seat.