A fluid dispenser device comprising a pre-compression pump (6) and a dispenser head (T); the pump including an actuator rod (65) that is movable downwards and upwards, and a pre-compression spring (69) for increasing the pressure in a pump chamber (60);the head (T) including an inlet well (14) for c
A fluid dispenser device comprising a pre-compression pump (6) and a dispenser head (T); the pump including an actuator rod (65) that is movable downwards and upwards, and a pre-compression spring (69) for increasing the pressure in a pump chamber (60);the head (T) including an inlet well (14) for connecting to the actuator rod (65), and a nozzle (4) for forming a spray through a dispenser orifice (43), the nozzle being mounted in an assembly housing (2);the dispenser device being characterized in that:the pre-compression spring (69) presents stiffness that is less than about 3 N/mm, e.g. of about 1 N/mm to 3 N/mm; andat least two feed ducts (15), each connecting the inlet well (14) to the assembly housing (2).
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1. A fluid dispenser device comprising a pre-compression pump and a dispenser head; the pump including an actuator rod that is movable downwards and upwards, and a pre-compression spring for increasing the pressure in a pump chamber;the head including an inlet well for connecting to the actuator rod
1. A fluid dispenser device comprising a pre-compression pump and a dispenser head; the pump including an actuator rod that is movable downwards and upwards, and a pre-compression spring for increasing the pressure in a pump chamber;the head including an inlet well for connecting to the actuator rod, and a nozzle for forming a spray through a dispenser orifice, the nozzle being mounted along a first axis is X in an assembly housing; andwherein the pre-compression spring presents a stiffness that is less than about 3 N/mm; and the fluid dispenser device comprising at least two feed ducts, each communicating fluid from the inlet well to the assembly housing. 2. The dispenser device according to claim 1, wherein the pre-compression spring presents stiffness of about 2 N/mm. 3. The dispenser device according to claim 1, wherein the pump includes a return spring for returning the actuator rod to its rest position, and the actuation force for pressing the actuator rod down from its rest position, against the return and pre-compression springs, is substantially less than 2 kg. 4. The dispenser device according to claim 1, wherein each of the feed ducts presents a section lying in the range about 0.3 mm2 to 0.7 mm2. 5. The dispenser device according to claim 1, wherein a swirl system is provided upstream from the dispenser orifice, the system comprising at least two swirl channels that are connected in tangential manner to a swirl chamber that is centered on the spray orifice, each swirl channel being fed by a feed duct. 6. The dispenser device according to claim 1, wherein a pin extends in the assembly housing, the pin defining a side wall and a front wall, the nozzle presenting a cup shape comprising a substantially-cylindrical wall having an end that is closed by a dispenser wall that forms a spray orifice, the nozzle being assembled along an axis X in the assembly housing, with its cylindrical wall engaged around the pin, and its dispenser wall in axial abutment against the front wall of the pin, the cylindrical wall of the nozzle being in sealing contact with the side wall of the pin so as to define at least two connection sections, each connecting a feed duct to a swirl channel. 7. The dispenser device according to claim 6, wherein the front wall of the pin forms at least two swirl channels that are connected in tangential manner to a swirl chamber that is centered on the spray orifice. 8. The dispenser device according to claim 6, wherein the cylindrical wall of the nozzle is in sealing contact with the side wall of the pin at at least two sealing zones that extend in substantially axial manner from the ducts to the channels so as to form the two connection sections. 9. The dispenser device according to claim 8, wherein the sealing zones are formed by axial splines on the pin that are in contact with the cylindrical wall of the nozzle. 10. The dispenser device according to claim 1, wherein the inlet well extends along an axis Y that is transverse relative to the axis X, such that the feed ducts are connected over the height of the well, the heights of the two ducts in the well, along the axis Y, being identical. 11. The dispenser device according to claim 1, wherein flow paths of the fluid from the inlet well of the feed ducts to the spray orifice, via the feed ducts the connection sections and, the swirl channels are identical in length and the flow paths up to the swirl channels are symmetrical about the first axix X. 12. The dispenser head according to claim 1, wherein the housing and the cylindrical wall of the nozzle are circularly symmetrical around the axis X. 13. The dispenser head according to claim 3, wherein the actuation force for pressing the actuator rod down from the rest position, against the return and pre-compression springs, is equal to 1.5 kg±0.2 kg. 14. The dispenser device according to claim 1, wherein a first flow path and a second flow path of the fluid are formed from the inlet well of the feed ducts to the spray orifice, via the feed ducts, the connection sections, the swirl channels, and the swirl chamber, the first flow path and the second flow path have a same length,and the first flow path and the second flow path have a same shape and are disposed relative to each other about the first axis by a 180 degree rotation.
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이 특허에 인용된 특허 (4)
Hershey Donald E. ; Lund Mark T. ; Peffly Marjorie M., Concentrated reduced dosage spray pump delivery system.
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