Dispenser of fluid products

1. Dispenser of fluid product comprising a ring nut ( 2 ) able to be associated with a container of a fluid product and a dispensing head ( 7 ), substantially hollow and coaxially slidable relative to said ring nut ( 2 ); said dispensing head ( 7 ) comprising a closing chamber ( 13 ) positioned inside said dispensing head ( 7 ) and a dispensing nozzle ( 11 ) to allow the escape of said fluid product; wherein said dispensing head ( 7 ) further comprises a deformable membrane ( 14 ) fastened to said ring nut ( 2 ) and a top wall ( 9 ) facing said membrane ( 14 ) and defining said dosing chamber ( 13 ) in combination with said membrane ( 14 ); said top wall ( 9 ) being movable between a first position, distal from said ring nut ( 2 ), in which a volume of said dosing chamber ( 13 ) is greatest and said dosing chamber ( 13 ) is isolated and at least in part filled with said fluid product, and a second position, proximal to said ring nut ( 2 ), in which volume of said dosing chamber ( 13 ) is smallest; wherein said deformable membrane ( 14 ) comprises a plurality of radial stiffening ribs ( 29 ) positioned on a surface ( 14 b ) external to the dosing chamber ( 13 ) of said membrane ( 14 ) to favour the elastic return from a deformed configuration to a non deformed configuration of said membrane ( 14 ).

2. Dispenser as claimed in claim 1 , wherein said top wall ( 9 ) is movable from said first position to said second position to dispense said fluid product from said dosing chamber ( 13 ); said top wall ( 9 ) being movable from said second position to said first position to fill said dosing chamber ( 13 ).

3. Dispenser as claimed in claim 1 , wherein said membrane ( 14 ) presents an upper edge ( 27 ) in contact with said top wall ( 9 ) of said dispensing head ( 7 ) in said first position to isolate said dosing chamber ( 13 ); said upper edge ( 27 ) being moved away from said top wall ( 9 ) of said dispensing head ( 7 ) during a shift from said first position to said second position to allow fluid communication between said dosing chamber ( 13 ) and said dispensing nozzle ( 11 ).

4. Dispenser as claimed in claim 1 , wherein said membrane ( 14 ) comprises a peripheral band ( 21 ) connected to said dispensing head ( 7 ).

5. Dispenser as claimed in claim 1 , wherein said ring nut ( 2 ) comprises a sleeve ( 15 ) mounted coaxially thereto and defining a seat ( 16 ) for receiving a suction tube ( 17 ); said sleeve ( 15 ) presenting a hole to put said dosing chamber ( 13 ) in fluid communication with said suction tube ( 17 ).

6. Dispenser as claimed in claim 5 , wherein said membrane ( 14 ) comprises a tubular segment ( 20 ) fastened coaxially to said sleeve ( 15 ) to fasten said membrane ( 14 ) to said ring nut ( 2 ).

7. Dispenser as claimed in claim 6 , wherein said membrane ( 14 ) comprises a cylindrical portion ( 25 ) connected to said peripheral band ( 21 ) and a curved portion ( 26 ) connected to said cylindrical portion ( 25 ) at said upper edge ( 27 ).

8. Dispenser as claimed in claim 7 , wherein said membrane ( 14 ) further comprises a cone frustum shaped portion ( 28 ) positioned between said curved portion ( 26 ) and said sleeve ( 15 ).

9. Dispenser as claimed in claim 1 , further comprising an intake valve ( 39 ) obtained integrally with said membrane ( 14 ) to regulate passage of said fluid product from said container to said dosing chamber ( 13 ).

10. Dispenser as claimed in claim 9 , wherein said intake valve ( 39 ) comprises a shutter ( 40 ) able to be housed in a receiving area ( 41 ) obtained on said ring nut ( 2 ) and movable between a closed configuration, in which the shutter prevents transit of the fluid product through said container to said dosing chamber ( 13 ), and an open configuration in which the shuttle allows the transit of the fluid product from said container to said dosing chamber ( 13 ).

11. Dispenser as claimed in claim 1 , further comprising locking means ( 32 ) active on the dispensing head to prevent involuntary movements of said top wall ( 9 ).

12. Dispenser as claimed in claim 11 , wherein said locking means ( 32 ) comprise a plurality of protrusions ( 33 ) with circumference arc shape positioned between a cylindrical wall ( 3 ) of the ring nut ( 2 ) and a plurality of gaps ( 36 ) defined between two successive protrusions ( 33 ).

13. Dispenser as claimed in claim 12 , further comprising at least one pair of rectilinear ribs ( 31 ) positioned on an inner surface ( 8 a ) of a cylindrical wall ( 8 ) of said dispensing head ( 7 ); lower ends ( 31 a ) of said rectilinear ribs ( 31 ) lying in abutment on said protrusions ( 33 ) in a configuration of activation of the locking means ( 32 ); said lower ends ( 31 a ) of said rectilinear ribs ( 31 ) lying at said gaps ( 36 ) in a configuration of deactivation of the locking means ( 32 ).

14. Dispenser as claimed in claim 2 , wherein said membrane ( 14 ) presents an upper edge ( 27 ) in contact with said top wall ( 9 ) of said dispensing head ( 7 ) in said first position to isolate said dosing chamber ( 13 ); said upper edge ( 27 ) being moved away from said top wall ( 9 ) of said dispensing head ( 7 ) during a shift from said first position to said second position to allow fluid communication between said dosing chamber ( 13 ) and said dispensing nozzle ( 11 ).

15. Dispenser as claimed in claim 3 , wherein said membrane ( 14 ) comprises a cylindrical portion ( 25 ) connected to said peripheral band ( 21 ) and a curved portion ( 26 ) connected to said cylindrical portion ( 25 ) at said upper edge ( 27 ).

16. Dispenser of fluid product comprising a ring nut ( 2 ) able to be associated with a container of a fluid product and a dispensing head ( 7 ), substantially hollow and coaxially slidable relative to said ring nut ( 2 ); said dispensing head ( 7 ) comprising a closing chamber ( 13 ) positioned inside said dispensing head ( 7 ) and a dispensing nozzle ( 11 ) to allow escape of said fluid product; wherein said dispensing head ( 7 ) further comprises a deformable membrane ( 14 ) fastened to said ring nut ( 2 ) and a top wall ( 9 ) facing said membrane ( 14 ) and defining said dosing chamber ( 13 ) in combination with said membrane ( 14 ); said top wall ( 9 ) being movable between a first position, distal from said ring nut ( 2 ), in which a volume of said dosing chamber ( 13 ) is greatest and said dosing chamber ( 13 ) is isolated and at least in part filled with said fluid product, and a second position, proximal to said ring nut ( 2 ), in which the volume of said dosing chamber ( 13 ) is smallest; wherein further comprising an intake valve ( 39 ) obtained integrally with said membrane ( 14 ) to regulate passage of said fluid product from said container to said dosing chamber ( 13 ); wherein said intake valve ( 39 ) comprises a shutter ( 40 ) able to be housed in a receiving area ( 41 ) obtained on said ring nut ( 2 ) and movable between a closed configuration, in which the shutter prevents the transit of the fluid product through said container to said dosing chamber ( 13 ), and an open configuration in which the shuttle allows the transit of the fluid product from said container to said dosing chamber ( 13 ); wherein said intake valve ( 39 ) comprises a plurality of flexible appendages ( 42 ) to elastically connect said shutter ( 40 ) to said membrane ( 14 ) in order to allow said shutter ( 40 ) to shift from said open configuration to the closed configuration to move away from said hole ( 19 ) to allow the transit of said fluid in the dosing chamber ( 13 ).

17. Dispenser as claimed in claim 16 , wherein said elastic appendages ( 42 ) are “S” shaped.

18. Dispenser of fluid product comprising a ring nut ( 2 ) able to be associated with a container of a fluid product and a dispensing head ( 7 ), substantially hollow and coaxially slidable relative to said ring nut ( 2 ); said dispensing head ( 7 ) comprising a closing chamber ( 13 ) positioned inside said dispensing head ( 7 ) and a dispensing nozzle ( 11 ) to allow escape of said fluid product; wherein said dispensing head ( 7 ) further comprises a deformable membrane ( 14 ) fastened to said ring nut ( 2 ) and a top wall ( 9 ) facing said membrane ( 14 ) and defining said dosing chamber ( 13 ) in combination with said membrane ( 14 ); said top wall ( 9 ) being movable between a first position, distal from said ring nut ( 2 ), in which a volume of said dosing chamber ( 13 ) is greatest and said dosing chamber ( 13 ) is isolated and at least in part filled with said fluid product, and a second position, proximal to said ring nut ( 2 ), in which the volume of said dosing chamber ( 13 ) is smallest; wherein said ring nut ( 2 ) comprises a sleeve ( 15 ) mounted coaxially thereto and defining a seat ( 16 ) for receiving a suction tube ( 17 ); said sleeve ( 15 ) presenting a hole to put said dosing chamber ( 13 ) in fluid communication with said suction tube ( 17 ); wherein said ring nut ( 5 ) comprises a cladding ( 44 ) positioned externally and coaxially to said sleeve ( 15 ); said cladding ( 44 ) presenting at least one groove ( 46 ); said tubular segment ( 20 ) presenting at least one recess ( 47 ); said groove ( 46 ) and said recess ( 47 ) being able to face each other to define an air passage port to balance pressure acting within the container.

19. Dispenser as claimed in claim 18 , wherein said cladding ( 44 ) is rigidly connected to said sleeve ( 15 ) through a plurality of connecting teeth ( 52 ).