Dispenser of fluid products

1. Dispenser of fluid products comprising a ring nut ( 2 ) able to be associated to a container of a fluid product; a substantially hollow dispensing head ( 8 ) able to slide coaxially relative to said ring nut ( 2 ); said dispensing head ( 8 ) comprising a dosing chamber ( 14 ) obtained inside said dispensing head ( 8 ) and a dispensing nozzle ( 12 ) to allow the outflow of said fluid product; said dosing chamber ( 14 ) having a containment volume that can vary between a configuration of maximum volumetric capacity when said dosing chamber ( 14 ) is isolated and a configuration of minimum volumetric capacity; said dispenser being characterised in that it further comprises a deformable membrane ( 15 ) fastened to said ring nut ( 2 ) and a deformable disc-shaped body ( 16 ) fastened to said dispensing head ( 8 ) and defining said dosing chamber ( 14 ) in combination with said membrane ( 15 ); wherein said membrane ( 15 ) presents an upper edge ( 15 b ) in contact with a lateral edge ( 16 a ) of said disc-shaped body ( 16 ) when said dispensing head ( 8 ) is in said first position to isolate said dosing chamber ( 14 ); said upper edge ( 15 b ) being moved away from said lateral edge ( 16 a ) of said disc-shaped body ( 16 ) during a passage from said first position to said second position of said dispensing head ( 8 ) to allow fluid communication between said dosing chamber ( 14 ) and said dispensing nozzle ( 12 ).

2. Dispenser as claimed in claim 1 , characterised in that said dispensing head ( 8 ) is movable between a first position in which the disc-shaped body ( 16 ) is distal from said membrane ( 15 ) and said dosing chamber ( 14 ) assumes said configuration of maximum volumetric capacity and a second position in which the disc-shaped body ( 16 ) is proximal to said membrane ( 15 ) and said dosing chamber ( 14 ) assumes said configuration of minimum volumetric capacity.

3. Dispenser as claimed in claim 1 , characterised in that said membrane ( 15 ) comprises a tubular segment ( 19 ) for coupling with said ring nut ( 2 ); said tubular segment ( 19 ) defining a conduit ( 20 ) for the passage of said fluid from said container to said dosing chamber ( 14 ).

4. Dispenser as claimed in claim 3 , characterised in that it further comprises a closure element ( 29 ) that occludes said conduit ( 20 ) when said dosing chamber ( 14 ) is in said configuration of maximum volumetric capacity to prevent the transit of said fluid.

5. Dispenser as claimed in claim 4 , characterised in that said dispensing head ( 8 ) comprises a pivot pin ( 27 ) developing in said dosing chamber ( 14 ), said pivot pin ( 27 ) comprising a diverging body ( 28 ) positioned at its distal end ( 27 b ) from the dispensing head ( 8 ) to define said closure element ( 29 ).

6. Dispenser as claimed in claim 4 , characterised in that said tubular segment ( 19 ) comprises a ring ( 30 ) that is coaxial and internal to said tubular segment ( 19 ), said ring ( 30 ) being able to come in contact with said closure element ( 29 ) to achieve the closure of said conduit ( 20 ).

7. Dispenser as claimed in claim 5 , characterised in that said disc-shaped body ( 16 ) is connected to said pivot pin ( 27 ) at its proximal end ( 27 a ) to said dispensing head ( 8 ).

8. Dispenser as claimed in claim 1 , characterised in that said disc-shaped body ( 16 ) comprises a cone frustum shaped central portion ( 16 b ) having a predetermined angle of aperture and a peripheral portion ( 16 c ) with curved section having convexity oriented towards said dosing chamber ( 14 ).

9. Dispenser as claimed in claim 1 , characterised in that said membrane ( 15 ) comprises a peripheral band ( 21 ) extending from said upper edge ( 15 b ) and integrally associated to said dispensing head ( 8 ).

10. Dispenser as claimed in claim 1 , characterised in that it further comprises a sleeve ( 32 ) rigidly fastened to said ring nut ( 2 ), said sleeve ( 32 ) being able to support a suction tube ( 33 ), and an inflow valve ( 34 ) able to regulate the transit of said fluid into said dosing chamber ( 14 ).

11. Dispenser as claimed in claim 10 , characterised in that said inflow valve ( 34 ) comprises a ball ( 35 ) able to be housed in a housing seat ( 36 ) defined at least in part by a cone frustum shaped portion ( 32 a ) of said sleeve ( 32 ).

12. Dispenser as claimed in claim 11 , characterised in that it comprises a stop ( 37 ) positioned within a tubular segment ( 19 ) of said deformable membrane ( 15 ) at said housing seat ( 36 ) to limit the travel of said ball ( 35 ).

13. Dispenser as claimed in claim 12 , characterised in that said stop ( 37 ) comprises an extension ( 38 ) obtained in a single piece with said ring ( 30 ).

14. Dispenser as claimed in claim 1 , characterised in that it further comprises locking means ( 39 ) active on the dispensing head ( 8 ) to prevent involuntary movements of said dispensing head ( 8 ).

15. Dispenser as claimed in claim 14 , characterised in that said locking means ( 39 ) comprise a plurality of circumference arc protrusions ( 40 ) positioned on a cylindrical wall ( 3 ) of the ring nut ( 2 ) and a plurality of openings ( 43 ) defined between two successive protrusions ( 40 ).

16. Dispenser as claimed in claim 15 , characterised in that it further comprises at least one pair of rectilinear ribs ( 26 ) positioned on an inner surface ( 9 a ) of a cylindrical wall ( 9 ) of said dispensing head ( 8 ); lower ends ( 26 a ) of said ribs ( 26 ) abutting on said protrusions ( 40 ) in a configuration of activation of the locking means ( 39 ); said lower ends ( 26 a ) of said ribs ( 26 ) lying at said openings ( 43 ) in a configuration of deactivation of the locking means ( 39 ).

17. Dispenser as claimed in claim 1 , characterised in that it further comprises compensating means ( 46 ) to maintain the pressure within the container constant and equal to atmospheric pressure following a dispensation of the fluid.

18. Dispenser as claimed in claim 17 , characterised in that said compensating means ( 46 ) comprise at least one longitudinal recess ( 47 ) obtained on an inner surface ( 17 b ) of a cylindrical segment ( 17 ) of said ring nut ( 2 ) and at least one corresponding longitudinal groove ( 48 ) obtained on an outer surface ( 19 b ) of a tubular segment ( 19 ) of the membrane ( 15 ), said groove ( 48 ) being able to face said recess ( 47 ) to allow a fluid communication between said container and an outside environment.