Dispenser

1. A dispenser ( 1 ) for dispensing a liquid or viscous product, comprising a dispensing valve ( 2 ), in turn, comprising:

product sealing/releasing means ( 21 ), which in a first configuration prevents outflow of the product from the dispenser and in a second configuration enables outflow of the product from the dispenser;

elastic return means ( 22 ) for returning the sealing means ( 21 ) to the first configuration from the second configuration; the elastic return means ( 22 ) and at least part of the product sealing/releasing means ( 21 ) being integrated in a body ( 20 );

a casing ( 24 ) that encases at least one part of said body ( 20 );

a dispenser channel ( 23 ) for dispensing the product that extends between said body ( 20 ) and said casing ( 24 ); the elastic return means ( 22 ) comprising an annular concavity ( 220 ) positioned at one end of said dispenser channel ( 23 );

the dispenser ( 1 ) comprising:

a reservoir ( 3 ) that is in fluid communication with said valve ( 2 );

at least one opening ( 221 ) for passage of the product from said reservoir ( 3 ) to said dispenser channel ( 23 ); said opening ( 221 ) being open at all times so that it cannot be blocked by a component of the dispenser ( 1 );

the body ( 20 ) comprising:

a base ( 201 ) that defines anchorage to remaining parts of the dispenser ( 1 );

one end ( 202 ) that is opposite said base ( 201 );

a shank ( 203 ) that extends between the base ( 201 ) and said opposite end ( 202 ); the shank ( 203 ) having a cavity ( 204 ) in fluid communication with the reservoir ( 3 );

wherein the opening ( 221 ) comprises a groove ( 91 ) afforded in the casing ( 24 ).

2. The dispenser according to claim 1 , wherein said dispenser channel ( 23 ) has an annular passage section.

3. The dispenser according to claim 1 , wherein the sealing/releasing means ( 21 ) comprises:

a projection ( 211 ) that is part of said body ( 20 );

abutment means ( 212 ) for abutting against said projection ( 211 ), said abutment means ( 212 ) being afforded in said casing ( 24 ) and defines fluid dynamic sealing means of the product; in the first configuration of the sealing/releasing means ( 21 ), said projection ( 211 ) is in contact with the abutment means ( 212 ).

4. The dispenser according to claim 3 , wherein said projection ( 211 ) and said abutment means ( 212 ) extend annularly.

5. The dispenser according to claim 1 , wherein, in any position assumed by the body ( 20 ) in the second configuration, said body ( 20 ) remains inside the casing ( 24 ).

6. The dispenser according to claim 1 , wherein, in the first configuration of the sealing means ( 21 ), said reservoir ( 3 ) is sealed with respect to entry of microorganisms present in the external air.

7. The dispenser according to claim 6 , wherein the dispenser comprises pressure increasing means ( 4 ) for increasing the pressure in said reservoir ( 3 ), said pressure increasing means ( 4 ) being accessible to the user from the exterior of the reservoir ( 3 ); an increase in the pressure in the reservoir ( 3 ) determining passage of the sealing/releasing means ( 21 ) from the first to the second configuration; the pressure increasing means ( 4 ) comprising a collapsible wall that can be manually activated and that delimits the reservoir ( 3 ) at least partially.

8. The dispenser according to claim 6 , wherein, in the first configuration, the product sealing/releasing means ( 21 ) defines a barrier that slows down entry of external air in the reservoir ( 3 ).

9. The dispenser according to claim 1 , wherein said concavity ( 220 ) faces the sealing/releasing means ( 21 ).

10. The dispenser according to claim 9 , wherein, in the first configuration of the sealing means ( 21 ), said reservoir ( 3 ) is sealed with respect to entry of microorganisms present in the external air.

11. The dispenser according to claim 1 , wherein the dispenser comprises a container ( 9 ) for the product to be dispensed.

12. The dispenser according to claim 11 , wherein the casing ( 24 ) is partially inserted in the container ( 9 ); and the body ( 20 ) is not in contact with the container ( 9 ).

13. The dispenser according to claim 11 , wherein the container ( 9 ) is made of a plastic material.

14. The dispenser according to claim 1 , wherein the concavity ( 220 ) of the elastic return means ( 22 ) defines a Belleville spring.

15. The dispenser according to claim 1 , wherein the elastic return means ( 22 ) and at least part of the sealing means ( 21 ) are different parts of the body ( 20 ), said body being a single piece.

16. A dispenser ( 1 ) for dispensing a liquid or viscous product, comprising a dispensing valve ( 2 ), in turn, comprising:

product sealing/releasing means ( 21 ), which in a first configuration prevents outflow of the product from the dispenser and in a second configuration enables outflow of the product from the dispenser;

elastic return means ( 22 ) for returning the sealing means ( 21 ) to the first configuration from the second configuration; the elastic return means ( 22 ) and at least part of the product sealing/releasing means ( 21 ) being integrated in a same body ( 20 );

a casing ( 24 ) that encases at least one part of said body ( 20 );

a dispenser channel ( 23 ) for dispensing the product that extends between said body ( 20 ) and said casing ( 24 ); the elastic return means ( 22 ) comprising an annular concavity ( 220 ) positioned at one end of said dispenser channel ( 23 );

the dispenser ( 1 ) comprising:

a reservoir ( 3 ) that is in fluid communication with said valve ( 2 );

at least one opening ( 221 ) for passage of the product from said reservoir ( 3 ) to said dispenser channel ( 23 ); said opening ( 221 ) being open at all times so that it cannot be blocked by a component of the dispenser ( 1 );

a container ( 9 ) for the product to be dispensed;

the body ( 20 ) comprising:

a base ( 201 ) that defines anchorage to remaining parts of the dispenser ( 1 );

one end ( 202 ) that is opposite said base ( 201 );

a shank ( 203 ) that extends between the base ( 201 ) and said opposite end ( 202 ); the shank ( 203 ) having a cavity ( 204 ) in fluid communication with the reservoir ( 3 );

wherein the casing ( 24 ) is partially inserted in the container ( 9 ); and the body ( 20 ) is not in contact with the container ( 9 ).

17. The dispenser according to claim 16 , wherein the container ( 9 ) is made of a plastic material.