초록 ▼

A pump for fixing on a receptacle includes: a stationary portion including a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a variable-volume pump chamber; an opening in the pump body that enables the pump chamber to communicate with the inside of

A pump for fixing on a receptacle includes: a stationary portion including a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a variable-volume pump chamber; an opening in the pump body that enables the pump chamber to communicate with the inside of the receptacle and enables the pump to operate in a head-down position; an air intake passage, distinct from the opening, between the stationary portion and the moving assembly; a first lip configured to press in a leaktight manner against the pump body and to prevent communication via the opening between the inside of the receptacle and the pump chamber; and a second lip arranged, at least when the moving assembly is in an end-of-stroke position, to prevent communication through the inside of the pump body and via the opening between the inside of the receptacle and the outside.

대표청구항 ▼

What is claimed is: 1. A pump for fixing on a receptacle, the pump comprising: a stationary portion comprising a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a pump chamber of variable volume; at least one opening in the pump body that enables

What is claimed is: 1. A pump for fixing on a receptacle, the pump comprising: a stationary portion comprising a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a pump chamber of variable volume; at least one opening in the pump body that enables the pump chamber to communicate with an inside of the receptacle and is configured to enable the pump to operate in a head-down position; an air intake passage between the stationary portion and the moving assembly, said intake passage being distinct from said at least one opening; a first lip configured, after displacement of the moving assembly from a rest position in a substance-dispensing direction, to press in a leaktight manner against the pump body and to prevent communication via said at least one opening between the inside of the receptacle and the pump chamber; a second lip situated above the first lip, when the pump is observed in a head-up position, said second lip being configured, at least when the moving assembly is in an end-of-stroke position inside the pump body, to press in a leaktight manner against the pump body and to prevent communication via the inside of the pump body and said at least one opening between the inside of the receptacle and the outside; and an annular gasket for interposing between the stationary portion and a top end of a neck of the receptacle on which the pump is to be mounted, said annular gasket enabling ingress of air from outside toward the inside of the receptacle, while preventing a substance contained in the receptacle from flowing to said outside. 2. A pump according to claim 1, said annular gasket comprising a radially-inner portion pressing against the pump body to prevent the substance contained in the receptacle from flowing to said outside, and being suitable for moving away therefrom under an effect of suction to enable ingress of said air from the outside toward the inside of the receptacle. 3. A pump according to claim 1, further comprising a base portion that enables the pump to be fixed on a receptacle, the pump body being fixed on said base portion. 4. A pump according to claim 3, wherein the air intake passage is formed at least in part between the base portion and the pump body. 5. A pump according to claim 1, wherein at least one of the first lip and the second lip is configured to press permanently against the pump body. 6. A pump according to claim 1, wherein the first lip has a substantially frustocoincal shape diverging toward the pump chamber. 7. A pump according to claim 1, wherein the second lip has an arcuate shape that is concave toward an inside surface of the pump body, pressing via bottom and top edges against the pump body. 8. A pump according to claim 1, wherein the moving assembly comprises an outlet passage for the substance and a shutter configured to close said outlet passage while the volume of the pump chamber is increasing and to open said outlet passage while the volume of the pump chamber is decreasing, and once a pressure of said substance inside the pump chamber has reached a predetermined value. 9. A pump according to claim 8, wherein the moving assembly has an inside space into which the substance outlet passage opens, the shutter being disposed in the inside space. 10. A pump according to claim 8, wherein the shutter comprises a tubular body closed at a top end thereof by a substantially frustoconical portion suitable for closing the substance outlet passage. 11. A pump according to claim 10, wherein the shutter further comprises an annular lip outside the tubular body and suitable for pressing against a wall defining the inside space, said annular lip having, when the pump is observed in a head-up position, a shape that is substantially frustoconical, diverging upward and situated beneath the passage(s) putting the inside space into communication with the pump chamber. 12. A pump according to claim 9, wherein the shutter is urged into a closed position by a resilient return element disposed in the inside space. 13. A pump according to claim 1, comprising a resilient return element suitable for returning the moving assembly into a rest position. 14. A pump according to claim 13, wherein the resilient return element is disposed in the pump chamber. 15. A pump according to claim 1, wherein the pump body is configured to enable a dip tube to be fixed thereto. 16. A pump according to claim 15, further comprising a suction check valve that closes while the volume of the pump chamber is decreasing and that opens while the volume of the pump chamber is increasing, wherein said check valve is configured to enable the pump chamber to be fed with said substance via the dip tube when the pump is used in a head-up position. 17. A pump according to claim 3, wherein the pump body is fixed on said base portion by snap-fastening. 18. A pump according to claim 5, wherein both the first lip and the second lip press permanently against the pump body. 19. A pump according to claim 12, wherein said resilient return element comprises a spring working in compression. 20. A receptacle fitted with a pump according to claim 1. 21. A pump according to claim 19, wherein said spring comprises a helical spring. 22. A pump according to claim 1, said gasket being configured so as to leave a clearance between the gasket and the pump body that is sufficiently small to prevent the substance from passing, while still allowing said air to pass. 23. A pump for fixing on a receptacle, the pump comprising: a stationary portion comprising a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a pump chamber of variable volume; at least one opening in the pump body that enables the pump chamber to communicate with an inside of the receptacle and is configured to enable the pump to operate in a head-down position; an air intake passage between the stationary portion and the moving assembly, said intake passage being distinct from said at least one opening; a first lip configured, after displacement of the moving assembly from a rest position in a substance-dispensing direction, to press in a leaktight manner against the pump body and to prevent communication via said at least one opening between the inside of the receptacle and the pump chamber; and a second lip situated above the first lip, when the pump is observed in a head-up position, said second lip being configured, at least when the moving assembly is in an end-of-stroke position inside the pump body, to press in a leaktight manner against the pump body and to prevent communication via the inside of the pump body and said at least one opening between the inside of the receptacle and the outside, wherein the moving assembly comprises an outlet passage for the substance and a shutter configured to close said passage while the volume of the pump chamber is increasing and to open said outlet passage while the volume of the pump chamber is decreasing, and once the pressure of a substance inside the pump chamber has reached a predefined value, wherein the shutter comprises a tubular body closed at a top end thereof by a substantially frustoconical portion suitable for closing the substance outlet passage, the shutter further comprising an annular lip outside the tubular body and suitable for pressing against a wall defining the inside space, said annular lip having, when the pump is observed in a head-up position, a shape that is substantially frustoconical, diverging upward and situated beneath the passage(s) putting the inside space into communication with the pump chamber. 24. A pump for fixing on a receptacle, the pump comprising: a stationary portion including a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a pump chamber of variable volume; at least one opening in the pump body enabling the pump chamber to communicate with the inside of the receptacle and disposed in such a manner as to enable the pump to operate in the head-down position; a second opening, distinct from the at least one opening, wherein the second opening defines a seat for a suction check valve comprising a ball to operate in a head-up position; an air intake passage between the stationary portion and the moving assembly, said passage being distinct from said opening; a first lip arranged, after displacement of the moving assembly from a rest position in the substance-dispensing direction, to press in leaktight manner against the pump body and to prevent communication via said opening between the inside of the receptacle and the pump chamber; a second lip situated above the first, when the pump is observed in the head-up position, said second lip being arranged, at least when the moving assembly is in an end-of-stroke position inside the pump body, to press in leaktight manner against the pump body and prevent communication via the inside of the pump body and said opening between the inside of the receptacle and the outside; and a base portion, configured for mounting on a receptacle, the pump body being fixed on said base portion, the air intake passage being formed at least in part between the base portion and a top end of the pump body. 25. A pump according to claim 24, the pump body being fixed on said base portion by snap-fastening. 26. A pump according to claim 24, wherein at least one of the first and second lips is arranged to press permanently against the pump body. 27. A pump according to claim 24, wherein the first lip presents a substantially frustoconical shape diverging towards the pump chamber. 28. A pump according to claim 24, wherein the second lip presents an arcuate shape that is concave towards the inside surface of the pump body, pressing via bottom and top edges against the pump body. 29. A pump according to claim 24, wherein the moving assembly includes an outlet passage for the substance and a shutter arranged to close said passage while the volume of the pump chamber is increasing and to release said passage while the volume of the pump chamber is decreasing, and once the pressure of the substance inside the pump chamber has reached a predefined value. 30. A pump according to claim 29, wherein the moving assembly has an inside space into which the substance outlet passage opens out and in which the shutter is disposed. 31. A pump according to claim 29, wherein the shutter comprises a tubular body closed at its top end by a substantially frustoconical portion suitable for closing the substance outlet passage. 32. A pump according to claim 31, wherein the shutter further includes an annular lip outside the tubular body and suitable for pressing against a wall defining the inside space, said annular lip presenting, when the pump is observed in the head-up position, a shape that is substantially frustoconical, diverging upwards and situated beneath the outlet passage putting the inside space into communication with the pump chamber. 33. A pump according to claim 30, wherein the shutter is urged into its closed position by a resilient return element disposed in the inside space. 34. A pump according to claim 24, including a resilient return element suitable for returning the moving assembly into its rest position. 35. A pump according to claim 34, wherein the resilient return element is disposed in the pump chamber. 36. A pump according to claim 24, wherein the pump body is arranged to enable a dip tube to be fixed thereto. 37. A pump according to claim 36, including a suction check valve that closes while the volume of the pump chamber is decreasing and that opens while the volume of the pump chamber is increasing, wherein this check valve is disposed in such a manner as to enable the pump chamber to be fed with substance via the dip tube when the pump is used in the head-up position. 38. A pump according to claim 26, wherein both lips press permanently against the pump body. 39. A pump according to claim 33, wherein the resilient return element is a helical spring working in compression. 40. A pump according to claim 24, wherein the base portion comprises a central portion having two tubular walls interconnected by an annular wall at their top end, thereby defining a downwardly annular groove in which the pump body is engaged. 41. A pump according to claim 24, wherein the radially-outer tubular wall has a bead on its radially inside face enabling the pump body to be snap-fastened to the base portion, the pump body being provided for this purpose with an annular bead at its stop end. 42. A pump according to claim 24, wherein the base portion comprises an assembly skirt for securing to the neck of the receptacle. 43. A pump according to claim 24, wherein the pump body is fixed in said base portion independently of the receptacle. 44. A receptacle fitted with a pump according to claim 24. 45. A pump according to claim 24, comprising an endpiece for securing a dip tube, said endpiece having an inlet port different than said at least one opening. 46. A pump for fixing on a receptacle, the pump comprising: a stationary portion comprising a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a pump chamber of variable volume; at least one opening in the pump body enabling the pump chamber to communicate with the inside of the receptacle and configured to enable the pump to operate in a head-down position; a second opening, distinct from the at least one opening, wherein the second opening defines a seat for a suction check valve comprising a ball operation in a head-up position; an air intake passage between the stationary portion and the moving assembly, said passage being distinct from said opening; a first lip configured, after displacement of the moving assembly from a rest position in the substance-dispensing direction, to press in leaktight manner against the pump body and to prevent communication via said opening between the inside of the receptacle and the pump chamber; a second lip situated above the first, when the pump is observed in the head-up position, said second lip being configured, at least when the moving assembly is in an end-of-stroke position inside the pump body, to press in leaktight manner against the pump body and prevent communication via the inside of the pump body and said opening between the inside of the receptacle and the outside; and a base portion enabling the pump to be fixed on a receptacle, wherein the pump body is fixed in said base portion independently of the receptacle. 47. A pump according to claim 46, comprising an endpiece for securing a dip tube, said endpiece having an inlet port different than said at least one opening.