Claims
- 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 the 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.
- 2. A pump according to claim 1, further comprising 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 gasket comprising a radially-inner portion that presses against the pump body to prevent the substance contained in the receptacle from flowing to the outside, and is suitable for moving away therefrom under the effect of suction to enable ingress of 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 frustoconical 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 a 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 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.
Priority Claims (1)
Number |
Date |
Country |
Kind |
03 04591 |
Apr 2003 |
FR |
|
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of French Application No. 03 04591 filed on Apr. 11, 2003 and U.S. Provisional Application No. 60/470,493 filed on May 15, 2003, the entire disclosure of which is incorporated by reference herein.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60470493 |
May 2003 |
US |