A fluid spray dispenser (2) having a fluid reservoir (20) for holding a fluid to be dispensed, a spray head (23) for dispensing the fluid and a porous medium (24) through which the fluid passes from the reservoir (20) to the spray head (23). The porous medium (24) has a pathway (25) or pathways loca
A fluid spray dispenser (2) having a fluid reservoir (20) for holding a fluid to be dispensed, a spray head (23) for dispensing the fluid and a porous medium (24) through which the fluid passes from the reservoir (20) to the spray head (23). The porous medium (24) has a pathway (25) or pathways located substantially adjacent the spray head (23) for the removal of air ingested into the porous medium (24) during spraying.
대표청구항▼
1. A fluid spray dispenser comprising: a fluid reservoir for, in use, holding fluid to be dispensed;a spray head for dispensing the fluid, the spray head including a piezoelectric actuator and a perforate membrane; anda porous medium extending from the reservoir to the spray head, through which, in
1. A fluid spray dispenser comprising: a fluid reservoir for, in use, holding fluid to be dispensed;a spray head for dispensing the fluid, the spray head including a piezoelectric actuator and a perforate membrane; anda porous medium extending from the reservoir to the spray head, through which, in use, fluid passes from the reservoir to the spray head, the porous medium having a pathway located substantially adjacent the spray head, extending from the spray head, or from a point close behind the spray head, to an edge of the porous medium within the reservoir, for the removal of air ingested into the porous medium. 2. A dispenser according to claim 1, wherein the pathway is formed from one or more connected pores whose size is greater than that of the pores in the surrounding region. 3. A dispenser according to claim 1, wherein the pathway is a void formed in the porous medium. 4. A dispenser according to claim 1, wherein the pathway is a channel extending through the porous medium. 5. A dispenser according to claim 4, wherein the channel is supported by an insert in order to maintain the shape of the channel. 6. A dispenser according to claim 5, wherein the insert is made from the same material as the surrounding porous medium. 7. A dispenser according to claim 5, wherein the insert is made from a different porous or non-porous material to the surrounding porous medium. 8. A dispenser according to claim 5, wherein the insert is a hollow tube. 9. A dispenser according to claim 4, wherein the channel is conic in shape, with the narrow end towards the head. 10. A dispenser according to claim 1, wherein the pathway is formed substantially at the centre of the spray head. 11. A dispenser according to claim 1, wherein the porous medium has an effective pore size that decreases towards the spray head. 12. A dispenser according to claim 1, wherein the porous medium has a permeability that decreases towards the spray head. 13. A dispenser according to claim 1, wherein a plurality of pathways is located substantially adjacent the spray head for the removal of air ingested into the porous medium. 14. A fluid spray dispenser comprising: a fluid reservoir for, in use, holding fluid to be dispensed;a spray head for dispensing the fluid, the spray head including a piezoelectric actuator and a perforate membrane; anda porous medium extending from the reservoir to the spray head, through which, in use, fluid passes from the reservoir to the spray head, the porous medium having a pathway located substantially adjacent the spray head for the removal of air ingested into the porous medium;wherein the pathway is a channel supported by an insert in order to maintain the shape of the channel. 15. A dispenser according to claim 14, wherein the insert is made from the same material as the surrounding porous medium. 16. A dispenser according to claim 14, wherein the insert is made from a different porous or non-porous material to the surrounding porous medium. 17. A dispenser according to claim 14, wherein the insert is a hollow tube. 18. A dispenser according to claim 14, wherein the channel is conic in shape, with the narrow end towards the head. 19. A dispenser according to claim 14, wherein the pathway is formed substantially at the centre of the spray head. 20. A dispenser according to claim 14, wherein the porous medium has an effective pore size that decreases towards the spray head. 21. A dispenser according to claim 14, wherein the porous medium has a permeability that decreases towards the spray head.
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이 특허에 인용된 특허 (10)
Carter Robert E. (Auburndale MA) Murphy Donald R. (Wellesley MA), Aerosol dispenser.
Denen Dennis J. ; Myers Gary E. ; Headings Leon M. ; Clark George A. ; Navin Eric R. ; James Todd L., Control system for atomizing liquids with a piezoelectric vibrator.
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