IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0484589
(2009-06-15)
|
등록번호 |
US-8348177
(2013-01-08)
|
발명자
/ 주소 |
- Loverich, Jacob
- Frank, Jeremy
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
144 |
초록
▼
A liquid dispensing device using a piezoelectric member in connection with an atomizing head and a passive metering method to supply liquid to the atomizing head. Preferably, the device is used to but not limited to dispensing of fragrances, insecticides or other aromatic solutions. The piezoelectri
A liquid dispensing device using a piezoelectric member in connection with an atomizing head and a passive metering method to supply liquid to the atomizing head. Preferably, the device is used to but not limited to dispensing of fragrances, insecticides or other aromatic solutions. The piezoelectric member does not vibrate the nozzle plate through which the liquid is dispensed. The passive metering method relies only on surface tension forces within the supply passageway. The device can work with a wider range of liquid properties than existing piezoelectric devices of this type. The passive metering method is robust and consistent, enabling larger and more varied liquid reservoirs because the reservoir height is not a factor in determining the performance of the device. The atomizing head functions with a wider range of liquids than atomizers whose nozzle plates are directly excited.
대표청구항
▼
1. An atomizing head for use in a liquid dispensing device, said atomizing head comprising: first and second members which each have front and rear planar surfaces, said first member has an aperture which extends therethrough from said front planar surface thereof to said rear planar surface thereof
1. An atomizing head for use in a liquid dispensing device, said atomizing head comprising: first and second members which each have front and rear planar surfaces, said first member has an aperture which extends therethrough from said front planar surface thereof to said rear planar surface thereof;at least one nozzle associated with said first member for dispersing liquid;a piezoelectric member affixed to said rear planar surface of said second member;a first plate having front and rear planar surfaces, said front planar surface of said first plate being affixed to said rear planar surface of said first member, said rear planar surface of said first plate being affixed to said front surface of said second member, said first plate defining an aperture therethough, said aperture of said first plate defining a liquid chamber which is defined between said first and second members, said at least one nozzle being in fluid communication with said liquid chamber; anda second plate having front and rear surfaces, said second plate having at least one hole which extends therethrough from said front surface to said rear surface, said front surface of said second plate being affixed to said rear planar surface of said first member in such a manner that said at least one hole defined by said second plate is in fluid communication with said aperture defined by said first member, said at least one hole of said second plate defining said at least one nozzle associated with said first member, said second plate being positioned within said aperture of said first plate and further defining said liquid chamber. 2. The atomizing bead as defined in claim 1, wherein said second plate has approximately 10 to 200 holes extending therethrough. 3. The atomizing head as defined in claim 1, wherein said at least one hole extending through said second plate has a smallest diameter of approximately 5 to 20 um. 4. The atomizing head as defined in claim 1, wherein said first member is a cylindrical plate. 5. The atomizing head as defined in claim 1, wherein said first plate defines an axial distance between said first member and said second member. 6. The atomizing head as defined in claim 5, wherein said axial distance between said first member and said second member is approximately 25 to 100 um. 7. The atomizing head as defined in claim 1, wherein said aperture provided through said first plate is generally circular in configuration. 8. The atomizing head as defined in claim 1, wherein said aperture provided through said first plate defines a notch at a lower end thereof, said notch being positioned below said first and second members in order to allow liquid to enter said liquid chamber via said notch. 9. The atomizing head as defined in claim 1, wherein said second member is a solid cylindrical plate. 10. The atomizing head as defined in claim 1, wherein said piezoelectric member is in the shape of a ring. 11. The atomizing head as defined in claim 1, wherein said nozzles are tapered in configuration. 12. An atomizing head for use in a liquid dispensing device, said atomizing head comprising: a first member having a front surface and a rear planar surface, the first member defining an aperture which extends therethrough from the front surface to the rear planar surface;a second member having a front planar surface and a rear surface;a spacer member having front and rear planar surfaces, the spacer member being positioned between the first and second members with the front planar surface of the spacer member being affixed to the rear planar surface of the first member and with the rear planar surface of the spacer member being affixed to the front planar surface of the second member, the spacer member defining an aperture which extends therethrough from the front planar surface thereof to the rear planar surface thereof, the aperture of the spacer member defining a liquid chamber which is defined between the rear planar surface of the first member and the front planar surface of the second member;a piezoelectric member affixed to the rear surface of the second member; anda plate member having a front planar surface and a rear surface, the front planar surface of the plate member being affixed to the rear planar surface of the first member and being sized to cover the aperture defined by the first member, the plate member being wholly positioned within the liquid chamber defined by the aperture of the spacer member, the rear surface of the plate member being separated from the front planar surface of the second member, the plate member defining at least one nozzle-shaped hole which extends therethrough from the front planar surface thereof to the rear surface thereof, the at least one nozzle-shaped hole of the plate member being in fluid communication with both the aperture of the first member and the liquid chamber,whereby activation of the piezoelectric member causes the second member to vibrate, thereby generating oscillating motion and pressure in liquid contained in the liquid chamber and causing the liquid to be atomized and dispersed through the at least one nozzle-shaped hole, through the aperture of the first member and outward beyond the front surface of the first member. 13. The atomizing head as defined in claim 12, wherein the front surface of the first member is planar. 14. The atomizing head as defined in claim 12, wherein the rear surface of the second member is planar. 15. The atomizing head as defined in claim 12, wherein the rear surface of the plate member is planar. 16. The atomizing head as defined in claim 12, wherein an axial distance between the front planar surface of the plate member and the rear surface of the plate member is between 25 and 100 um. 17. The atomizing head as defined in claim 12, wherein the at least one nozzle-shaped hole is tapered from the rear surface of the plate member to the front planar surface of the plate member. 18. The atomizing head as defined in claim 12, wherein the at least one nozzle-shaped hole has a minimum diameter of between 5 and 20 um. 19. The atomizing head as defined in claim 12, wherein the plate member has approximately 10 to 200 nozzle-shaped holes extending therethrough. 20. The atomizing head as defined in claim 12, wherein the piezoelectric member is in the shape of a ring. 21. The atomizing head as defined in claim 12, wherein the atomization and dispersion of the liquid through the at least one nozzle-shaped hole is not caused by a significant volume change of the liquid chamber. 22. The atomizing head as defined in claim 12, wherein the second member is formed of an electrically conductive material such that the second member vibrates when the piezoelectric member is vibrated. 23. The atomizing head as defined in claim 12, wherein the spacer member further has a delivery passageway provided therein for providing liquid to the liquid chamber, the liquid chamber being located above the delivery passageway. 24. The atomizing head as defined in claim 12, wherein the first member is a cylindrical plate. 25. The atomizing head as defined in claim 12, wherein the aperture provided through the spacer member is generally circular in configuration. 26. The atomizing head as defined in claim 12, wherein the aperture provided through the spacer member defines a notch at a lower end thereof, the notch being positioned below the first and second members in order to allow liquid to enter the liquid chamber via the notch. 27. The atomizing head as defined in claim 12, wherein the second member is a solid cylindrical plate.
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