US5261601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid dispensing apparatus having a vibrating perforate membrane
Assignee: Consort Medical Ltd
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Filing: 1992-07-06
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Granted: 1993-11-16
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Expires: 2012-07-06
Abstract
Abstract Dispensing apparatus comprises a housing defining a chamber receiving liquid to be dispensed and comprising a perforate membrane which defines a front wall of the chamber. A vibrating means is connected to the housing and is operable to vibrate the perforate membrane to dispense droplets of liquid through holes in the perforate membrane. The membrane defines an array of holes each of which is flared such that the cross-section narrows in a direction from the rear surface of the membrane in contact with the liquid towards the front surface of the membrane. The apparatus is suitable for dispensing pharmaceutical products as an atomized mist and provides a hand-held inhaler for oral inhalation.
Inventors
- 👤 Calvin J. Ross
- 👤 Victor C. Humberstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B17/0638; A; A61; A61M; A61M11/00; A61M15/00; A61M15/0085; B05B17/0646; A61M2205/00; A61M2205/82; A61M2205/8206; Y; Y10; Y10S; Y10S261/00; Y10S261/48
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
79 words
A method of dispensing a liquid as an atomised spray comprising the steps of maintaining the liquid in contact with a rear surface of a vibratable perforate membrane defining an array of holes, each hole being flared such that the cross-section of each hole narrows in a direction from the rear surface towards a front surface of the membrane, and vibrating the membrane such that droplets of the liquid are dispensed through the flared holes as an atomised spray.
Claim 2
Independent Claim
79 words
A method of dispensing a liquid as an atomised spray comprising the steps of maintaining the liquid in contact with a rear surface of a vibratable perforate membrane defining an array of holes, each hole being flared such that the cross-section of each hole narrows in a direction from the rear surface towards a front surface of the membrane, and vibrating the membrane such that droplets of the liquid are dispensed through the flared holes as an atomised spray.
Claim 3
Independent Claim
101 words
A method of dispensing a liquid as an atomised spray comprising the steps of maintaining the liquid in contact with a rear surface of a vibratable perforate membrane comprising an electroformed metal sheet defining an array of holes, each hole being flared such that the cross-section of each hole narrows in a direction from the rear surface towards a front surface of the membrane, the diameter of the holes at the front surface being less than or equal to 20 microns, and vibrating the membrane such that droplets of the liquid are dispensed through the flared holes as an atomised spray.
Claim 4
Independent Claim
101 words
A method of dispensing a liquid as an atomised spray comprising the steps of maintaining the liquid in contact with a rear surface of a vibratable perforate membrane comprising an electroformed metal sheet defining an array of holes, each hole being flared such that the cross-section of each hole narrows in a direction from the rear surface towards a front surface of the membrane, the diameter of the holes at the front surface being less than or equal to 20 microns, and vibrating the membrane such that droplets of the liquid are dispensed through the flared holes as an atomised spray.
Claim 5
Independent Claim
117 words
A method of dispensing a liquid as an atomised spray comprising the steps of maintaining the liquid in contact with a rear surface of a perforate membrane defining an array of holes, each hole being flared such that the cross-section of each hole narrows in a direction from the rear surface towards a front surface of the membrane, said membrane being stiffened by means of a grid of support elements, and said membrane having a sheet defining the array of holes and having thickened portions constituting the support elements, and vibrating said membrane with the grid of support elements and flared holes such that droplets of the liquid are dispensed through the holes as an atomised spray.
Claim 6
Independent Claim
117 words
A method of dispensing a liquid as an atomised spray comprising the steps of maintaining the liquid in contact with a rear surface of a perforate membrane defining an array of holes, each hole being flared such that the cross-section of each hole narrows in a direction from the rear surface towards a front surface of the membrane, said membrane being stiffened by means of a grid of support elements, and said membrane having a sheet defining the array of holes and having thickened portions constituting the support elements, and vibrating said membrane with the grid of support elements and flared holes such that droplets of the liquid are dispensed through the holes as an atomised spray.
Claim 7
Dependent Claim
34 words
A method as claimed in claim 3 wherein wetting of the front surface of the membrane by the liquid is inhibited by means of a liquid repellant surface coating applied to the front surface.
Claim 8
Dependent Claim
19 words
A method as claimed in claim 3 wherein the liquid comprises a pharmaceutical product in aqueous solution or suspension.
Claim 9
Dependent Claim
31 words
A method as claimed in claim 3 wherein the liquid comprises a pharmaceutical product and the holes have a diameter at the front surface in the range 3 to 7 microns.
Claim 10
Dependent Claim
95 words
Dispensing apparatus for use in dispensing liquid as an atomised spray comprising a vibratable perforate membrane defining an array of holes and having a front surface and rear surface, liquid supply means for supplying the liquid in contact with the rear surface, and vibrating means operable to vibrate the membrane relative to the liquid supply means such that droplets of the liquid are dispensed through the holes as an atomised spray, wherein each hole is flared such that the cross-section of each hole narrows in a direction from the rear surface towards the front surface.
Claim 11
Dependent Claim
95 words
Dispensing apparatus for use in dispensing liquid as an atomised spray comprising a vibratable perforate membrane defining an array of holes and having a front surface and rear surface, liquid supply means for supplying the liquid in contact with the rear surface, and vibrating means operable to vibrate the membrane relative to the liquid supply means such that droplets of the liquid are dispensed through the holes as an atomised spray, wherein each hole is flared such that the cross-section of each hole narrows in a direction from the rear surface towards the front surface.
Claim 12
Dependent Claim
118 words
Dispensing apparatus for use in dispensing liquid as an atomised spray comprising a vibratable perforate membrane comprising an electroformed metal sheet defining an array of holes and having a front surface and a rear surface, liquid supply means for supplying the liquid in contact with the rear surface, and vibrating means operable to vibrate the membrane relative to the liquid supply means such that droplets of the liquid are dispensed through the holes as an atomised spray, wherein each hole is flared such that the cross-section of each hole narrows in a direction from the rear surface towards the front surface and the holes have a diameter at the front surface less than or equal to 20 microns.
Claim 13
Dependent Claim
118 words
Dispensing apparatus for use in dispensing liquid as an atomised spray comprising a vibratable perforate membrane comprising an electroformed metal sheet defining an array of holes and having a front surface and a rear surface, liquid supply means for supplying the liquid in contact with the rear surface, and vibrating means operable to vibrate the membrane relative to the liquid supply means such that droplets of the liquid are dispensed through the holes as an atomised spray, wherein each hole is flared such that the cross-section of each hole narrows in a direction from the rear surface towards the front surface and the holes have a diameter at the front surface less than or equal to 20 microns.
Claim 14
Dependent Claim
125 words
Dispensing apparatus for use in dispensing liquid as an atomised spray comprising a perforate membrane defining an array of holes and having a front surface and a rear surface, liquid supply means for supplying the liquid in contact with the rear surface, and vibrating means operable to vibrate the membrane such that droplets of the liquid are dispensed through the holes as an atomised spray; wherein each hole is flared such that the cross-section of each hole narrows in a direction from the rear surface towards the front surface, wherein the perforate membrane comprises a sheet defining the array of holes through which liquid is dispensed in use and support means supporting the sheet, and wherein said support means comprises a grid of support elements.
Claim 15
Dependent Claim
125 words
Dispensing apparatus for use in dispensing liquid as an atomised spray comprising a perforate membrane defining an array of holes and having a front surface and a rear surface, liquid supply means for supplying the liquid in contact with the rear surface, and vibrating means operable to vibrate the membrane such that droplets of the liquid are dispensed through the holes as an atomised spray; wherein each hole is flared such that the cross-section of each hole narrows in a direction from the rear surface towards the front surface, wherein the perforate membrane comprises a sheet defining the array of holes through which liquid is dispensed in use and support means supporting the sheet, and wherein said support means comprises a grid of support elements.
Claim 16
Dependent Claim
22 words
Dispensing apparatus as claimed in claim 9 wherein the support elements are formed integrally with the sheet and comprise thickened portions thereof.
Claim 17
Dependent Claim
35 words
Dispensing apparatus as claimed in claim 9 wherein the grid of support elements comprises a plurality of circumferentially spaced radially extending elements connected to an annular support element defining a central portion of the sheet.
Claim 18
Dependent Claim
20 words
Dispensing apparatus as claimed in claim 9 wherein the front face of the perforate membrane comprises a liquid repellant surface.
Claim 19
Dependent Claim
16 words
Dispensing apparatus as claimed in claim 9 wherein the perforate membrane comprises an electroformed metal sheet.
Claim 20
Dependent Claim
21 words
Apparatus as claimed in claim 9 wherein the holes have a diameter at the front surface substantially equal to 3 microns.
Claim 21
Dependent Claim
24 words
Apparatus as claimed in claim 9 wherein the holes have a diameter at the front surface in the range of 3 to 7 microns.
Claim 22
Dependent Claim
78 words
Apparatus as claimed in claim 9 wherein each hole is defined by a generally tubular surface exending through the membrane, the tubular surface comprising a substantially cylindrical portion intersecting substantially at right angles with the front surface of the membrane and a flared portion merging smoothly with the cylindrical portion and increasing in aperture at a progressively increasing rate with respect to distance towards the rear surface so as to merge smoothly and continuously with the rear surface.
References Cited (Backward Citations)
US3790079A
Cited
US3812854A
Cited
GB1454597A
Cited
US3804329A
Cited
US3958249A
Cited
US4294407A
Cited
US4261512A
Cited
US4368476A
Cited
US4431136A
Cited
US4465234A
Cited
EP0049636A1
Cited
JPS57105608A
Cited
US4479609A
Cited
JPS5862411A
Cited
US4533082A
Cited
US4605167A
Cited
US4530464A
Cited
JPS604714A
Cited
EP0134847A1
Cited
US4790479A
Cited
US4550325A
Cited
GB2177623A
Cited
US4702418A
Cited
US4828886A
Cited
US4888516A
Cited
US5021701A
Cited
EP0480615A1
Cited
WO1992011050A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-15 | 2005-05-17 | 2005-11-16 | $7700.00 | Window Closed / Lapsed |