EP0416694B1 - Liquid drop dispensing tip - Google Patents
Liquid drop dispensing tip Download PDFInfo
- Publication number
- EP0416694B1 EP0416694B1 EP90202323A EP90202323A EP0416694B1 EP 0416694 B1 EP0416694 B1 EP 0416694B1 EP 90202323 A EP90202323 A EP 90202323A EP 90202323 A EP90202323 A EP 90202323A EP 0416694 B1 EP0416694 B1 EP 0416694B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- orifice
- liquid drop
- dispensing tip
- delivery
- drop dispensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D47/00—Closures with filling and discharging, or with discharging, devices
- B65D47/04—Closures with discharging devices other than pumps
- B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
- B65D47/18—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages for discharging drops; Droppers
Definitions
- This invention is concerned with a novel design of a dropper tip useful on conventional medicine droppers used primarily for dispensing ophthalmic medications.
- the conventional ophthalmic drug delivery system consisting of a dropper tip, 1, and squeeze bottle, 2, is intended to deliver the medication in a drop by drop manner, the drops being of a uniform predetermined size.
- the drop size control is achieved by means of the hydraulic resistence presented by a small diameter channel, 3, forming the beginning of the straight delivery channel, 4, in the dropper tip, 1, having a diameter of about 0.006 inches or 0.150 mm. which restricts the flow from the squeeze bottle, 2.
- This conventional drug delivery system generally serves the intended purpose but in the hands of many patients does not always result in discrete drops but rather streaming of the liquid resulting in loss of medication, and possibly soiled clothes and other fabrics.
- a dropper tip providing better delivery control, that requires a lower level of technology to fabricate, thus lowering the cost per unit device, and permitting fabrication practically anywhere in the world.
- the restriction to flow or hydraulic resistance is provided, not by a narrow channel that is difficult to fabricate, but in part by a convoluted delivery path causing the liquid flow to change direction as it enters the delivery channel which impedes the conversion of the internal static energy provided by squeezing of the bottle into the kinetic energy of the liquid flow.
- the cross-section of the orifice can be of any shape such as circular, triangular, semicircular, irregular or rectangular, preferably the latter, in which case the hydraulic resistance to fluid delivery is determined in part by the dimensions of the rectangle a long and narrow rectangular orifice providing greater hydraulic resistance than a square orifice of the same cross-section area.
- the orifice has a cross-sectional area of about 0.015 to 0.02 mm2.
- the size and shape of the orifice, 7, can be controlled by simplified molding techniques within desired specifications.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Description
- This invention is concerned with a novel design of a dropper tip useful on conventional medicine droppers used primarily for dispensing ophthalmic medications.
- The conventional ophthalmic drug delivery system, FIG. 1, consisting of a dropper tip, 1, and squeeze bottle, 2, is intended to deliver the medication in a drop by drop manner, the drops being of a uniform predetermined size. The drop size control is achieved by means of the hydraulic resistence presented by a small diameter channel, 3, forming the beginning of the straight delivery channel, 4, in the dropper tip, 1, having a diameter of about 0.006 inches or 0.150 mm. which restricts the flow from the squeeze bottle, 2. This conventional drug delivery system generally serves the intended purpose but in the hands of many patients does not always result in discrete drops but rather streaming of the liquid resulting in loss of medication, and possibly soiled clothes and other fabrics.
- In addition conventional dropper tips with the narrow channel, 3, are commonly fabricated from plastics by injection molding techniques which require a complex technology not readily available in less developed countries.
- Both EP-A-0 378 935 and GB-A-874 952 disclose dropper devices which have orifices that are not concentric with the delivery channel.
- Now with the present invention there is provided a dropper tip providing better delivery control, that requires a lower level of technology to fabricate, thus lowering the cost per unit device, and permitting fabrication practically anywhere in the world.
- These advantages are achieved by the design of the tip, 5, shown in Fig. 2, wherein entry to the delivery channel, 6, is not through a narrow channel, but rather through an orifice, 7, which is not concentric with the delivery channel but rather at an angle, preferably right angle, to it on the side of the hub, 8.
- In the novel tip of this invention the restriction to flow or hydraulic resistance, is provided, not by a narrow channel that is difficult to fabricate, but in part by a convoluted delivery path causing the liquid flow to change direction as it enters the delivery channel which impedes the conversion of the internal static energy provided by squeezing of the bottle into the kinetic energy of the liquid flow.
- In addition, the cross-section of the orifice can be of any shape such as circular, triangular, semicircular, irregular or rectangular, preferably the latter, in which case the hydraulic resistance to fluid delivery is determined in part by the dimensions of the rectangle a long and narrow rectangular orifice providing greater hydraulic resistance than a square orifice of the same cross-section area. Regardless of shape, the orifice has a cross-sectional area of about 0.015 to 0.02 mm².
- The size and shape of the orifice, 7, can be controlled by simplified molding techniques within desired specifications.
Claims (4)
- A dropper tip (1) for the controlled, non-streaming delivery of discrete drops of a liquid, providing entry to the delivery channel (6) by an orifice (7) that is not concentric with the delivery channel (6), wherein the orifice (7) has a cross-sectional area of about 0.015 to 0.02 mm².
- The dropper tip of claim 1, wherein the cross-section of the orifice (7) is non-circular.
- The dropper tip of claim 1 or claim 2, wherein the orifice (7) is at a right angle to the delivery channel (6).
- The dropper tip of any one of the preceding claims, wherein the cross-section of the orifice (7) is rectangular in shape.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US40454089A | 1989-09-08 | 1989-09-08 | |
US404540 | 1989-09-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0416694A1 EP0416694A1 (en) | 1991-03-13 |
EP0416694B1 true EP0416694B1 (en) | 1994-07-13 |
Family
ID=23600011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90202323A Expired - Lifetime EP0416694B1 (en) | 1989-09-08 | 1990-09-01 | Liquid drop dispensing tip |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0416694B1 (en) |
JP (1) | JPH069599B2 (en) |
CA (1) | CA2024673A1 (en) |
DE (1) | DE69010597T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009079753A1 (en) * | 2007-12-21 | 2009-07-02 | Pharmascience Inc. | Pharmaceutical delivery device |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0720997U (en) * | 1993-09-21 | 1995-04-18 | 山崎産業株式会社 | Western style handrail device |
US6098852A (en) * | 1999-01-27 | 2000-08-08 | Automatic Liquid Packaging, Inc. | Tip for liquid drop dispensing container |
JP3922910B2 (en) * | 2001-10-31 | 2007-05-30 | 参天製薬株式会社 | Eye drops container with stepped part |
ATE301586T1 (en) * | 2001-11-30 | 2005-08-15 | Crown Packaging Technology Inc | A CLOSURE |
JP7066134B2 (en) * | 2017-08-04 | 2022-05-13 | クラレノリタケデンタル株式会社 | Liquid pouring materials and containers |
WO2019027025A1 (en) | 2017-08-04 | 2019-02-07 | クラレノリタケデンタル株式会社 | Member for discharging liquid and container |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0222944A1 (en) * | 1985-11-07 | 1987-05-27 | Delford O. Dougherty | Drop dispenser |
EP0312725A2 (en) * | 1987-10-23 | 1989-04-26 | Bernd Dipl.-Ing. Hansen | Drop dispersing bottle and process for making it |
EP0378935A1 (en) * | 1988-12-20 | 1990-07-25 | Societe Technique De Pulverisation (S.T.E.P.) | Device to dispense a liquid or cream in droplets having small volumes |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2834520A (en) * | 1956-06-15 | 1958-05-13 | Nyden Robert | Spouts for containers |
GB874952A (en) * | 1960-05-30 | 1961-08-16 | Anchor Glass Company Ltd | A dropper device |
-
1990
- 1990-09-01 DE DE1990610597 patent/DE69010597T2/en not_active Expired - Fee Related
- 1990-09-01 EP EP90202323A patent/EP0416694B1/en not_active Expired - Lifetime
- 1990-09-05 CA CA 2024673 patent/CA2024673A1/en not_active Abandoned
- 1990-09-06 JP JP2234650A patent/JPH069599B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0222944A1 (en) * | 1985-11-07 | 1987-05-27 | Delford O. Dougherty | Drop dispenser |
EP0312725A2 (en) * | 1987-10-23 | 1989-04-26 | Bernd Dipl.-Ing. Hansen | Drop dispersing bottle and process for making it |
EP0378935A1 (en) * | 1988-12-20 | 1990-07-25 | Societe Technique De Pulverisation (S.T.E.P.) | Device to dispense a liquid or cream in droplets having small volumes |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009079753A1 (en) * | 2007-12-21 | 2009-07-02 | Pharmascience Inc. | Pharmaceutical delivery device |
Also Published As
Publication number | Publication date |
---|---|
CA2024673A1 (en) | 1991-03-09 |
DE69010597T2 (en) | 1995-01-26 |
DE69010597D1 (en) | 1994-08-18 |
JPH03111052A (en) | 1991-05-10 |
EP0416694A1 (en) | 1991-03-13 |
JPH069599B2 (en) | 1994-02-09 |
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