AU2008100690A4 - Dose metering valve for aerosol containers - Google Patents
Dose metering valve for aerosol containers Download PDFInfo
- Publication number
- AU2008100690A4 AU2008100690A4 AU2008100690A AU2008100690A AU2008100690A4 AU 2008100690 A4 AU2008100690 A4 AU 2008100690A4 AU 2008100690 A AU2008100690 A AU 2008100690A AU 2008100690 A AU2008100690 A AU 2008100690A AU 2008100690 A4 AU2008100690 A4 AU 2008100690A4
- Authority
- AU
- Australia
- Prior art keywords
- valve
- valve stem
- stem
- void space
- valve body
- 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.)
- Ceased
Links
- 239000000443 aerosol Substances 0.000 title claims description 14
- 239000011800 void material Substances 0.000 claims description 11
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000001351 cycling effect Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000000881 depressing effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
- B65D83/44—Valves specially adapted for the discharge of contents; Regulating devices
- B65D83/52—Metering valves; Metering devices
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Description
P/00/012 Regulation 3.2
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION INNOVATION PATENT Invention Title: "DOSE METERING VALVE FOR AEROSOL CONTAINERS" The following statement is a full description of this invention, including the best method of performing it known to me/us: 00 DOSE METERING VALVE FOR AEROSOL CONTAINERS FIELD OF THE INVENTION The invention relates generally to dose metering valves, and in particular, but not exclusively, to dose metering valves for aerosol containers _having a central valve stem.
00 oO BACKGROUND OF THE INVENTION Aerosol containers are small pressurized containers used to store a dispensable product. They characteristically consist of a cylindrical canister, with the top closure of the canister being a metal cup equipped with a centrally mounted container valve assembly. Depression of the container valve stem protruding from a hole in the centre of the cup permits product to discharge from the container.
Frequently it is desirable to dispense accurately metered doses of product from an aerosol container, rather than have a continuous discharge.
The two most common methods of dispensing metered doses are:- 1. By connecting a separate discrete dose metering valve assembly onto the protruding end of the container valve stem such that it holds the container valve stem permanently depressed and permits uninterrupted entry of product into the metering valve chamber. A metered dose of product is dispensed each time the metering valve is cycled.
00 2
O
2. By using an aerosol container valve assembly which is designed to function as a dose metering valve assembly. A metered dose of product is dispensed each time the metering valve stem is cycled.
The dose metering valve assembly covered by this invention incorporates this second method for dispensing metered doses of product.
00 SUMMARY OF THE INVENTION According to one aspect, the present invention is a valve assembly for aerosol containers comprising a tubular valve body containing upper and lower resilient seals separated by and sealing against the upper and lower faces of a spacer sleeve inserted inside the valve body, this assembly being rigidly clamped together by tight insertion into an internal cylindrical pocket in the closure cup for the aerosol container.
Optionally, the valve assembly is fitted with an essentially cylindrical valve stem which seals against and is a sliding fit through central holes in the resilient seals, such valve stem having hollow recesses molded into either end, the recesses being radially vented to the outer cylindrical surface of the valve stem by two corresponding sets of gas ports located axially along the length of the valve stem in such positions that a void space in the valve assembly defined by the resilient seals, the inner surface of the spacer sleeve and the outer surface of the cylindrical valve stem can only be exposed to one of the sets of gas ports in any situation, irrespective of the axial position of the valve stem relative to the valve body.
00 3 Optionally, the valve stem is energized to move out of the valve body by means of a compression spring mounted in the valve body and thrusting N against the end of the valve stem, such outward movement of the valve stem being limited by a rim feature formed on the outer cylindrical surface of the valve stem, this rim feature being axially positioned along the valve stem _such that it is within the void space defined by the two resilient seals, and 00oO Smore particularly it is positioned such that when the spring pushes it into bearing against the outermost resilient seal, the outer set of gas ports are outside of the void space and the inner set of gas ports are exposed to the void space.
Optionally, cycling a travel of the valve stem on said valve assembly causes metered doses of product to be discharged.
BRIEF DESCRIPTON OF THE DRAWING The drawing is a side cross-sectional view of a dose metering valve according to some embodiments of the present invention.
DETAILED DESCRIPTION Referring to the drawing, the invention incorporates a valve stem a valve body together with a tubular valve sleeve The valve stem is energized by a valve spring The upper edge of the valve sleeve (3) seals against a resilient dose valve seal which in turn seals against a valve cup The lower edge of the valve sleeve locates and seals 00 1+ O against a resilient product valve seal which in turn seals against an internal seal ledge in the valve body SThe dose volume is defined by the void space bounded by: the lower face of the dose valve seal the upper face of the product valve seal the internal surface of the valve sleeve and that portion of the valve stem _outer surface bounded by the two valve seals and 00 SThe lower face of the dose valve seal serves as the functional edge of the dose valve.
The upper face of product valve seal serves as the functional edge of the product valve.
The valve assembly is mechanically attached to the valve cup by staking the side wall of the pedestal portion of the valve cup such that it is indented to grip under the bottom edge of an outwardly projecting rim around the upper portion of the valve body The mid portion of the valve stem features a stem rim When the valve stem is in its extended position the top face of the rim (8) restricts the valve stem extension travel by pressing against the underside of the dose valve seal When the valve stem is in its depressed position the bottom face of this rim restricts the valve stem depression by pressing against a valve sleeve ledge (18).
In situations where a product bag is attached to the outside of the valve body, the bag is sealed against the valve body by a resilient product bag seal The bag may be held at a position shown by using a bag 00 O retainer such that the margin of the orifice in the bag is axially Z coincident with the product valve functional edge (13).
Operation of the meterinq valve This is achieved by depression of the valve stem. Initial depression of the valve stem causes the product valve (13) to close. This occurs after the _the product valve gas port (14) has moved fully past the functional edge of 00 Sthe product valve (13).
As soon as the product valve has closed, the metered dose is confined in the void space between the two closed valves.
Further depression of the valve stem causes the dose valve (11 to open.
This occurs when the dose valve gas port (12) slides past the functional edge of the dose valve (11).
As soon as the dose valve opens, the metered dose is released to the outside environment.
Fillinq of the aerosol container This is achieved by fully depressing the valve stem so the dose valve is fully open. Aerosol product is then pumped into the valve stem. The product enters the void space bounded by: the lower face of the dose valve seal the upper face of the product valve seal the internal surface of the valve sleeve and that portion of valve stem outer surface bounded by the two valve seals and The pressure exerted on the top face of the product valve seal (7) causes the central unsupported portion of this seal to deflect downwards and 00 6 c, come out of contact with the valve stem. Product is then able to flow through the resultant annular gap and enter the aerosol container.
N
00
Claims (4)
1. A valve assembly for aerosol containers comprising a tubular valve body containing upper and lower resilient seals separated by and sealing against the upper and lower faces of a spacer sleeve inserted inside the _valve body, this assembly being rigidly clamped together by tight insertion 00 O Ointo an internal cylindrical pocket in the closure cup for the aerosol container.
2. The valve assembly according to claim 1, fitted with an essentially cylindrical valve stem which seals against and is a sliding fit through central holes in the resilient seals, such valve stem having hollow recesses molded into either end, the recesses being radially vented to the outer cylindrical surface of the valve stem by two corresponding sets of gas ports located axially along the length of the valve stem in such positions that a void space in the valve assembly defined by the resilient seals, the inner surface of the spacer sleeve and the outer surface of the cylindrical valve stem can only be exposed to one of the sets of gas ports in any situation, irrespective of the axial position of the valve stem relative to the valve body.
3. The valve assembly according to claim 1 or claim 2, wherein the valve stem is energized to move out of the valve body by means of a compression spring mounted in the valve body and thrusting against the end of the valve stem, such outward movement of the valve stem being limited by a rim feature formed on the outer cylindrical surface of the valve stem, this rim 00 0 Sfeature being axially positioned along the valve stem such that it is within the void space defined by the two resilient seals, and more particularly it is N positioned such that when the spring pushes it into bearing against the outermost resilient seal, the outer set of gas ports are outside of the void space and the inner set of gas ports are exposed to the void space. 00oo
4. The valve assembly according to any one of claims 1-3, wherein cycling a travel of the valve stem on said valve assembly causes metered doses of product to be discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2008100690A AU2008100690A4 (en) | 2008-07-25 | 2008-07-25 | Dose metering valve for aerosol containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2008100690A AU2008100690A4 (en) | 2008-07-25 | 2008-07-25 | Dose metering valve for aerosol containers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2008100690A4 true AU2008100690A4 (en) | 2008-08-28 |
Family
ID=39735983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2008100690A Ceased AU2008100690A4 (en) | 2008-07-25 | 2008-07-25 | Dose metering valve for aerosol containers |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2008100690A4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235527A (en) * | 2010-04-30 | 2011-11-09 | 麦格纳姆制造有限公司 | Metering valve |
| CN112710369A (en) * | 2020-12-25 | 2021-04-27 | 美埃(中国)环境科技股份有限公司 | Assembly for real-time monitoring and transmitting filter weight |
-
2008
- 2008-07-25 AU AU2008100690A patent/AU2008100690A4/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235527A (en) * | 2010-04-30 | 2011-11-09 | 麦格纳姆制造有限公司 | Metering valve |
| CN102235527B (en) * | 2010-04-30 | 2014-06-04 | 麦格纳姆制造有限公司 | Metering valve |
| CN112710369A (en) * | 2020-12-25 | 2021-04-27 | 美埃(中国)环境科技股份有限公司 | Assembly for real-time monitoring and transmitting filter weight |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |