GB2159496A - Dispensing liquids in metered aliquots - Google Patents
Dispensing liquids in metered aliquots Download PDFInfo
- Publication number
- GB2159496A GB2159496A GB08513535A GB8513535A GB2159496A GB 2159496 A GB2159496 A GB 2159496A GB 08513535 A GB08513535 A GB 08513535A GB 8513535 A GB8513535 A GB 8513535A GB 2159496 A GB2159496 A GB 2159496A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- bowl
- spool
- outlet port
- valve spool
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D3/00—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes
- B67D3/0041—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes with provisions for metering the liquid to be dispensed
- B67D3/0045—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes with provisions for metering the liquid to be dispensed by filling a predetermined volume before dispensing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D3/00—Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes
- B67D3/02—Liquid-dispensing valves having operating members arranged to be pressed upwards, e.g. by the rims of receptacles held below the delivery orifice
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
Abstract
A bottle dispenser comprises: a bowl (10) having aligned inlet and outlet ports (22, 24); a valve spool (20) having valve lands (28, 32) slidable in the inlet and outlet ports (22, 24) to control liquid flow into and out of the bowl (10); a first conical valve member (40) fast to spool (20) cooperable with a conical valve seat around the outlet port (24) to define a rest position of the valve spool (20) in which the inlet port (22) open and the outlet port (24) is closed by both the spool valve land (32) and the conical valve member (40); a second conical valve member (44) fast to spool (20), cooperable with a conical valve seat around the inlet port (22) to define a limiting position of the valve spool (20) in which the outlet port (24) is open and the inlet port (22) is closed by both the spool valve land (28) and the conical valve member (44); and actuator means (50) for moving the valve spool (20) from its rest position sequentially to close the inlet port (22) and to open the outlet port (24) to dispense liquid from bowl (10). <IMAGE>
Description
SPECIFICATION
Dispensing liquids in metered aliquots
The invention relates to apparatus for dispensing liquids in metered aliquots, for example from inverted bottles in a licensed bar. Such dispensing apparatus, generally referred to as a 'spirit optic' is commonplace in bars and on other licensed premises. The apparatus comprises a transparent-walled chamber or bowl into which the liquid to be dispensed is allowed to run under gravity. When the bowl is completely filled it contains an exact measure of liquid. The lifting of a dispensing bar, generally by contact with the rim of the glass to be filled, causes the refilling of the bowl to be temporarily interrupted while its contents are discharged into the glass under gravity. The bowl is sealed after inspection by the appropriate authorities has confirmed that its capacity accurately represents one standard measure of spirits.
All such dispensing apparatus in use incorporates two valve assemblies, one to control the ingress of liquid into the bowl and one to control its discharge from the bowl. Each valve assembly comprises a flat disc of resilient material such as a rubber which in use is pressed against an annular rim or valve seat to close the valve opening. It has been found, however, that the resilient discs tend to corrode under the action of some at least of the spirits with which they are used, and often separate from the stem of the valve member on which they are mounted. The replacement of these discs requires the opening of the sealed bowl, which therefore has to be returned for official reconfirmation of its capacity and re- sealing.Also, care must be taken to replace each disc with a new disc of the same dimensions since the use of a larger disc would reduce the effective internal volume of the bowl. The synchronization of the opening and closing movements of the two valve assemblies in the known dispensers is important. The inflow valve assembly, at the top of the bowl,shouid be closed before the outflow valve assembly, at the bottom of the bowl, is opened. Otherwise a continuous flow of liquid would be permitted when the two valve assemblies were both half open. To that end a lost motion movement is permitted between movable elements of the two valve assemblies, but this lost motion movement in turn introduces a requirement that at all stages of relative movement between the two elements the liquid capacity of the bowl should be unchanged.This complicates the design and increases the cost of the dispensing apparatus.
Many types of alcoholic drink are unsuitable for dispensation using the above dispensers. Generally this applies to drinks with a high sugar content, since sugar tends to separate out by crystallization with the result that smooth movement of the dispensing bar and associated parts is interrupted. In particular, the lost motion movement permitted between the movable elements of the two valve assemblies is generally under the influence of a light spring bias so that there is a tendency, when using a liquid with a high sugar content, for the two elements to seize solid in one relative disposition, resulting in inaccurate metering.
British Patent Specification No. 852315 discloses a much simpler design of spirit optic in which a plunger spans axially aligned inlet and outlet ports of the bowl. In its lower position the plunger does not obstruct the inlet port but closes the outlet port by means of a lower spool land axially slidable in the outlet port and a conical valve portion engaging a conical valve seat around the outlet port.
With the plunger in this position the bowl is filled, by gravity, with the liquid to be dispensed. In its raised position the plunger does not obstruct the outlet port but closes the inlet port by means of an upper spool land which has moved to a position blocking liquid flow into the bowl.
The spirit optic of British Patent Specification No.
852315 is unsatisfactory in a number of ways. The double sealing of the outlet port, by the lower spool land which blocks the outlet port and by the conical valve portion engaging the valve seat around the outlet port, provides a secure sealing action which is not prone to slow leakage or 'drips' while the plunger is in its lower, rest, position.
However raising of the plunger causes simultaneous opening of the outlet port and closing of the inlet port, with the attendant risk that some liquid will flow past the upper spool land of the plunger and the inlet port and past the lower spool land of the plunger and the outlet port when the plunger and the outlet port when the plunger is in the critical half-way position. Thus the spirit optic is inherently incapable of providing the guaranteed accuracy of delivery demanded by the licensing authorities. Moreover the location of an air inlet port beneath the bowl, communicating with the outlet port for liquid, makes it quite probable that either liquid will be allowed to leak through the air inlet port in use, or, if the liquid being dispensed is thick or viscous, that an air lock will be created, with air being unable to enter the bowl to replace the liquid therein.A further disadvantage of the spirit optic of British Patent No. 852315 is that the return spring is located actually within the inlet port, in contact with the liquid being dispensed.
This provides an unacceptable risk of contamination.
These and other disadvantages of known dispensing apparatus are overcome by the invention which provides apparatus for the gravity dispensation of metered aliquots of a liquid, the apparatus comprising: a bowl having aligned inlet and outlet ports on opposite sides thereof, a valve spool spanning the bowl and having valve lands slidable in the inlet and outlet ports to control liquid flow into and out of the bowl; a first conical valve member fast to the valve spool within the bowl, cooperable with a complementary conical valve seat around the outlet port to define a rest position of the valve spool in which the inlet port is open and the outlet port is closed by both the spool valve land and the first conical valve member; a second conical valve member fast to the valve spool within the bowl, cooperable with a comple mentary conical valve seat around the outlet port to define a limiting portion of the valve spool in which the outlet port is open and the inlet port is closed by both the spool valve land and the second conical valve member; and actuator means for moving the valve spool from its rest position to its limiting position sequentially to close the inlet port and to open the outlet port to dispense from the outlet port as a single aliquot liquid previously filled into the bowl through the inlet port.
The outlet port is closed, when the valve spool is in its rest position, by both the valve spool land in the outlet port and the conical valve member seated around the outlet port. This double valve closure is extremely effective in maintaining a secure closure of the outlet port for a range of liquids being dispensed, including the high sugar spirits, such as liqueurs. This is due in part to the fact that the conical valve sufaces are self-centering. If the valve spool is freely rotatable to find its own seating on the valve seat, then the sealing efficiency is even further improved. The conical valve member and its cooperating conical valve seat may both be formed from hard, rigid materials, as opposed to the resilient rubbery material of the valve members of previously known dispensing apparatus.As a result, the valve spool and conical valve member can be moulded in one piece from a thermoplastic resin such as nylon, and the valve seat can be moulded as an integral part of the bowl during its manufacture. It has been found that sufficient accuracy can be achieved during the injection moulding process completely to overcome any tendency for the apparatus to drip or leak liquid, without any machining or grinding of the moulded conical surfaces. This is probably due to the sharing of the sealing of the outlet port between the conical valve surfaces and the spool valve land.The latter is preferably provided with one or more sealing rings such as rubber O-rings which cooperate with a cylindrical inner surface of the outlet port to form a sliding seal, although the sealing contact need not be tight since the sliding seal is purely auxiliary to the seal established by the conical valve surfaces.
Similarly the valve land at the inlet port is augmented by a second conical valve member cooperable with a complementary conical valve seat formed around the inlet port, to define a limit to the actuating movement of the valve spool.
The valve land at the inlet port is similarly preferably provided with one or more sealing rings such as rubber O-rings which cooperate with a cylindrical inner surface of the inlet port to provide a sliding seat during actuating movement of the valve spool.
In use, with the valve spool in its rest position the inlet port is open and liquid flows under gravity into the bowl to fill the bowl. In the case of apparatus for dispensing spirits from an inverted bottle above bar height the bottle of spirits would provide a permanent reservoir for replenishing the liquid in the bowl whenever the valve land at the inlet port opens that port. As indicated above, leakage of the liquid from the bowl is prevented by the cooperating conical valve surfaces and by the valve land blocking the outlet port, particularly by the former.
When the valve spool is moved in its actuating direction, the conical valve surfaces immediately become separated. No appreciable amount of liquid flows from the bowl, however, since the outlet port is still blocked by the land of the valve spool.
Further valve spool movement immediately brings its other valve land into sliding engagement with the inlet port, blocking the inlet port. Further valve spool movement brings the lower valve land out of its sliding engagement with the outlet port, opening the outlet port so that the contents of the bowl can flow under gravity into the receptacle beneath.
At the same time an air inlet is preferably opened, at the top of the bowl to admit air into the bowl to facilitate its draining. The upper limiting position of the valve spool is defined by sealing engagement between the second conical valve member and its valve seat, so that leakage of liquid into the bowl from above is prevented both by the valve land blocking the inlet port and by the cooperating conical valve surfaces.
The actuation of the valve spool may be manual, by lifting a glass or other receptacle against a dispensing bar as in known spirit optics, or it may be magnetic or electromagnetic. The use of electromagnetically permeable magnetizable plastics compositions for the valve spool enables the actuation to be effected electromagnetically or, alternatively, permits an electromagnetic feedback to monitoring apparatus which is able to record the total amount of liquid dispensed from each dispensing apparatus. The use of electromagnetism to control the actuating movement is made possible by the remarkably small forces needed to hold the valve spool in its rest or actuating positions while still maintaining the good sealing necessary for accurate metering of the liquid.This in turn is made possible by the two different types of sealing surfaces at both inlet and outlet ports: on the one hand a valve land slidable in the port and on the other hand the cooperating conical valve surfaces which give more positive sealing.
DRA WINGS
Figure 1 is an axial section through apparatus according to the invention for serving spiritis in accurate single measures;
Figure 2 is an exploded view of the parts of Figure 1;
Figure 3 is a section along the line 3-3 of Figure 1;
Figure 4 is a section through an alternative and preferred construction of air inlet valve; and
Figure 5 is a section taken along the line V- V of
Figure 4.
In Figures 1 to 3 of the drawings, the apparatus comprises a bowl 10 moulded from clear transparent polycarbonate resin, srew.threaded into and suspended beneath a cover 12 formed with an integral bracket 14. A sealing ring 16 is trapped between the cover 12 and the bowl 10, and the bowl is secured in place by a security seal (not shown) which is applied after the liquid capacity of the bowl has been independently checked and confirmed.
A central upstanding stem 18 of the cover 12 receives a bored cork in use and is pushed into the neck of a bottle of spirits in conventional manner.
A valve spool 20 extends through the bowl 10 from an inlet port 22 in the cover 12, at the top of the bowl, to an outlet port 24 in the bottom of the bowl. At its upper end portion the valve spool 20 is splined at 26 to provide three longitudinal inlet passages through the inlet port 22, and immediately beneath the splines 26 the valve spool has a cylindrical land 28 for blocking the inlet port 22. An
O-ring 30 around the land 28 improves the sliding seal between the valve spool 20 and the inlet port 22 when the valve spool is moved upwards to its actuating position (not shown).
At its lower end portion the valve spool 20 is formed as a cylindrical valve land 32 for blocking the outlet port 24. A pair of O-rings 34 around the land 32 improves the sliding seal between the valve spool 20 the the outlet port 24 and define a zone therebetween where a cross-bore 36 leads to an axial discharge bore 38. Thus lifting the valve spool 20 until the top 0-ring 34 and the cross-bore 36 clear the outlet port 24 permits the discharge of liquid from the bowl 10.
Formed integraily with the valve spool 20 is a conical valve member 40 which as a taper of the order of 30 and which seats in a complementary tapered seating moulded around the outlet port 24.
When the valve member 40 is seated as shown, the valve spool 20 is in its rest position, to which it is biased by a return spring 42. Thus leakage through the outlet port 24 is prevented primarily by the conical valve member 40 but also by the valve land 32.
Also formed integrally with the valve spool 20 is a second conical valve member 44 which has a taper of the order of 30 and which seats in a complementary tapered seating moulded around the inlet port 22. When the valve spool 20 is lifted to its highest actuated position the valve member 44 is seated completely to prevent passage of the liquid into the bowl 10. In this position of the valve spool 20, a moulded rim 46 immediately beneath the second conical valve member 44 actuates an air valve 48 to admit air into the bowl 10 as the liquid therein empties from the discharge bore 38.
Actuation of the valve spool 20 is by means of a conventional dispensing bar 50.
It will be appreciated from the drawings that the apparatus has the minimum of moving parts and with the exception of the springs can all be made from theremoplastics material by injection moulding. The valve spool 20 is accurately centred in the bowl 10 by virtue of its two ends being a sliding fit in the inlet and outlet ports respectively on opposite sides of the bowl. Moreover the self-centering action of the conical valve members and seats further improves the accuracy of centring of the valve spool at all times.
During the greater part of its lifetime the valve spool 20 is in its rest position as illustrated, where the conical valve member 40 provides an effective liquid seal. When in its extreme actuated or lifted condition the conical valve member 44 provides a similar effective seat. Only for the relatively brief periods of movement of the valve spool 20 do the valve lands 28 and 32 provide the sole sealing of the bowl 10, and their sliding sealing engagement with the inlet and outlet ports is more than sufficient to ensure that there is no loss of liquid during actuation.
In Figure 4 and 5 there is shown, in the assembled condition, an alternative air valve 480 which utilizes conical valve surfaces to achieve a more precise shut-off than the valve 48 of Figures 1 and 2 when in the closed condition. A valve poppet 481 has a stem 482 extending down into the bowl 10.
When the valve spool 20 is in its upper limiting position, its moulded rim 46 contacts the stem to unseat the valve poppet 481 against the bias of resilient moulded mounting web portions 483 of the valve poppet 481. The mounting web portions 483 are held in position in a recess in the cover 12 by a perforated cap 484 which is a friction fit in the recess, and normally maintain the conical surface of the valve poppet 481 in secure engagement with a cooperating conical valve seat 485 moulded into the cover 12.
Claims (9)
1. Apparatus for the gravity dispensation of metered aliquots of a liquid, the apparatus comprising: a bowl having aligned inlet and outlet ports on opposite sides thereof, a valve spool spanning the bowl and having valve lands slidable in the inlet and outlet ports to control liquid flow into and out of the bowl; a first conical valve member fast to the valve spool within the bowl, cooperable with a complementary conical valve seat around the outlet port to define a rest position of the valve spool in which the inlet port is open and the outlet port is closed by both the spool valve land and the first conical valve member, a second conical valve member fast to the valve spool within the bowl, cooperable with a complementary conical valve seat around the outlet port to define a limiting postion of the valve spool in which the outlet port is open and the inlet port is closed by both the spool valve land and the second conical valve member; and actuator means for moving the valve spool from its rest position to its limiting position sequentially to close the inlet port and to open the outlet port to dispense from the outlet port as a single aliquot liquid previously filled into the bowl through the inlet port.
2. Apparatus according to claim 1, wherein the valve land of the valve spool slidable in the inlet port is provided with one or more 0-ring seals to establish a sliding sealing engagement with a cylindrical internal wall of the inlet port during a part oF the actuating movement of the valve spool.
3. Apparatus according to either preceding claim, wherein the valve land of the valve spool slidable in the outlet port is provided with one or more 0- riny seals to establish a sliding sealing engagement with a cylindrical internal wall of the outlet port during part of the actuating movement of the valve spool.
4. Apparatus according to any preceding claim, wherein the valve spool comprises a cross-bore through that valve land which is slidable in the outlet port, communicating with an axial bore which leads to a dispensing nozzle below the bowl.
5. Apparatus according to claim 4, wherein the actuator means comprises a dispensing bar extending laterally from the dispensing nozzle, for engagement with the rim of a container for effecting the actuating sliding movement of the valve spool against the bias of a spring.
6. Apparatus according to claim 5, wherein the spring is located outside of the bowl between a base of the bowl and the top of the dispensing bar.
7. Apparatus according to any of claims 1 to 6, wherein the actuator means comprises an electromagnet actuable to move the valve spool from its rest position.
8. Apparatus for dispensing alcoholic liquids in metered aliquots, substantially as described herein with reference to Figures 1 to 3 of the drawings.
9. Apparatus for dispensing liquids in metered aliquots, substantially as described herein with reference to Figures 1 and 3 and modified by Figures 4 and 5 of the drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB848413792A GB8413792D0 (en) | 1984-05-29 | 1984-05-29 | Dispensing liquids |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8513535D0 GB8513535D0 (en) | 1985-07-03 |
| GB2159496A true GB2159496A (en) | 1985-12-04 |
| GB2159496B GB2159496B (en) | 1987-07-01 |
Family
ID=10561700
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB848413792A Pending GB8413792D0 (en) | 1984-05-29 | 1984-05-29 | Dispensing liquids |
| GB08513535A Expired GB2159496B (en) | 1984-05-29 | 1985-05-29 | Dispensing liquids in metered aliquots |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB848413792A Pending GB8413792D0 (en) | 1984-05-29 | 1984-05-29 | Dispensing liquids |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8413792D0 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2175279A (en) * | 1985-05-09 | 1986-11-26 | John Augustus Gibbs | Improvements in or relating to liquid dispensing devices |
| WO2009118766A1 (en) * | 2008-03-27 | 2009-10-01 | Vitop Moulding S.R.L. | Tap for dosing viscous liquids |
| WO2009143188A2 (en) | 2008-05-19 | 2009-11-26 | Diperna Paul M | Disposable pump reservoir and related methods |
| WO2014082949A1 (en) * | 2012-11-27 | 2014-06-05 | Bacardi & Company Limited | Beverage dispensing system |
| US9962486B2 (en) | 2013-03-14 | 2018-05-08 | Tandem Diabetes Care, Inc. | System and method for detecting occlusions in an infusion pump |
| US10258736B2 (en) | 2012-05-17 | 2019-04-16 | Tandem Diabetes Care, Inc. | Systems including vial adapter for fluid transfer |
| US11135362B2 (en) | 2009-07-30 | 2021-10-05 | Tandem Diabetes Care, Inc. | Infusion pump systems and methods |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8986253B2 (en) | 2008-01-25 | 2015-03-24 | Tandem Diabetes Care, Inc. | Two chamber pumps and related methods |
| US9555186B2 (en) | 2012-06-05 | 2017-01-31 | Tandem Diabetes Care, Inc. | Infusion pump system with disposable cartridge having pressure venting and pressure feedback |
-
1984
- 1984-05-29 GB GB848413792A patent/GB8413792D0/en active Pending
-
1985
- 1985-05-29 GB GB08513535A patent/GB2159496B/en not_active Expired
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2175279A (en) * | 1985-05-09 | 1986-11-26 | John Augustus Gibbs | Improvements in or relating to liquid dispensing devices |
| GB2175279B (en) * | 1985-05-09 | 1989-06-28 | John Augustus Gibbs | Improvements in or relating to liquid dispensing devices |
| WO2009118766A1 (en) * | 2008-03-27 | 2009-10-01 | Vitop Moulding S.R.L. | Tap for dosing viscous liquids |
| US8464917B2 (en) | 2008-03-27 | 2013-06-18 | Vitop Moulding S.R.L. | Tap for dosing viscous liquids |
| WO2009143188A2 (en) | 2008-05-19 | 2009-11-26 | Diperna Paul M | Disposable pump reservoir and related methods |
| EP2276525A2 (en) * | 2008-05-19 | 2011-01-26 | Tandem Diabetes Care, Inc. | Disposable pump reservoir and related methods |
| EP2276525A4 (en) * | 2008-05-19 | 2012-04-04 | Tandem Diabetes Care Inc | Disposable pump reservoir and related methods |
| US11135362B2 (en) | 2009-07-30 | 2021-10-05 | Tandem Diabetes Care, Inc. | Infusion pump systems and methods |
| US11285263B2 (en) | 2009-07-30 | 2022-03-29 | Tandem Diabetes Care, Inc. | Infusion pump systems and methods |
| US10258736B2 (en) | 2012-05-17 | 2019-04-16 | Tandem Diabetes Care, Inc. | Systems including vial adapter for fluid transfer |
| WO2014082949A1 (en) * | 2012-11-27 | 2014-06-05 | Bacardi & Company Limited | Beverage dispensing system |
| US9962486B2 (en) | 2013-03-14 | 2018-05-08 | Tandem Diabetes Care, Inc. | System and method for detecting occlusions in an infusion pump |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8513535D0 (en) | 1985-07-03 |
| GB2159496B (en) | 1987-07-01 |
| GB8413792D0 (en) | 1984-07-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950529 |