GB1577910A

GB1577910A - Liquid dispensing apparatus

Info

Publication number: GB1577910A
Application number: GB3252079A
Authority: GB
Original assignee: Individual
Current assignee: Individual
Priority date: 1977-01-19
Filing date: 1977-01-19
Publication date: 1980-10-29

Description

(54) IMPROVEMENTS IN OR RELATING TO LIQUID DISPENSING APPARATUS (71) We, PETER DONALDSON of 43, Hawthorn Way, Storrington, Sussex, and DAVID WALTER MOATE of 40, Curzon Street, London, W1Y 7RF, both British subjects, do hereby declare the invention for which we pray that a patent may be granted to us and the method which it is to be performed to be particularly described in and by the following statement: This invention concerns improvements in or relating to apparatus for dispensing liquids of the kind including a measuring chamber adapted to be filled with liquid and valve means adapted in operation thereof to prevent further liquid entering the chamber and to permit discharge of the contents already held. Apparatus of this kind is used where it is desired to dispense liquids in discrete quantities whose volume is a fixed measure.

A particular application of such apparatus is to be found in wide-spread use in public houses, hotels, clubs and like establishments for the dispensing of spirits and like beverages. Many such devices are sold under the Registered Trade Mark "Optic". Equally such devices are used in cafes, restaurants and the like for dispensing quantities of concentrated beverages such as orange or lemon squash in which a fixed quantity is required for dilution with water to make up a beverage of the correct strength.

It is a general aim of this invention to provide improved liquid dispensing apparatus of the kind described, and the invention is particularly although not exclusively applicable to spirit measuring and dispensing devices as hereinbefore mentioned.

According to the invention there is provided apparatus for dispensing liquid in fixed measured quantities comprising a measuring chamber having an inlet port to allow liquid to enter the chamber and an outlet port to allow liquid in the chamber to leave, a tubular valve member extending into the chamber through the outlet port and having one or more lateral apertures, the valve member being adapted on upward actuation thereof in normal operation to close said inlet port and move said aperture (s) into said chamber to open said outlet port and permit liquid in the chamber to flow out through said tubular valve member, and a sealing ring disposed around said tubular valve member above said aperture(s) in normal operation in sliding sealing engagement with said outlet port during initial actuation of said valve member to prevent leakage therethrough from said measuring chamber.

Preferably the apparatus includes a further sealing ring disposed around said valve member below said aperture(s) in sliding sealing engagement with said outlet port.

Preferably said valve member includes an air valve disposed in said valve member at or near its end in the chamber adapted on actuation of the valve member to open into an upper region of the measuring chamber to permit air to enter the chamber to displace liquid as it leaves the chamber. The provision of the air valve at or near the end of the valve member enables air to smoothly replace the liquid in the chamber as it leaves, and the air inlet for the valve can be disposed within the valve member and be downwardly open to prevent settling dust or dirt from entering.

The valve member will preferably be resiliently biased to close the outlet port.

Said one or more lateral apertures are preferably generally triangular in shape.

A number of different constructions for the air valve are possible provided it operates in the aforesaid manner, i.e. be opened on actuation of the valve member. Furthermore one or more parts of the air valve may co-operate with said inlet port to close said port as hereinbefore described. Thus the air valve may comprise a resiliently mounted valve button adapted on actuation of the valve member to sealingly abut against the outlet port. The valve button may further include a valve surface cooperating with a valve seat on said valve member to form said air valve, or in a presently preferred arrangement the button co-operates with a resiliently mounted air valve member to open said air valve after said outlet port has been closed.

For the preferred application of dispensing beverages the measuring chamber will preferably be made wholly or partly transparent and may include means for receiving in mounting engagement an inverted bottle.

For this application a preferred and useful feature is the provision of a pivotally mounted operating member adapted to pivot on engagement with the side wall of a cup, glass or like container and serving to operably actuate said valve member, as opposed to the hitherto used upwardly slidingly moved operating member. This enables the side wall of, say, a glass to be used for operating the apparatus rather than the rim thereof.

To reduce the effort required to manually actuate the valve member there may be provided electrical motor with associated gearing if necessary serving to actuate the valve member. Such motor would generally be connected to a switch operated by a pivotally mounted operating member as aforesaid.

In order that the invention may be readily understood an embodiment thereof will now be described by way of example with reference to the accompanying drawings in which: Figure 1 is a side elevation, partly in section, of a beverage dispensing apparatus not in accordance with the present invention but illustrating preferred features thereof.

Figure 2 is a view of apparatus on Arrow A, Figure 3 is a longitudinal sectional view of the measuring chamber and valve member, Figure 4 is a sectional view of an embodiment of the invention.

As shown in the drawings, the beverage dispensing apparatus comprises a measuring chamber 1 made of transparent plastics, a tubular valve member 2, a valve operating member 3, mounting bracket 4, and bottle mounting means 5. The workings of the device are encased in a two-part housing 6.

Referring in particular to Figure 3, the measuring chamber 1 which is in two parts, a lower bowl part 7 and an upper closure 8, includes an inlet port 9 and an outlet port 10. The outlet port 10 is formed as a tubular extension of the measuring chamber and provides a substantial inner bearing surface for vertical sliding movement of the valve member 2 as will hereinafter be described.

This bearing surface is considerably longer than that in existing devices and thus provides improved support against possible pivotal movement of the valve member 2.

At the upper end of the valve member 2 is mounted an air valve comprising a valve housing 11 in which is disposed a valve button 12 urged into resilient sealing engagement with the housing by spring 13 acting on washer 14. Washer 14 provides an upper mounting for air pipe 15 which extends through valve member 2 and has its outlet 16 disposed adjacent the outlet 17 of the valve passage.

On upward movement of the valve member 2 which is resiliently biased downwardly by spring 18 acting on lifting collar 19, inlet aperture 9 is closed by washer 20 mounted on the valve button 12. Continued upward movement of the valve member causes valve button 12 to move downwardly against spring 13 to open the upper end of the air passage and lateral ports 21 come into communication with the measuring chamber 1 to allow discharge of its contents out through port 17 into the waiting drinking container below (not shown).

When all the contents have left the measuring chamber the valve member 2 is allowed to return under the force of spring 18 to the position shown where the ports 21 are closed, the air valve is closed, and the inlet port 9 is open to allow liquid to flow into and fill the measuring chamber 1.

It is a significant feature of the device that the outlet of the air passage faces downwardly and is disposed at the lower end of the valve member. In this way dust or other dirt falling around the device cannot enter the air passage and thereby cause contamination of the beverage.

In an alternative embodiment not illustrated, the valve button 12 may be replaced by a ball bearing and the hollow inside the valve housing 11 modified to suit the ball. In this way good sealing of the air valve and the inlet port 9 may be obtained. It will be seen that the vertical movement of the valve member 2 is obtained by pivotally moving valve operating member 3. This is a significant advantage over known devices where the drinking container is applied to arms mounted directly on the valve member 2 which then requires an upward force to operate the valve member. In the embodiment shown however the valve operating member 3 includes a v-shaped lower portion 22 adapted to receive a drinking container.

Pivotal movement of the operating member (it is shown in the drawings mid-way in its stroke) causes the connecting link 23 to pivot anti-clockwise and to raise the valve member 2 by means of lifting collar 9. Thus the rim of, for example, a glass from which a beverage had already been consumed does at no time come into contact with the device.

Turning now to Figure 4 there is shown an embodiment of the invention of the invention having a somewhat modified air valve and also being provided with an electrical motor for lifting the valve member 2. Like numerals to those used in Figures 1 and 3 are used in Figure 4 and only those parts which differ substantially from the apparatus of Figures 1 to 3 will be described.

The air valve in this embodiment comprises a valve member 24 having an elastomeric sealing member 25 urged into engagement with a valve seat 26 by means of a spring 27 supported at its other end on a crosspiece 28; this valve is adapted to be opended by plunger 29 in the following way. When valve member 2 is lifted, the sealing washer 20 on plunger 29 will first come into contact with the inlet port valve seat 9. Continued upward movement of the valve member 2 causes the plunger to ride down against the resilience of biasing spring 30 which is supported at its other end on air valve member 24, until the axial force on member 24 overcomes the resilience of spring 27 to open the air valve.

At this time, the lateral apertures 21 are in communication with the interior of measuring chamber 1 and the liquid therein will flow out through said apertures whilst air flows into the upper region of the chamber through the air valve. The apertures are made triangular in shape, as shown, in order to allow further passage of air through said apertures whilst the liquid flows out through the lower parts.

Whilst upward movement of the valve member 2 could be affected by a mechanical linkage in the Figure 1 embodiment, in this case an electrical motor 31 is provided to perform such upward movement.

On actuation of the member 3 in the clockwise direction, a micro-switch 32 is actuated causing the motor 31 by means of pinion 33 and gears 38 to rotate the lifting cam 34 to lift the arm 23, thereby raising the member 2. A control cam 35 actuates another micro-switch 37 once the motor has started to lock the electric circuit to the motor in the closed condition until such time as the depression 36 comes into registry with micro-switch 37 as shown, whereupon the cycle will terminate.

It should be noted that in this embodiment no air pipe 15 as was provided in the first embodiment is necessary, the tubular valve member 2 itself having been found sufficient to permit discharge of liquid as well as entry of air.

It should be noted in this embodiment that sealing rings 40,41 are provided around the tubular valve member 2 in respective receiving peripheral grooves for sliding sealing engagement with port 10. Ring 40 is disposed above the lateral apertures 21 and is most effective in preventing leakage of the beverage from the chamber 1 during initial actuation of the valve member 2. Lower ring 41 serves in a likewise manner to prevent liquid from passing downwardly between valve member 2 and port 10.

As an alternative to providing a cam and lifting lever for actuating the operating member 2, the motor 31 could be arranged to rotate the operating member about its longitudinal axis, the member being formed with a coarse spiral thread in which engages one or more lugs provided on the tubular extension of the measuring chamber such that rotation of the operating member causes it to rise. Equally, the tubular extension could be provided with a thread and one or more lugs be formed on the operating member with the same result.

Again, as an alternative to a rotational electric motor, a solenoid could be used for effecting vertical movement of the operating member, either acting directly on said member or an extension thereof, or through a mechanised linkage.

Whether a solenoid or a rotational motor is used, it will be necessary to provide electric power to the apparatus. For safety reasons a low voltage, say 9 or 12 volts will generally be used, and this can conveniently be led to the apparatus by means of terminals mounted in the mounting bracket 4 which engage with registering terminals in a wall or shelf mounting for the apparatus. In this way the power is automatically disconnected from the apparatus when dismounted for changing a bottle with practically no inconvenience to bar staff.

Attention is hereby directed to our copending applications Nos. 43846/75 (Serial No. 1577908) and 32519/79 (Serial No.

1577909).

WHAT WE CLAIM IS 1. Apparatus for dispensing liquid in fixed measured quantities comprising a measuring chamber having an inlet port to allow liquid to enter the chamber and an outlet port to allow liquid in the chamber to leave, a tubular valve member extending into the chamber through the outlet port and having one or more Iteral apertures, the valve member being adapted on upward actuation thereof in normal operation to close said inlet port and move said aperture(s) into said chamber to open said outlet port and permit liquid in the chamber to flow out through said tubular valve member, and a sealing ring disposed around said tubular valve member above said aperture(s) in normal operation in sliding sealing engagement with said outlet port during initial actuation of said valve member to prevent leakage therethrough from said

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Claims

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at no time come into contact with the device.

Turning now to Figure 4 there is shown an embodiment of the invention of the invention having a somewhat modified air valve and also being provided with an electrical motor for lifting the valve member 2. Like numerals to those used in Figures 1 and 3 are used in Figure 4 and only those parts which differ substantially from the apparatus of Figures 1 to 3 will be described.

The air valve in this embodiment comprises a valve member 24 having an elastomeric sealing member 25 urged into engagement with a valve seat 26 by means of a spring 27 supported at its other end on a crosspiece 28; this valve is adapted to be opended by plunger 29 in the following way. When valve member 2 is lifted, the sealing washer 20 on plunger 29 will first come into contact with the inlet port valve seat 9. Continued upward movement of the valve member 2 causes the plunger to ride down against the resilience of biasing spring 30 which is supported at its other end on air valve member 24, until the axial force on member 24 overcomes the resilience of spring 27 to open the air valve.

At this time, the lateral apertures 21 are in communication with the interior of measuring chamber 1 and the liquid therein will flow out through said apertures whilst air flows into the upper region of the chamber through the air valve. The apertures are made triangular in shape, as shown, in order to allow further passage of air through said apertures whilst the liquid flows out through the lower parts.

Whilst upward movement of the valve member 2 could be affected by a mechanical linkage in the Figure 1 embodiment, in this case an electrical motor 31 is provided to perform such upward movement.

On actuation of the member 3 in the clockwise direction, a micro-switch 32 is actuated causing the motor 31 by means of pinion 33 and gears 38 to rotate the lifting cam 34 to lift the arm 23, thereby raising the member 2. A control cam 35 actuates another micro-switch 37 once the motor has started to lock the electric circuit to the motor in the closed condition until such time as the depression 36 comes into registry with micro-switch 37 as shown, whereupon the cycle will terminate.

It should be noted that in this embodiment no air pipe 15 as was provided in the first embodiment is necessary, the tubular valve member 2 itself having been found sufficient to permit discharge of liquid as well as entry of air.

It should be noted in this embodiment that sealing rings 40,41 are provided around the tubular valve member 2 in respective receiving peripheral grooves for sliding sealing engagement with port 10. Ring 40 is disposed above the lateral apertures 21 and is most effective in preventing leakage of the beverage from the chamber 1 during initial actuation of the valve member 2. Lower ring 41 serves in a likewise manner to prevent liquid from passing downwardly between valve member 2 and port 10.

As an alternative to providing a cam and lifting lever for actuating the operating member 2, the motor 31 could be arranged to rotate the operating member about its longitudinal axis, the member being formed with a coarse spiral thread in which engages one or more lugs provided on the tubular extension of the measuring chamber such that rotation of the operating member causes it to rise. Equally, the tubular extension could be provided with a thread and one or more lugs be formed on the operating member with the same result.

Again, as an alternative to a rotational electric motor, a solenoid could be used for effecting vertical movement of the operating member, either acting directly on said member or an extension thereof, or through a mechanised linkage.

Whether a solenoid or a rotational motor is used, it will be necessary to provide electric power to the apparatus. For safety reasons a low voltage, say 9 or 12 volts will generally be used, and this can conveniently be led to the apparatus by means of terminals mounted in the mounting bracket 4 which engage with registering terminals in a wall or shelf mounting for the apparatus. In this way the power is automatically disconnected from the apparatus when dismounted for changing a bottle with practically no inconvenience to bar staff.

Attention is hereby directed to our copending applications Nos. 43846/75 (Serial No. 1577908) and 32519/79 (Serial No.

1577909).

WHAT WE CLAIM IS 1. Apparatus for dispensing liquid in fixed measured quantities comprising a measuring chamber having an inlet port to allow liquid to enter the chamber and an outlet port to allow liquid in the chamber to leave, a tubular valve member extending into the chamber through the outlet port and having one or more Iteral apertures, the valve member being adapted on upward actuation thereof in normal operation to close said inlet port and move said aperture(s) into said chamber to open said outlet port and permit liquid in the chamber to flow out through said tubular valve member, and a sealing ring disposed around said tubular valve member above said aperture(s) in normal operation in sliding sealing engagement with said outlet port during initial actuation of said valve member to prevent leakage therethrough from said

measuring chamber.
2. Apparatus according to claim 1 including a further sealing ring disposed around said valve member below said aperture(s) in sliding sealing engagement with said outlet port.
3. Apparatus according to claim 1 or 2 said aperture(s) being generally triangular in shape.
4. Apparatus according to claim 1, 2 or 3 including a pivotally mounted operating member adapted to pivot on engagement with the said wall of a cup, glass or like container and serving to operably actuate said valve member.
5. Apparatus according to claim 4 said operating member including a V-shaped lower portion adapted to receive a drinking container.
6. Apparatus according to any of the preceding claims including a air valve disposed in said valve member at or near its end inthe chamber adapted on actuation of the valve member to open into an upper region of the measuring chamber to permit air to enter the chamber to displace liquid as it leaves the chamber.
7. Apparatus according to claim 6 said air valve comprising a resiliently mounted valve button sealingly abutting against the inlet port on actuation of the valve member.
8. Apparatus according to claim 7 said air valve further including a resiliently mounted air valve member arranged to be engaged and opened by said valve button after said inlet port has been closed.
9. Apparatus according to claim 4 or any of claims 5 to 8 where dependent on 4 including an electric motor serving to drive said valve member in its inlet port closing direction said operating member controlling a switch for the motor.