CONTAINER FOR LIQUIDS

Abstract: A container (11) for liquids has a spout with an air bleed (10) for improving the ease of pouring of the liquids. The container has a retractable nozzle the outlet end of which has a double wall (3, 4) defining an annular space. The annular space is open at both ends (top, 7) and when the nozzle is fully extended for pouring allows liquid flow through the annular space from the air bleed. The air bleed may communicate with the main body of the container via its hollow handle.

Description: CONTAINER FOR LIQUIDS This invention relates to a container from which liquids, or free flowing solids, may be poured. It relates particularly to a container for dispensing relatively small quantities of liquids by hand e.g. containers for lubricating oils or liquid detergents. As liquid is poured, air must come in to replace the liquid and if the air is not admitted in a controlled fashion the pouring can become erratic, with the liquid coming out in surges and slugs. Various proposals have been made to control the admission of air and prevent surging. An air vent separate from the pouring spout is one solution, but since the container has to be liquid tight its air vent has to be sealable separately from the spout. Other solutions involve admitting the air through the pouring spout but controlling the liquid flow so that there is always air space above the liquid stream being poured. These solutions normally involve the spout having some form of neck below the spout outlet and a channel below the spout but above the neck directing the air into the free space in the container. Examples of this are shown in US Patent No. 4412633, GB Patent Application No. 2098572A and PCT Application 87/01677. Some liquid containers also have a retractable nozzle fitting within the spout which can be pulled out to assist pouring and pushed back in after use. One embodiment described in PCT Application 87/01677 has such a retractable nozzle. In this embodiment, any liquid flowing down the outside of the nozzle collects in a well above the neck of the spout and can return into the container via the air bleed. However, with the air bleed-retractable nozzle design liquid flowing down the outside of the nozzle is not the only, or necessarily the most pressing problem. If the container is not held vertically the liquid may bleed through the handle and dribble from the end of the container instead of through the nozzle. The present invention is concerned with an improved retractable nozzle for a container for liquids which obviates this difficulty with sideways pouring. According to the present invention a retractable nozzle for a container for liquids having a spout with an air-bleed is characterised in that the outlet end of the nozzle has a double wall enclosing an annular space, the annular space being open at both ends so that fluid flow can occur through the space from the air bleed. The nozzle can be held retractably within the spout in any convenient known way. The double wall of the nozzle should not extend down the whole length of the nozzle but should extend down at least the length of the portion extending beyond the spout when in the pouring position. The outside diameter of the double walled portion of the nozzle may be slightly larger than the single-walled portion so that there is a gap between the inside of the spout and the outside of the single-walled portion of the nozzle, this gap providing a passage for air from the annular space to the air bleed channel. The air inlet end of the annular space can simply be flush with the liquid outlet end of the nozzle. At the other end, the annular space can communicate with the gap and the air bleed channel by two or more holes in the base of the outside wall. The outside wall of the double wall may have a projection on its outside near the base as a form of seal with the inside of the spout, so that any liquid flowing down the outside of the nozzle does not enter the gap and air bleed channel. The present invention includes a container for liquids having a retractable nozzle as described above. The invention is illustrated by the accompanying drawings in which:- Figures 1A and IB are, respectively, a section through and a view of a nozzle according to the present invention, and Figures 2A and 2B show the nozzle of Figure 1 in place in the spout of a container in, respectively, the retracted and extended positions. Figure 3 shows a perspective view of a container with handle having a retractable nozzle. In Figure 1, the nozzle is generally cylindrical. At its top it is double walled with inside wall 3 and outside wall 4. The annular space enclosed by the walls is open at the top. Below the double-walled portion of the nozzle is a portion with a single wall 6. The top of this wall 6 seals the bottom of the annular space but there are outlets 7 in the base of the outside wall 4 so that the annular space is, in effect, open at both ends. There may be any convenient number of outlets, preferably four. The diameter of the single wall 6 is slightly less than that of the double-walled portion. At the bottom of the single wall are barbs 8 designed to hold the nozzle within the spout of a container. In Figure 2, the spout of a container has a screw-threaded top portion 9 to hold a cap, and a projecting portion 10 forming an air bleed channel. The spout extends from the main body 11 of the container. Figure 2 shows how the nozzle is held within the spout. In the retracted position of Figure 2A the downward movement of the nozzle is limited by the base of the double-walled portion abutting against the base of the air bleed channel projection 10. In the extended position of Figure 2B, barbs 8 limit the upward movement of the nozzle by abutting against the main body 11 of the container. The nozzle and the container may be made of any suitable material, e.g. plastic or metal, and if the nozzle material is slightly flexible, the nozzle can simply be inserted during manufacture by pressure to force the barbs through the spout. Figure 2B shows that, with the nozzle in the extended position, there is an air passage through the annular space, through outlets 7, and through the gap 12 between the spout and the single-walled portion 6 of the nozzle to the air-bleed channel 10. Channel 10 can communicate with the main body of the container in any convenient way, e.g. through a hollow handle of the container. Exterior projection 5 on the double-walled portion of the nozzle abuts against the inside of spout 9 when the nozzle is extended so that any liquid flowing down the outside of the nozzle does not enter the air bleed channel. Even if the container is held so that liquid is poured out of the nozzle with a sideways component, the air passage formed by the annular space will not be totally blocked by liquid, so that air can enter the container and prevent any surging of the liquid stream.

Claims: Claims 1. A container comprising a thin walled chamber with a spout having an air bleed and a retractable nozzle characterised in that the outlet end of the nozzle has a double wall defining an annular space therebetween, the annular space also being open at both ends whereby, in use, liquids in the chamber may flow from the air bleed and through the annular space. 2. A container according to claim 1 in which the air bleed comprises a space between the nozzle and the wall of the spout. 3. A container according to claim 1 or claim 2 in which the air bleed communicates with the hollow handle of the container. 4. A container according to any of the preceding claims in which the double wall of the nozzle and the outlet of the spout are in sealing contact when the retractable nozzle is extended. 5. A container according to claim4 in which the double wall of the nozzle has an external projection in sealing contact with the spout when the retractable nozzle is extended. 6. A container according to any of the preceding claims in which the retractable nozzle has retaining barbs. 7. A container according to claim 6 in which the nozzle can be inserted into the container by forcing the barbs through the spout. 8. A container according to any of the preceding claims in which the annular space communicates with the air bleed by means of one or more outlet holes. 9. A retractable nozzle for use with a container as claimed in any of claims 1 to 8.

Inventors: CLUBB DAVID COLIN, HANFF MICHAEL, CLUBB, DAVID, COLIN, HANFF, MICHAEL
Applicants: BRITISH PETROLEUM CO PLC, THE BRITISH PETROLEUM COMPANY PLC
Application year: 1988
Main classification: B65D25
IPC codes: B65D25