Reusable and accurately pre-measured liquid dispenser

Abstract

A liquid dispenser that is suitable for metering pre-measured quantities of liquid from a rigid wall or deformable walled container. The liquid dispenser comprises a nozzle (16) which attaches to the container at one end and attaches to a dispensing chamber (14) at the other end. The dispensing chamber (14) has an opening (24) at its inlet end which juxtaposes with a disk (21) at the discharge end of the nozzle. The nozzle (16) has a central aperture (19) which terminates at the discharge end with inwardly projecting arms (22) which support the disk (21). The seating of the chamber on the end of the nozzle brings the disk (21) into juxtaposition with the opening (24) to control the flow of liquid from the container to the dispensing chamber (14). When the dispensing chamber (14) is fully engaged with the discharge end of the nozzle (16), the opening (24) in the dispensing chamber interlocks with the disk (21) on the nozzle to prevent the liquid from entering the dispensing chamber. When the dispensing chamber (14) is retracted from the nozzle (16) and the container is inverted, the liquid passes from the central aperture (19) around the disk (21) and into the dispensing chamber (14). Once the dispensing chamber (14) is filled, the chamber is pushed down onto the nozzle (16) so that the disk (21) engages with the opening (24) which stops the flow of liquid. At this point the container holds a pre-measured charge of liquid which may be stored for later use or dispensed immediately by removing the outer cap (15) from the dispensing chamber (14).