| 摘要 |
A liquid admixing device has an operating head (10) for mounting on a container (14) to contain liquid to be admixed and a pipe (24) for a carrier liquid under pressure, the pipe having an upstream tapping (20) into a bore (23) which leads to the container (14), to allow carrier liquid to be transmitted to the storage container. The pipe (24) also has a junction downstream leading from the container to allow the liquid to be admixed with the carrier liquid and thence expelled. An elastomeric membrane (15) is located in the container to separate the carrier liquid from the liquid to be admixed, pressure of the carrier liquid being transmitted via the membrane to force the liquid to be admixed into the pipe (24) via the junction (21). A shut-off valve (25), operable by the liquid pressure differences is provided in the pipe (24) to shut off supply of the carrier liquid once the liquid to be admixed has been exhausted or is running out. <IMAGE> |
