| 摘要 |
An improved multi-port water distribution valve is disclosed together with the improved cam mechanism that significantly enhances the efficiency and effectiveness of the valve when used to distribute water to multiple sets of pop-up cleaning heads incorporated into the in-floor cleaning system of a swimming pool. Two forms of prior art distribution valves are disclosed as is the improved cam mechanism that, when used to replace the prior art cam in these devices, significantly improves their performance. Comparative data is provided demonstrating the results achieved with two different prior art valves operated with and without the improved cam. Embodiments of the invention suitable for use in existing six-port and five-port distribution valves are disclosed. |
