DIAPHRAGM VALVE ASSEMBLY FOR POOL CLEANER

摘要

A valve assembly including a hollow body 2 housing a tubular flexible diaphragm 7 to provide a passage for fluid flow through the body and forming with the diaphragm on chamber 10 includes means responsive to fluid pressure on the diaphragm to control the fluid flow. In use the diaphragm is caused automatically and repeatedly to contract and expand. This results in a pulsating flow of fluid through the assembly. Such a valve assembly finds particular application in a swimming pool cleaner operating off the reduced pressure provided by the pump for the conventional pool filtration plant. In the embodiment of Fig. 1 a rigid member has flaps 15, 16 which alternately close inlets 3, 9 to the main flow path and chamber 10 respectively. Further embodiments described with reference to Figs. 2-9 include modifications wherein the chamber 10 is sealed.