A switching mechanism for a multi-function shower head is mounted inside of a shower head body and coordinates with a water pressure relief valve, including a curbing ring, a dividing disk, an under-driving gear set, an impeller, a transferring stand, a drawbar, a blocking and a top cap; with the transferring...http://www.google.de/patents/US7818828?utm_source=gb-gplus-sharePatent US7818828 - Multi-functional shower head
