Abstract: A hydraulic timer mechanism for water irrigation is disclosed to comprise a cylindrical body having an irrigation water entrance and a number of irrigation water exits. The water exits are arranged along the same peripheral circle of the cylindrical body. A water turbine assembly housed inside the cylindrical body for harnessing the power of irrigation water flow is employed to provide rotational power for the mechanism. A speed reduction device is coupled to the water turbine assembly for reducing the rotational speed and increasing the torque produced by the water turbine. A Geneva mechanism is coupled to the speed reduction device for transforming the continuous rotational motion of water turbine assembly into intermittent motion. An energy storage device is used for storing energy provided by the rotation of water turbine that is released in a short period of time.

Abstract: A hydraulic pressure-actuated distribution valve apparatus is disclosed to have a valve body with a water entrance and a number of distribution water exits. The apparatus includes an irrigation water distribution valve mechanism that comprises a one-way clutch means that includes a rotating rod pivotally rotatable inside the valve body and a rotating disk engage with the rotating rod for one-way rotation. The distribution valve apparatus receives irrigation water supply from a pressurized water source through the water entrance and distributes the irrigation water via one of the water exits in an established water path. The apparatus is characterized in that a change in the hydraulic pressure build-up in the pressurized water supply actuates the rotation of the one-way clutch means for changing the water path connection from the entrance to a next of the distribution water exits, so that irrigation water distribution can be switched among several irrigation regions.