Patent ID: 8746592

Claim:
An improved sprinkler, said sprinkler includes a water switching device to change a water flow direction to control a blade and a direction of a gear set to oscillate a movable set, said sprinkler comprising: a set of an upper divider and a lower divider positioned within an interior of said movable set and dividing the interior of the movable set into a water control chamber and a gear chamber, said water control chamber including the water switching device therein, said gear chamber includes the gear set therein, wherein the movable set includes a bottom end, said bottom end of the movable set includes a connecting pipe with a stationary gear section, said stationary gear section meeting with a gear within the gear set, wherein the gear set is completely enclosed in the gear chamber, wherein water flowing inside the connecting pipe is accessible to the water control chamber only to direct water to the water control chamber, and wherein the upper divider and the lower divider comprise a set of a matching rib and a receiving groove that form a water filtering space to enable the water from the control chamber to flow through the filtering space before seeping through the gear chamber while filtering out larger or coarser particles in the water, assisting in cooling and lubrication of the gear set, preventing frictional damages between gears in the gear set and maintaining a balance in the water pressure and temperature between water in the water control chamber and the gear chamber.