Patent ID: 8636228

Claim:
An embedded rotary sprinkler, comprising: an upper tube having a first upper receiving chamber, an upper independent chamber, a top receiving chamber formed above said first upper receiving chamber, a through hole formed between said first receiving chamber and said top receiving chamber, wherein said upper tube defines an upper water path, and further comprises a rod moveably mounted to said through hole, and a water seal ring mounted between said rod and a side wall of said through hole; a lower cover; a lower tube having a first lower receiving chamber, a second independent chamber, a lower receiving space, and defining a lower water path, wherein said upper tube and said lower tube are arranged to be connected with each other to allow said first upper receiving chamber and said first lower receiving chamber to communicate with each other to form a first independent chamber, while said upper water path and said lower water path are arranged to communicate with each other to form an integral water path; a lower independent chamber communicating with said first independent chamber, wherein said embedded rotary sprinkler defines an integral water path communicating with said upper independent chamber and said lower independent chamber for forming a circuitous path of water in said embedded rotary sprinkler; and a protruded axle formed on an outer bottom of said lower cover, a compress spring and a washer slidably mounted on said protruded axle, and a bottom tube connected to a bottom portion of said lower tube, wherein said lower cover has a plurality of through holes formed on a bottom portion thereof, wherein said bottom tube has a buffer tank formed on a top thereof and defines a bottom tube hole, wherein a bottom hole linking to said bottom tube hole is formed to a bottom of said buffer tank, wherein a plurality of peripheral holes is formed to a peripheral of said buffer tank between said bottom tube hole, wherein said washer is capable of sealing said bottom hole of said buffer tank, while water supplied from said peripheral holes of said bottom tube being sprinkled out through said upper independent chamber, excess water pressure pushes said washer so that excess pressurized water flows into said buffer tank so as to be drained through said lower independent chamber which communicates with said first independent chamber.