A sand-proof sprinkler mechanism has a base. A housing and a connecting platform are provided on the base. A hose is rotatably connected between the housing and the connecting platform. The housing has a water outlet, a housing inner chamber and a water inlet that are in communication with the hose. The housing includes an impeller transmission member and a transmission device that is drivingly connected to the impeller transmission member and the hose. The housing further has a sealing chamber for mounting the transmission device. A water baffle is provided at an opening of the sealing chamber for covering the sealing chamber. The above structure prevents particles from entering and getting stuck.

A sprinkler water flow switching device is assembled in a movable seat of the water sprinkler with a partition dividing into an impeller chamber and a gear chamber. The partition is provided with a first water channel and a second water channel for directing water from the gear chamber to the impeller chamber, so as to control the direction of rotation of the impeller in the impeller chamber. The water flow switching device includes a projection member, a seesaw plate and a driving lever in the gear chamber; the driving lever can oscillate and actuate the seesaw plate to move on the projection member, then the seesaw plate can move as a seesaw to selectively close the water inlet of the first water channel or the second water channel, thereby changing the rotation direction of the impeller and the water spray direction.

An improved sprinkler structure provides a fastener of a positioning ring for elastically fastening a water guiding pipe. A fastening dot of the positioning ring can engage with a tooth of a water inlet connector effectively so that the water guiding pipe does not detach easily. Water outlet direction of a first water passage and a second water passage is tangent with an impeller; therefore, when water is let out, the water pressure will push the impeller evenly to make the sprinkler to rotate evenly and smoothly. A push rod of a water inlet switching device is pivotally connected with a connecting rod. When the connecting rod is pushed, because a clearance is present between the connecting rod and a connecting groove, the force received by the connecting rod is partially converted into momentum of displacement when the push rod wiggles.

An irrigation sprinkler can include an outer case and a riser extendible from the outer case by water pressure. A nozzle can be rotatably mounted at an upper end of the riser. A water inlet can connect the sprinkler to a water source. A turbine may be mounted in the riser for rotation by water entering a lower end of the riser. A gear train reduction can be mounted in the riser. A gear driven coupling mechanism mounted in the riser may couple the gear train reduction and the nozzle. A pressure regulator can be mounted inside the outer case at the water inlet.

The present invention is directed to a rotor or sprinkler that allows its watering arc to be rotated, increased, or decreased by user-rotation of the sprinkler's rotating nozzle base.

The present invention is directed to a rotor or sprinkler that allows its watering arc to be rotated, increased, or decreased by user-rotation of the sprinkler's rotating nozzle base.

A water flow metering device for use as a handheld or ground-based sprinkler includes a device body having a water inlet, a water distribution head in fluid communication with the device body, and a flow pattern selector. The flow pattern selector is coupled to the water distribution head and meters the amount of water sprayed onto the surrounding area. The flow pattern selector includes indicia that provide flow rate information to an operator. A pressure control valve regulates the flow rate in accordance with the information provided by the flow pattern selector. The water flow metering device may also include a timing mechanism having a timer which closes the water supply after a set period of time. A pressure transducer or other flow rate measuring device may allow the timer to operate the device for a predetermined amount of water distribution in inches per hour.

An irrigation sprinkler includes a main valve mounted in the lower end of an outer housing for controlling the flow of water through an inlet of the outer housing. A pilot valve is operatively coupled to the main valve for turning the main valve ON and OFF. A solenoid is operatively coupled to the pilot valve for opening and closing the pilot valve. A service valve is operatively coupled between the main valve and the pilot valve. The service valve is manually actuable from an AUTO state to allow normal operation of the sprinkler and to an OFF state to allow repair or replacement of the pilot valve or solenoid without having to manually shut OFF a supply valve that is coupled to the inlet of the outer housing through a supply pipe.

An improved sprinkler structure provides a fastener of a positioning ring for elastically fastening a water guiding pipe. A fastening dot of the positioning ring can engage with a tooth of a water inlet connector effectively so that the water guiding pipe does not detach easily. Water outlet direction of a first water passage and a second water passage is tangent with an impeller; therefore, when water is let out, the water pressure will push the impeller evenly to make the sprinkler to rotate evenly and smoothly. A push rod of a water inlet switching device is pivotally connected with a connecting rod. When the connecting rod is pushed, because a clearance is present between the connecting rod and a connecting groove, the force received by the connecting rod is partially converted into momentum of displacement when the push rod wiggles.

A sprinkler can include a turbine, a nozzle, a gear drive and a reversing mechanism. The gear drive and the reversing mechanism rotatably couple the turbine and the nozzle. The gear drive can shift a direction of rotation of an output stage that is coupled to the reversing mechanism. The reversing mechanism can include a shift member coupled with the gear drive.