Abstract: An oscillating wave type lawn sprinkler having a spray tube that is angularly oscillated about its axis by a spray tube linkage assembly that is driven by a water-actuated motor. The linkage assembly is coupled to the spray tube by a releasable coupling that disengages whenever the spray tube is subjected to an external force which exceeds a predetermined magnitude, thereby permitting the spray tube to angularly deflect out of its normal alignment. Normal alignment of the spray tube is restored by manually rotating the spray tube until the coupling is again engaged.

Abstract: An impact type rotary sprinkler is disclosed including a rotatable body and nozzle, an impact arm which oscillates responsive to the kinetic energy of the fluid discharge stream and a primary spring which stores the rotational energy of the oscillating arm rotating to impact against the housing and impart an increment of rotation thereto. The sprinkler is adapted for uniform water distribution over a range of discharge stream kinetic energies in excess of design limits by the provision of a secondary spring which is operable when the impact arm rotates in excess of a predetermined arc due to excessive rotational force being applied to the impact arm. The secondary spring assists the primary spring in urging the impact arm in the opposite direction.

Abstract: A rotary irrigation sprinkler having a rotating body carrying nozzle arms and nozzles for ejecting water streams and including a reaction vane adapted to control and reduce the speed of rotation of the sprinkler to increase the useful life of the sprinkler and also increase the effective area irrigated.

Abstract: A trickle-flow irrigation valve of the type which is installable through the wall of a garden hose, and having a pressure chamber with an inlet passage from the hose and an outlet passage through a wall of the chamber in which are also formed a shallow channel and an outlet groove in the channel, communicating with the outlet passage. A flat, resilient valve element covers the outlet passage and a substantial portion of the groove and channel. The resilient valve element allows relatively high-volume, flushing flow when water is first received in the chamber, but deforms to the shape of the channel as supply pressure builds up, thus restricting flow to the outlet groove and providing a substantial pressure drop. A high supply pressure will force the valve element into the groove itself, to some degree, and a pressure regulating effect is thereby obtained.

Abstract: For use in a sprinkler system a pressure and flow regulation device comprising a snap acting valve which includes a movable valve closure having a spring biasing the valve closure toward a closed position and a diaphragm having a surface disposed to be acted upon by inlet water pressure to urge the valve closure to an open position against the bias of the spring, only when a predetermined inlet pressure is reached, and a pressure regulator constructed integrally with the snap acting valve for automatically regulating the pressure of water supplied to a sprinkler to a selected level.