Importance

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Abstract

An impact drive sprinkler including a body defining a nozzle arranged to provide a stream of pressurized liquid; spring loaded stream deflector and hammer apparatus for intermittently engaging the stream and providing in response to the engagement a force causing intermittent rotation of the body about a rotation axis; and apparatus for selectably limiting the amplitude of motion of the deflector and hammer apparatus and thus determining the direction of rotation of the body and the overall range of the resulting spray. The selectably limiting apparatus has first and second orientations corresponding to rotation of the sprinkler in respective forward and return directions and comprises a first hammer engagement surface that is engaged when the sprinkler is rotating in the forward direction. The first hammer engagement surface is arranged such that hammer engagement therewith retains the apparatus for selectably limiting in the first orientation.

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First Claim