초록 ▼

A part-circle sprinkler head preferably of the pressure compensating quick return type in which the reactant structure on the reversing arm is provided with a coanda-effect surface which aids in moving the reactant structure into the stream. The mechanism for disengaging the reactant structure of th

A part-circle sprinkler head preferably of the pressure compensating quick return type in which the reactant structure on the reversing arm is provided with a coanda-effect surface which aids in moving the reactant structure into the stream. The mechanism for disengaging the reactant structure of the reversing arm from the stream minimizes reliance upon inertia to effect the disengagement function by utilizing a secondary reactant element. The spring mechanism which stably maintains the reversing arm in its inoperative position is interrelated with the reversing arm so that the torque applied thereto diminishes as the reversing arm moves toward its operative position within the stream.

대표청구항 ▼

A part-circle sprinkler head comprising a sprinkler body having an inlet and an outlet, means for mounting said sprinkler body for controlled rotational movement about a generally vertical axis with said inlet in communication with a conduit arranged to communicate a source of water under pressure t

A part-circle sprinkler head comprising a sprinkler body having an inlet and an outlet, means for mounting said sprinkler body for controlled rotational movement about a generally vertical axis with said inlet in communication with a conduit arranged to communicate a source of water under pressure therewith, said outlet being disposed to direct water under pressure communicated with said outlet in a stream flowing therefrom in a direction upwardly and outwardly in generally symmetrical relation to a plane passing through the axis of rotation, an impulse arm pivotally mounted with respect to said sprinkler body for oscillatory movement and having a reactant element thereon, said impulse arm being normally biased into a limiting position wherein said reactant element is disposed within the path of a stream issuing from said outlet and having means thereon operable (1) in response to the energy of a stream issuing from said outlet to move through repeated oscillatory cycles each of which includes an impulse stroke wherein said reactant element leaves the stream and moves away from the latter in one direction and a return stroke wherein said reactant element moves in the opposite direction toward said stream and enters the latter, and (2) during each oscillatory cycle thereof to effect controlled incremental rotational movement of said sprinkler body in one direction, a reversing arm mounted with respect to said sprinkler body for movement between operative and inoperative positions, reversing reactant surface means on said reversing arm engageable by a stream issuing from said outlet when said reversing arm is disposed in said operative position for establishing (1) a resultant body reversing force component acting through said reversing arm on said sprinkler body in a direction tangential to the rotational axis of said sprinkler body for effecting a reversing rotational movement in the opposite direction and (2) a resultant reversing arm moving force component acting on said reversing arm in a direction to move the same toward and into said operative position, and means (1) operable in response to the movement of said sprinkler body through a first predetermined incremental range of movement in said one direction for enabling said reversing arm to move from said inoperative position into said operative position and (2) operable in response to the movement of said sprinkler body through a second predetermined incremental range of movement in said opposite direction for (A) materially reducing the aforesaid resultant arm moving force component acting on said reversing arm while the latter is in said operative position and (B) enabling said reversing arm to move from said operative position after said force component reduction and into said inoperative position.