초록 ▼

A pop-up rotary sprinkler with adjustable arc limits has an arc adjustment tool engaging member slideably mouted in a guide sleeve in the head of the sprinkler that has a progressively narrowing diameter. The member includes a radially expandable and contrastable collet at the upper end thereof and

A pop-up rotary sprinkler with adjustable arc limits has an arc adjustment tool engaging member slideably mouted in a guide sleeve in the head of the sprinkler that has a progressively narrowing diameter. The member includes a radially expandable and contrastable collet at the upper end thereof and a pinion gear at a lower end thereof for engaging the teeth of a bull gear for setting at least one of the end limits of the desired arc. When the tool is inserted into the member, it moves downwardly, and a pair of flanges of the tool are locked into slots in the collet. The tool cannot be removed until it is pulled upwardly to permit the collet to expand radially to allow the flanges of the tool to be pulled past a ring at the upper end of the collet.

대표청구항 ▼

[ I claim:] [1.] A sprinkler, comprising:a housing having an outlet end;a head including a nozzle for ejecting a stream of water;means for mounting the head at the outlet end of the housing for angular rotation about vertical axis;means mounted in the housing for driving the head about the axis;arc

[ I claim:] [1.] A sprinkler, comprising:a housing having an outlet end;a head including a nozzle for ejecting a stream of water;means for mounting the head at the outlet end of the housing for angular rotation about vertical axis;means mounted in the housing for driving the head about the axis;arc adjustment means mounted in the housing for pre-setting at least one of a pair of end limits of rotation of the head;means for causing the rotation of the head to reverse a direction of rotation thereof when a rotational position of the head reaches each of the end limits so that the stream of water will travel through a predefined angular sector; andan arc adjustment tool engaging member mounted in the head for receiving a portion of an arc adjustment tool and cooperating with the arc adjustment means to permit manual rotation of the tool to pre-set the one end limit of rotation of the head, the arc adjustment tool engaging member being moveable between an extended position in which the member is disengaged with the arc adjustment means and a retracted locked position in which the tool need not be held down during rotation of the tool in order to adjust the one end limit.