초록 ▼

A sprinkler (2) includes a rotary nozzle (6) mounted on a body (4). A reversible drive (12) includes an internal gear (14) connected to the nozzle (6), a motor (16) having a unidirectional output shaft (18), and an oscillating gear train (20) having two final drive gears (27) or (29) which rotate re

A sprinkler (2) includes a rotary nozzle (6) mounted on a body (4). A reversible drive (12) includes an internal gear (14) connected to the nozzle (6), a motor (16) having a unidirectional output shaft (18), and an oscillating gear train (20) having two final drive gears (27) or (29) which rotate reversely relative to one another and are engageable with driven gear (14) for reversing the direction of nozzle rotation. The first and second final drive gears (27) and (29) are mounted on first and second pivot arms (22a) and (22b) and are part of two gear sets (26) or (28). The numbers of gears in each gear set (26) or (28) is selected in conjunction with the direction of the pivoting motion of the pivoting arms (22a) or (22b) so that the additional rotation induced on the final drive gears as they rotate above the stationary part of the gear train (20) will always be counter to the normal direction of rotation thereof.

대표청구항 ▼

An improved sprinkler of the type having a nozzle which is rotatable about an axis of rotation, a reversible drive means for rotating the nozzle about its rotational axis in opposed first and second directions, wherein the drive means includes a driven gear nonrotatably fixed to the nozzle and first

An improved sprinkler of the type having a nozzle which is rotatable about an axis of rotation, a reversible drive means for rotating the nozzle about its rotational axis in opposed first and second directions, wherein the drive means includes a driven gear nonrotatably fixed to the nozzle and first and second final drive gears which normally rotate reversely relative to one another and which are alternately engageable with the driven gear for achieving the opposed directions of nozzle movement, wherein the improvement relates to the first and second final drive gears and comprises: (a) means for pivotally supporting each of the final drive gears for a swinging motion towards and away from the driven gear to engage or disengage the driven gear, respectively; and (b) means for rotating each of the final drive gears reversely relative to the normal rotation thereof when each final drive gear is pivoted away from the driven gear, thereby allowing the final drive gears to more easily disengage the driven gear.