Patent ID: 7419105

Claim:
A spray oscillating control apparatus for sprinklers, comprising a sprinkling control assembly to actuate a swinging operation of a spray body into different angles wherein a gear train assembly with an impeller is mounted to the interior of the sprinkling control assembly, and a spray oscillating control apparatus is provided in linking mechanism with the gear train assembly; the spray oscillating control apparatus is composed of a water duct having a plurality of inlet orifices defining thereon, and a spray control device having a linkage gear wheel at one end and a plurality of covering blocks extending at the other end thereof; the linkage gear wheel of the spray control device is directly meshed with one matching gear of the gear train assembly thereof, and the covering blocks thereof are precisely matched to the inlet orifices thereof; therefore, the linkage gear wheel and the covering blocks of the spray control device are actuated by the gear train assembly to rotate therewith in a gradual manner so as to switch the amount of water supply allowed to enter the inlet orifices thereof, and, thus, spray projected can oscillate rhythmically from far-to-near and near-to-far in distance, achieving an even distribution of the spray onto a lawn thereby; wherein within a channel of a water inlet end, a ring seat is located with a plurality of insert blocks protruding thereon for engaging a location of a positioning fitting having a plurality of insert recesses that define a surface thereon and wherein the inlet orifices of the water duct can be symmetrically disposed at an outer surface communicating with the interior of the water duct, and a stepwise ringed abutment seat defined by a cavity therein is disposed within one end of the water duct; a vent of smaller diameter is disposed at the center of the cavity thereof, permitting a movement chamber and a water-collecting chamber to form a both lateral sides of the ringed abutment seat respectively; the spray control device thereof is contained within the movement chamber wherein the two covering blocks of the spray control device are disposed at both lateral edges of a linking plate to form an H-shaped configuration and symmetrically bulge outwards to figure opposite arcuate curvatures at both sides of the linking plate so as to define a water intake passageway at both upper and lower sides of the linking plate, permitting the covering blocks to abut against the ringed abutment seat and the linking plate to extend across on top of the cavity so as to maintain an appropriate space thereby.