| 摘要 |
In an improved oscillating arm mechanism including a fluid engaging member for contact with a fluid sprinkler stream to move a distal portion of the member into and away from the fluid stream. The fluid engaging member includes at least two surfaces on its distal portion for moving the member into and away from the fluid stream. A walling surface is used to wall the member onto the stream and for driving the member further into the fluid stream. A repelling surface is used to provide a disengaging or repelling force to drive the member out of the stream and to begin another cycle of operation. Further, the fluid engaging member provides an exit channel means on the side opposite the two or more surfaces of the device to allow maximum fluid flow of the fluid stream to continue its original direction during engagement and disengagement of the member and the fluid stream.
|
