| 摘要 |
A ball-type water sprinkler of the sector type includes tow inlets (21,22) into the ball chamber (18) oriented to direct the water to flow in opposite directions circumferentially around the chamber (18), and a shutter (24) rotatable with the rotor (16) and movable either to a first position with respect to the rotor (16) covering one inlet and uncovering the other inlet to cause the water to flow in a first direction, or to a second position uncovering the one inlet and covering the other inlet to cause the water to flow in the opposite direction. The shutter (24) is actuated by a member (36) rotatable with the rotor (16) and cooperable with the sector stops (38,40) of the sprinkler, the actuator (36) being coupled to the shutter (24) by an over-center spring coupling (42) producing a snap-action movement of the shutter (36) to either its first or second positions. |
