| 摘要 |
<p>The rotary drive sprinkler comprises a housing (1) for coupling to an irrigation water supply (3), a sprinkler spray head (12) rotatably mounted with respect to the housing (1) and flow coupled to supply (3) and a rotary drive mechanism (5) located within the housing (1) so as to be driven by the water supply (3) and a transmission mechanism (6) coupled to the drive mechanism (5) and having first and second, oppositely directed, rotary outputs (7a, 7b), there being further provided a reversing mechanism (8) including a stop assembly having stop members (9a, 9b) arcuately displaceable with respect to each other between a juxtaposed position and a variable spaced apart position, a trip assembly (10) responsively juxtaposed with respect to the stop members (9a, 9b) so as to be reversibly displaced by successive contacting with the stop members (9a, 9b) only when the latter are in their angularly spaced apart position one of the assemblies being rotationally driven by the drive mechanism (5) and selective coupling means responsively coupled to the trip assembly (10) for coupling to the one or the other of the outputs (7a, 7b) respectively in response to the reversible displacement of trip assembly (10) and a drive member (11) coupled, on the one hand, to spray head (12) and, on the other hand, to the coupling means so as to be rotationally driven about a drive axis. <IMAGE></p> |
