| 摘要 |
FORM 24 A SPRINKLER HEAD In sprinkler heads, as commonly used for irrigation, it is known to employ a seal bearing between a the outlet end of a vertical water supply pipe and a nozzle which permits the nozzle to be rotated about the axis of the supply pipe so that water is expelled in a circular pattern about the supply pipe. In this invention the seal bearing is replaced by a flexible conduit and a nozzle guide thus eliminating leakage and wear at the seal bearing.
|
