US Patent 7900851 Pop-up spraying devices with a flexible stem

Embodiments of the invention provide an irrigation pop-up with a flexible stem which may be a pulsating or conventional (i.e., non-pulsating) irrigation sprayer or sprinkler. The flexible stem enables an extended stem to be bent instead of being severed, as experienced by traditional irrigation systems, if impacted by an outside force. In one embodiment, the flexible stem contains a lower rigid segment and an upper rigid segment, each having a passageway extending from an inlet, through the segment, to an outlet. An elastic hollow member, such as a rubber tube, is coupled to and in fluid communication with the passageways of the lower and upper rigid segments. Therefore, a water flow path extends from the water inlet, through the passageway within the lower rigid segment, through the channel of the elastic hollow member, through the passageway within the upper rigid segment, and out through the nozzle, such as a sprayer or sprinkler.