Spray device, especially for preventing ice formation on runways, has spray cap with piston cylinder device connected to overpressure supply and underpressure outlet

摘要

The spray device has at least one overpressure supply line connecting a liquid reservoir to the inlet of a chamber in at least one spray cap (6). A cylinder housing a piston is provided inside the spray cap, the cavity defined by the cylinder and piston being provided with a cylinder outlet connected to an underpressure discharge line. The piston includes a valve body cooperating with a valve seat in the spray outlet for the liquid, so that the pressure drop across the piston determines the position of the valve body relative to the valve seat. Independent claims are also included for (a) a spraying vehicle (1) provided with this spray device, and (b) the spray cap.