A spray nozzle assembly, especially for spraying liquid manure, has a nozzle body which can be inserted in and fastened to a pipe stud by means of a union suitable for dye coding so that the nozzle can be easily identified. The nozzle body is surrounded by a circumferential metal sealing disk pressed...http://www.google.de/patents/US5199649?utm_source=gb-gplus-sharePatent US5199649 - Spray nozzle
