A concealed sprinkler with drop down deflector assembly includes a pair of frame arms which resemble a tuning-fork, there being a gap between the free end portions of the arms. As a result, the arms are not subject to assembly loads or system pressure loads. The drop down deflector assembly is mounted...http://www.google.es/patents/US4976320?utm_source=gb-gplus-sharePatente US4976320 - Concealed sprinkler with drop down deflector assembly, and improved fusible valve lever assembly
Concealed sprinkler with drop down deflector assembly, and improved fusible ...
