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Priority claimed from DE3026550Aexternal-prioritypatent/DE3026550C2/en
Priority claimed from DE19803041309external-prioritypatent/DE3041309A1/en
Application filed by Dieter SchmidtfiledCriticalDieter Schmidt
Priority claimed from EP81105295Aexternal-prioritypatent/EP0044031B1/en
Application grantedgrantedCritical
Publication of ATE6289T1publicationCriticalpatent/ATE6289T1/en
Pneumatically operated sliding fire door - has hollow piston rod with inlet port at piston carrying end and outlet port at other end coupled to handle operated valve