(19)
(11) EP 0 914 840 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.09.2001 Bulletin 2001/38

(43) Date of publication A2:
12.05.1999 Bulletin 1999/19

(21) Application number: 98830603.1

(22) Date of filing: 12.10.1998
(51) International Patent Classification (IPC)7: A62C 2/24, A62C 2/18
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 13.10.1997 IT RM970616

(71) Applicant: MEGARAD S.r.l.
00173 Roma (IT)

(72) Inventors:
  • Ambrosio, Angelo
    00173 Rome (IT)
  • Zehender, Rodolfo
    00173 Rome (IT)

(74) Representative: Sneider, Massimo 
Studio Tecnico Lenzi, Via Lucania, 13
00187 Roma
00187 Roma (IT)

   


(54) Improved fire protection systems in ventilation installations


(57) This invention relates to the improvement of fire protection in aeration-ventilation systems, where the bulkhead (4) of the aeration and ventilation pipes (2) of the system installed in a building is characterized by the fact that it is held in the lifted open position by means of a polyolephinic thermo-shrinking element (1), which lines the inside of the pipe (2) for a short stretch in the proximity of the bulkhead (4), which poliolephinic system (1) is capable of maintaining a stable form memory at room temperature, and in a predetermined temperature range, and is capable of radially and axially shrinking as the temperature increases and when the temperature reaches the predetermined values, when it deprives the bulkhead of support and leaves it free to drop and to seal off the pipe (2).






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