(19)

(11)

EP 0 497 839 A1

(12)

(43) Date of publication: 12.08.1992 Bulletin 1992/33 (21) Application number: 90916041.0 (22) Date of filing: 31.10.1990

(51) International Patent Classification (IPC):  B29C 45/ 14( . ) F16K 27/ 06( . ) (86) International application number: PCT/IT1990/000088 (87) International publication number: WO 1991/006797 (16.05.1991 Gazette 1991/11)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 02.11.1989 IT 19890067931 (71) Applicant: V. P. VALPAS VALVOLE S.r.l. I-28078 Romagnano Sesia (Novara) (IT)	(72) Inventors: PASQUALE, Marco I-13011 Borgosesia (IT) PASQUALE, Sergio I-13011 Borgosesia (IT) (74) Representative: Notaro, Giancarlo  c/o Jacobacci-Casetta & Perani S.p.A. Via Alfieri, 17 I-10121 Torino I-10121 Torino (IT)