(19)
(11) EP 0 469 368 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.03.1992 Bulletin 1992/11

(43) Date of publication A2:
05.02.1992 Bulletin 1992/06

(21) Application number: 91111742.2

(22) Date of filing: 15.07.1991
(51) International Patent Classification (IPC)5: B05B 11/00
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30) Priority: 03.08.1990 IT 2119690

(71) Applicant: MAS S.p.A. MICRODISPENSATORI - MACCHINE ATTREZZATURE SPECIALI
I-66020 S. Giovanni Teatino (Chieti) (IT)

(72) Inventor:
  • Di Mascio, Francesco
    I-65100 Pescara (IT)

(74) Representative: Giambrocono, Alfonso, Dr. Ing. et al
Ing. A. Giambrocono & C. S.r.l. Via Rosolino Pilo 19/B
20129 Milano
20129 Milano (IT)


(56) References cited: : 
   
       


    (54) Manual pump for dispensing liquid substances contained in bottles and comprising a non-return valve with a socket-shaped or double socket-shaped valving member


    (57) In a manual pump (10) for dispensing predetermined quantities of liquid substance contained in bottles, the valving member (36; 136) of the non-return valve, which prevents the liquid substance present in the pressure chamber (28) from returning to the bottle, is in the form of a solid of revolution and has a socket-shaped lateral surface (37; 137) comprising a coaxial frusto-conical sealing portion (38; 138) which mates with the corresponding frusto-conical surface (40) of the valve seat. The valving member is of injection-mouldable plastics material, of a kind not attacked by commonly dispensed substances.
    The valving member (136) can comprise a second socket-shaped lateral surface part (137') arranged specular to the first (137).






    Search report