(19)
(11) EP 0 542 696 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.07.1993 Bulletin 1993/30

(43) Date of publication A2:
19.05.1993 Bulletin 1993/20

(21) Application number: 92830550.7

(22) Date of filing: 01.10.1992
(51) International Patent Classification (IPC)5: H01H 35/34
(84) Designated Contracting States:
AT CH DE ES FR GB LI NL SE

(30) Priority: 15.11.1991 IT MI913050

(71) Applicant: MA-TER S.r.l.
I-20060 Pessano con Bornago, (Milano) (IT)

(72) Inventors:
  • Omati, Ennio, c/o MA-TER S.r.l.
    I-22060 Pessano Con Bornago (MI) (IT)
  • Omati, Marco, c/o MA-TER S.r.l.
    I-22060 Pessano Con Bornago (MI) (IT)

(74) Representative: Cicogna, Franco 
Ufficio Internazionale Brevetti Dott.Prof. Franco Cicogna Via Visconti di Modrone, 14/A
20122 Milano
20122 Milano (IT)


(56) References cited: : 
   
       


    (54) Pressure switch having a manually operated safety microswitch


    (57) The present invention relates to a pressure switch having a manually operated safety microswitch, characterized in that it comprises a bottom body, defining in its inside a chamber communicating with a fluid to be controlled, and associated with a top cap, which supports an operating microswitch. The chamber is closed by a membrane, preferably made of a silicone material, provided with an O-ring and coupled to a steel membrane, with a driving tappet assembly which is directly formed on the latter membrane and operates on a washer element, which is counter biassed by a first counterbiassing spring and operates on a push-button of the operating microswitch, a safety microswitch being moreover provided, which can be manually operated or re-armed, and cooperating with a pin element extending from the washer.






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