(19)
(11) EP 0 883 147 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.08.1999 Bulletin 1999/32

(43) Date of publication A2:
09.12.1998 Bulletin 1998/50

(21) Application number: 98110071.2

(22) Date of filing: 03.06.1998
(51) International Patent Classification (IPC)6: H01H 35/38, H01H 3/24
(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: 03.06.1997 IT PV970007 U

(71) Applicant: Vimatic S.r.l.
27100 Pavia (IT)

(72) Inventor:
  • Viezzoli, Giorgio
    27100 Pavia (IT)

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

   


(54) Hydraulic or pneumatic pressure differential electric switch


(57) The present invention relates to a hydraulic or pneumatic pressure differential electric switch, comprising a switch body defining herein a chamber which can be arranged between two hydraulically or pneumatically pressurized regions.
In the chamber is tightly movable, under the pressure differential between the mentioned two regions, a movable electric contact cooperating with a fixed electric contact supported by the switch body through a dielectric spacer element.
The movable electric contact is moreover acted upon by counter-biassing resilient means.






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