Device for causing motor stoppage on the basis of liquid delivery in jet washers

(19)

(11)

EP 0 805 470 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	25.10.2000 Bulletin 2000/43

(43)	Date of publication A2:
	05.11.1997 Bulletin 1997/45

(21)	Application number: 97200887.4

(22)	Date of filing: 24.03.1997

(51)	International Patent Classification (IPC)⁷: H01H 35/38

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB IT LI NL PT SE

(30)

Priority:

29.04.1996 IT RE960026

(71)	Applicant: Annovi & Reverberi S.r.l.
	41100 Modena (IT)

(72)	Inventor:
	Magri, Maurizio 41100 Modena (IT)

(74)	Representative: Corradini, Corrado et al
	Studio Ing. C. CORRADINI & C. S.r.l. 4, Via Dante Alighieri 42100 Reggio Emilia 42100 Reggio Emilia (IT)

(54)	Device for causing motor stoppage on the basis of liquid delivery in jet washers

(57) The device comprises a piston (17) sensitive to the pressure difference between the upstream and downstream side of the valving element for the pressurized water flow to the delivery lance.
Said piston (17) is connected, in series therewith, into a low voltage electrical circuit which is closed and respectively opened by the movements of said piston, said movements bringing it into contact with, and respectively withdrawing it from, an electrode (19), an electronic circuit (260) being provided which, in response to contact between the piston (17) and the electrode (19) energizes an electrical switch to open the power circuit of the jet washer electric motor.

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