Hydraulic-electromagnetic motor pump with floating piston

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EP 1 365 149 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	17.12.2003 Bulletin 2003/51

(43)	Date of publication A2:
	26.11.2003 Bulletin 2003/48

(21)	Application number: 03010665.2

(22)	Date of filing: 13.05.2003

(51)	International Patent Classification (IPC)⁷: F04B 17/04

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
	Designated Extension States:
	AL LT LV MK

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Priority:

23.05.2002 IT MI20020271 U

(71)	Applicant: C.E.M.E. Engineering S.p.A.
	20122 Milano (IT)

(72)	Inventor:
	Botti, Rino 20063 Cernusco S/N, Milan (IT)

(74)	Representative: Lecce, Giovanni
	UFFICIO BREVETTI CALCIATI S.r.l. Via Fratelli Ruffini, 9 20123 Milano 20123 Milano (IT)

(54)	Hydraulic-electromagnetic motor pump with floating piston

(57) A motor pump (10) of the hydraulic-electromagnetic type with floating piston comprising a container body (12) being partly delimited, in its external part, by a coil (14); an inlet duct (44') and an opposite outlet duct (36); a couple of opposite magnetic bearings (46, 46') that are spaced between them and placed between said body (12) and coil (14); a delivery piston (16) that is placed inside the body (12) and slides in it supported by a front helical-shaped spring (20) and by a rear one (20') and a magnetic bushing (52) placed in the central-lower part of the body (12) facing the inlet duct (44).

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