Direct joint system for drive shaft-flexible rotor for self-priming pumps

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(11)

EP 2 042 736 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	10.08.2011 Bulletin 2011/32

(43)	Date of publication A2:
	01.04.2009 Bulletin 2009/14

(21)	Application number: 08015679.7

(22)	Date of filing: 05.09.2008

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International Patent Classification (IPC):

F04C 5/00^(2006.01)
F04C 15/00^(2006.01)

F04C 13/00^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA MK RS

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Priority:

26.09.2007 IT MI20071849

(71)	Applicant: Bruno Wolhfarth SRL
	26858 Sordio (LO) (IT)

(72)	Inventor:
	Wolhfarth, Bruno 26858 Sordio Lodi (IT)

(74)	Representative: Di Iorio, Vincenzo
	EUPAT Galleria Buenos Aires 15 20124 Milano 20124 Milano (IT)

(54)	Direct joint system for drive shaft-flexible rotor for self-priming pumps

(57) The rotor (G), made up by an annular central body (C) provided externally with flexible radial blades (R) forming a sole body with said annular body, is characterized in that it includes, as integral part, means for the rotation coupling with the provided shaft end (A) for supporting the rotor (C) ; said means being machined in the shaft (A) and in the rotor (C); said means being obtained by total press-molding in a sole piece of the annular body and the flexible radial wings of the rotor (C).
According to a simple and economical embodiment said means are made up of a wall or rib (D) that crosses diametrally the rotor hole and that is engaged with a corresponding groove provided on the shaft end.

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