Cylinder-piston unit with device for measuring the position of the piston

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EP 1 201 934 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.12.2003 Bulletin 2003/49

(43)	Date of publication A2:
	02.05.2002 Bulletin 2002/18

(21)	Application number: 01203962.4

(22)	Date of filing: 16.10.2001

(51)	International Patent Classification (IPC)⁷: F15B 15/28

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

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Priority:

23.10.2000 IT RE000100

(71)	Applicant: Ognibene S.p.A.
	42100 Reggio Emilia (IT)

(72)	Inventor:
	Ognibene, Claudio, c/o Ognibene S.P.A. 42100 Reggio Emilia (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)	Cylinder-piston unit with device for measuring the position of the piston

(57) A cylinder-piston unit (1) comprising a cylinder (2) containing in its interior a piston rod (3), at least one end of which emerges from said cylinder (2), said piston rod (3) being rigid with a piston (4) sealedly slidable within said cylinder (2), there being associated with said cylinder-piston unit (1) a device for measuring the axial position assumed by said piston (4) within said cylinder (2); said measuring device comprises M (M ≥ 1) movable sensor elements (9) rigid with said piston (4) and N (N ≥ 1) fixed sensor elements (100) positioned external to said cylinder (2).

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