Feedback control circuit for a variable speed hydromotor

(19)

(11)

EP 0 974 752 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	04.10.2000 Bulletin 2000/40

(43)	Date of publication A2:
	26.01.2000 Bulletin 2000/04

(21)	Application number: 99202332.5

(22)	Date of filing: 15.07.1999

(51)	International Patent Classification (IPC)⁷: F03C 1/04, F04B 49/12

(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:

24.07.1998 IT MI981719

(71)	Applicant: RIVA CALZONI OLEODINAMICA S.p.A.
	Anzola dell'Emilia (Bologna) (IT)

(72)	Inventor:
	Breviglieri, Alessandro Casalecchio di Reno (Bologna) (IT)

(74)	Representative: Raimondi, Alfredo, Dott. Ing. Prof.
	Dott. Ing. Prof. RAIMONDI ALFREDO S.r.l. Piazzale Cadorna 15 20123 Milano 20123 Milano (IT)

(54)	Feedback control circuit for a variable speed hydromotor

(57) Device for adjusting the advance of hydraulic motors/pumps provided with propulsors (13) actuating an eccentric drive shaft (14) and with a rotating group (20) for distribution of the fluid actuating the propulsors (13), said rotating distribution group (20) comprising at least one plate (22) mounted idle on the drive shaft (14) and means (31;131;231) designed to co-operate with said plate (22) so as to produce its rotational actuation relative to the drive shaft, said rotation being able to be actuated in both directions and between predetermined angular end-of-travel positions.

Search report