(19)
(11) EP 0 403 829 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.10.1991 Bulletin 1991/43

(43) Date of publication A2:
27.12.1990 Bulletin 1990/52

(21) Application number: 90110058.6

(22) Date of filing: 28.05.1990
(51) International Patent Classification (IPC)5: G05D 16/02
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR LI LU NL SE

(30) Priority: 20.06.1989 IT 2092889

(71) Applicant: ING. ENEA MATTEI S.p.A.
I-20090 Vimodrone Milano (IT)

(72) Inventor:
  • Boldrini, Adolfo
    I-20100 Milano (IT)

(74) Representative: Petruzzelli, Antonio European Patent Attorney 
C.so Italia, No. 43
20122 Milano
20122 Milano (IT)


(56) References cited: : 
   
       


    (54) Rotary compressor with oleopneumatic delivery control device


    (57) In a rotary type air compressor comprising a recycling circuit for the air provided with a check valve (29) operatively connected to a fluid actuated control cylinder having a piston member (28) operatively subjected to the vacuum in the intake chamber (13) of the compressor and to the oil pressure in the control cylinder (20) of the intake valve (15) of the compressor, and means (38, 39) connected to said piston member (28) for controlling the air-flow recycled to the intake chamber (13).







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