(19)
(11) EP 2 009 283 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.04.2009 Bulletin 2009/18

(43) Date of publication A2:
31.12.2008 Bulletin 2009/01

(21) Application number: 08163603.7

(22) Date of filing: 19.01.2007
(27) Previously filed application:
 19.01.2007 EP 07100835
(51) International Patent Classification (IPC): 
F04B 9/105(2006.01)
F01L 23/00(2006.01)
F04B 43/113(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(62) Application number of the earlier application in accordance with Art. 76 EPC:
07100835.3 / 1947331

(71) Applicant: Garniman SA
Carrasco Montevideo (UY)

(72) Inventor:
  • Eysymontt, Jan
    1260, Nyon (CH)

(74) Representative: Cronin, Brian Harold John 
CRONIN Intellectual Property Chemin de Précossy 31
1260 Nyon
1260 Nyon (CH)

   


(54) Hydraulically driven machine improvement


(57) A hydraulically driven diaphragm pumping machine comprises a plunger (6) that is slidably mounted in a middle part of the inside of the machine's hydraulic cylinder (5) between first and second bellow-like diaphragms (4,10). Ends of the plunger (6) are connected to the first and second bellows-like diaphragm (10) to define respective first and second outer annular spaces (a) that are independent of one another, and the pressure of fluid in the first annular space (a) is independent of the pressure of fluid in the second annular space (a). The machine may also comprise a hydromechanical switch for commutating a value (102) to automatically control the supply of hydraulic fluid to the hydraulic cylinder at given moments of the machine's cycle.







Search report