(19)
(11) EP 0 033 239 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.12.1981 Bulletin 1981/52

(43) Date of publication A2:
05.08.1981 Bulletin 1981/31

(21) Application number: 81300320

(22) Date of filing: 23.01.1981
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 25.01.1980 AU 214680

(71) Applicant: AQUILA STEEL COMPANY LIMITED
 ()

(72) Inventor:
  • Favelle, Edward H.
     ()

   


(54) Crane hydraulic control system


(57) A crane hoise drive assembly having a hydraulic motor (20) driven by a variable displacement hydraulic pump (21) and a control circuit (10) for the pump adapted to govern the pump displacement so that the lift generated by said motor is independent of line travel and is adjustably predetermined.






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