(19)
(11) EP 0 496 379 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.10.1992 Bulletin 1992/44

(43) Date of publication A2:
29.07.1992 Bulletin 1992/31

(21) Application number: 92101014.6

(22) Date of filing: 22.01.1992
(51) International Patent Classification (IPC)5: F04B 43/12
(84) Designated Contracting States:
DE FR GB

(30) Priority: 23.01.1991 JP 6239/91

(71) Applicants:
  • SHARP KABUSHIKI KAISHA
    Osaka 545 (JP)
  • BAXTER INTERNATIONAL INC.
    Deerfield, IL 60015 (US)

(72) Inventors:
  • Goi, Nobuaki
    Yamatokoriyama-shi, Nara-ken (JP)
  • Tseng, Charles
    Lake Bluff, Illinois (US)
  • Scola, Roberta
    Roselle, Illinois (US)
  • Myren, Eric
    Barrington, Illinois (US)
  • Hamilton, Dan
    Hoffman Estates, Illinois (US)

(74) Representative: TER MEER - MÜLLER - STEINMEISTER & PARTNER 
Mauerkircherstrasse 45
81679 München
81679 München (DE)


(56) References cited: : 
   
       


    (54) Peristaltic pump assembly


    (57) A peristaltic pump assembly for pumping a fluid medium from a fluid source through a tubing (17) having a compressible pumping section, which assembly comprises a housing including at least one support wall (11a,11b); a drive shaft (13) journalled substantially loosely to the support wall; a plurality of cam plates (14) eccentrically mounted on the drive shaft in a helical pattern along the drive shaft (13) and rotatable together with the drive shaft (13) for, during a rotation of the drive shaft (13), driving finger plates (15) sequentially in a direction perpendicular to the drive shaft (13) to cause respective finger tips (15a) of the finger plates (15) to engage the pumping section thereby producing a moving zone of occlusion along the pumping section for pumping the fluid medium; and an adjustment mechanism mounted on the support wall (11a,11b) for adjustably displacing the drive shaft (13) together with the cam plates (14) and the finger plates (15) in a direction perpendicular thereto. The adjustment mechanism comprises a shaft bearing plate (22) mounted on the support wall (11a,11b) for movement in a linear direction parallel to the direction of movement of each finger plate (15) and through which the drive shaft (13) extends rotatably, and a drive member (31,32) for adjustably moving the bearing plate (22) in the linear direction.






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