(19)
(11) EP 0 172 795 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.01.1987 Bulletin 1987/03

(43) Date of publication A2:
26.02.1986 Bulletin 1986/09

(21) Application number: 85850233

(22) Date of filing: 10.07.1985
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL

(30) Priority: 01.08.1984 CH 371284

(71) Applicant: Institut Cerac S.A.
 ()

(72) Inventor:
  • Lagne, Ulf Jöran
     ()

   


(54) A fluid pump


(57) A fluid pump having an elastic tubular member (21) as pumping element The tube is provided with helically extending reinforcing threads (42). Pressurization of the interior of the tube results in a change of volume of the tube. This volume change accomplishes the pumping.






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