(19)
(11) EP 0 437 962 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.01.1992 Bulletin 1992/03

(43) Date of publication A2:
24.07.1991 Bulletin 1991/30

(21) Application number: 90314055.6

(22) Date of filing: 20.12.1990
(51) International Patent Classification (IPC)5: F04C 2/356
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI NL SE

(30) Priority: 15.01.1990 CS 184/90

(71) Applicant: TRICOLOR LINE LTD.
CS-612 00 Brno (CS)

(72) Inventors:
  • Pazdirek, Jan
    Berkely, California 94707 (US)
  • Lacko, Leopold
    CS-617 00 Brno (CS)
  • Barina, Frantisek
    CS-622 00 Brno (CS)
  • Konecny, Pavel
    CS-616 00 Brno (CS)

(74) Representative: Enskat, Michael Antony Frank 
Saunders & Dolleymore 9, Rickmansworth Road
Watford Hertfordshire WD1 7HE
Watford Hertfordshire WD1 7HE (GB)


(56) References cited: : 
   
       


    (54) Rotary pump


    (57) The pump comprises a housing (1,2,3) defining a cylindrical working chamber (10), a piston in the form of a substantially cylindrical body (6) whose height corresponds to that of the working chamber (10) and a piston collar (7) in the form of a flat oval disc situated on the cylindrical body (6) obliquely to its axis.
    A side groove (16) is provided in the housing walls and comprises a reciprocable partition (8). A suction duct (1) and a discharge duct (6) are situated at either side of said slide groove (16).






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