(19)
(11) EP 0 317 716 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.08.1989 Bulletin 1989/32

(43) Date of publication A2:
31.05.1989 Bulletin 1989/22

(21) Application number: 88114447.1

(22) Date of filing: 05.09.1988
(51) International Patent Classification (IPC)4: F04B 15/02, F04B 21/08, F04B 21/02, F04B 21/00
(84) Designated Contracting States:
BE CH DE ES FR GB IT LI NL SE

(30) Priority: 23.11.1987 IT 370287

(71) Applicant: SOILMEC S.p.A.
I-47023 Cesena (Province of Forli) (IT)

(72) Inventor:
  • Trevisani, Davide
    I-47023 Cesena Province of Forli (IT)

(74) Representative: Modiano, Guido, Dr.-Ing. et al
Modiano & Associati S.r.l. Via Meravigli, 16
20123 Milano
20123 Milano (IT)


(56) References cited: : 
   
       


    (54) Suction and force plunger pump


    (57) The suction and force plunger pump has at least one pumping chamber (31) in which a suction and force plunger (18), actuated by a cross-head crank system (14), is inserted at a packing-gland sealing device (32, 33). While said plunger is connected to said cross-head by means of a quick coupling (19), the packing-gland device is mounted so as to be extractable from said pumping chamber through an opening (23) thereof opposite to said cross-head and, at the same opening, its casing (35) is axially but not tangentially engaged by a ring (37) which is normally adapted to ensure the sealing lock between said chamber (31), said casing (35) and said ring (37) and vice versa to determine the extraction of the packing-gland device and, if said coupling is open, of the related plunger.







    Search report