Global Patent Index - EP 1039133 A1

EP 1039133 A1 2000-09-27 - BOB SYSTEM FOR ALTERNATING PUMPS

Title (en)

BOB SYSTEM FOR ALTERNATING PUMPS

Title (de)

STELLGLIED FÜR ALTERNIERENDE PUMPEN

Title (fr)

SYSTEME DE POUSSEE DE TIGE POUR POMPES ALTERNATIVES

Publication

EP 1039133 A1 (EN)

Application

EP 98946465 A

Priority

ES 9800274 W

Abstract (en)

The bob system for alternating pumps comprises a pyramidal tower (8) (fig. 1) with a truncated summit (5 and 6) (fig. 1) wherein a single acting hydraulic cylinder (2) (fig. 1) can rest, which are installed at the vertical of a water or oil well (16) (fig. 1). The piston (3) (fig. 1) of the hydraulic cylinder (2) (fig. 2) has a prolongation with holes (19) (fig. 2) which, during its down stroke, is introduced inside the support tube thereby producing a choking effect and forcing the oil to pass through the holes and slowing down gently the rod (10) (fig. 2) at the end of its down stroke. In the up stroke of the rod (10) (fig. 2) the contrary occurs, that is an acceleration up to the freeing of the piston extension (19) (fig. 2) inside the support tube (4) (fig. 2) thereby creating an overpressure which is compensated by an accumulator (23) (fig. 3). <IMAGE>

IPC 1-7 (main, further and additional classification)

F04B 47/04; F04B 9/107

IPC 8 full level (invention and additional information)

F04B 47/04 (2006.01)

CPC (invention and additional information)

F04B 47/04 (2013.01)

Citation (search report)

See references of WO 0020758A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1039133 A1 20000927; AU 9349298 A 20000426; EA 001692 B1 20010625; EA 200000612 A1 20001225; WO 0020758 A1 20000413

INPADOC legal status


2003-05-02 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20021023

2002-07-31 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020612

2000-09-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000626

2000-09-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-09-27 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL PAYMENT 20000622;LT PAYMENT 20000622;LV PAYMENT 20000622;RO PAYMENT 20000622;SI PAYMENT 20000622