EP 0216406 B1 19910731 - FLUID DRIVEN PUMPING APPARATUS

Title (en)

FLUID DRIVEN PUMPING APPARATUS

Publication

EP 0216406 B1 19910731 (EN)

Application

EP 86201423 A 19860815

Priority

GB 8521978 A 19850904
GB 8605033 A 19860228

Abstract (en)

[origin: EP0216406A1] A fluid driven pumping apparatus comprises a housing (1) containing a twin rotor screw type positive displacement motor (10) and a twin rotor screw type positive displacement pump (11). The screw rotors of said pump (11A,11B) and motor (10A,10B) are mounted on a pair of common shafts (13,14).

IPC 1-7

F01C 13/04; E21B 43/12; F04C 11/00

IPC 8 full level

E21B 43/12 (2006.01); F01C 13/04 (2006.01); F04C 11/00 (2006.01)

CPC (source: EP US)

E21B 43/129 (2013.01 - EP US); F01C 13/04 (2013.01 - EP); F04C 11/003 (2013.01 - EP)

Citation (examination)

DE 3409970 C1 19850718 - CHRISTENSEN INC NORTON
Laurenz Richter," Schraubenverdichter," Springer Verlag,1979,p.124-125

Designated contracting state (EPC)

AT DE GB IT NL

DOCDB simple family (publication)

EP 0216406 A1 19870401; EP 0216406 B1 19910731; AU 595828 B2 19900412; AU 6215386 A 19870305; CA 1289412 C 19910924; DE 3680621 D1 19910905; NO 171028 B 19921005; NO 171028 C 19930113; NO 863514 D0 19860902; NO 863514 L 19870305; SG 69692 G 19920904

DOCDB simple family (application)

EP 86201423 A 19860815; AU 6215386 A 19860902; CA 517400 A 19860903; DE 3680621 T 19860815; NO 863514 A 19860902; SG 69692 A 19920703