EP 0561494 A3 19931103 - MOINEAU-TYPE PUMP
Title (en)
MOINEAU-TYPE PUMP
Publication
Application
Priority
ZA 921133 A 19920217
Abstract (en)
[origin: EP0561494A2] A positive displacement pump 10 includes a pressure chamber 62 having a pumping outlet 79 connected to a delivery conduit 58. The pump 10 includes a bypass outlet 64 connected to the pressure chamber and a valve 70 in the bypass outlet. The valve 70 is open when the pump is not operative and closes automatically when a predetermined pumping volume is attained. The pump may advantageously be a submersible progressive cavity pump, the delivery conduit being a rising main having a foot valve 80 associated therewith. The bypass outlet is in communication with a body of fluid external of the rising main, eg with a borehole. Initially, during start-up, delivery of the pump is directed via the bypass outlet against a low head or substantially no head. Only after start-up, is the delivery directed via the pumping outlet 79, into the delivery conduit at a head prevailing in the rising main 58. <IMAGE>
IPC 1-7
IPC 8 full level
F04C 14/06 (2006.01); F04C 15/00 (2006.01)
CPC (source: EP)
F04C 14/06 (2013.01); F04C 15/0053 (2013.01)
Citation (search report)
- [X] US 4416592 A 19831122 - LINDTVEIT HERBERT E [US]
- [X] FR 2206283 A1 19740607 - ENVIRONMENT ONE CORP [US]
- [A] GB 2157766 A 19851030 - FACET ENTERPRISES
- [A] FR 1513047 A 19680209 - BORG WARNER
- [A] US 2267459 A 19411223 - HAIT JAMES M
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0561494 A2 19930922; EP 0561494 A3 19931103; AU 3297193 A 19930819; ZA 93900 B 19930910; ZW 1993 A1 19930602
DOCDB simple family (application)
EP 93300805 A 19930203; AU 3297193 A 19930210; ZA 93900 A 19930209; ZW 1993 A 19930201