Global Patent Index - EP 2025937 A1

EP 2025937 A1 2009-02-18 - Reciprocating pump

Title (en)

Reciprocating pump

Title (de)

Kolbenpumpe

Title (fr)

Pompe alternative

Publication

EP 2025937 A1 (EN)

Application

EP 07425514 A

Priority

EP 07425514 A

Abstract (en)

A reciprocating pump (1) comprising a pumping chamber (30) and an intermediate chamber (40), a reciprocating member (50), high pressure seal means (21) between the pumping chamber (30) and the intermediate chamber (40), low pressure seal means (22) between the intermediate chamber (40) and the crankshaft housing (10), a pumping circuit (60) and an auxiliary circuit (70) in fluid separation from the pumping circuit (60). The pump further comprises a recirculating unit (80) whose inlet is connected to the delivery chamber (72) of the auxiliary circuit (70) and whose outlet is connected to the suction chamber (71) of the auxiliary circuit (70). The recirculating unit (80) comprises a recirculating pump (81) which is designed to suck fluid from the delivery chamber (72) and pump such fluid in the suction chamber (71) for fluid recirculating in the auxiliary circuit (70).

IPC 8 full level (invention and additional information)

F04B 53/08 (2006.01)

CPC (invention and additional information)

F04B 53/08 (2013.01); F04B 5/00 (2013.01); F04B 53/164 (2013.01); F04B 53/18 (2013.01)

Citation (applicant)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

DOCDB simple family

EP 2025937 A1 20090218; EP 2025937 B1 20100623; AT 472058 T 20100715; DE 602007007325 D1 20100805