EP 1604070 A1 20051214 - DEVICE FOR PREVENTING BACKFLOW
Title (en)
DEVICE FOR PREVENTING BACKFLOW
Title (de)
RÜCKFLUSSVERHINDERER
Title (fr)
DISPOSITIF DESTINE A EMPECHER LE REFLUX
Publication
Application
Priority
- EP 2004002235 W 20040305
- DE 10311251 A 20030314
Abstract (en)
[origin: WO2004081302A1] The invention relates to a device for preventing backflow (1), comprising a housing (2) provided with an inlet and an outlet forming a flow path leading from the inlet to the outlet; two return valves (9, 10, 23, 30) which open out into the direction of flow and which are arranged behind each other; a discharge channel (16) which discharges from the intermediate area between the two return valves; a valve body (17) which seals the discharge channel (16) inside the housing and which is sealingly displaceable in relation thereto inside the housing, said valve body being displaced by the effect of a spring in order to occupy an open position in which the discharge channel is released and occupying a closed position when the housing is cross-flown counter to the effect of the spring, receiving therein the return valve, which is arranged downstream. The aim of the invention is to enable a device provided with said device for preventing backflow to be additionally operated in a suction mode, wherein a blocking device (34) which maintains the two return valves (9, 10, 23, 30) in an open position and which maintains the valve body (17) in a closed position is provided.
IPC 1-7
IPC 8 full level
E03C 1/10 (2006.01); F16K 15/06 (2006.01)
CPC (source: EP)
E03C 1/106 (2013.01); E03C 1/108 (2013.01); F16K 15/066 (2013.01)
Citation (search report)
See references of WO 2004081302A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004081302 A1 20040923; AU 2004219972 A1 20040923; CN 1761793 A 20060419; DE 10311251 B3 20050105; EP 1604070 A1 20051214
DOCDB simple family (application)
EP 2004002235 W 20040305; AU 2004219972 A 20040305; CN 200480006951 A 20040305; DE 10311251 A 20030314; EP 04717598 A 20040305