EP 0118403 A1 19840912 - Back flow preventing device in the outlet pipe of a pump.
Title (en)
Back flow preventing device in the outlet pipe of a pump.
Title (de)
Einrichtung im Auslass einer Pumpe zur Vermeidung von Rückströmung.
Title (fr)
Dispositif dans le tuyau d'émission d'une pompe pour éviter des courants contraires.
Publication
Application
Priority
SE 8300797 A 19830215
Abstract (en)
The invention concerns a device which prevents backflow of liquid into a pump unit. The outlet pipe (4) from a pump (1) is provided with a telescopic extension (5) supported by a float (6) on the surface of the receiver. The static head may then be minimized, independant of the liquid level in the receiver.
IPC 1-7
IPC 8 full level
F16K 13/00 (2006.01); F04B 53/10 (2006.01); F04D 13/06 (2006.01); F04D 15/02 (2006.01); F04D 29/40 (2006.01); F16K 15/00 (2006.01)
CPC (source: EP)
F04D 13/066 (2013.01); F04D 15/0218 (2013.01); F04D 29/406 (2013.01)
Citation (search report)
- [A] US 4030859 A 19770621 - HENEGAR DALE L
- [A] DE 1528665 A1 19710121 - BURGER EWALD
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0118403 A1 19840912; EP 0118403 B1 19860716; DE 3460283 D1 19860821; JP H0143188 B2 19890919; JP S59205075 A 19841120; SE 449897 B 19870525; SE 8300797 D0 19830215; SE 8300797 L 19840816
DOCDB simple family (application)
EP 84850036 A 19840202; DE 3460283 T 19840202; JP 2456184 A 19840214; SE 8300797 A 19830215