EP 0582628 B1 19970122 - MULTI-LAYERED DIAPHRAGM WITH LEAKAGE OFFTAKE FOR DIAPHRAGM PUMPS
Title (en)
MULTI-LAYERED DIAPHRAGM WITH LEAKAGE OFFTAKE FOR DIAPHRAGM PUMPS
Title (de)
MEHRLAGEN-MEMBRAN MIT LECKAGE-ABLEITUNG FÜR MEMBRANPUMPEN
Title (fr)
MEMBRANE A COUCHES MULTIPLES A CONDUIT D'EVACUATION DE FUITES POUR POMPES A MEMBRANES
Publication
Application
Priority
- DE 9200351 W 19920504
- DE 4114439 A 19910503
Abstract (en)
[origin: WO9219866A1] A multi-layered diaphragm with leakage offtake for diaphragm pumps, in particular hydraulic pumps, has at least two superposed individual diaphragms (1, 2) fixed to a rotating clamping site. A space (10) is located between adjacent individual diaphragms (1, 2). At least one space (10) contains at least one fold-free and force-free layer (9) made of a nonwoven, knitted, or woven hard-filament fabric which follows the deformation of the individual diaphragms. When under pressure, this layer (9) is also permeable to liquid. The space (10) containing this (these) layer(s) is connected, in the region of the clamping site, to a leakage offtake (12, 13) surrounded by a housing. The layer (9) can, however, also consist of a fibre reinforcement consisting of a nonwoven, knitted, or woven hard-filament fabric which projects from the diaphragm surface facing the adjacent individual diaphragm. A combination of these types of layers is also possible.
IPC 1-7
IPC 8 full level
F04B 43/02 (2006.01); F04B 43/00 (2006.01)
CPC (source: EP)
F04B 43/009 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9219866 A1 19921112; AT E148202 T1 19970215; DE 59207956 D1 19970306; EP 0582628 A1 19940216; EP 0582628 B1 19970122; JP 3133067 B2 20010205; JP H06506998 A 19940804
DOCDB simple family (application)
DE 9200351 W 19920504; AT 92909856 T 19920504; DE 59207956 T 19920504; EP 92909856 A 19920504; JP 50895392 A 19920504