EP 1113174 A2 20010704 - Double-diaphragm pumps
Title (en)
Double-diaphragm pumps
Title (de)
Doppelmembranpumpe
Title (fr)
Pompe à membrane double
Publication
Application
Priority
GB 9930809 A 19991230
Abstract (en)
A double diaphragm pump comprises a pair of axially spaced apart pumping chambers (1,2), each chamber has a pumping diaphragm (3,4) to divide each chamber into an inner (5,6) and an outer compartment (7,8). The outer end of each pumping chamber is closed by a cover (9,10) and the inner ends of both pumping chambers (1,2) are closed by a central element (11). Connection cylinder (12) extend between the diaphragms (3,4) and through the central element (11). The supply (13) of operating fluid to the outer compartments (7,8) causes the diaphragms (3,4) to oscillate and vary the capacities of the inner compartments (5,6). Each of the inner compartments (5,6) has an inlet (14) and outlet port (15) leading to unidirectional valves (16,17) to allow fluid to be drawn into one of the compartments (5,6) when the appropriate diaphragm (3,4) moves outwardly and expelled from that compartment when the diaphragm moves inwardly. The central element has a unitary partition wall (20) which extends between and closes the inner ends of the inner compartments (5,6), said wall being substantially solid over a major portion of its area apart from a sealed aperture (21) to allow the connection cylinder (12) to pass through it and being enlarged at its outer periphery (22) to carry the inlet and outlet ports (14,15) which are located respectively at the lower and upper portions of the element (11). <IMAGE>
IPC 1-7
IPC 8 full level
F04B 43/073 (2006.01); F04B 53/08 (2006.01)
CPC (source: EP US)
F04B 43/0736 (2013.01 - EP US); F04B 53/08 (2013.01 - EP US)
Citation (applicant)
- EP 0181756 A1 19860521 - FLOTRONICS AG [CH]
- EP 0132913 A1 19850213 - FLOTRONICS AG [CH]
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1113174 A2 20010704; EP 1113174 A3 20020102; GB 0030886 D0 20010131; GB 2357811 A 20010704; GB 9930809 D0 20000216
DOCDB simple family (application)
EP 00311302 A 20001218; GB 0030886 A 20001218; GB 9930809 A 19991230