EP 1836394 A2 20070926 - ACTIVE VALVE AND ACTIVE VALVING FOR PUMP
Title (en)
ACTIVE VALVE AND ACTIVE VALVING FOR PUMP
Title (de)
AKTIVES VENTIL UND AKTIVE VENTILSTEUERUNG FÜR EINE PUMPE
Title (fr)
VALVE ACTIVE ET ENSEMBLE DE VALVES ACTIVES POUR POMPE
Publication
Application
Priority
- US 2005047354 W 20051230
- US 2493704 A 20041230
Abstract (en)
[origin: US2006147329A1] A pump ( 20, 120, 320, 420 ) comprises a pump body ( 22 ); an actuator ( 26 ); and, one or more active valves ( 30, 32 ). The pump body at least partially defines a pumping chamber ( 28 ) which has an inlet port ( 29 ) and an outlet port ( 31 ). The actuator ( 26 ) is situated at least partially in the pumping chamber for acting upon a fluid in the pumping chamber. The active valve ( 30, 32 ) selectively opens and closes a port with which it is aligned, e.g., either the inlet port ( 20 ) or the outlet port ( 31 ). In some embodiments, the active valve ( 30, 32 ) comprises a piezoelectric element ( 40 ) which responds to voltage for the selective opening and closing of its aligned port. In an illustrated embodiment, the piezoelectric element is a piezoceramic film ( 42 ). In one implementation of the pump, both the inlet valve ( 30 ) and the outlet valves ( 32 ) are active valves. In another implementation of the pump, the inlet valve ( 30 ) is an active valve but the outlet valve ( 323 ) is a passive valve (e.g., is influenced by flow of fluid in the pump). In other embodiments, active valves operate in accordance with magnetic forces and have electric conductors ( 64 ) or wiring embedded or otherwise formed therein in a coil shape to form a magnetic field. In addition, the ports which host the magnetically activated active valves have a magnet ( 60 ) formed therearound. In some embodiments, when an electric current is applied to the circuit in the valve, the direction of electric flow in the conductors in the flexible valve is such that the magnetic field created thereby attracts the magnetic field extant at the port opening to close the valve.
IPC 8 full level
F04B 7/00 (2006.01)
CPC (source: EP US)
F04B 7/00 (2013.01 - EP US); F04B 7/0076 (2013.01 - EP US); F04B 43/046 (2013.01 - EP US); F16K 99/0001 (2013.01 - EP US); F16K 99/0007 (2013.01 - EP US); F16K 99/0046 (2013.01 - EP US); F16K 99/0048 (2013.01 - EP US); F16K 99/0057 (2013.01 - EP US); F16K 99/0034 (2013.01 - EP US); F16K 2099/0094 (2013.01 - EP US)
Citation (search report)
See references of WO 2006074036A2
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 NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
US 2006147329 A1 20060706; EP 1836394 A2 20070926; JP 2008527232 A 20080724; WO 2006074036 A2 20060713; WO 2006074036 A3 20090430
DOCDB simple family (application)
US 2493704 A 20041230; EP 05855847 A 20051230; JP 2007549612 A 20051230; US 2005047354 W 20051230