Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2007-08-07
2007-08-07
Lee, Kevin (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C251S065000, C251S129160
Reexamination Certificate
active
11034580
ABSTRACT:
An electromagnetic actuator status defines two pairs of poles between which an elongate magnetisable armature can see-saw through a mid position between two home positions defined by two of the poles. A closed low reluctance path in each home position includes a permanent magnet which keeps the armature in either home position. An electromagnet is energised by a current pulse, to repel the armature from one home position and attract it to the other. Resilient energy storage means resists the final movement of the armature towards each pole. A non-magnetisable curved central region of the armature makes rolling contact with a complementary curved surface with the stator to cover and uncover openings therein. The stator is housed within, or forms a fluid chamber and fluid supplied thereto can be delivered selectively through one or the other of the two openings.
REFERENCES:
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patent: 4621660 (1986-11-01), Klocke
patent: 6220299 (2001-04-01), Arvidsson
patent: 6761439 (2004-07-01), Hoen et al.
patent: 6848667 (2005-02-01), Wygnanski
patent: 6935373 (2005-08-01), Wygnanski
patent: 29711175 (1998-09-01), None
patent: 1348671 (1974-03-01), None
patent: 2379726 (2003-03-01), None
patent: WO-02/04851 (2002-01-01), None
Barnes & Thornburg LLP
Camcon Limited
Lee Kevin
LandOfFree
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