Low power electromagnetic valve

Details Low power electromagnetic valve Low power electromagnetic valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 31/04 (2006.01) A61M 5/142 (2006.01) F16K 31/06 (2006.01) H01F 7/16 (2006.01)

Patent

CA 2144863

An electromagnetic valve (10) comprising a housing (12) having a fluid containing region (14) and first and second ports (18, 20) in communication with the region (14), an electromagnet (130) carried by the housing (12) located external to the fluid containing region (14), of the housing (12), and a barrier in the form of a thin diaphragm (160) of fluid impermeable material which hermetically isolates the electromagnet (130) from the fluid containing region (14). An armature (200) is movably posi- tioned in the region (14) and has a pole portion (204) located for magnetic attraction by the electromagnet (130) and has a plung- er portion (202) provided with a valve formation (250) for opening and closing one of the ports (18, 20) to place both ports (18, 20) in fluid communication through the fluid containing region (14) of the housing (12) in one control state of the valve (10) and to block fluid communication between the ports (18, 20) in another control state of the valve (10). The armature (200) is moved from a rest position through a forward stroke when attracted by the electromagnet (130) to change the control state of the valve (10), and the armature (200) is moved by a biasing spring (244) in an opposite direction through a return stroke back to a rest po- sition.

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