Normally closed solenoid valve

Details Normally closed solenoid valve Normally closed solenoid valve

F - Mech Eng,Light,Heat,Weapons

16

K

251/14

F16K 31/02 (2006.01) F16K 31/40 (2006.01)

Patent

CA 1106826

NORMALLY CLOSED SOLENOID VALVE Abstract of the Disclosure A poppet valve arranged to remain in an open condi- tion notwithstanding reverse fluid flow through the valve includes an outer casing having a first bore means and a second bore means. A poppet within the outer casing is movable axially between an open valve position and a closed valve position. The poppet includes an input orifice communicating with the first bore means and an output orifice communicating with the second bore means. A plunger, also within the outer casing and having a tip end is axially movable within the outer casing between a first position for moving the poppet into the closed valve position with the tip end blocking the output orifice of the poppet and a second po- sition to unblock the output orifice and to permit fluid to flow from the first bore means, through the input orifice, through the output orifice, and through the second bore means for causing the poppet to move into the open valve position allowing unrestricted fluid flow through the valve between the first and second bore means. Fluid flow restricting means disposed between the output orifice and the second bore means restricts fluid flow between the output orifice and the second bore means to one direction to permit the valve to open while precluding the valve from closing upon reverse fluid flow through the valve from the second bore means to the first bore means.

333636

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