Electromagnetic valve device

An electromagnetic valve device comprising:

• a valve body provided with a first fluid chamber, an inlet passage, and an outlet passage, said inlet and outlet passages being in fluid communication with said first fluid chamber;
• an electromagnet device fixed to said valve body;
• a sleeve member positioned in said first fluid chamber and fixed to said valve body, said sleeve member having an interior;
• a first movable member slidably positioned within the interior of said sleeve member and defining a second fluid chamber within said sleeve member, said first movable member having a first valve portion positioned in said first fluid chamber for selectively establishing and interrupting unrestricted fluid communication between said first fluid chamber and said inlet fluid passage, a first return spring for urging said first movable member in a first direction towards a first position to establish unrestricted fluid communication between said first fluid chamber and said inlet fluid passage, said second fluid chamber being in continuous fluid communication with said first fluid chamber through an orifice and being in fluid communication with said inlet fluid passage through an additional fluid passage provided within said first movable member;
• a second movable member operatively connected to said electromagnet device and having a second valve portion positioned in said second chamber for selectively establishing and interrupting fluid communication between said second fluid chamber and said inlet fluid passage, a second return spring for urging said second movable member to a non-energized position in which fluid communication between said second fluid chamber and said inlet fluid passage is established through said additional passage when said first movable member is positioned in said first position, said second movable member being movable by said electromagnet device from the non-energized position to an energized position in which fluid communication between said second fluid chamber and said inlet fluid passage is interrupted, movement of said second movable member to said energized position causing said first movable member to move from said first position to a second position in which unrestricted fluid communication between said first fluid chamber and said inlet fluid passage is interrupted;
• and
• means for providing a fluid pressure force against the first movable member sufficient to maintain the first movable member in the second position when the second movable member is in the non-energized position until a pressure differential between the pressure at the outlet fluid passage and the pressure at the inlet fluid passage is less than a predetermined value.