High-speed solenoid valve for a fluid under pressure, e.g. for pneumatic circuits

A high speed solenoid valve for a fluid under pressure, e.g. for pneumatic circuits, comprising first and second coaxial members of non-magnetic material for forming a body and defining a chamber, the first member being integral with an inlet duct for the fluid, and the second member being integral with at least one outlet duct for the fluid, said inlet duct and said outlet duct opening into said chamber, said ducts being disposed with their axes parallel to the axis of said first and second members, at least one of said ducts being coaxial with said first and second members, a shut-off disc for the fluid in said outlet duct, and an electromagnet arranged in said chamber for controlling said disc, said electromagnet comprising a magnetic coil and a magnetic circuit both secured to said first member and constantly acted upon by the fluid under pressure, said electromagnet further comprising an armature plate maintained in contact with a pivot member perpendicular to the axis of said outlet duct, said disc being secured to a surface of said plate facing toward said outlet duct, whereby said fluid under pressure normally, maintains said plate with said disc in the closed configuration of said outlet duct, said coil being wound around an axis parallel to the axis of said outlet duct, said magnetic circuit comprising a portion outside said coil and constantlly in contact with said plate, said plate additionally being applied against a second portion of said magnetic circuit inside said coil when the latter is energized, said coil being electrically connected to a pair of electrical terminals provided on a printed circuit board secured to said first member, a pair of electric leads passing through a hole in said first member being connected to said board, an element consisting of elastomeric material being inserted between said board and said first member so as to effect a seal between said hole and said chamber.

A high speed solenoid valve for a fluid under pressure, e.g. for pneumatic circuits, comprising first and second members of non-magnetic material for forming a body and defining a chamber, an inlet duct for the fluid carried by said first member, at least one outlet duct for the fluid carried by said second member said inlet duct and said outlet duct opening into said chamber, a shut-off disc for the fluid in said outlet duct, and an electromagnet arranged in said chamber for controlling said disc, said electromagnet comprising a magnetic coil and a magnetic circuit both secured to said first member and constantly acted upon by the fluid under pressure, said electromagnet further comprising an armature plate maintained in contact with a pivot member perpendicular to the axis of said outlet duct, said disc being secured to a surface of said plate facing toward said outlet duct, whereby said fluid under pressure normally maintains said plate with said disc in the closed configuration of said outlet duct, said coil being electrically connected to a pair of electrical terminals provided on a printed circuit board secured to said first member, a pair of electric leads passing through a hole in said first member being connected to said board, an element consisting of elastomeric material being inserted between said board and said first member so as to effect a seal between said hole and said chamber.