Electromagnetic solenoid valve with variable force motor

Details Electromagnetic solenoid valve with variable force motor Electromagnetic solenoid valve with variable force motor

F - Mech Eng,Light,Heat,Weapons

15

B

F15B 13/043 (2006.01) F16K 31/40 (2006.01) G05D 16/20 (2006.01)

Patent

CA 2046001

An electromagnetic variable force motor circuit comprising a solenoid including a coil, a pole piece associated with the coil and a ball armature. A spring urges the ball armature toward a first seat and away from the pole piece. A first chamber is provided adjacent the first seat, the ball armature and the first seat define a first orifice extending between the ball armature and the first chamber. A first passage provides supply pressure to the first chamber. A second orifice is provided in the first passage. A valve including a movable member responsive to fluid pressure is provided in the first chamber. A second passage provides supply pressure to the valve. A third passage provides control flow from the valve device. A fourth passage provides exhaust flow from the first chamber when the ball armature is moved away from the first seat such that the ball armature controls flow through the first orifice to the fourth passage upon excitation of the coil. The valve is operable to variably restrict flow in the second and third passages.

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