Patent ID: 6418967
Filing Date: 2002-07-16
Classification: G05D,Y10T

Abstract:
A pressure regulating valve comprising:a valve housing (1) defining a pressure regulating chamber (7) therein, the pressure regulating chamber (7) having an inlet (3) for connection to a supply pressure line (P), the pressure regulating chamber (7) having a first outlet for connection to a working pressure line (A), and the pressure regulating chamber having a second outlet (11) for connection to an ambient pressure line (T); an inlet valve (5) for controlling flow of a pressurized fluid from the pressure line (P) through the inlet (3) into the pressure regulating chamber (7) and an outlet valve for controlling flow of the pressurized fluid from the pressure regulating chamber (7) through the second outlet (11); and an electromagnetically controlled armature (13) coupled to an armature rod (10) with a remote second end of the armature rod (10) supporting a control shift valve member (12), and the electromagnetically controlled armature (13) and the armature rod (10) being simultaneously movable along a longitudinal axis (A) of the pressure regulating valve, via an electromagnet, relative to the pressure regulating chamber to facilitate opening and closing of the inlet valve (5) via the valve member (12); wherein a surface circumscribing and adjacent the second outlet (11) is planar and a leading portion of a surface supported by the armature rod (10), and spaced from the electromagnetically controlled armature (13), forms a movable sealing surface which is planar, the movable planar sealing surface supported by the armature rod (10) and the planar surface circumscribing the second outlet (11) both lie in planes which extend normal to the longitudinal axis (A) of the pressure regulating valve, and when the movable planar sealing surface engages with the planar surface circumscribing the second outlet (11), the second valve is closed to prevent flow of the pressurized fluid therethrough, and when the movable planar sealing surface is spaced from the planar surface circumscribing the second outlet (11), the second valve is open and permits flow of the pressurized fluid therethrough.