Compact overrunning coupling and control assembly having reduced part count and manufacturing complexity

An overrunning coupling and control assembly comprising:

• first and second coupling members including first and second coupling faces, respectively, in close-spaced opposition with one another, at least one of the members being mounted for rotation about an axis;
• a control element mounted for controlled shifting movement between the coupling faces;
• a housing having an outer surface, an inner surface which defines a bore within the housing and a control port which extends between and fluidly communicates the inner and outer surfaces of the housing to transmit a control pressure signal into the housing wherein the first coupling member and the housing are formed as a unitary component having a common wall separating and shared by the first coupling member and the housing, the wall having an elongated slot which extends between and fluidly communicates the inner surface of the housing and an inner surface of the first coupling member;
• an actuator arm coupled to the control element to move the control element along a shift direction substantially parallel to a direction in which the slot is elongated, the actuator arm moving the control element from a first position which corresponds to a first mode of the assembly to a second position which corresponds to a second mode of the assembly and back to the first position;
• an actuator piston disposed within the bore of the housing and having an outer surface in sliding contact with the inner surface of the housing and a groove formed in the outer surface of the piston to receive and retain a free end portion of the actuator arm therein so that the actuator arm moves when the piston moves;
• and
• a biasing member disposed within the bore of the housing to exert a biasing force on the piston, the control pressure signal within the housing causing the piston to slide within the bore against the biasing force of the biasing member to move the actuator arm and, in the absence of the control pressure signal, the biasing member moves the piston and, consequently, the actuator arm.