Patent ID: 8162240

Claim:
An actor device for an injector comprising an injector housing, a solid-state actuator having an outer perimeter and an axial length extending from a first axial end to a second axial end opposite the first axial end, a first end plate located at and coupled to the first axial end of the solid-state actuator, a second end plate located at and coupled to the second axial end of the solid-state actuator, a rigid sliding body which is rigidly coupled to the first end plate at the first axial end of the solid-state actuator, wherein the rigid sliding body is located outside the outer perimeter of the actuator and extends along a substantial portion of the axial length of the actuator, and which has a clearance to the solid-state actuator and to the second end plate, and a temperature compensation assembly coupled to the actor device such that the temperature compensation assembly and actuator are axially positioned on opposite sides of the first end plate, wherein the temperature compensation assembly compensates for different thermal expansions of the actor device and a housing containing the actor device; wherein the first end plate, the first axial end of the solid-state actuator, the second end plate, and the second axial end of the solid-state actuator are all axially movable relative to the injector housing.