The ornamental design for an actuator, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawings will be provided by the Office upon request and payment of the necessary fee. The use of color is claimed in the present design patent application.
FIG. 1. is a right side elevational view of the actuator showing my new design;
FIG. 2. is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a front perspective view thereof; and,
FIG. 8 is a front bottom perspective view thereof.