also has a protrusion 40 that is located between a pair of features 42 and 44 of worm gear 20 such that as worm gear 20 rotates in one direction e g clockwise from a home or central position and the actuator 10 is in the locked position illustrated in fig3 and 4 feature 42 will contact protrusion 40 and thus rotate gear 26 clockwise and accordingly move rack 12 linearly in the direction of arrow 46 between a first position and a second position with respect to the actuator 10 so that the actuator is now in the locked position illustrated in fig5 and 6 after this movement the worm gear 20 returns to the home or central position illustrated in fig3 and 4 via counter clockwise movement while gear 26 stays in the position illustrated in fig5 and 6 in other words and when viewing fig3 6 clockwise movement of the worm gear 20 from the central or home position of fig3 and 4 will move gear 26 clockwise and rack in the direction of arrow 46 afterwards worm gear 20 is spring biased to rotate counter clockwise back to the home or central position illustrated in fig3 and 4 as well as fig5 and 6 via a return spring 48 however gear 26 and rack 12 stay in the position illustrated in fig5 and 6 when the actuator is in the position illustrated in fig5 and 6 feature 44 of the worm gear is adjacent to protrusion 40.