Abstract: An adjusting device for repositioning a movable component relative to a stationary component includes a shank having a head at one end thereof and a distal tip at an opposite end thereof. The adjusting device also includes a first thread formed on the shank, the first thread disposed in a helical pattern along the shank, and a reversing thread formed on the shank, the reversing thread disposed in a helical pattern along the axial surface of the shank, the reversing thread helical pattern is formed in a direction that is opposite to the helical pattern of the first thread. Also described herein is a linear adjustment assembly that includes an adjusting device and a retaining device. The retaining device includes a thread disposed in a helical pattern along an interior surface of the retaining device having a helical pattern that is substantially similar to the first thread helical pattern.

Abstract: An adjuster to be used with numerous applications including the adjusting of a headlamp reflector of a headlamp assembly includes a clutch mechanism that prevents over-driving and over-traveling of the adjuster output shaft during an overload condition. The adjuster includes generally an output shaft, drive gear, spring, and a driven gear that allow the headlamp adjuster to clutch. The driven gear is held in an engaged position with the drive gear by the spring force of the spring. In a high torque condition, such as when the output shaft encounters a high load, the driven gear will disengage from the drive gear overcoming the spring force of the spring. In this position, the headlamp adjuster will clutch, thereby preventing the over-driving and over-traveling of the output shaft.