Connection assembly

A coupling for connecting a wear member to a base, the coupling including a lock having at least two positions:

• a locked position whereby the wear member is restrained from moving relative to the base and an unlocked position in which the wear member is able to move relative to the base in an unrestrained manner, and wherein moving the lock from the locked position to the unlocked position urges the wear member away from the base, wherein:
• the lock has:
• an axis of rotation;
• and
• an engaging portion having:
• a convex outside wall facing radially away from the axis of rotation;
• and
• a concave inside wall facing radially towards the axis of rotation;
• the outside wall is shaped such that rotation of the lock about its axis of rotation in a first angular direction from the unlocked position to the locked position causes the outside wall to bear against the wear member or the base in order to restrain the wear member from moving away from the base;
• and
• the inside wall is shaped such that rotating of the lock about its axis of rotation in a second angular direction, opposite the first angular direction, from the locked position to the unlocked position causes the inside wall to bear against the wear member or the base in order to urge the wear member away from the base.