loose-joint butt

loose-joint butt

[′lüs ¦jȯint ′bət] (design engineering) A knuckle hinge in which the pin on one half slides easily into a slot on the other half.

loose-joint hinge, heave-off hinge, lift-off hinge, loose-joint butt

loose-joint hinge A door hinge having two knuckles, one of which has a vertical pin (at its center) that fits in a corresponding hole in the other; by lifting the door up, off the vertical pin, the door may be removed without unscrewing the hinges.