Patent ID: 7147420

Claim:
A self-locking pin comprising: an elongated shaft; at least one cylindrical re-entrant bore intersecting said shaft; at least one plunger slidably disposed in said bore said plunger having an extended and a retracted position, a recess being formed in said plunger, said plunger including a wedge-shaped portion extendable outwardly of said bore, said wedge-shaped portion including a laterally extending, substantially planar surface; biasing means disposed in said re-entrant bore, and biasing said plunger outwardly of said bore to its extended position; said shaft being staked on at least one side of the entrance of said re-entrant bore to provide a marginal surface extending angularly inwardly relative to the longitudinal axis of said shaft, and further being engagable with said planar surface of said plunger when said plunger is in its extended position to thereby restrain said plunger from rotation within said bore; said bore being deep enough that when the plunger is in its retracted position, the top of the plunger is located below the surface of the marginal surface; a means for rotating said plunger; a means for rotating said plunger whereby said plunger may be retained within said bore by moving said plunger to its retracted position and rotating said plunger.