Patent ID: 8132767

Claim:
A threaded rod hanger comprising: a housing having a tapered bore therein, wherein the tapered bore has a wide end and a narrow end; and a threaded rod locking mechanism, wherein the threaded rod locking mechanism includes: plunger pieces movable within the tapered bore, wherein the plunger pieces have sloped outer surfaces that engage the bore, and threaded inner surfaces; and a spring within the tapered bore providing a spring force biasing the plunger pieces toward the narrow end of the tapered bore; wherein contact between the outer surfaces of the plunger pieces and a bore surface at the narrow end of the tapered bore drives the plunger pieces toward one another and toward an axis of the tapered bore; wherein the spring is a coil spring; wherein one end of the coil spring is in contact with the plunger pieces; wherein the coil spring has a shoulder coil at the one end of the spring that is smaller than other coils of the spring; and wherein the shoulder coil is in contact with the plunger pieces.