Barrier cable coupler

1. A barrier cable coupler for coupling two lengths of barrier cable comprising:

a coupler body, the coupler body including a threaded inner surface, the coupler body having a first end and a second end;

a fixed retaining collar, the fixed retaining collar having an outer surface, the fixed retaining collar retained to the first end of the coupler body, the fixed retaining collar including a tapered inner surface;

one or more fixed end wedges positioned within the tapered inner surface of the fixed retaining collar;

a tensioning retaining collar, the tensioning retaining collar having an outer surface, the tensioning retaining collar positioned at least partially within the second end of the coupler body, the tensioning retaining collar including a tapered inner surface;

one or more tensioning end wedges positioned within the tapered inner surface of the tensioning retaining collar; and

a tensioning nut, the tensioning nut including a threaded outer surface engaging the threaded inner surface of the second end of the coupler body and retaining the tensioning retaining collar therein whereby rotation of the tensioning nut causes the tensioning retaining collar to advance into the coupler body, thereby decreasing the distance between the fixed end wedges and the tensioning end wedges;

wherein the diameter of the tapered inner surface of the tensioning retaining collar is smallest where the tensioning retaining collar is held by the tensioning nut; and

wherein the tensioning nut is adapted to be completely received in the coupler body and adapted to be advanced into the coupler body using a tensioning wrench that extends into the coupler body.

2. The barrier cable coupler of claim 1 wherein the outer surface of the fixed retaining collar is threaded and engages the threaded inner surface of the coupler body.

3. The barrier cable coupler of claim 1 wherein at least one of the first and second coupler body ends further comprises:

an end spring cap retained within the coupler body; and

an end spring in compression between the end spring cap and the one or more fixed end wedges.

4. The barrier cable coupler of claim 3 wherein the end spring cap further comprises a threading fastener.

5. The barrier cable coupler of claim 3 wherein the end spring cap is not threaded and engages the inner surface of the coupler body by friction.

6. The barrier cable coupler of claim 1 wherein the barrier cable coupler further including a means for preventing rotation of the fixed retaining collar relative to the coupler body.

7. The barrier cable coupler of claim 6 wherein the means for preventing rotation is a lock nut.

8. The barrier cable coupler of claim 1 wherein the coupler body has a coupler body outer surface and a cross-section that is square, hexagonal, partially square, or partially hexagonal.

9. The barrier cable coupler of claim 8 wherein the coupler body outer surface includes one or more outer surface gripping features.

10. The barrier cable coupler of claim 1 wherein the outer surface of the tensioning retaining collar is not threaded.

11. The barrier cable coupler of claim 1 wherein the tensioning nut includes a driving head.

12. The barrier cable coupler of claim 1 wherein the tensioning nut can be rotated without rotating the tensioning retaining collar.