Patent ID: 7779938

Claim:
An apparatus comprising: a swivel comprising first and second sections mounted on one another with relative rotation therebetween; the first section being adapted to mount on a first auger assembly comprising a first cutting head and a first auger mounted thereon; and the second section being adapted to mount on one of (a) a pilot tube which is configured when driven to form an underground pilot hole and which has a diameter smaller than that of the first auger assembly, and (b) a second auger assembly having a diameter larger than that of the first auger assembly and comprising a cylindrical casing, a second cutting head and a second auger mounted on the second cutting head and rotatably disposed in the casing; wherein the second section is adapted to mount on the pilot tube; and further comprising an auger boring machine cutting head; and a torque drive connection comprising first and second couplers between the first section of the swivel and the cutting head; the first and second couplers being slidably connectable by movement toward one another in a first direction and slidably disconnectable by movement away from one another in a second direction opposite the first direction.