Abstract: A method of rapid earth excavation without damaging buried pipe, cable or other underground objects utilizes drills and augers having soft cutting edges and/or control of the torque and weight of the boring apparatus. In one embodiment, the bit of a drill, or bottom end of an earth auger is equipped with inserts formed of soft polymeric material. Another embodiment of an earth auger apparatus has soft polymeric material on the leading cutting surface of the flight, or the auger flight may be formed of soft polymeric material. The flexibility and low abrasion of the polymeric material prevents damage to the object contacted. Another embodiment has a dual concentric auger with a small earth-auger rotatably mounted inside the shaft of a larger auger and driven independently such that each is capable of providing and maintaining a torque adequate to create a given hole diameter but sufficiently below that which would damage the object expected to be encountered.

Abstract: A bridle bit for horses comprises a mouthpiece to be received in the mouth of a horse. A head stall ring member is rotatably mounted through the outward ends of the mouthpiece member has a portion extending through the mouthpiece outward ends secured to a cylindrical cheek piece member which rotates therewith. The cheek piece members extend forwardly from the outward ends of the mouthpiece member and reside closely adjacent the cheek of the horse and a rein ring member is rotatably mounted on each cheek piece member extending forwardly therefrom and the forward end is adapted to receive rein apparatus. The head stall ring member may also have a slot adapted to receive a curb chain. The mouthpiece members move independently of one another, the head stall and cheek piece members rotate about their longitudinal axis as a unit relative to the mouthpiece members, and the rein ring members rotate about their longitudinal axis relative to the mouthpiece members and the cheek piece members.