Patent ID: 6129163
Filing Date: 2000-10-10
Classification: E21B,Y10T

Abstract:
A flightless rock auger for removing plugs of hard material from post holes, comprising:a cylindrical hollow cutting head comprising a hollow cylindrical body defining side walls connecting a top end defining an upper periphral edge and a lower open end defining a lower periphral cutting edge including a plurality of teeth extending from said lower peripheral edge;said top end of said hollow cylindrical body including at least one support member extending across at least a portion of said top end joining said side walls;a shaft having a diameter less than said cutting head, said shaft including a proximal end connecting to said at least one support member and having an opposing distal end extending therefrom; anda quick disconnect coupling disposed upon said opposing distal end of said shaft, said disconnect including means for floating attachment to a drive shaft of a power unit providing limited vertical movement therebetween to exert floating pressure of said head and said shaft on said hard material by their own weights.