73220313
Jun 19, 1979
Feb 23, 1982
Stationary and Movable Rock Drilling Rigs; Feeding Apparatus for Rock Drills and Core Drills; Positioning Apparatus for Rock Drills and Core Drills; Rod Handling Equipment Consisting of Mechanized Gripping and Reciprocating Chuck Machinery for Rock Drills and Core Drills; and Accessories for Rock Drills and Core Drills-Namely, Rod Holders, Supports, Wire-Line Hoists and Catheads, Rod Racks, High Torque Gear Boxes, Gripping Chucks, Power Pack Housings, Hydraulic Power Units, Casing Clamps, Flush Pumps, and Hydraulic Rod Tongs
Machinery