WIRTH Trademark

Measuring, surveillance, control and regulating apparatus and appliances, namely electric shut-off switches for drilling units and for machining and appliances for drilling and driving tunnels, sections, shafts and cavities

Drilling machines and parts therefor, namely, rotary table drilling rigs, core drilling rigs, water well, pile foundation, shaft, large-diameter, blast-hole, investigation, injection and anchor-hole drilling units, air-lift and jet drilling units, and drilling installations comprising drilling rigs, and apparatus for their operation, namely draw works and winches, rotary tables, rotary swivels and top drives, gearboxes, namely, compound gears, motor drives, master bushings for rotary tables; Drilling machines and parts therefor, namely, core drill rigs, water-well drill rigs, pile-top drill rigs, shaft boring rigs, large-diameter drill rigs, injection drill rigs, anchor-hole drill rigs, reverse-circulation drill rigs, jet drill rigs, gearings and motor drives for the operation of these drilling rigs, all for use with water economy, civil engineering, mining, marine technology and exploration drilling purposes; units and apparatus for pile foundation purposes, namely, foundation work machines; rotary drilling machines and parts therefor, namely, rigs for drilling onshore and offshore, comprising derricks, draw works, transmissions and motor drives; mechanical equipment for use in drilling machines and parts therefor, namely, lattice mast cranes, travelling block brakes, lifting installations for the transport of machines, winches, gears and enclosed drives for industrial machinery, compressors for machines, shut-off elements, namely valves being parts of drilling machines, vibratory screen separators, drill-pipe adding and handling equipment, namely, power operated pipe layers, fork lifts and lifts, drill pipe racks, power swivels being parts of drilling machines, casing machines for casing bores and tunnels, swivels for drill pipes, rotary tables for drill pipes, machine parts, namely, Kelly bushings, parts for the aforesaid units and machines; drill pipes and their corresponding parts being parts of drilling machines, namely, pipes, junction pieces, connecting pieces, stabilizers and drill-collars; mechanical tools for the installation and removal of drill pipes, all for drilling technique purposes; machines and mechanical appliances for drilling and driving of tunnels, sections, shafts and cavities, namely, full-diameter, enlargement, jacket tunnel, shaft, and large-diameter boring machines, shaft sinkers, trailers and trailer mounted machines. namely back-up systems and anti-return structures in inclined galleries for machinery and mechanical equipment for boring and driving tunnels. sections. shafts and cavities; parts of all the aforesaid machines and appliances; mechanical appliances and apparatus for the installation of linings, namely tunnel lining installation equipment for machinery and mechanical equipment for boring and driving tunnels, sections, shafts and cavities; transporting apparatus and appliances for conveying muck and debris for the aforesaid machines and appliances, namely, conveyors; mechanically-operated tools, namely, cutter heads and outfits for drilling units; machines and appliances for drilling and driving of tunnels, sections, shafts and cavities, namely, drill bits for rock drilling, milling cutters, large-diameter rock drilling bits, enlarging bits for rock drilling, eccentric bits for rock drilling, under reamers, step bits for rock drilling, full-diameter crown drills, reamers, earth augers, spoon earth augers, buckets being parts of earth augers, coring units, namely, core drilling bits, elevators; high-pressure hydrostatic, piston pumps and plunger pumps, with mechanical drives and with pressure medium drives, namely, slush and mud pumps for drilling units, delivery pumps, pumps for solid conveyance and parts for the aforesaid pumps; tensioning apparatus and appliances operating on a pressure medium basis, namely, tightening machines for screw and bolt connections and assemblies for pre-tensioning expansion bolts for closures and for the fixing of parts to be connected in reactors