Wirth Maschinen-und Bohrgerate-Fabrik GmbH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 393
 
  
 
B66D CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS 120
 
  
 
E21C MINING OR QUARRYING121
 
  
 
E21D SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS 115
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 161

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8186977 Pumping systemFeb 16, 06May 29, 12[F04B]
7232113 Draw worksFeb 19, 03Jun 19, 07[B66D]
5340199 Method and machine for excavating drifts, tunnels, stopes, caverns or the likeNov 06, 92Aug 23, 94[E21D, E21C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7658244 Device for advancing drillings in the groundExpiredJul 18, 03Feb 09, 10[E21B]
7562726 Device for drilling a bore in the groundExpiredMay 07, 04Jul 21, 09[E21B]
7562726 Device for drilling a bore in the groundExpiredMay 07, 04Jul 21, 09[E21B]
2008/0277,637 Lifting MechanismAbandonedOct 12, 04Nov 13, 08[B66D]
6431653 Tunnel-boring machine and method of using the sameExpiredFeb 11, 00Aug 13, 02[E21D]
6405812 Drilling tool for the air-lifting processExpiredOct 10, 00Jun 18, 02[E21B]
6183165 Process and device for separation of pipes or columns fixed in the groundExpiredNov 19, 98Feb 06, 01[E21B]
6102139 Device for drilling a bore hole in the groundExpiredSep 11, 98Aug 15, 00[E21B]
5938288 Automatic control system and method for a machine used for excavating drifts, tunnels, stopes, or cavernsExpiredSep 05, 97Aug 17, 99[E21D, E21C]
4773689 Apparatus for clamping to the end of a pipeExpiredMay 20, 87Sep 27, 88[B66C]
4750770 Device for connecting a drill column to a pipe or the likeExpiredJun 30, 86Jun 14, 88[E21B]
4739680 Apparatus for securing screw bolts against rotationExpiredDec 09, 86Apr 26, 88[B25B]
4696600 Method and apparatus for modifying the cross-sectional profile of an adit, tunnel or the likeExpiredFeb 12, 86Sep 29, 87[E01G]
4655362 Manipulator for cover closure membersExpiredApr 17, 86Apr 07, 87[B65D]
4637659 Tool member for a rotary drilling toolExpiredOct 16, 84Jan 20, 87[E21B]
4565111 Device for rotating and axially moving a boltExpiredMay 21, 84Jan 21, 86[B25B]
4565689 Method for treating the effects of alcoholExpiredApr 12, 85Jan 21, 86[A61K]
4548282 Method for sinking boreholesExpiredMay 17, 83Oct 22, 85[E21B]
4474253 Apparatus for producing an upwardly directed drill holeExpiredDec 16, 83Oct 02, 84[E21B]
4454923 Holding device for boring head tools or the likeExpiredAug 09, 82Jun 19, 84[E21B]

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