Ernst Grob AG

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 452
 
  
 
B21J FORGING; HAMMERING; PRESSING; RIVETING; FORGE FURNACES 317
 
  
 
B25G HANDLES FOR HAND IMPLEMENTS 212
 
  
 
B21B ROLLING OF METAL 131
 
  
 
B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL120
 
  
 
B21K MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, WHEELS 122
 
  
 
B23F MAKING GEARS OR TOOTHED RACKS 115
 
  
 
F16D COUPLINGS FOR TRANSMITTING ROTATION 190

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9174291 Apparatus and method for manufacturing thick-walled hollow wheels having an internal gear toothingMar 14, 13Nov 03, 15[B21K, B21J, B23F]
8117884 Method for producing internal and external toothings on thin-walled, cylindrical hollow partsJul 15, 05Feb 21, 12[B23P, B21J, B21C]
7955020 Grooved profile for a hub shaft connectionJun 14, 04Jun 07, 11[F16D, B25G]
7874760 Tooth profile of a spline shaftFeb 19, 04Jan 25, 11[B25G]
7861572 Method and device for making at least partly profiled tubesSep 05, 03Jan 04, 11[B21D]
7562549 Device and method for producing tooth-like profiled sections on workpiecesFeb 06, 04Jul 21, 09[B21B]
6345526 Punching and stamping machine and method of making parts using sameJul 27, 00Feb 12, 02[B21J]
5471858 Apparatus and process for the production of a hollow workpiece being profiled in a straight or helical manner relative to the workpiece axisMar 02, 93Dec 05, 95[B21D]
5355706 Process for the production of a hollow workpiece being profiled at least internally in a straight or helical manner relative to the workpiece axisJul 02, 93Oct 18, 94[B21D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6089065 Process and arrangement for the cold forming of hollow workpiecesExpiredNov 24, 98Jul 18, 00[B21H]
5765419 Method and apparatus for a rolling of hollow articlesExpiredDec 19, 96Jun 16, 98[B21D]
5580327 Hollow wheel for a sun-and-planet toothed wheel gearingExpiredJul 12, 95Dec 03, 96[F16H]
5546781 Process for the production of a toothed rack via cold forming, the rack produced thereby, and an apparatus for practicing the processExpiredJan 21, 94Aug 20, 96[B21H]
5001916 Method for the calibrated cross-section reduction of a workpiece rotating during such method.ExpiredSep 11, 89Mar 26, 91[B21B]
4872250 Method for fabricating a dished hollow body possessing a linear or helical inner toothingExpiredSep 17, 87Oct 10, 89[B21D]
4796345 Method of fabricating a rim gear, such as a starter rim gear made of sheet metalExpiredJul 20, 87Jan 10, 89[B21D]
4388818 Method and apparatus for fabricating precision teethExpiredSep 04, 81Jun 21, 83[B21H]
4307592 Cold rolling method and cold rolling apparatusExpiredAug 24, 79Dec 29, 81[B21H]

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