Wilhelm Hegenscheidt GmbH

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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 254
 
  
 
B21K MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, WHEELS 221
 
  
 
B21H MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS 17

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE35519 Method and apparatus for smooth-rolling and deep-rolling multi-stroke crankshaftsAug 11, 94May 27, 97[B21K]
5333480 Method for straightening out of true work pieces, especially crankshaftsJul 23, 93Aug 02, 94[B21H, B21D]
5235838 Method and apparatus for truing or straightening out of true work piecesJan 22, 92Aug 17, 93[B21D]
5138859 Method and apparatus for smooth-rolling and deep-rolling multi-stroke crankshaftsApr 25, 91Aug 18, 92[B21K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5019115 Method and apparatus for producing fractured chips when performing a turning operationExpiredJun 08, 89May 28, 91[B23B]
5001917 Method and apparatus for truing or straightening out of true work piecesExpiredJul 11, 88Mar 26, 91[B21H, B21D]
4947668 Rolling milling toolExpiredJun 08, 89Aug 14, 90[B24B, B21B]
4939962 Method and apparatus for influencing the motion of a movable memberExpiredMay 09, 89Jul 10, 90[B23B]
4922739 Roller milling tool unit for a milling machine toolExpiredJul 27, 89May 08, 90[B21H]
4895057 Machine tool for broaching crankshaft connecting rod bearingsExpiredOct 16, 87Jan 23, 90[B23B]
4866642 Method and apparatus for determining the diameter of rail vehicle wheelsExpiredJul 10, 87Sep 12, 89[G01V]
4861204 Turn broaching toolExpiredOct 16, 87Aug 29, 89[B23C]
4825737 Lifting mechanism especially for a wheel set in a truing machineExpiredJun 15, 87May 02, 89[B23B]
4802285 Method and apparatus for ascertaining the radial location of a new wheel profile to be produced by a reprofiling operationExpiredJun 15, 87Feb 07, 89[G01B]
4799839 Method and apparatus for performing a rotary broaching operation particularly on work pieces of rotational symmetryExpiredOct 16, 87Jan 24, 89[B23D]
4798963 Apparatus for monitoring and measuring the quality of rail wheel still mounted beneath a rail vehicle without directly contacting the rail wheelsExpiredAug 04, 86Jan 17, 89[G01N]
4798964 Method and apparatus for the contactless measuring of the tread quality of railroadExpiredAug 04, 86Jan 17, 89[G01V]
4782680 Method for rolling a shaft or tenon having cross-bored holesExpiredMay 13, 87Nov 08, 88[B21H]
4782682 Rolling Mill ToolExpiredMay 13, 87Nov 08, 88[B21H]
4766753 Rolling apparatus for surface hardening or smoothingExpiredAug 29, 86Aug 30, 88[B21K]
4749870 Method and apparatus for measuring data for calculating the diameter of wheels, especially railroad wheel setsExpiredJun 19, 86Jun 07, 88[G01V]
4747285 Surface-hardening or smoothing rolling machineExpiredAug 29, 86May 31, 88[B21K]
4747286 Rolling apparatusExpiredAug 29, 86May 31, 88[B21K]
4711146 Method for reprofiling profiles of wheel setsExpiredMar 17, 87Dec 08, 87[B23B]

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