Fortuna-Werke Maschinenfabrik GmbH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5251405 Method for circumferential grinding of radially non-circular workpiecesExpiredJul 24, 91Oct 12, 93[B24B]
5193953 High-speed drilling or milling spindleExpiredAug 12, 91Mar 16, 93[F16C, B23C]
4934106 Grinding machineExpiredSep 13, 88Jun 19, 90[B24B]
4920945 Method for dressing grinding wheelsExpiredDec 20, 88May 01, 90[B24B]
4907375 Grinding wheelExpiredDec 20, 88Mar 13, 90[B24B]
4905418 Process for grinding cams of a camshaftExpiredMay 15, 89Mar 06, 90[B24B]
4892082 Dressing roll and method for producing the sameExpiredDec 20, 88Jan 09, 90[B24B]
4885874 Method of grinding two or more cams of a camshaftExpiredJan 27, 88Dec 12, 89[B24B]
4766700 Method and apparatus for determining the position of a workpiece in an NC-controlled machineExpiredDec 18, 85Aug 30, 88[B24B]
4764085 Blower for circulating larger gas volumes, in particular for high-power laser systems operating according to the gas-transportation principleExpiredDec 24, 86Aug 16, 88[F04D]
4764086 Blower for circulating larger gas volumes, in particular for high-power laser systemsExpiredDec 24, 86Aug 16, 88[F04D]
4747236 Method for working, by metal-cutting processes, the surfaces of profiles having a non-circular contour, in particular camshaftsExpiredAug 13, 86May 31, 88[B24B]
4746252 Spindle of a machine toolExpiredMay 20, 87May 24, 88[B23B, B23C]
4731954 Method and apparatus for initiating an operation for dressing a grinding wheel in conformity with its degree of bluntnessExpiredAug 13, 86Mar 22, 88[B24B]
4382253 Method for measuring abrasion in a grinding operation and apparatus thereforExpiredFeb 11, 80May 03, 83[G08B]
4324073 Process for automatic feed of steady jawsExpiredDec 10, 79Apr 13, 82[B24B]
4210051 Band knife splitting machine feed roll arrangementExpiredSep 28, 78Jul 01, 80[B26D]
4181994 Apparatus for manufacturing shoesExpiredNov 28, 77Jan 08, 80[A43D]

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