Gebr. Hofmann GmbH & Co. KG Maschinenfabrik

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5243788 Grinding wheel balancing method and apparatusExpiredAug 15, 90Sep 14, 93[B24B, G01M]
5178011 Method and apparatus for balancing successive rotary membersExpiredAug 15, 90Jan 12, 93[G01M]
5138882 Method and apparatus for measuring static unbalance of a rotary memberExpiredMay 15, 90Aug 18, 92[G01M]
5125271 Method and apparatus for balancing a rotorExpiredApr 15, 91Jun 30, 92[G01M]
5067347 Method and apparatus for testing a pneumatic tireExpiredJul 19, 90Nov 26, 91[G01M]
5067348 Rotary member measuring apparatus with improved support bedExpiredApr 19, 90Nov 26, 91[G01M]
5058429 Apparatus for measuring an unbalance of a rotary memberExpiredFeb 13, 90Oct 22, 91[G01M]
5040413 Pneumatic tire uniformity testing process and apparatusExpiredMay 10, 90Aug 20, 91[G01M]
5033302 Rotary balancing machine mounting assembly with integral calibration deviceExpiredJan 03, 90Jul 23, 91[G01M]
5027649 Process and apparatus for testing the uniformity of pneumatic tiresExpiredMay 10, 90Jul 02, 91[G01M]
5019017 Monitoring arrangement for a drive beltExpiredFeb 05, 90May 28, 91[G01L, F16H]
5016470 Apparatus for testing motor vehicle tiresExpiredJul 27, 90May 21, 91[G01M]
4989449 Method and apparatus for determining a restoring moment produced by tagential forces in a tire testing operationExpiredJan 18, 90Feb 05, 91[G01M]
4980621 Control arrangement for controlling the power supplied to an electric motorExpiredNov 20, 89Dec 25, 90[G01M, H02P]
4964299 Apparatus for measuring, in a tire testing machine, radial and axial forces at a wheel consisting of a pneumatic tire and a rimExpiredJul 15, 88Oct 23, 90[G01M]
4955229 Method and apparatus for determining the uniformity of pneumatic tiresExpiredOct 20, 89Sep 11, 90[G01M]
4941352 Method and apparatus for mass centering of a rotorExpiredMay 05, 89Jul 17, 90[G01M]
4923326 Clamping ring for clamping a member on a shaft and apparatus incorporating the clamping ringExpiredFeb 10, 89May 08, 90[F16D]
4918983 Apparatus for checking motor vehicle tiresExpiredApr 28, 89Apr 24, 90[G01M]
4916943 Apparatus for monitoring and controlling the tire inflation pressure in a tire testing machineExpiredJul 13, 89Apr 17, 90[G01M]

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