Burr Oak Tool and Guage Company, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6644079 Hairpin bender with leg length measurement and adjustment featureExpiredDec 21, 01Nov 11, 03[B21D]
2003/0079,590 Tube straightener and drive thereforAbandonedDec 10, 02May 01, 03[B26D, B23Q]
2003/0061,925 Apparatus for cutting an elongate tubeAbandonedSep 23, 02Apr 03, 03[B26D, B23D]
6494353 Tube feeding apparatusExpiredNov 16, 01Dec 17, 02[B65H, B21C]
6354126 Tube straightener and drive thereforExpiredApr 25, 00Mar 12, 02[B21D]
6176006 Rod lock and unlock mechanism for a mechanical tube expanderExpiredSep 21, 99Jan 23, 01[B23P]
5927175 Stationary and indexable cutterExpiredSep 05, 97Jul 27, 99[B26D]
5901596 Tube bender loader and unloaderExpiredApr 17, 98May 11, 99[B21C]
5752312 Tube transfer deviceExpiredSep 30, 96May 19, 98[B23P]
5632080 Tube cutter/bender to lacer transfer stationExpiredJul 26, 94May 27, 97[B23P]
5588345 Fin sheet control apparatus for pressExpiredNov 22, 93Dec 31, 96[B26D, B65H]
5379624 Slaved tube length control for hairpin benderExpiredNov 22, 93Jan 10, 95[B21D]
5353496 Mechanical tube expander with four axis controlExpiredAug 06, 93Oct 11, 94[B23P]
5233853 Stretch straightening hairpin benderExpiredJan 03, 92Aug 10, 93[B21D]
5220722 Quick height change adjustment for tube expanderExpiredDec 09, 91Jun 22, 93[B23P]
5003691 Mechanical tube expander with hairpin bend supportExpiredJul 06, 90Apr 02, 91[B23P]
4980966 Rod holder for the assembly of heat exchangersExpiredApr 27, 90Jan 01, 91[B23P]
4847989 Spiral expanding bulletExpiredJun 16, 83Jul 18, 89[B23P]
4747208 Device for assembling return bend to coilExpiredApr 14, 87May 31, 88[B23P]
4683649 Device for assembling return bend to coilExpiredJun 11, 84Aug 04, 87[B23P]

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