DEMAG DELAVAL TURBOMACHINERY CORP.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 362

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6318728 Brush-seal designs for elastic fluid turbinesNov 24, 98Nov 20, 01[F01D]
5775873 Spillstrip design for elastic fluid turbines and a method of strategically installing the same thereinAug 13, 96Jul 07, 98[F01D]
5547340 Spillstrip design for elastic fluid turbinesMar 23, 94Aug 20, 96[F01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5628617 Expanding bell sealExpiredAug 12, 96May 13, 97[F01D]
5487549 Turbine interfitting packing with cam adjustmentExpiredOct 24, 94Jan 30, 96[F16J]
5464226 Retractable packing rings for steam turbinesExpiredDec 06, 93Nov 07, 95[F16J]
5433453 Articulated snout rings having spaced teethExpiredMar 02, 94Jul 18, 95[F16J]
5362072 Turbine radial adjustable labyrinth sealExpiredDec 21, 92Nov 08, 94[F16J]
5353516 Turbine packing ring measuring deviceExpiredFeb 05, 93Oct 11, 94[G01B]
4797065 Turbine blade retainerExpiredApr 18, 88Jan 10, 89[F01D]
4778342 Turbine blade retainerExpiredOct 17, 86Oct 18, 88[F01D]
4722149 Anti-shuttle pumpExpiredFeb 25, 86Feb 02, 88[F04D]
4437213 Means for tenon-forming a shroud to a turbine rotorExpiredAug 19, 82Mar 20, 84[B23P]
4362919 Method of welding using a covered tungsten electrodeExpiredFeb 18, 81Dec 07, 82[B23K]
4311350 Lubrication system for a thrust bearingExpiredSep 04, 80Jan 19, 82[F16C]
4305592 Gas seal bushingExpiredOct 23, 79Dec 15, 81[F16J]
4217814 Dual action trip and control valveExpiredApr 07, 78Aug 19, 80[F15B]

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