PRATT & WHITNEY CANADA INC.

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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 1154
 
  
 
F02C GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS 752
 
  
 
B63H MARINE PROPULSION OR STEERING 238
 
  
 
F04D NON-POSITIVE-DISPLACEMENT PUMPS272
 
  
 
F16J PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS248
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING271
 
  
 
B64C AEROPLANES; HELICOPTERS 173
 
  
 
E01D BRIDGES 114
 
  
 
F01B MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES 126
 
  
 
F03B MACHINES OR ENGINES FOR LIQUIDS 123

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6079199 Double pass air impingement and air film cooling for gas turbine combustor wallsJun 03, 98Jun 27, 00[F02C, F23R]
6067791 Turbine engine with a thermal valveDec 11, 97May 30, 00[F02C]
6059523 Containment system for containing blade burstApr 20, 98May 09, 00[F01B]
6035627 Turbine engine with cooled P3 air to impeller rear cavityApr 21, 98Mar 14, 00[F02C]
6035890 Retainer insert for a valve having a floating closure memberJun 02, 98Mar 14, 00[F16K]
6003808 Maintenance and warranty control system for aircraftJul 11, 97Dec 21, 99[B64C]
5993160 Cover plate for gas turbine rotorDec 11, 97Nov 30, 99[F01D]
5984636 Cooling arrangement for turbine rotorDec 18, 97Nov 16, 99[B63H, F03D, F01D]
5984639 Blade retention apparatus for gas turbine rotorJul 09, 98Nov 16, 99[B63H, F16B, F01D]
5971703 Seal assembly for a gas turbine engineDec 05, 97Oct 26, 99[F01D]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5112193 Fan blade axial retention deviceExpiredSep 11, 90May 12, 92[F01D]
5052889 Offset ribs for heat transfer surfaceExpiredMay 17, 90Oct 01, 91[F01D]
4989919 Method and apparatus for manufacturing compliant brush sealsExpiredAug 14, 89Feb 05, 91[B25B]
4856377 Planetary gear system for a gas turbine engineExpiredJan 07, 87Aug 15, 89[F16H]
4818948 Capacitive bridge-type probe for measuring blade tip clearanceExpiredAug 05, 86Apr 04, 89[G01R, H01G]
4768924 Ceramic stator vane assemblyExpiredJul 22, 86Sep 06, 88[F01D]
4758028 Firewall sealExpiredJul 30, 87Jul 19, 88[F16L, F16J]
4720235 Turbine engine with induced pre-swirl at the compressor inletExpiredJun 03, 86Jan 19, 88[F01D]
4708371 Coupling for a fuel manifoldExpiredApr 09, 86Nov 24, 87[F16L]
4687412 Impeller shroudExpiredJul 03, 85Aug 18, 87[F04D]
4682505 Compact torque measurement systemExpiredDec 13, 85Jul 28, 87[G01L]
4640091 Apparatus for improving acceleration in a multi-shaft gas turbine engineExpiredJan 08, 86Feb 03, 87[F02C]
4596501 Multiple cutter pass flank millingExpiredFeb 24, 84Jun 24, 86[B23C]
4592765 Inertial separatorExpiredJan 15, 85Jun 03, 86[B01D]
4590759 Method and apparatus for improving acceleration in a multi-shaft gas turbine engineExpiredJan 27, 84May 27, 86[F02C]
4557141 Method for diagnosing faults in electronic fuel control systemsExpiredSep 19, 84Dec 10, 85[G01M]
4522026 Power/torque limiter unit for free turbine type enginesExpiredFeb 07, 83Jun 11, 85[F02C]
4509962 Inertial particle separatorExpiredOct 06, 83Apr 09, 85[B01D]
4457568 Bearing support structureExpiredJan 21, 83Jul 03, 84[F16C]

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