Cheng Cycle Patents

 

SUMMARY

International Power Technology was founded in October 1974 on the basis of a core of technology which has grown and evolved continuously since then. IPT has developed technological know-how in optimized steam-injected gas turbine engines and their subsequent development into high-efficiency generation and cogeneration cycles. Below is a summary of the IPT developed patents that were a part of those technology advancement efforts.

 

ISSUED PATENTS - UNITED STATES
Ref Name Number Issued Expires
1 Parallel-Compound Dual-Fluid Heat Engine 3,978,661 09/07/76 09/07/93
2 Pressure Staged Heat Exchanger 4,072,182 02/07/78 02/07/95
3 Regenerative Parallel-Compound Dual-Fluid Heat Engine 4,128,994 12/12/78 12/12/95
4 Regenerative Parallel-Compound Dual-Fluid Heat Engine 4,248,039 02/03/81 12/12/95
5 Control System for Cheng Dual-Fluid Cycle Engine System 4,297,841 11/03/81 12/12/95
6 Removal of Sulfur Compounds from Combustion Product Exhaust 4,312,643 01/26/82 01/26/99
7 Steam Output Control System 4,393,649 07/19/83 07/19/00
8 Control System for Cheng Dual-Fluid Cycle Engine System 4,417,438 11/29/83 11/29/00
9 Control System for Cheng Dual-Fluid Cycle Engine System 4,499,721 02/19/85 12/12/95
10 Control System for Cheng Dual-Fluid Cycle Engine System 4,549,397 10/29/85 02/03/98
11 Method and Apparatus for Improved Shutdown Procedures in Dual-Fluid Cheng Cycle Engines 4,597,256 07/01/86 07/01/03
12 Control System for Cheng Dual-Fluid Cycle Engine System 4,680,927 07/21/87 07/21/04
13 Apparatus for Removing Noncondensable Gases from Cogenerated Process Steam in Dual Fluid Cheng Cycle Engines 4,685,288 08/11/87 08/11/04
14 Method and Apparatus for Improved Startup Procedures in Conventional Steam Power Generators and Dual Fluid Cheng Cycle Engines 4,735,043 04/05/88 04/05/05
15 Method and Apparatus for Improved Startup Procedures in Conventional Steam Power Generators and Dual Fluid Cheng Cycle Engines 4,790,269 12/13/88 12/13/05
16 Steam-Injected Free-Turbine-Type Gas Turbine 4,823,546 04/25/89 04/25/06
17 Steam-Injected Free-Turbine-Type Gas Turbine 4,899,537 02/13/90 02/13/07
18 Method and Apparatus for Bypassing the
Superheater in a Dual-Fluid Engine
6,085,513

 

07/11/00 07/11/17
19 Method and apparatus to homogenize fuel and diluent for reducing emissions in combustion systems 6,418,724 07/16/02

Issued Patents - Canada
US
Ref
Name Number Issued Expires
2 Pressure Staged Heat Exchanger 1 066 693 11/20/79 11/20/96
3 Regenerative Parallel-Compound Dual-Fluid Heat Engine 1 083 835 08/19/80 08/19/97
5 Control System for Cheng Dual-Fluid Cycle Engine System 1 159 658 01/03/84 01/03/01
9 Control System for Cheng Dual-Fluid Cycle Engine System 1 177 263 11/06/84 11/06/01
16 Steam-injected Free-Turbine-Type Gas Turbine 1 243 493 10/25/88 10/25/05
11 Method and Apparatus for Improved Shutdown Procedures in Dual-Fluid Cheng Cycle Engines 1 250 438 02/28/89 02/28/06
13 Method and Apparatus for Removing
Noncondensable Gases from Cogenerated Process Steam in Dual Fluid Cheng Cycle Engines
1 252 353 04/11/89 04/11/06
15 Method and Apparatus for Improved Startup Procedures in Conventional Steam Power Generators and Dual Fluid Cheng Cycle Engines 1 279 766 02/05/91 02/05/08

Issued Patents - Europe
US
Ref
Name Country Number Issued Expires
3 Regenerative ParaIlel-Compound Dual-Fluid Heat Engine Germany 2,640,098 09/06/76 09/06/96
3 Regenerative Parallel-Compound Dual-Fluid Heat Engine Great Britain 1,561,294 04/23/80 09/06/96
3 Regenerative Parallel-Compound Dual-Fluid Heat Engine France 7626792 09/06/76 09/06/96
3 Regenerative Parallel-Compound Dual-Fluid Heat Engine Belgium 845,824 09/03/76 09/03/96
5 Control System for Cheng Dual-Fluid Cycle Engine System Italy 1,212,432 08/13/80 08/13/00
7 Steam Output Control System Italy 1,138,885 09/17/86 07/28/01
16 Steam-Injected Free-Turbine-Type Gas Turbine Germany, France, Great Britain 0172224 06/06/90 01/30/05
5 Control System for Cheng Dual-Fluid Cycle Engine System Great Britain, France, Sweden, Switzerland,
Netherlands
0034614 05/04/88 07/07/00
14 Method and Apparatus for Improved Startup Great Procedures in Conventional Steam Power Generators and Dual Fluid Cheng Cycle Engines Britain, Italy, Netherlands, Sweden, Germany 0228463 10/24/90 07/07/06
7 Steam Output Control System France, Great Britain,
Switzerland,
Germany
0056813 06/29/88 08/04/01
11 Method and Apparatus for Improved Shutdown Procedures in Dual-Fluid Cheng Cycle Engines Great Britain, Italy, Netherlands, Sweden, Germany,
France, Switzerland
0216904 01/16/91 03/31/06
13 Method and Apparatus for Removing Noncondensable Gases from Cogenerated Process Steam in Dual Fluid Cheng Cycle Engines France, Great Britain,Italy, Netherlands, Sweden, Switzerland, Germany 0215111 08/28/91 03/20/96

Issued Patents - Australia
US
Ref
Name
Number Issued Expires
11 Method and Apparatus for Improved Shutdown Procedures in Dual-Fluid Cheng Cycle Engines 573444 11/07/88 03/31/02
14 Method and Apparatus for Improved Startup Procedures in Conventional Steam Power Generators and Dual Fluid Cheng Cycle Engines
578843 07/07/86 07/07/02
13 Method and Apparatus for Removing Noncondensable Gases from Cogenerated Process Steam in Dual Fluid Cheng Cycle Engines
592793 06/15/90 03/20/02


Issued Patents - Japan
US
Ref
Name
Number Issued Expires
3 Regenerative Parallel-Compound Dual-Fluid Heat Engine 999727 05/03/80 10/30/94
14 Method and Apparatus for Improved Startup Procedures in Conventional Steam Power Generators and Dual Fluid Cheng Cycle Engines 1686910 08/11/92 07/07/06
11 Method and Apparatus for Improved Shutdown Procedures in Dual-Fluid Cheng Cycle Engines 1 732335 01/17/93 03/31/06
16 Steam-Injected Free-Turbine-Type Gas Turbine 1 873876 09/26194 01/30/05
11 Method and Apparatus for Improved Shutdown Procedures in Dual-Fluid Cheng Cycle Engines 2015912 03/20/96 03/20/06


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