Gerard A Sileo

US Patent:

55360220, Jul 16, 1996

Filed:

Oct 29, 1993

Appl. No.:

8/145896

Inventors:

Gerard A. Sileo - Jupiter FL
John W. Appleby - Palm Beach Gardens FL
Stephen T. Narsavage - Jupiter FL
Francis X. Alent - Port St. Lucie FL
Charles G. Davis - Jupiter FL

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

F16J 15453

US Classification:

277235A

Abstract:

A gas turbine abradable seal is prepared by plasma spraying an oxidation resistant metallic material and boron nitride. The resultant structure comprises a metallic matrix encompassing a lubricating amount of boron nitride, with porosity of less than about 15 percent and a fabricated surface roughness of less than about 600 microinches. The reduced surface roughness and substantially reduced permeability of this seal provide substantially enhanced engine efficiency, and improved durability.

US Patent:

57801169, Jul 14, 1998

Filed:

May 27, 1997

Appl. No.:

8/863414

Inventors:

Gerard A. Sileo - Jupiter FL
John W. Appleby - Palm Beach Gardens FL
Stephen T. Narsavage - Jupiter FL
Francis X. Alent - Port St. Lucie FL
Charles G. Davis - Jupiter FL

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

C23C 406
C23C 410

US Classification:

427456

Abstract:

A gas turbine abradable seal is prepared by plasma spraying an oxidation resistant metallic material and boron nitride. The resultant structure comprises a metallic matrix encompassing a lubricating amount of boron nitride, with porosity of less than about 15 percent and a fabricated surface roughness of less than about 600 microinches. The reduced surface roughness and substantially reduced permeability of this seal provide substantially enhanced engine efficiency, and improved durability.

US Patent:

59323566, Aug 3, 1999

Filed:

Mar 21, 1996

Appl. No.:

8/620058

Inventors:

Gerard A. Sileo - Jupiter FL
William J. Woodard - Palm Beach Gardens FL
Frederick C. Walden - Jensen Beach FL
Harold W. Pettit - West Palm Beach FL
Timothy A. Twigg - Port St. Lucie FL

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

B32B 1504

US Classification:

428457

Abstract:

A composite ceramic coating having abrasive properties for application to a metallic substrate is provided which includes a ceramic matrix and a plurality of ceramic abrasive particles disposed within said ceramic matrix. The abrasive particles have a shear strength substantially greater than that of the ceramic matrix and possess an angular geometry. A method for providing an abrasive coating on a metallic article is also provided.

US Patent:

51677210, Dec 1, 1992

Filed:

Dec 5, 1991

Appl. No.:

7/784625

Inventors:

Charles C. McComas - Palm City FL
John W. Appleby - Palm Beach Gardens FL
Gerard A. Sileo - Royal Palm Beach FL
Herbert R. Barringer - Midwest City OK
Michael J. Patry - Oklahoma City OK

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

B08B 302

US Classification:

134 32

Abstract:

Gas turbine engine coatings must often be removed during engine maintenance and repair. The techniques utilized to accomplish this task, machining, chemical stripping, machining followed by chemical stripping, or grit blasting, frequently result in component damage or destruction. Liquid jet erosion can be utilized to remove seals, coatings, or portions thereof without damaging the engine hardware.

US Patent:

58979204, Apr 27, 1999

Filed:

Oct 17, 1997

Appl. No.:

8/953043

Inventors:

Gerard A. Sileo - Jupiter FL
William J. Woodard - Palm Beach Gardens FL
Frederick C. Walden - Jensen Beach FL
Harold W. Pettit - West Palm Beach FL
Timothy A. Twigg - Port St. Lucie FL

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

C23C 410

US Classification:

427450

Abstract:

A composite ceramic coating having abrasive properties for application to a metallic substrate is provided which includes a ceramic matrix and a plurality of ceramic abrasive particles disposed within said ceramic matrix. The abrasive particles have a shear strength substantially greater than that of the ceramic matrix and possess an angular geometry. A method for providing an abrasive coating on a metallic article is also provided.