Coated crossfire tube assembly
US6912838B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2003 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Aug 5, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2230/313
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A crossfire tube assembly is provided having an increased resistance to wear and oxidation. This increased resistance is provided by the application of coatings to the mating surfaces between the crossfire tube and crossfire tube clip. In the preferred embodiment, a physical vapor deposition (PVD) Titanium Aluminum Nitride coating is applied to the outer walls of the crossfire tubes which is used in combination with an air plasma spray (APS) Aluminum Bronze coating applied to the crossfire tube clip open end that mates with the crossfire tubes. The coating combination serves to protect the components from frictional wear and extend their life. In an alternate embodiment, the crossfire tubes also contain a plurality of air purge holes that provide a layer of cooling air along the crossfire tube inner wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.