Method and system for coating sections of internal surfaces
US7608151B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2005 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Aug 3, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L58/18
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method and system for coating the internal surfaces of a localized area or section of a workpiece is presented. Conductive structures are inserted into one or more openings of a workpiece to define the section to be coated. In some embodiments, a bias voltage is connected to a workpiece section, which functions as a cathode. A gas source and vacuum source are coupled to each conductive structure through a flow control system. The flow control system enables a first opening to function as a gas inlet and a second opening to function as a vacuum exhaust. Only the section encompassed by the conductive structures is coated. When the coating process is completed, a means for varying the conductive structures along the length is utilized to move onto the next section to be coated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.