Apparatus and method for thermal spray coating interior surfaces
US5468295A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1993 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B13/0636
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of thermal spray coating a surface with a metal coating material includes the provision of a nozzle about a thermal spray coating apparatus, such as a two wire electric-arc apparatus. The nozzle includes a plurality of ports facing generally radially inwardly towards a coating material particle stream, such as an atomized molten metal stream of a two-wire arc thermal spray apparatus. The ports sequentially receive a deflecting gas flow, such that the direction moves circumferentially about the axis of the particle stream. The deflecting gas entrains the coating material and carries it radially to the surface of the part to be coated or the nozzle assembly. By utilizing a plurality of valve ports, one simplifies the assembly over prior art systems which have rotated the part to be coated. In one embodiment of this invention, a valve disk selectively communicates a compressed gas to the ports sequentially. In a second embodiment, each of the ports are associated with individual electrically operated valves which are sequentially opened to achieve the changing direction of the deflecting gas flow. A method and apparatus for simultaneously coating a plurality of bores main bod…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.