Titanium nitride coated valve and method for making
US5441235A · kind A · utility
15Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | May 20, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L3/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is provided that in one embodiment is operative to form a wear resistant coating of titanium nitride on the outer surface of a metal valve such as an internal combustion engine poppet valve (100). In another embodiment, the method is operative to provide a valve made from titanium with an in situ zone of titanium nitride extending inwardly from the valve's outer surface. In yet another embodiment, the method is operative to provide a valve made from titanium with both a coating of titanium on the valve's outer surface and an in situ zone of titanium nitride extending inwardly from the valve's outer surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.