Method of making a compound valve seat
US4472350A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1983 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Jun 9, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12028
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A valve seat or similar article produced by sintering a compound body is improved in economy and producibility by employing a method wherein the amount of a second powder for forming the compound body is controlled so as to be minimized. A first powder is initially charged into a compression space and lightly compressed to form a preparatory compact of a desired shape. Subsequently, the second powder is charged in over the preparatory compact to a degree controlled by the displacement of the compact, and the preparatory compact and the second powder are forcefully compressively integrally molded to form a final compact which is then sintered to form the finished product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.