Method of forming a piston containing a cavity
US4972898A · kind A · utility
9Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1989 |
| Grant date | Nov 27, 1990 |
| Priority date | — |
| Expiry date | Jun 2, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2201/0448
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A porous body is formed around an element which has the shape of the desired cavity and the body is heated to a temperature such that the element melts and infiltrates the porous body at least in the immediate vicinity of the resulting cavity. The article may then, for example, be incorporated into a piston for an internal combustion engine so as to form a cavity in the crown region thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.