Internal combustion engine piston and a method of producing the same
US4709621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1985 |
| Grant date | Dec 1, 1987 |
| Priority date | — |
| Expiry date | Mar 5, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49252
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is an internal combustion engine piston having a metal piston body and a piston cap constituted by a plurality of ceramic pieces and fixed to the top portion of the metal piston body, wherein the piston cap is composed of at least one kind of a ceramic material, at least one of the ceramic pieces is fixed to the metal piston body through fitting or through engagement by way of a metallic piece secured onto said at least one ceramic piece, and the remaining ceramic piece or pieces are fixed onto the metal piston body by means of said at least one ceramic piece. A method for producing an internal combustion engine piston is also disclosed, which method includes steps: forming the piston cap from at least one kind of a ceramic material, forming a fitting projection on at least one of the ceramic pieces constituting the piston cap, fixing said at least one of the ceramic pieces onto the metal piston body through fitting the fitting projection to a through hole or depression formed at the top portion of the metal piston body, and fixing the remaining ceramic piece or pieces onto the metal piston body by means of said at least one of ceramic pieces fixed to the metal pis…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.