Two-part piston for an internal combustion engine
US7302927B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2006 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Jun 22, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F3/0023
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Proposed is a two-part piston 1 for an internal combustion engine, having an upper part 2 that has a pin 31 having an outside thread 32 on the underside of its piston crown 4, and having a lower part 3, which is connected with the upper part 2 by means of a nut 29 screwed onto the pin 31. The lower part 3 has an elastically resilient upper base part 25, onto which an expansion sleeve 26, elastic in the axial direction, is formed, which has an opening 27 having a collar 28, which is directed radially inward, into which the pin 31 is introduced. An elastic compression sleeve 30 is formed onto the nut 29, which sleeve rests against the collar 28. In this connection, the elastic resilience of the base part 25, the expansion sleeve 26, the compression sleeve 30, the pin 31, and the piston crown 4 has the result that the screw connection has a flat characteristic line despite a low compression height of the piston 1, thereby imparting great strength to the screw connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.