Patent · US Expired

Multipart cooled piston for an internal combustion engine

US6729291B1 · kind B1 · utility

20Cited by

8References

1Claims

0Family size

Assignee

Mahle GmbH · DE

Inventors

Rainer Scharp · Leinfelden, DE
Dieter Messmer · Waiblingen, DE

Key dates

Filing date	Mar 6, 2003
Grant date	May 4, 2004
Priority date	—
Expiry date	Mar 6, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02F3/0023
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A multipart cooled piston for an internal combustion engine comprises an upper part and a lower part of the piston. The two parts are screwed together via a threaded bolt that is arranged on the upper part of the piston, and a threaded bore that is drilled into the lower part of the piston. The threaded bore is arranged in an area of the lower part of the piston that is thin-walled to such a degree that it is deformed like a plate spring as the two parts of the piston are screwed together, so that no other safety means such as a lock nut are required for securing the assembled piston.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.