Patent · US Active

Piston for an internal combustion engine

US8434400B2 · kind B2 · utility

2Cited by

6References

6Claims

0Family size

Assignee

Mahle International GmbH · DE

Inventors

Peter Kemnitz · Leutenbach, DE
Carmen Klusch · Ludwigsburg, DE
Rainer Scharp · Leinfelden, DE

Key dates

Filing date	Jul 15, 2009
Grant date	May 7, 2013
Priority date	—
Expiry date	Jul 17, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02F3/003
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piston for an internal combustion engine has a lower piston part and an upper piston part that are connected with one another by friction welding and form an outer circumferential cooling channel. The upper piston part has a circumferential ring belt provided with ring grooves, the inner wall of which delimits the circumferential outer cooling channel. An outer circumferential friction-weld seam is provided below the ring belt, the width of which seam is less than or equal to the wall thickness between the groove root of the ring grooves and the inner wall of the ring belt.

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