Patent · US Expired

Piston having a barrel of forged steel and a cooling channel

US6026777A · kind A · utility

39Cited by

8References

1Claims

0Family size

Assignee

Mahle GmbH · DE

Inventors

Peter Kemnitz · Leutenbach, DE
Michael Ullrich · Heubach, DE

Key dates

Filing date	Jan 21, 1999
Grant date	Feb 22, 2000
Priority date	—
Expiry date	Jan 21, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piston with a cooling channel having a basic piston barrel made from forged steel and a box-shaped shaft, bosses and boss supports and connecting walls between the boss supports as well as a combustion trough. The piston increases the rigidity of the ring part. To accomplish this, the piston has a wall extending all around above the boss bores. A structural component is welded in between the wall and the piston head and limits the cooling channel. This design increases the rigidity of the ring part in pistons.

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