Patent · US Expired

Piston for a two-cycle engine

US7331276B2 · kind B2 · utility

3Cited by

4References

17Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Helmut Schleβmann · Bocholt, DE
Tobias Wurster · Göppingen, DE
Andreas Bähner · Waiblingen, DE
Ralf-Rainer Kemmler · Bornsteiner Straße, DE

Key dates

Filing date	Jan 20, 2006
Grant date	Feb 19, 2008
Priority date	—
Expiry date	Mar 18, 2026

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02F3/0076
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A piston for a two-cycle engine having a piston head and a piston wall in which are disposed wrist pin eyes. At least one undercut is formed between the underside of the piston head and the wrist pin eyes at a distance from the piston head. The undercut extends from the interior of the piston toward the piston wall. A respective thickened portion is provided in at least one region of the piston that is rotationally shifted about the longitudinal axis of the piston by 90° relative to one of the wrist pin eyes. The thickened portion is disposed at a distance below the piston head and extends into the interior of the piston.

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