Patent · US Expired

Exhaust gas muffler for a two-stroke engine

US4890690A · kind A · utility

40Cited by

7References

17Claims

0Family size

Assignee

Andreas Stihl · DE

Inventors

Hartmut Fischer · Hofheim, DE
Jurgen Grassmuck · Stuttgart, DE
Michael Wissmann · Markgröningen, DE
Albert Shane Dreher · Livermore, US

Key dates

Filing date	Sep 6, 1988
Grant date	Jan 2, 1990
Priority date	—
Expiry date	Sep 6, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/12
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

The invention is directed to an exhaust gas muffler for a two-cycle engine, especially for a handheld portable tool, such as a chain saw. In exhaust gas mufflers equipped with a catalyzer, the formation of flame from the fuel-containing exhaust gases exiting from the muffler must be prevented. These exhaust gases are intensely overheated because of the exothermal process in the catalyzer. The muffler according to the invention includes a catalyzer which establishes a connection between separate component chambers of the muffler housing. The muffler can be mounted directly on the motor outlet.

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