Patent · US Expired

Blower having a blower tube incorporating a reduction device for reducing the clear flow cross section of said blower tube at idle operation

US7077632B2 · kind B2 · utility

1Cited by

21References

14Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Gerhard Osburg · Weingarten, DE
Wolfgang Luithardt · Waiblingen, DE
Peter Schmidt · Waiblingen, DE

Key dates

Filing date	Nov 10, 2003
Grant date	Jul 18, 2006
Priority date	—
Expiry date	Nov 10, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04D27/003
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A blower (1) has a housing (10) to which a blower pipe (2) may be removably connected. An internal combustion engine located within the housing (10) drives a blower wheel. The blower wheel, in turn, generates an air flow (11) within the blower pipe. To reduce the exhaust gases and the fuel consumption during idle operation of the combustion engine, a reduction device (12, 22), located in the blower pipe downstream of the blower wheel reduces the clear cross section of flow during idle operation of the engine.

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