Patent · US Expired

Arrangement for controlling the intake air for the carburetor of a hand-held portable tool

US4691681A · kind A · utility

8Cited by

7References

27Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Klaus Hoppner · Erbach, DE
Bernhard Kiefel · Schorndorf, DE

Key dates

Filing date	Jun 26, 1986
Grant date	Sep 8, 1987
Priority date	—
Expiry date	Jun 26, 2006

Classification

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

Abstract

The invention is directed to an arrangement for controlling the intake air for the carburetor of a hand-held portable tool such as a motor-driven chain saw or the like. During winter operation, the cooling air that is heated by the engine cylinder is carried through a pass-through opening to the carburetor. During summer operation the pass-through opening is blocked by a slide that is pivotally mounted on a pivot axis. The slide selectively opens or closes the pass-through opening and is configured as a deflector which, in its open position baffles the heated cooling air from the engine cylinder and guides it toward the carburetor.

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