Patent · US Expired

Chain saw having a braking arrangement

US4662072A · kind A · utility

8Cited by

2References

11Claims

0Family size

Assignee

Andreas Stihl · DE

Inventors

Dieter Wieland · Neckarrems, DE
Manfred Bortfeld · Unterschleißheim, DE
Walter Gernhard · Weingarten, DE

Key dates

Filing date	Oct 17, 1985
Grant date	May 5, 1987
Priority date	—
Expiry date	Oct 17, 2005

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D59/00
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A chain saw is disclosed having a drive motor which drives the sprocket wheel of the saw chain via a transmission stage. The sprocket wheel rotates in the same direction as the drive shaft of the drive motor and drives the saw chain in such a manner that the portion thereof traversing the lower periphery of the cutter bar moves toward the housing of the chain saw. The saw chain is braked with a braking arrangement which develops a braking moment that causes the chain saw to develop a reaction moment that opposes the kickback moment occurring as a consequence of the kickback action. In this way, the angle through which the chain saw is deflected during kickback is reduced. In addition, a compact configuration of the motor housing of the chain saw is obtained wherein the braking arrangement is kept free of dirt and chips.

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