Patent · US Active

Power tool with sprocket cover

US9138912B2 · kind B2 · utility

5Cited by

38References

16Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Ulrich Kapinsky · Waiblingen, DE
Helmut Zimmermann · Winnenden, DE
Jochen Oerding · Ludwigsburg, DE

Key dates

Filing date	Oct 12, 2012
Grant date	Sep 22, 2015
Priority date	—
Expiry date	Sep 6, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23D59/006
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A power tool has guide bar guiding a saw chain. A drive motor with a sprocket drives the saw chain. A sprocket compartment of the power tool housing has a peripheral wall adjacent to a roof of the saw chain and an ejection opening for cut material. The guide bar has a longitudinal center axis intersecting the saw chain in first and second deflection areas at the sprocket and the nose of the guide bar. The sprocket compartment has an exit opening where the saw chain exits. The peripheral wall of the sprocket compartment and the roof of the saw chain are disposed at a spacing relative to each other that, when the saw chain is standing still, is less than approximately 18 mm at least across 50% of a stretch from the first deflection area to the exit opening and across an entire saw chain width.

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