Cutting knife for a cutting head of a trimmer

US10194584B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• David Gunther · Weingarten, DE
• Fabian Pöhler · Fellbach, DE

Key dates

• Filing date: Jan 18, 2017
• Grant date: Feb 5, 2019
• Expiry date: Jan 29, 2037

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01D34/826
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The cutting knife has a base member with first and second faces. One face has a topographic disturbance element arranged between knife edge and longitudinal center axis and shaping the elevation profile of the face. On the opposite face relative to the center plane an opposite elevation profile with contour line is formed. The contour line points of the contour line of the first elevation profile are positioned opposite the contour line points of the opposite contour line on perpendiculars to the center plane. The contour line of the first elevation profile and the opposite contour line are noncongruent. The contour line of the first elevation profile extends transversely to the longitudinal center axis of the base member across the disturbance element and has an ascending line section and a descending line section. A turning point positioned between these line sections is a component of the disturbance element.