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1. (WO2018099743) SHARPENING DEVICE

Pub. No.:    WO/2018/099743    International Application No.:    PCT/EP2017/079706
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Tue Nov 21 00:59:59 CET 2017
IPC: B23D 63/16
B24D 15/06
Applicants: ROBERT BOSCH GMBH
Inventors: HEYWOOD, Peter
BEHR, Tilmann
Title: SHARPENING DEVICE
Abstract:
The invention relates to a sharpening device for portable machine tools, in particular for chain saws, having at least one grinding unit (14a; 14b), which, for sharpening at least one cutting element (16a) of a cutting strand (18a), in particular a saw chain, of the portable machine tool, has at least one movably mounted grinding element (20a; 20b), having at least one actuating unit (22a; 22b) for moving the at least one grinding element (20a; 20b) relative to the cutting strand (18a), and having at least one limiting unit (24a; 24b) at least for limiting a sharpening force that can be exerted on the at least one cutting element (16a) by means of the at least one grinding element (20a; 20b) during a sharpening operation. According to the invention, the at least one limiting unit (24a; 24b), in particular in addition to limiting the sharpening force, be provided to limit a duration of an action of the sharpening force that can be exerted on the at least one cutting element (16) by means of the at least one grinding element (20a; 20b).