Invention Grant
- Patent Title: Portable power tool
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Application No.: US16070565Application Date: 2017-01-24
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Publication No.: US10688614B2Publication Date: 2020-06-23
- Inventor: Roland Schaer
- Applicant: Hilti Aktiengesellschaft
- Applicant Address: LI Schaan
- Assignee: HILTI AKTIENGESELLSCHAFT
- Current Assignee: HILTI AKTIENGESELLSCHAFT
- Current Assignee Address: LI Schaan
- Agency: Leydig Voit & Mayer, Ltd.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@4647c71c
- International Application: PCT/EP2017/051364 WO 20170124
- International Announcement: WO2017/129538 WO 20170803
- Main IPC: B23Q11/00
- IPC: B23Q11/00 ; B25D16/00 ; B25F5/00 ; B23Q11/04

Abstract:
A control method for a power tool for rotary tools comprises rotating a tool holder continuously about a working axis by a rotary drive. A rotary movement of a handle about the working axis is sensed by a motion sensor. A first angle of rotation of the handle is estimated by a first motion estimator, wherein rotary movements beneath a limit value are discounted. A second angle of rotation of the handle is estimated by a second motion estimator, wherein rotary movements beneath the limit value are taken into account. A measure for reducing the torque output of the rotary drive is activated when the first angle of rotation exceeds a first triggering threshold (A1), and when the second angle of rotation exceeds a second triggering threshold (A2) and at the same time a power output of the rotary drive exceeds a power threshold (L).
Public/Granted literature
- US20190061081A1 PORTABLE POWER TOOL Public/Granted day:2019-02-28
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