Invention Grant
US09379560B2 Method and device to monitor the current of a battery-operated handheld power tool
有权
监测电池供电手持式电动工具电流的方法和装置
- Patent Title: Method and device to monitor the current of a battery-operated handheld power tool
- Patent Title (中): 监测电池供电手持式电动工具电流的方法和装置
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Application No.: US14241752Application Date: 2012-06-20
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Publication No.: US09379560B2Publication Date: 2016-06-28
- Inventor: Michael Brandner , Thomas Mueller , Bernd Ziegler
- Applicant: Michael Brandner , Thomas Mueller , Bernd Ziegler
- Applicant Address: LI Schaan
- Assignee: Hilti Aktiengesellschaft
- Current Assignee: Hilti Aktiengesellschaft
- Current Assignee Address: LI Schaan
- Agency: Davidson, Davidson & Kappel, LLC
- Priority: DE102011081790 20110830
- International Application: PCT/EP2012/061766 WO 20120620
- International Announcement: WO2013/029825 WO 20130307
- Main IPC: H02J7/00
- IPC: H02J7/00 ; B25F5/00 ; H01M10/42 ; H01M10/48 ; G01R19/00 ; G01R31/36 ; H02H7/08

Abstract:
A method to monitor the current of a handheld power tool (3) operated by a battery (2), by at least one counter (5), includes the following steps: measuring (S1) the electric current (I) drawn from the battery during the operation of the electric tool; incrementing (S2) a reading (Z, Z1, Z2) of the counter (5) by a certain increment (IN) whenever the measured current (I) is higher than a specified upper limit value (G1, G2) during a given counting interval; decrementing (S3) the reading of the counter by a certain decrement (DE) whenever the measured current is lower than the specified upper limit value during the given counting interval; and switching off (S4) the electric tool when the reading (Z, Z1, Z2) of the counter is higher than a specified limit value (T1, T2) for the counter.
Public/Granted literature
- US20140232352A1 METHOD AND DEVICE TO MONITOR THE CURRENT OF A BATTERY-OPERATED HANDHELD POWER TOOL Public/Granted day:2014-08-21
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