| 发明名称 | Method and device to monitor the current of a battery-operated handheld power tool | ||
| 摘要 | 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; andswitching 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. | ||
| 申请公布号 | US9379560(B2) | 申请公布日期 | 2016.06.28 |
| 申请号 | US201214241752 | 申请日期 | 2012.06.20 |
| 申请人 | Hilti Aktiengesellschaft | 发明人 | Brandner Michael;Mueller Thomas;Ziegler Bernd |
| 分类号 | H02J7/00;B25F5/00;H01M10/42;H01M10/48;G01R19/00;G01R31/36;H02H7/08 | 主分类号 | H02J7/00 |
| 代理机构 | Davidson, Davidson & Kappel, LLC | 代理人 | Davidson, Davidson & Kappel, LLC |
| 主权项 | 1. A method to monitor the current of a handheld power tool operated by a battery, via at least one counter, comprising the following steps: a) measuring the electric current drawn from the battery during operation of the electric tool; b) incrementing a reading of the counter by a certain increment whenever the measured current is higher than a specified upper limit value during a given counting interval; c) decrementing the reading of the counter by a certain decrement whenever the measured current is lower than the specified upper limit value during the given counting interval; and d) switching off the electric tool when the reading of the counter is higher than a specified limit value for the counter. | ||
| 地址 | Schaan LI | ||