Method for detecting a bit jam condition using a freely rotatable inertial mass
US7395871B2 · kind B2 · utility
36Cited by
24References
20Claims
0Family size
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Key dates
| Filing date | Apr 22, 2004 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Mar 12, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved method is provided for controlling a power tool having a rotary shaft. The method includes: disposing an inertial mass in a housing of the power tool, such that the inertial mass is freely rotatable about an axis of rotation which is axially aligned with the rotary shaft; monitoring rotational motion of the power tool in relation to the inertial mass during operation of the power tool; and activating a protective operation based on the rotational motion of the power tool in relation to the inertial mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.