4. Tool driving or impacting
  5. Means to drive tool about an axis
  6. Gear drive

An-Fu Hsieh

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Multi-usage electric tool with angle-changeable grip

Tool driving or impacting – Means to drive tool about an axis – Gear drive
Patent

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Tool head structure of power screwdriver

Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Patent

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Profile ID: LFUS-PAI-P-939313

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