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Hand held power tool with safety coupling

  • US 5,201,373 A
  • Filed: 12/12/1991
  • Issued: 04/13/1993
  • Est. Priority Date: 01/05/1991
  • Status: Expired due to Fees
First Claim
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1. A hand held power tool, particularly a hammer drill, comprising a housing;

  • a drive shaft;

    a rotatable tool holder;

    a safety coupling provided between said drive shaft and said tool holder; and

    a switching member supported with a bearing axis extending substantially parallel to said driven shaft and freely movable about said bearing axis in a plane extending substantially perpendicularly to said drive shaft, said switching member being formed so that in response to a jerky rotation of said housing about an axis of said tool holder said switching member engages said safety coupling and releases said safety coupling from said drive shaft.

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