{
  "abstract": "An impact power tool includes one or more of the following features including a housing, a motor, an output spindle, a rotary impact assembly, and a planetary transmission having a fixed ring gear and rotatable planet gear carrier. In an aspect, the planetary transmission is configured to transmit rotational motion from a motor output shaft to a cam shaft at a single overall speed reduction ratio. The planetary transmission includes a sun gear rotatably driven by the motor output shaft, a planet carrier rotatably driving the cam shaft, a ring gear rotationally fixed relative to the tool housing, a first planet gear mounted to the planet carrier and meshed with the sun gear but not meshed with the ring gear and a second planet gear mounted to the carrier and meshed with the ring gear but not meshed with the sun gear.",
  "assignees": [
    "BLACK & DECKER INC"
  ],
  "authors": [
    "PETRUS TYLER",
    "TOMAYKO DAVID"
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    "name": "Creative Commons Attribution 4.0 International",
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  "published_at": "2026-09-15T19:08:48.879552Z",
  "publisher": "Nebula Innovations Limited",
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  "source_date": "2026-03-17",
  "source_id": "US-12576501-B2",
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  "supersedes": null,
  "title": "Impact power tool",
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