{
  "abstract": "A hand-held jack has a main body, including a frame on a grip, the frame having a shaft hole passing through a first chamber and a second chamber therein, a jacking member being fixed to a front end of the frame; and a slow-down device. The slow-down device includes a swing seat pushed by the first spring and mounted in the second chamber; at least one shaft clamp and at least one restricting plate urged by a third spring that are disposed in a first accommodating groove and a second accommodating groove of the swing seat for clamping a lift shaft; and an eccentric push member having an eccentric portion resting on the restricting plate and a push portion. When a workpiece is lifted by the hand-held jack, the slow-down device lowers the workpiece slowly.",
  "assignees": [
    "CHEN CHUNG LI"
  ],
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    "CHEN CHUNG LI"
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  "published_at": "2026-09-15T19:17:09.640632Z",
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  "source_date": "2026-02-10",
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  "title": "Hand-held jack",
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