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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-12545561-B2, on 10 February 2026. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003073

Hand-held jack

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Lift Tables and Positioners
Inventors
CHEN CHUNG LI
Assignee
CHEN CHUNG LI
Original source
US-12545561-B2, the United States Patent and Trademark Office, 10 February 2026
Document SHA-256
b88bfc4b1bb2a0f7ee5a108b114e4c08724a5c88b0edd748aa8e5bc1d3fa3cbe

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.

Publication information

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Citation

OpenTechnical Publication OT-2026-000003073, “Hand-held jack,” published September 15, 2026 at 19:17:09 UTC, https://opentechnical.org/p/OT-2026-000003073.

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Terms

This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.