| 摘要 |
A tripod shaped vehicle bumper jack for raising and lowering a vehicle. The jack legs are foldable for ease of storage. Attached to the end of each leg is a rotatable base plate so that the jack is self-leveling when it becomes necessary to lift a vehicle when the ground surface is at an angle to the horizontal. The vehicle is raised and lowered using a bumper hook attached to a cable driven by a worm gear driven windlass.
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