| 摘要 |
Conical jack stands that are used to hold up a motor vehicle (or other object) after it has been raised (e.g., by jacks). Rather than having legs like conventional jack stands, they have the shape of a hollow cone, with a circular bottom edge. The circular bottom edge gives them a larger bottom surface area than the bottom ends of the legs of conventional jack stands, so that they will be less likely to sink into the ground or asphalt. There is a hole with internal screw threads in the top of each cone, into which a large bolt-like contacting member is screwed. The contacting members can be rotated to adjust the height of the jack stands. Their hollow conical shape makes it easy to stack the jack stands for storage. Four jack stands are stored in a square box, with one contacting member in each corner of the box. |
