| 摘要 |
There is provided a jack apparatus having a base plate with a top surface, a bottom surface and a peripheral edge, the top surface having an opening, a bar extending from the top surface of the base plate, and a travelling member mounted to the bar. The travelling member has an actuator that moves the travelling member along the bar relative to the base plate and a lifting bracket mounted at an end of the travelling member, the lifting bracket having a top surface and a bottom surface, and the lifting bracket being sized to fit within the opening when the travelling member is adjacent to the base plate such that the lifting bracket engages the base plate. |
| 主权项 |
1. A jack apparatus, comprising:
a base plate having a top surface, a bottom surface, and a peripheral edge, the top surface comprising an opening; a bar extending from the top surface of the base plate; and a travelling member mounted to the bar, the travelling member comprising:
an actuator that moves the travelling member along the bar relative to the base plate; anda lifting bracket mounted at an end of the travelling member, the lifting bracket having a top surface and a bottom surface, the lifting bracket being sized to fit within the opening when the travelling member is adjacent to the base plate such that the lifting bracket engages the base plate. |
