| 摘要 |
A top-adjusting leveling foot for installation on the leg of an object has an adjustment knob, an adjustment knob base with a bottom cavity and a non-circular passage extending axially through the center of the adjustment knob base, a threaded bushing with a top annular flange held within the bottom cavity of the adjustment knob base, and a drive stud assembly including a foot and a drive bar that has a lower threaded portion for engaging a partially threaded interior passage of the threaded bushing, and an upper bar portion sized and configured for engagement with the non-circular passage through the adjustment knob base. Rotation of the adjustment knob in a first direction axially advances the drive bar and lowers the foot and rotation of the adjustment knob in the opposite direction axially retracts the drive bar and raises the foot.
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