Patent ID: 7311550

Claim:
A jack assembly comprising: a first plurality of jacks and a second plurality of jacks that is positioned below the first plurality of jacks, the first plurality of jacks defining a first set of air gaps between the jacks of the first plurality jacks, the second plurality of jacks defining a second set of air gaps between the jacks of the second plurality of jacks, the jacks of the second plurality of jacks being centered directly below the first set of air gaps defined between the jacks of the first plurality of jacks and the jacks of the first plurality of jacks being centered directly above the second set of air gaps defined between the jacks of the second plurality of jacks, wherein front faces of the first plurality of jacks define a first straight line positioned at a first depth and front faces of the second plurality of jacks define a second straight line that is positioned at a second depth that is different than the first depth in a front to back direction; wherein at least two adjacent jacks of the plurality of jacks being vertically offset to each other, horizontally offset to each other, and staggered at different depths from front to back with respect to each other.