Patent ID: 8226074

Claim:
A corner clamping apparatus comprising: a set of rigid L supports, the set of rigid L supports comprising first, second, and third rigid L supports in a plane and first, second, third, and fourth clamping feet; wherein, the first rigid L support comprises first and second legs, the second rigid L support comprises first and second legs, and the third rigid L support comprises first and second legs, the first legs of the first and second rigid L supports slidingly coupled together, and the second legs of the first and third rigid L supports slidingly coupled together, the second legs of the first and second rigid L supports being held in parallel in the plane and the first legs of the first and third rigid L supports being held in parallel in the plane, the apparatus defining a corner receiving space between the first, second, and third rigid L-supports, and the second leg of the second rigid L support and the first leg of the third rigid L support being terminal legs of the apparatus spaced sufficiently to receive a corner into the corner receiving space; and further wherein, the first clamping foot is adjustably retained in the first leg of the first rigid L support and extends into the corner receiving space, the second clamping foot is adjustably retained in the second leg of the first rigid L support and extends into the corner receiving space at right angles to the first clamping foot, the third clamping foot is adjustably retained in the second leg of the second rigid L support and extends into the corner receiving space, and the fourth clamping foot is adjustably retained in the first leg of the third rigid L support and extends into the corner receiving space at right angles to the third clamping foot, and, wherein the first, second, third, and fourth clamping feet are adjustable toward and away from the corner receiving space in the plane.