Corner connector clip in an air filter grid

Claim 1

An invertible corner connecting clip for use in completing either a right-hand or a left-hand corner when assembling a suspended ceiling latticework of the type including main and cross filter supporting members each having spaced apart side walls extending vertically from a bottom wall, said side walls of said main member having notches spaced along its length, to permit free ends of said cross support members to set therein with said bottom wall of each cross support member overlying the bottom wall of said main support member to place said spaced side walls of each cross support member in left and right-hand corner forming relationship with said main support member side walls, said invertible corner connecting clip comprising: an out-corner unit including a first out-corner plate having first horizontally extending upper and lower edges, and a first vertical common edge, a second out-corner corner plate having second horizontally extending upper and lower edges and a second vertical common edge, said first and second out-corner plates joined together along said common edges to form said out-corner unit; an in-corner unit including a first in-corner plate having first horizontally extending top and bottom edges and a first common vertical margin, a second in-corner plate having second horizontally extending top and bottom edges and a second common vertical margin; said first and second in-corner plates joined together along said common margins to form said in-corner unit; means connecting said out-corner unit and in-corner units in spaced parallel relationship to each other to form pockets of uniform width to receive said side walls of said main and cross support members therebetween; said first upper and lower edges of said first out-corner plate each having a horizontal notch therein adjacent said first common edge, said notch having a vertical dimension equal to the thickness of said bottom wall; and said second out-corner plate having a vertical dimension equal to the vertical length of said first common edge between said horizontal notches to define upper and lower relieved areas adjacent the top and bottom edges of said second out-corner plate for accommodating the thickness of said bottom wall when assembled in a latticework to permit inversion of said clip for use in completing either a right or a left-hand corner connection between main and cross member side walls.