Patent ID: 8528979

Claim:
A plurality of flat plates to be joined together without tools, comprising: an insert plate having two tension fingers and two shear fingers; and a receiver plate having three collinear holes adapted to engage the two tension fingers and the two shear fingers, wherein the two tension fingers are to be displaced from a rest position if the fingers of the insert plate are inserted into a central hole of the three collinear holes of the receiver plate; the two tension fingers are to return to near their rest position if the insert plate is fully inserted into the receiver plate; the two tension fingers have a barbed shape to resist removal of the insert plate from the receiver plate after the insert plate is fully inserted into the receiver plate, a first of the two shear fingers is positioned to enter a first outside one of the three collinear holes of the receiver plate; and a second of the two shear fingers is positioned to enter a second outside one of the three collinear holes of the receiver plate.