Patent ID: 8307596

Claim:
A key construction for joinder of first and second hollow muntin bars, each muntin bar having a hollow end, said construction comprising, in combination: a first key member including an insertion end and an interlocking end; a separate second key member including an insertion end and an interlocking end; each said key member including a longitudinal axis, the insertion end of each key member comprising at least one axially extending support rib, said support rib including at least one pair of oppositely extending, generally transversely extending wings, said wings sized and positioned for frictional engagement into the hollow end of a muntin bar; and said interlocking ends of the first and second key members each including a substantially identical, axially projecting prong, said axially projecting prongs each including a surface with interlocking elements, said interlocking elements of said first and second prongs engaged with each other whereby said first and second key members are joined together.