Patent ID: 8490347
Filing Date: 2013-07-23
Classification: E06B

Abstract:
1. A corner joint for a window or door frame, which includes: a first frame member having a mitered end, at least one cavity in said mitered end and at least one side wall opening into said cavity, a second frame member having a mitered end, at least one cavity in said mitered end and at least one side wall opening into said cavity, a screw boss in said cavity of said first frame member, a detent lug on a flexible resilient portion of said screw boss and received in said side wall opening of said first frame member, a corner key having a first leg received in said cavity of said first frame member over said screw boss and holding said screw boss in said first frame member, and a second leg received in said cavity of said second frame member, and a screw extending through said side wall opening in said second frame member and through said corner key, and threaded into said screw boss to clamp said mitered ends of said frame members together.