Patent ID: 9054511
Filing Date: 2015-06-09
Classification: H02G

Abstract:
1. A sheet metal structure, comprising: a parent part formed in a portion of the sheet metal; a knockout having a knockout perimeter comprising a plurality of knockout cuts, each knockout cut extending completely through the sheet metal along a continuous elongated path; and a tab disposed on the knockout perimeter, the tab defined by a region of the sheet metal enclosed within a tab perimeter, the tab perimeter consisting of a first cut, a second cut, a first neck and a second neck, the first cut extending completely through the sheet metal along a first continuous elongated path between a first end of the first cut and a second end of the first cut, the second cut extending completely through the sheet metal along a second continuous elongated path between a first end of the second cut and a second end of the second cut, the first neck extending between the first end of the first cut and the first end of the second cut and extending between the tab and the parent part, the second neck extending between the second end of the first cut and the second end of the second cut and extending between the tab and the knockout, each of the first and second necks subject to torsional fatigue in response to rotation of the tab about an axis between the first and second necks.