Patent ID: 9682762
Date: 2017-06-20
CPC Classifications: B64C,Y02T

Claim:
1. A stiffener, comprising: a first flange; a first web extending at a first angle from the first flange, a first intersection of the first flange and the first web being curved; a second flange opposite the first flange, the first flange and the second flange forming a plane; a second web extending at a second angle from the second flange, the second web opposite the first web, a second intersection of the second flange and the second web being curved; a cap connecting the first web and the second web, the cap being curved and forming a curved hat shape for the stiffener, and wherein the first flange, the first web, the second flange, the second web, and the cap form a continuous structure; and a stiffener end of the stiffener, the stiffener end having an end face, the end face characterized by: