US Patent 11312423 Device for reinforcing a structural element

A device for reinforcing a structural element in a motor vehicle including a reinforcing element, which has a longitudinal axis and which can be arranged in a cavity of the structural element. The reinforcing element includes walls which extend substantially in the direction of the longitudinal axis. The reinforcing element additionally includes at least one open side, which likewise extends in the direction of the longitudinal axis. The walls directly adjoining the open side are designed in a convergent manner in that extensions of said adjoining walls running in the direction of the open side and perpendicularly to the longitudinal axis intersect.