Patent ID: 8648259

Claim:
A grommet for housing electrical wires, the grommet comprising: a mounting structure configured to mount to a panel of a vehicle, the mounting structure including a first passage extending therethrough; and a tube coupled to and extending from the mounting structure, the tube defining a second passage that is in communication with the first passage, the tube including a corrugated portion having a plurality of ridges, a plurality of grooves, which are interposed between the plurality of ridges, and a plurality of stiffeners, the stiffeners being disposed in a zone of the corrugated portion such that each stiffener is disposed between and connects a pair of adjacent ridges, each of the stiffeners having a height that extends radially outward from the groove, the plurality of stiffeners including a first stiffener and a second stiffener, the first stiffener extending around a circumference of the tube by a first amount, the second stiffener extending around the circumference of the tube by a second amount that is different from the first amount.