Patent 8925418 was granted and assigned to Denso on January, 2015 by the United States Patent and Trademark Office.
A first outer wall of a boss portion has a first projection, which projects toward a first inner wall of a support member. A second outer wall of the boss portion has a second projection, which projects toward a second inner wall of the support member. The first inner wall of the support member has at least one projection, which projects toward the first outer wall. The second inner wall of the support member has at least one projection, which projects toward the second outer wall.