Arm head
AssigneesNippon Wiper Blade Co., Ltd., Asmo Co., Ltd.
InventorsToshio Shido, Noboru Ishida
Life of this patent
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Abstract
An arm head includes an end portion to which a retainer is pivotally coupled and a surface covered by a coating. The end portion includes a coupling bore. The coupling bore includes an open end. First and second surfaces of the arm head form an annular recess around the open end that extends continuously from the open end. The radial outer surface extends outward in a radial direction from the annular recess. The first surface extends outward in the radial direction from the open end. The first surface is located inward in an axial direction of the coupling bore from the radial outer surface. The second surface extends from the first surface to the radial outer surface at an angle less than 180° with respect to the first surface.
Claims13
An arm head comprising a longitudinal end portion to which a retainer is pivotally coupled and a surface covered by a coating, wherein:
- the end portion includes a coupling bore, wherein the retainer is pivotal relative to the arm head about an axis of a shaft extending through the coupling bore, and the coupling bore includes an open end that opens outward from the arm head;
- the arm head includes first and second surfaces forming an annular recess around the open end and a radial outer surface, wherein the annular recess extends continuously from the open end, and the radial outer surface extends outward in a radial direction from the annular recess;
- the first surface extends outward in the radial direction from the open end and is located in the arm head inward in an axial direction of the coupling bore from the radial outer surface;
- and
- the second surface extends from the first surface to the radial outer surface at an angle less than 180° with respect to the first surface.
An arm head covered by a coating and pivotally coupled by a shaft to a retainer, wherein the arm head includes a coupling bore into which the shaft is fitted, and the coupling bore includes an open end that opens outward from the arm head, the arm head comprising:
- annular first and second surfaces forming an annular recess around the open end, wherein the annular recess is continuously from the open end;
- and
- a radial outer surface extending outward in a radial direction from the annular recess, wherein
- the first surface extends outward in the radial direction from the open end and is located in the arm head inward in an axial direction of the coupling bore from the radial outer surface, and
- the second surface extends from a radially outer edge of the first surface to a radially inner edge of the radial outer surface at an angle less than 180° with respect to the first surface.
Dependencies are inferred from the claim text.